WO2022028551A1

WO2022028551A1 - Communication method and apparatus, and computer-readable storage medium

Info

Publication number: WO2022028551A1
Application number: PCT/CN2021/111007
Authority: WO
Inventors: 黄海宁; 黎超; 张莉莉
Original assignee: 华为技术有限公司
Priority date: 2020-08-07
Filing date: 2021-08-05
Publication date: 2022-02-10
Also published as: CN114071558B; CN114071558A

Abstract

Disclosed in embodiments of the present application are a communication method and apparatus, and a computer-readable storage medium. The method comprises: sending first indication information to a first terminal device, the first indication information being used for triggering CSI reporting; activating a first timer; and monitoring a PSCCH or SCI within the activation time of the first timer. According to the embodiments of the present application, when indication information for triggering CSI reporting is sent to a first terminal device, activating a timer, and performing monitoring within the activation time of the timer can ensure the reliability of CSI report transmission.

Description

A communication method, apparatus and computer-readable storage medium

This application claims the priority of the Chinese patent application with the application number of 202010791696.X and the application title of "a communication method, device and computer-readable storage medium" filed with the China Patent Office on August 7, 2020, the entire contents of which are Incorporated herein by reference.

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method, an apparatus, and a computer-readable storage medium.

Background technique

The terminal equipment generally uses a power supply device with limited power such as a battery. Therefore, when the power consumption of the terminal equipment is large, the use time of the terminal equipment is short. For example, when the terminal device is always in the receiving state, the power consumption of the terminal device is relatively large. In order to solve the above problems, discontinuous reception (DRX) has been introduced in the industry. DRX includes an active period and a dormant period. When the terminal device is in the active period, it monitors the physical downlink control channel (PDCCH). When the terminal device is in the dormant period, it does not monitor the PDCCH, thereby reducing the power consumption of the terminal device. .

Currently, the sidelink (sidelink, SL) can determine the transmission resource through perception, for example, determine the resource for transmitting the CSI report. However, after the introduction of DRX in SL, since the terminal equipment cannot receive information when it is in the dormant period of DRX, the terminal equipment cannot determine the transmission resources through sensing, or the sensing time is shortened, which increases the probability of collision of the determined transmission resources and reduces the reliability of CSI report transmission.

SUMMARY OF THE INVENTION

The embodiments of the present application disclose a communication method, an apparatus, and a computer-readable storage medium, which are used to ensure the reliability of CSI report transmission.

A first aspect discloses a communication method. The communication method can be applied to a second terminal device, and can also be applied to a module (eg, a chip) in the second terminal device. The second terminal device is used as an example for description below. The communication method may include: sending first indication information to a first terminal device, activating a first timer, and monitoring a physical sidelink control channel (PSCCH) or a sidelink control channel (PSCCH) within an activation time of the first timer. Downlink control information (sidelink control information, SCI). The first indication information is used to trigger the reporting of channel state information (channel state information, CSI).

In this embodiment of the present application, the second terminal device may send indication information for triggering CSI reporting to the first terminal device, and activate a timer, and within the activation time of the timer, the PSCCH or SCI may be monitored, so that the second terminal The device can receive information from other terminal devices, network devices and other devices within the activation time of this timer. It can be seen that after the introduction of DRX in SL, when the second terminal device sends the indication information for triggering CSI reporting to the first terminal device, a timer can be activated, which can solve the problem that the terminal device is in DRX due to the introduction of DRX in SL. The technical problem is that the CSI report fed back by the first terminal device cannot be received due to the dormancy period. Since the second terminal device sends information for triggering CSI reporting to the first terminal device, a timer can be activated, and the second terminal device can keep the monitoring state within the activation time of the timer, which can ensure that the second terminal device The device will not miss the CSI report fed back by the first terminal device within the activation time of the timer, so that the reliability of the CSI report transmission can be guaranteed.

As a possible implementation manner, monitoring the PSCCH or the SCI is used to receive the CSI report from the first terminal device.

In this embodiment of the present application, the second terminal device monitors the PSCCH or the SCI within the activation time of the timer in order to receive the CSI report from the first terminal device. Since the second terminal device is in the dormant period of DRX and cannot receive the CSI report fed back by the first terminal device, therefore, when the second terminal device is in DRX, the reliability of CSI report transmission can be guaranteed.

As a possible implementation manner, the first indication information is carried on a first physical sidelink shared channel (physical sidelink shared channel, PSSCH).

As a possible implementation manner, the first PSSCH may further include a CSI-reference signal (reference signal, RS).

In this embodiment of the present application, in addition to sending the indication information for triggering CSI reporting to the first terminal device, the second terminal device also sends the CSI-RS to the first terminal device, so that when the first terminal device needs the CSI-RS When the RS generates the CSI report, the CSI report can be directly generated according to the received CSI-RS without the need to obtain the CSI-RS specially, which can ensure the reliability of CSI transmission and reduce the power consumption of the first terminal device.

As a possible implementation manner, the activation of the first timer by the second terminal device may include: at the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, activating the first timer, M is an integer greater than or equal to 1.

In this embodiment of the present application, the second terminal device activates the first timer in the symbol after the first PSSCH, the first indication information, or the end symbol of the CSI-RS, instead of activating the timer when the first PSSCH starts to be sent , since the first terminal device needs time to generate the CSI report after receiving the CSI trigger, the CSI report will not be fed back immediately when the second terminal device starts to send the first PSSCH. Therefore, starting the timer later can reduce the monitoring time of the second terminal device and reduce unnecessary activation time. Therefore, the power consumption of the terminal device can be reduced under the condition of ensuring the transmission reliability of the CSI report.

As a possible implementation manner, activating the first timer by the second terminal device may include: activating the first timer in the Mth timeslot after the timeslot where the first PSSCH, the first indication information or the CSI-RS is located , M is an integer greater than or equal to 1.

In the embodiment of this application, taking M as 1 as an example, the second terminal device activates the first timer in the first time slot after the time slot where the first PSSCH, the first indication information, or the CSI-RS is located, instead of The timer is activated at the first symbol after the end symbol of the first PSSCH. Since the first terminal device needs time to generate a CSI report after receiving the CSI trigger, the CSI report will not be fed back immediately after the second terminal device sends the first PSSCH. And the candidate position of PSCCH is in a fixed symbol position of a time slot (2 PSCCH symbols are the second symbol and the third symbol; PSCCH symbols are 3, the second symbol, the third symbol and the fourth symbol. symbols). Therefore, starting the timer later can reduce the monitoring time of the second terminal device and reduce unnecessary activation time. Therefore, the power consumption of the terminal device can be reduced under the condition of ensuring the transmission reliability of the CSI report.

As a possible implementation manner, the activation time of the first timer is determined according to the upper limit of the CSI reporting delay.

In this embodiment of the present application, since the channel state information changes with time, the CSI report reflects the channel state and is time-sensitive. Therefore, when the time interval between the indication information for triggering CSI reporting and the feedback CSI report is long, the reported CSI report may not reflect the channel state when CSI reporting is triggered, so that the CSI report loses timeliness. The upper limit of the CSI report delay is the maximum time limit for ensuring the timeliness of the CSI report. Therefore, in order to ensure the timeliness of the CSI report, the activation time of the timer should consider the upper limit of the CSI report delay.

As a possible implementation manner, the activation time of the first timer is less than or equal to a CSI report latency bound (report latency bound).

In this embodiment of the present application, since the channel state information changes with time, the CSI report reflects the channel state and is time-sensitive. Therefore, when the time interval between the indication information for triggering CSI reporting and the feedback CSI report is long, the reported CSI report may not reflect the channel state when CSI reporting is triggered, so that the CSI report loses timeliness. The upper limit of the CSI report delay is the maximum time limit for ensuring the timeliness of the CSI report. Therefore, in order to ensure the timeliness of the CSI report, the activation time of the timer may be less than or equal to the upper limit of the CSI report delay.

As a possible implementation manner, the activation of the first timer by the second terminal device includes: at the Nth symbol after the end symbol of the first PSSCH, the first indication information or the CSI-RS, activating the first timer, where N is An integer greater than the computation time of the CSI.

In this embodiment of the present application, the second terminal device activates the first timer after the calculation time of CSI after the first PSSCH, the first indication information, or the end symbol of the CSI-RS, rather than when the first PSSCH starts to be sent. The activation of the timer is also not to activate the timer immediately or immediately after the first PSSCH, the first indication information or the CSI-RS are sent. Since it takes a period of time between the first terminal equipment receiving the indication information for triggering the CSI reporting and the generation of the CSI report, this period of time is the calculation time of CSI, and the first terminal equipment will not send the CSI report within this period of time, Correspondingly, the second terminal equipment will not receive the CSI report sent by the first terminal equipment within this period of time. Therefore, the second terminal equipment may not monitor the control signaling or activate the timer within this period of time. The time for the second terminal device to monitor the control signaling is further reduced, so that the power consumption of the terminal device can be reduced as much as possible under the condition of ensuring the transmission reliability of the CSI report.

As a possible implementation manner, the activation time of the first timer is determined according to the upper limit of the CSI reporting delay and the calculation time of the CSI.

In this embodiment of the present application, since the channel state information changes with time, the CSI report reflects the channel state and is time-sensitive. Therefore, when the time interval between the indication information for triggering CSI reporting and the feedback CSI report is long, the reported CSI report may not be the channel state report when CSI reporting is triggered, so that the CSI report loses timeliness. The upper limit of the CSI report delay is the maximum time limit to ensure the timeliness of the CSI report. Therefore, the activation time of the first timer needs to consider the upper limit of the CSI reporting delay. In addition, since the first timer is activated after the calculation time of CSI after the end symbol of the first PSSCH, the first indication information or CSI-RS, the activation time of the first timer also needs to consider the calculation time of CSI .

As a possible implementation manner, the activation time of the first timer is less than or equal to the difference between the upper limit of the CSI reporting delay and the calculation time of the CSI.

In this embodiment of the present application, since the channel state information changes with time, the CSI report reflects the channel state and is time-sensitive. Therefore, when the time interval between the indication information for triggering CSI reporting and the feedback CSI report is long, the reported CSI report may not be the channel state report when CSI reporting is triggered, so that the CSI report loses timeliness. The upper limit of the CSI report delay is the maximum time limit to ensure the timeliness of the CSI report. Because the first timer is activated after the calculation time of the CSI after the first PSSCH, the first indication information or the end symbol of the CSI-RS. Therefore, in order to ensure the timeliness of the CSI report, the activation time of the timer may be less than or equal to the difference between the upper limit of the CSI report delay and the calculation time of the CSI.

As a possible implementation manner, the communication method may further include: in the first symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, activating the second timer, and in the second timer PSCCH or SCI is not monitored during the activation time.

In this embodiment of the present application, it takes a period of time between when the first terminal device receives the indication information for triggering CSI reporting and when the CSI report is generated, and the first terminal device does not feed back the CSI report during this time. However, the second terminal device may be in the active period of DRX during this period, and the second terminal device needs to monitor when it is in the active period of DRX. Therefore, the second terminal device monitors and cannot receive the feedback CSI report during this period of time. In order to avoid the above problem, the second terminal device uses another timer, so that the second terminal device does not listen to receive the feedback CSI report within the activation time of the other timer, so that the power consumption of the terminal device can be further reduced.

As a possible implementation manner, the first indication information may include a second-level SCI, and the second-level SCI may include a CSI request field, where the CSI request field is used to trigger CSI reporting.

As a possible implementation manner, the communication method may further include: when a CSI report from the first terminal device is received or the first timer times out, determining that the first timer expires.

In this embodiment of the present application, when the second terminal device receives the CSI report from the first terminal device, it indicates that the function of the timer has been completed, and the first timer expires, so that the second terminal device will not receive the CSI report from the first terminal device. The CSI report of the terminal device continues to monitor, so that the power consumption of the terminal device can be reduced. When the timer expires, it indicates that the probability of the first terminal device feeding back the CSI report is small, or even if the CSI report fed back by the first terminal device can be received later, because the CSI report loses its timeliness, there is not much chance of receiving the CSI report. significance. Therefore, there is no need to monitor the control signaling, and the first timer is invalid, so that the second terminal device does not continue to monitor for receiving the CSI report from the first terminal device, so that the power consumption of the terminal device can be reduced.

A second aspect discloses a communication method. The communication method can be applied to a first terminal device, and can also be applied to a module (eg, a chip) in the first terminal device. The first terminal device is used as an example for description below. The communication method may include: receiving the first indication information from the second terminal device, activating a third timer, and sending a CSI report to the second terminal device within the activation time of the third timer. The first indication information is used to trigger CSI reporting.

In this embodiment of the present application, the first terminal device may receive the indication information for triggering CSI reporting from the second terminal device, activate a timer, and send the CSI report to the second terminal device within the activation time of the timer. It can be seen that after DRX is introduced in SL, in the case where the first terminal device receives the indication information from the second terminal device for triggering CSI reporting, a timer can be activated, so as to solve the problem that the terminal device is in a situation where DRX is introduced into NR SL. The technical problem that the CSI report cannot be sent to the second terminal device during the dormant period of the DRX. Since the first terminal device receives the information that triggers the CSI report from the second terminal device, it can obtain transmission resources within the activation time of a timer and send the CSI report to the second terminal device. Therefore, it is possible to ensure that the CSI report is transmitted without delay. reliability.

As a possible implementation manner, sending the CSI report to the second terminal device by the first terminal device within the activation time of the third timer may include: monitoring the PSCCH or SCI, monitoring the PSCCH or SCI, and monitoring the PSCCH or SCI within the activation time of the third timer. for determining the second PSSCH; sending the second PSSCH to the second terminal device, where the second PSSCH includes the CSI report.

In this embodiment of the present application, the first terminal device can monitor the PSCCH or the SCI within the activation time of the third timer, so that when the first terminal device uses mode 2 to determine the SL transmission resource, the first terminal device can monitor the SL transmission resource by sensing or Partial sensing is used to determine the resources used for sending CSI reports, which can ensure that the resources used for sending CSI are idle resources, available resources, or resources with less interference, which can reduce the interference to the transmission of CSI reports, so that the Ensure the reliability of CSI report transmission.

As a possible implementation manner, the first indication information is carried on the first PSSCH.

As a possible implementation manner, the first PSSCH may further include CSI-RS.

In this embodiment of the present application, in addition to receiving the indication information for triggering CSI reporting from the second terminal device, the first terminal device may also receive CSI-RS from the second terminal device together, and when a CSI report needs to be generated In this case, the received CSI-RS can be directly used without the need to obtain information for generating the CSI report, which can reduce the processing process of the first terminal device, thereby ensuring the timeliness of the CSI report and better performing link automation. The adaptive transmission reduces the power consumption of the first terminal device.

As a possible implementation manner, activating the third timer by the first terminal device may include: at the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, activating the third timer, M is an integer greater than or equal to 1.

In the embodiment of the present application, the first terminal device activates the third timer in the symbol after the first PSSCH, the first indication information, or the end symbol of the CSI-RS, instead of activating the timer when it starts to receive the first PSSCH. Since the first terminal device has not yet generated the CSI report when it starts to receive the first PSSCH, the CSI report will not be sent. It can be seen that the symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS activates the third timer, which can reduce the time for the first terminal device to monitor the control signaling, thereby ensuring the transmission reliability of the CSI report. reduce the power consumption of the terminal equipment.

As a possible implementation manner, activating the third timer by the first terminal device may include: activating the third timer in the Mth time slot after the time slot where the first PSSCH, the first indication information or the CSI-RS is located , M is an integer greater than or equal to 1.

In the embodiment of this application, taking M as 1 as an example, the first terminal device activates the third timer in the first time slot after the time slot where the first PSSCH, the first indication information, or the CSI-RS is located, instead of receiving The timer is activated at the first symbol after the end symbol of the first PSSCH. Since the first terminal device needs processing time to generate the CSI report after receiving the first PSSCH, the CSI report cannot be sent immediately. Therefore, within the time interval between the end symbol of the first PSSCH and the start symbol of the next time slot of the time slot where the first PSSCH is located, the first terminal device may be in an inactive state. - The third timer is activated in the first time slot after the time slot where the RS is located, which can reduce the time for the first terminal device to monitor the control signaling, thereby reducing the power consumption of the terminal device while ensuring the transmission reliability of the CSI report .

As a possible implementation manner, the activation time of the third timer is determined according to the upper limit of the CSI reporting delay.

In this embodiment of the present application, since the channel state information changes with time, when the time interval between the indication information for triggering the CSI report and the time for sending the CSI report is long, the CSI report may lose its time limit. sex. The upper limit of the CSI report delay is the maximum time limit for ensuring the timeliness of the CSI report. When the time for sending the CSI report exceeds the upper limit of the CSI report delay, the sent CSI report is meaningless due to the loss of timeliness. Therefore, in order to ensure the reliability of CSI report transmission, in order to ensure the timeliness of the sent CSI report, and in order to reduce the power consumption of the first terminal device, the activation time of the timer should take into account the upper limit of the CSI report delay.

As a possible implementation manner, the activation time of the third timer is less than or equal to the upper limit of the CSI reporting delay.

In this embodiment of the present application, since the channel state information changes with time, when the time interval between the indication information for triggering the CSI report and the time for sending the CSI report is long, the CSI report may lose its time limit. sex. The upper limit of the CSI report delay is the maximum time limit for ensuring the timeliness of the CSI report. When the time for sending the CSI report exceeds the upper limit of the CSI report delay, the sent CSI report is meaningless due to the loss of timeliness. Therefore, in order to ensure the reliability of the CSI report transmission, to ensure the timeliness of the sent CSI report, and to reduce the power consumption of the first terminal device, the activation time of the timer may be less than or equal to the upper limit of the CSI report delay.

As a possible implementation manner, activating the third timer by the first terminal device may include: at the Nth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, activating the third timer, N is an integer greater than the computation time of the CSI.

In the embodiment of the present application, the first terminal device activates the third timer after the calculation time of the CSI after the first PSSCH, the first indication information or the end symbol of the CSI-RS, instead of activating the timer when it starts to receive the first PSSCH , and the timer is not activated immediately after receiving the first PSSCH, the first indication information or the CSI-RS. Since it takes a period of time between the first terminal device receiving the indication information triggering the CSI report and the generation of the CSI report, the period of time is the calculation time of the CSI, and the first terminal device will not send the CSI report within this period of time. Therefore, reactivating the timer after this period of time can prevent the first terminal device from monitoring the control signaling during this period, which can further reduce the time for the first terminal device to monitor the control signaling, thereby ensuring the CSI The power consumption of the terminal equipment is reduced as much as possible under the condition of reporting transmission reliability.

As a possible implementation manner, the activation time of the third timer is determined according to the upper limit of the CSI reporting delay and the calculation time of the CSI.

In this embodiment of the present application, since the channel state information changes with time, when the time interval between the indication information for triggering the CSI report and the sending of the CSI report is long, the sent CSI report may lose its time limit. sex. Therefore, the activation time of the timer needs to consider the upper limit of the CSI reporting delay. Since the timer activates the first timer after the calculation time of CSI after the first PSSCH, the first indication information or the end symbol of the CSI-RS, the activation time of the timer also needs to consider the calculation time of CSI.

As a possible implementation manner, the activation time of the third timer is less than or equal to the difference between the upper limit of the CSI reporting delay and the calculation time of the CSI.

In this embodiment of the present application, since the channel state information changes with time, when the time interval between the indication information for triggering the CSI report and the sending of the CSI report is long, the sent CSI report may lose its time limit. sex. Since the timer is activated after the calculation time of CSI after the first PSSCH, the first indication information or the end symbol of the CSI-RS, in order to ensure the reliability of CSI report transmission, in order to ensure the transmission of the CSI report and in order to reduce the power consumption of the first terminal device, the activation time of the timer may be less than or equal to the difference between the upper limit of the CSI reporting delay and the calculation time of the CSI.

As a possible implementation manner, the communication method may further include: in the first symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, activating a fourth timer, and at the end of the fourth timer PSCCH or SCI is not monitored during the activation time.

In this embodiment of the present application, it takes a period of time between when the first terminal device receives the indication information that triggers the CSI report and when the CSI report is generated, and the first terminal device does not send the CSI report during this time. However, when the first terminal device is in the DRX activation period during this period, the first terminal equipment needs to monitor during this period. Therefore, another timer can be used during this period so that the first terminal equipment can monitor The control signaling may not be monitored during the activation time of the other timer, thereby further reducing the power consumption of the terminal device.

As a possible implementation manner, the communication method may further include: when the sending of the CSI report is completed, determining that the third timer expires.

In the embodiment of the present application, when the first terminal device finishes sending the CSI report, it indicates that the function of this timer has been completed, and monitoring the CSI report is meaningless. Therefore, the third timer is invalid, so that the first terminal device will not Unnecessary monitoring is performed for the CSI report, so that the power consumption of the terminal device can be reduced.

As a possible implementation manner, the communication method may further include: generating a CSI report according to the CSI-RS.

In this embodiment of the present application, the first terminal device can directly use the received CSI-RS to generate a CSI report without the need to specifically acquire information for generating a CSI report, which can reduce the processing process, thereby ensuring the timeliness of the CSI report, and better The link adaptive transmission can reduce the power consumption of the terminal equipment.

A third aspect discloses a communication method. The communication method can be applied to a first terminal device, and can also be applied to a module (eg, a chip) in the first terminal device. The first terminal device is used as an example for description below. The communication method may include: receiving second indication information from the second terminal equipment, where the second indication information is used to trigger CSI reporting; when the first terminal equipment is in DRX, sending the second terminal equipment to the second terminal equipment within the upper limit of the CSI reporting delay The third PSSCH, the third PSSCH includes the CSI report; when there is an intersection between the upper limit of the CSI report delay and the activation time of DRX, the time domain resources of the third PSSCH belong to the intersection between the upper limit of the CSI report delay and the activation time of DRX .

In the embodiment of the present application, the first terminal device may send the CSI report to the second terminal device within the upper limit of the CSI report delay, which can ensure the timeliness of the CSI report. In addition, when the first terminal device is in DRX, when there is an intersection between the upper limit of the CSI report delay and the activation time of DRX, the first terminal device sends the CSI report in the intersection of the upper limit of the CSI report delay and the activation time of DRX, and When the DRX of the first terminal device and the second terminal device are aligned, it is convenient for the second terminal device to receive the CSI report. Successful transmission of CSI reports and link adaptation can be guaranteed.

As a possible implementation manner, when there is no intersection between the upper limit of CSI reporting delay and the activation time of DRX, the resources of the third PSSCH are resources determined by random selection.

In the embodiment of the present application, when there is no intersection between the upper limit of the CSI reporting delay and the activation time of DRX, it indicates that the first terminal device is in the dormant period of DRX within the upper limit of the CSI reporting delay, and the first terminal device cannot use the sensing or partial sensing to determine the transmission resources. Since the sensing result cannot be obtained, the reliability and interference situation of the determined transmission resources cannot be guaranteed. Therefore, the first terminal device can randomly select the resources for sending the CSI report, so as to When the first terminal device is in the dormant period of DRX, normal transmission of the CSI report can be guaranteed. At this time, the random selection method may not be in the same resource pool as the sensing or partial sensing method, so as to avoid the unfair problem caused by different interference caused by the terminal equipment transmitting data.

As a possible implementation manner, when there is an intersection between the upper limit of the CSI reporting delay and the activation time of the DRX, the resources of the third PSSCH are resources determined through sensing or partial sensing.

In this embodiment of the present application, when there is an intersection between the upper limit of the CSI reporting delay and the activation time of DRX, the first terminal device can determine the transmission resources through sensing or partial sensing, and can ensure that the resources used for sending CSI are idle resources, Available resources or resources with less interference can reduce interference to CSI report transmission, thereby ensuring reliability of CSI report transmission.

As a possible implementation manner, when there is an intersection between the upper limit of the CSI reporting delay and the activation time of DRX, and the second ratio is greater than the seventh threshold, the resources of the third PSSCH are determined by sensing or partial sensing, and the third PSSCH resource is determined by sensing or partial sensing. The second ratio is the ratio of the activation time of DRX and the overlapping time of the sensing window to the sensing window.

In the embodiment of the present application, when there is an intersection between the upper limit of the CSI report delay and the activation time of DRX, and the first ratio is greater than the seventh threshold, it indicates that the sensing result can be trusted, and the interference caused by the reduction of the sensing result is limited. , the resource can be determined using a perceptual approach.

As a possible implementation manner, when there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX, and the second ratio is less than or equal to the seventh threshold, the resources of the third PSSCH are determined by random selection, and the resources of the third PSSCH are determined by random selection. The second ratio is the ratio of the activation time of DRX and the overlapping time of the sensing window to the sensing window.

In this embodiment of the present application, when there is an intersection between the upper limit of the CSI reporting delay and the activation time of DRX, and the first ratio is less than or equal to the seventh threshold, it indicates that the results determined by the sensing method are too few to guarantee that the results determined by the sensing method cannot be guaranteed. Reliability of resources, which can be determined by random selection.

As a possible implementation manner, the second indication information is carried on the fourth PSSCH.

In this embodiment of the present application, the second indication information is transmitted through the physical sideline shared channel.

As a possible implementation manner, the fourth PSSCH may further include CSI-RS.

In this embodiment of the present application, in addition to receiving the indication information for triggering CSI reporting from the second terminal device, the first terminal device also receives the CSI-RS from the second terminal device. In the case where a CSI report needs to be generated, the received CSI-RS can be directly used without the need to acquire information for generating a CSI report, the information acquisition process can be reduced, and the timeliness of the CSI report can be ensured, so that the CSI report can be better The link adaptive transmission can reduce the power consumption of the terminal equipment.

In the embodiment of the present application, the first terminal device can directly use the received CSI-RS to generate a CSI report, and does not need to specifically acquire information for generating a CSI report, which can reduce the information acquisition process, thereby ensuring the timeliness of the CSI report, and more efficient Good link-adaptive transmission can reduce the power consumption of terminal equipment.

As a possible implementation manner, the second indication information may include a second-level SCI, and the second-level SCI may include a CSI request field, where the CSI request field is used to trigger CSI reporting.

A fourth aspect discloses a communication method, which can be applied to a second terminal device or a module (eg, a chip) in the second terminal device. The second terminal device is used as an example for description below. The communication method may include: sending a CSI report delay upper limit to the first terminal device, where the CSI report delay upper limit is greater than the sum of the sleep time of the DRX and the calculation time of the CSI.

In the embodiment of the present application, since the channel state information changes with time, the CSI report reflects the channel state and is time-sensitive. Therefore, the time interval between the first terminal device receiving the information triggering the CSI reporting and reporting the CSI report cannot be too long, otherwise the CSI report may lose the timeliness. The upper limit of the CSI report delay is the maximum time that can ensure the timeliness of the CSI report. The second terminal device may configure the upper limit of the CSI report delay to the first terminal device. Since the first terminal device needs CSI calculation time to generate the CSI report, the first terminal device cannot report to the DRX sleep time and the process of generating the CSI report. The second terminal device sends the CSI report. Therefore, the upper limit of the CSI report delay configured by the second terminal device to the first terminal device may be greater than the sum of the sleep time of DRX and the calculation time of CSI, so as to prevent the first terminal device from being unable to pass the sensing In the case where the CSI report is sent from the resource determined by the method of partial sensing, it can be ensured that the first terminal device has enough time and better transmission resources to send the CSI report, thereby improving the reliability of the CSI report transmission.

A fifth aspect discloses a communication method. The communication method can be applied to a first terminal device, and can also be applied to a module (eg, a chip) in the first terminal device. The first terminal device is used as an example for description below. The communication method may include: receiving a CSI report delay upper limit from the second terminal device, where the CSI report delay upper limit is greater than the sum of the sleep time of the DRX and the calculation time of the CSI.

In the embodiment of the present application, since the channel state information changes with time, the CSI report reflects the channel state and is time-sensitive. Therefore, the time interval between the first terminal device receiving the information triggering the CSI report and sending the CSI report cannot be too long, otherwise the CSI report may lose the timeliness. The upper limit of the CSI report delay is the maximum time that can ensure the timeliness of the CSI report. The first terminal device can receive the upper limit of the CSI reporting delay configured by the second terminal device. If the first terminal device receives the indication information that triggers CSI reporting, it is in the active period of DRX, and the time between this time and the dormant period of DRX is The interval is less than or equal to the calculation time of the CSI. Since the time for the first terminal device to generate the CSI report requires the calculation time of the CSI, the first terminal device cannot generate the CSI report during the activation period of this DRX cycle. When the CSI report can be sent, the first terminal device is already in the dormant period of DRX, and the first terminal device cannot determine the transmission resource through sensing or partial sensing, and needs to wait until the activation period of the next DRX cycle. When waiting for the next activation period of DRX, if the time from receiving the indication information triggering CSI reporting has been greater than or equal to the upper limit of CSI reporting delay, the CSI reporting loses its timeliness and the reporting will be meaningless. Therefore, the configured upper limit of the CSI report delay can be greater than the sum of the sleep time of DRX and the calculation time of CSI, so as to avoid the situation that the first terminal device cannot send the CSI report through the resource determined by perception or partial perception, and it can ensure that the first terminal device The device has enough time and better transmission resources to send the CSI report, so that the reliability of the CSI report transmission can be improved.

A sixth aspect discloses a communication method, which can be applied to a second terminal device or a module (eg, a chip) in the second terminal device. The second terminal device is used as an example for description below. The communication method may include: sending a first duration to the first terminal device, the first duration is greater than or equal to the upper limit of CSI reporting delay or the calculation time of CSI, and the first duration is the duration of the inactive timer.

In this embodiment of the present application, the second terminal device may configure the first terminal device with the duration of the inactive timer, and the duration may be greater than or equal to the upper limit of the CSI reporting delay or the calculation time of the CSI, so that the second terminal device can notify the first terminal device of the duration of the inactive timer. After the device sends an indication message for triggering CSI reporting, the first terminal device can determine the resources for reporting the CSI report by sensing or partially sensing within the activation time of the inactive timer, and the first terminal device has enough resources. Time can generate CSI reports, so that the reliability of CSI report transmission can be guaranteed.

As a possible implementation manner, the sending of the first duration by the second terminal device to the first terminal device may include: when the overlap time between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the calculation time of the CSI , and send the first duration to the first terminal device.

In the embodiment of the present application, when the overlap time between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the calculation time of the CSI, after receiving the information for triggering the CSI reporting, the first terminal device prepares the When the CSI report is generated, the first terminal device may be in the dormant period of DRX, so that the first terminal device cannot determine the transmission resource according to the sensing or partial sensing method, or the determined transmission resource collides due to the shortening of the sensing time. The probability increases, so that the CSI report cannot be reported, or the reliability of the CSI report transmission cannot be guaranteed. Therefore, when the overlapping time between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the calculation time of the CSI, the second terminal device may configure the first terminal device with the duration of the inactivity timer, which is greater than or equal to the upper limit of the CSI reporting delay or the calculation time of CSI, so that after the first terminal device receives the indication information used to trigger CSI reporting from the second terminal device, it can detect or partially The resource for reporting the CSI report is determined in a perceptual manner, and the first terminal device has enough time to generate the CSI report, so that the reliability of the transmission of the CSI report can be guaranteed.

A seventh aspect discloses a communication method. The communication method can be applied to a first terminal device or a module (eg, a chip) in the first terminal device. The first terminal device is used as an example for description below. The communication method may include: receiving a first duration from the second terminal device, the first duration is greater than or equal to a CSI reporting delay upper limit or a CSI calculation time, and the first duration is the duration of the inactive timer.

In this embodiment of the present application, after the first terminal device receives the information that triggers the CSI report during the activation period of the DRX, if the CSI report cannot be prepared (ie, generated) or is just ready during the activation period of the DRX cycle, the first terminal device will When the terminal device is ready to send the CSI report, the first terminal device is in the dormant period of DRX, so that the first terminal device cannot determine the transmission resource according to the sensing or partial sensing method, or the determined transmission resource conflicts due to the shortened sensing time The probability of the CSI report is increased, so that the CSI report cannot be reported, or the reliability of the CSI report transmission cannot be guaranteed. It is necessary to wait until the activation period of the next DRX cycle to send the CSI report, which not only has a large delay, but also if waiting until the next DRX cycle The time between the time of receiving the indication information triggering CSI reporting and the time of receiving the indication information triggering the CSI reporting is equal to or greater than the upper limit of the CSI reporting delay, then the CSI reporting is unnecessary to report due to the loss of timeliness. Therefore, the first terminal device may receive the duration of the inactive timer configured by the second terminal device, and the duration may be greater than or equal to the upper limit of the CSI reporting delay or the calculation time of the CSI. After receiving the indication information that triggers the CSI report, the first terminal device can activate the inactive timer, and within the activation time of the inactive timer, the first terminal device can determine the resource for transmitting the CSI report by sensing or partially sensing, and sending the CSI report to the second terminal device through the determined resource. In addition, in order to ensure that the first terminal device has enough time, the duration may be greater than or equal to the upper limit of the CSI reporting delay or the calculation time of the CSI. It can be seen that the reliability of CSI report transmission can be improved.

As a possible implementation manner, the first terminal device receiving the first duration from the second terminal device may include: when the overlap time between the upper limit of the CSI reporting delay and the activation time of the DRX cycle of the first terminal device is less than the CSI When calculating the time, the first duration is received from the second terminal device.

In the embodiment of the present application, when the overlap time between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the calculation time of the CSI, after receiving the information for triggering the CSI reporting, the first terminal device prepares the When the CSI report is good, the first terminal device will be in the dormant period of DRX, so that the first terminal device cannot determine the transmission resource according to the perception or partial perception, or the probability of the determined transmission resource conflict increases due to the shortening of the perception time, Therefore, the CSI report cannot be reported, or the reliability of the transmission of the CSI report cannot be guaranteed, which reduces the timeliness of the CSI report. Therefore, when the overlap time between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the calculation time of the CSI, the first terminal device can receive the duration of the inactive timer configured by the second terminal device. The duration is greater than or equal to the upper limit of the CSI reporting delay or the calculation time of CSI, so that after the first terminal device receives the indication information from the second terminal device for triggering CSI reporting, it can pass the sensor during the activation time of the inactive timer. The resource for reporting the CSI report is determined in a partially perceptual manner, and the first terminal device has enough time to generate the CSI report, so that the reliability of the CSI report transmission can be ensured.

An eighth aspect discloses a communication method, which can be applied to a first terminal device or a module (eg, a chip) in the first terminal device. The first terminal device is used as an example for description below. The communication method may include: receiving third indication information from the second terminal equipment, where the third indication information is used to trigger CSI reporting; when the overlap length between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal equipment is greater than or equal to the first time, sending a CSI report to the second terminal device.

In the embodiment of the present application, after receiving the information for triggering CSI reporting from the second terminal device, the first terminal device may first determine whether the overlap time between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is greater than or equal to (or greater than) the first time, when it is determined that the overlap time between the upper limit of the CSI reporting delay and the activation time of the first terminal equipment DRX is greater than or equal to (or greater than) the first time, indicating that the first terminal equipment The CSI report can be generated during the active period of this DRX cycle, and the resource used for transmitting the CSI report can be determined in a perceptual or partial perceptual manner, and the CSI report can be sent to the second terminal device, which can improve the reliability of the transmission of the CSI report.

As a possible implementation manner, the first time may be the calculation time of the CSI, the first threshold, or the first proportion of the upper limit of the CSI reporting delay.

In the embodiment of the present application, the calculation time of the CSI is considered, and it can be ensured that the first terminal device has enough time to generate the CSI report. The first threshold and the first ratio may be configured by the network device, may be pre-configured, may be adaptively determined by the first terminal device, or may be configured by the second terminal device. However, in order to ensure that the first terminal device has enough time to generate the CSI report, the first ratio between the first threshold and the upper limit of the CSI report delay should be greater than or equal to the calculation time of the CSI.

As a possible implementation manner, the communication method may further include: when the overlap length between the upper limit of the CSI reporting delay and the activation time of the DRX is less than the first time, determining not to report the CSI report, or switching the period of the DRX, switching The overlapping length between the activation time of the later DRX and the upper limit of the CSI reporting delay is greater than or equal to the first time.

In the embodiment of the present application, when it is determined that the overlap time between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the first time, it indicates that the first terminal device cannot generate CSI during the activation period of the DRX cycle report, the CSI report may not be sent to the second terminal device, unnecessary processing may be reduced, and power consumption of the terminal device may be reduced. The period of DRX can also be adjusted so that the overlap length between the activation time of the adjusted DRX and the upper limit of the CSI reporting delay is greater than or equal to the first time, so that the first terminal device can generate The CSI report and the resource used for transmitting the CSI report can be determined in a perceptual or partially perceptual manner, and the CSI report can be sent to the second terminal device, so that the reliability of the transmission of the CSI report can be improved.

As a possible implementation manner, the first terminal device receiving the third indication information from the second terminal device may include: receiving the third indication information and the priority value of the third indication information from the second terminal device; the first The period for the terminal device to switch the DRX may include: when the value of the priority is less than the second threshold, switching the period for the DRX.

In this embodiment of the present application, when the first terminal device receives the indication information for triggering CSI reporting, it can also receive the value of the priority of the indication information. When the overlapping time between the activation times of the DRX is less than the first time, it may be judged first whether the value of the priority of the indication information is less than the second threshold. When it is judged that the value of the priority of the indication information is less than the second threshold, it indicates that the CSI report is more important. In order to ensure the normal transmission of the CSI report, the period of the DRX can be adjusted to ensure the reliability of the transmission of the important CSI report. sex. The smaller the priority value is, the higher the priority level is.

As a possible implementation manner, the third indication information is carried on the fifth PSSCH.

As a possible implementation manner, the fifth PSSCH may further include CSI-RS.

In this embodiment of the present application, in addition to receiving the indication information for triggering CSI reporting from the second terminal device, the first terminal device also receives the CSI-RS from the second terminal device, so that the first terminal device can When necessary, the CSI report can be generated according to the CSI-RS, without the need to obtain the information for generating the CSI report, which can reduce the processing process, thereby ensuring the timeliness of the CSI report and better performing link adaptation. transmission, which can reduce the power consumption of the terminal device.

In the embodiment of the present application, the first terminal device can directly generate the CSI report according to the received CSI-RS, and does not need to obtain the information for generating the CSI report specially, which can reduce the processing process, thereby ensuring the timeliness of the CSI report, and better The link adaptive transmission can reduce the power consumption of the terminal equipment.

As a possible implementation manner, the third indication information may include a second-level SCI, and the second-level SCI may include a CSI request field, where the CSI request field is used to trigger CSI reporting.

A ninth aspect discloses a communication method. The communication method can be applied to a first terminal device, and can also be applied to a module (eg, a chip) in the first terminal device. The first terminal device is used as an example for description below. The communication method may include: receiving fourth indication information from the second terminal equipment, where the fourth indication information is used to trigger CSI reporting; when the overlap length between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal equipment When it is time, the period of the DRX is switched, and the overlapping length between the activation time of the switched DRX and the upper limit of the CSI reporting delay is greater than or equal to the first time.

In the embodiment of the present application, after receiving the information for triggering CSI reporting from the second terminal device, the first terminal device may first determine whether the overlap time between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than (or less than or equal to) the first time, and when it is determined that the overlap time between the upper limit of the CSI report delay and the activation time of the first terminal equipment DRX is less than (or less than or equal to) the first time, it indicates that the first terminal equipment The CSI report cannot be generated during the activation period of this DRX cycle, and the DRX cycle can be adjusted so that the overlap length between the adjusted DRX activation time and the CSI report delay upper limit is greater than or equal to the first time, so that the first terminal device During the activation period of the adjusted DRX cycle, a CSI report can be generated and the resource for transmitting the CSI report can be determined in a perceptual or partially perceptual manner, and the CSI report can be sent to the second terminal device, thereby improving the reliability of CSI report transmission. sex.

As a possible implementation manner, the first time is the calculation time of the CSI, the first threshold, or the first ratio of the upper limit of the CSI reporting delay.

As a possible implementation manner, the first terminal device receiving the fourth indication information from the second terminal device may include: receiving the fourth indication information from the second terminal device and the value of the priority of the fourth indication information; the first The period for the terminal device to switch the DRX may include: when the value of the priority is less than the third threshold, switching the period for the DRX.

In this embodiment of the present application, when the first terminal device receives the indication information for triggering CSI reporting, it can also receive the value of the priority of the indication information. When the overlapping time between the activation times of the DRX is less than the first time, it may be first determined whether the value of the priority of the indication information is less than the third threshold. When it is judged that the value of the priority of the indication information is less than the third threshold, it indicates that the CSI report is more important. In order to ensure the normal transmission of the CSI report, the period of the DRX can be adjusted to ensure the reliability of the transmission of the important CSI report. sex. The smaller the priority value is, the higher the priority level is.

A tenth aspect discloses a communication method. The communication method can be applied to a first terminal device or a module (for example, a chip) in the first terminal device. The first terminal device is used as an example for description below. The communication method may include: receiving the data packet from the second terminal device and the value of the priority of the data packet; and disabling the DRX when the value of the priority is less than a fourth threshold.

In this embodiment of the present application, after receiving the data packet and the value of the priority of the data packet from the second terminal device, the first terminal device may first determine whether the value of the priority is less than the fourth threshold. When it is determined that the value of the priority is less than the fourth threshold, it indicates that the service corresponding to the data packet is more important, and DRX can be disabled. When the service is important, the first terminal device is in DRX, and there is a risk that the first terminal device cannot receive data. Therefore, DRX can be disabled, so as to ensure the reliability of important service transmission. The smaller the priority value is, the higher the priority level is.

An eleventh aspect discloses a communication method. The communication method can be applied to a first terminal device, and can also be applied to a module (eg, a chip) in the first terminal device. The first terminal device is used as an example for description below. The communication method may include: receiving a data packet from the second terminal device and a value of the priority of the data packet; and adjusting the period of the DRX according to the value of the priority.

In this embodiment of the present application, after receiving the data packet and the priority of the data packet from the second terminal device, the first terminal device may adjust the period of the DRX according to the value of the priority. For example, when the priority value of the data packet is low, the DRX cycle or the activation time of the DRX cycle can be increased, so that the reliability of the service transmission corresponding to the data packet can be guaranteed. For another example, in the case where the value of the priority of the data packet is high, the DRX cycle or the activation time of the DRX cycle can be reduced, so that the time during which the first terminal device is in the active period can be reduced, thereby reducing the function of the terminal device. consumption. The smaller the priority value is, the higher the priority level is.

A twelfth aspect discloses a communication method, which can be applied to a first terminal device or a module (eg, a chip) in the first terminal device. The first terminal device is used as an example for description below. The communication method may include: when the first terminal device is in DRX, determining a resource selection mode according to a first ratio, where the first ratio is the ratio of the DRX activation time and the overlapping time of the sensing window to the sensing window; when the first ratio is greater than the first ratio When the threshold is five, the resource selection method is the perceptual method, and when the first ratio is less than or equal to the fifth threshold, the resource selection method is the random selection method.

In this embodiment of the present application, when the first terminal device is in DRX, when the first terminal device wants to send data, it will be triggered to perform resource selection. Since the first terminal device is in DRX and cannot be in the receiving state all the time, when the ratio of the activation time of DRX and the overlapping time of the sensing window to the sensing window is less than 1, the first terminal device has less sensing results in the sensing window. For the terminal equipment that does not enter the DRX, the resource determined according to the sensing result has a high probability of resource conflict and a high probability of interference to other terminal equipment. When the ratio of the DRX activation time and the overlapping time of the sensing window to the sensing window is greater than the fifth threshold, it indicates that the sensing result can be trusted. Since the interference caused by the reduction of sensing results is limited, the sensing method can be used to determine the resource. When the ratio of the DRX activation time and the overlapping time of the sensing window to the sensing window is less than or equal to the fifth threshold, it means that the results determined by the sensing method are too few to guarantee the reliability of the resources determined by the sensing method, and the random selection method can be used to determine resource.

As a possible implementation, the sensing mode is sensing or partial sensing.

In this embodiment of the present application, the sensing manner may be sensing or partial sensing. A perception window is a continuous period of time. The partial sensing window can be a continuous period of time or a set of discontinuous time slots. When the first terminal device is in DRX, the perception result of perception or partial perception will decrease. Therefore, the probability of resource conflict in the resource determined according to the perception result increases, and the probability of interference to other terminal devices increases.

As a possible implementation manner, the first resource pool is used for the selection method at any time, and the second resource pool is used for the perception method, and the first resource pool is different from the second resource pool.

In the embodiment of the present application, the anytime selection mode has a dedicated resource pool, and does not share the resource pool with the sensing mode.

As a possible implementation manner, the fifth threshold is configured by the network device.

In this embodiment of the present application, the fifth threshold may be configured by a network device. When the network device is configured with the fifth threshold, the first terminal device can determine the resource selection mode according to the fifth threshold, and when the network device is not configured with the fifth threshold, the first terminal device determines the transmission resource by using the sensing mode.

A thirteenth aspect discloses a communication apparatus. The communication apparatus may be a second terminal device or a module (eg, a chip) in the second terminal device. The communication apparatus may include:

a sending unit, configured to send first indication information to the first terminal device, where the first indication information is used to trigger CSI reporting;

an activation unit for activating the first timer;

A monitoring unit, configured to monitor the PSCCH or the SCI within the activation time of the first timer.

As a possible implementation manner, the monitoring of the PSCCH or the SCI is used to receive a CSI report from the first terminal device.

As a possible implementation manner, the first PSSCH further includes CSI-RS.

As a possible implementation manner, the activation unit is specifically configured to activate the first timer at the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS , the M is an integer greater than or equal to 1.

As a possible implementation manner, the activation unit is specifically configured to activate the first PSSCH, the first indication information, or the Mth time slot after the time slot where the CSI-RS is located, to activate the first A timer, where M is an integer greater than or equal to 1.

As a possible implementation manner, the activation time of the first timer is less than or equal to the upper limit of the CSI reporting delay.

As a possible implementation manner, the activation unit is specifically configured to activate the first timer at the Nth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS , where N is an integer greater than the computation time of the CSI.

As a possible implementation manner, the activation unit is further configured to activate a second timer in the first symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS , the PSCCH or the SCI is not monitored during the activation time of the second timer.

As a possible implementation manner, the first indication information includes a second-level SCI, and the second-level SCI includes a CSI request field, where the CSI request field is used to trigger CSI reporting.

As a possible implementation manner, the communication device may further include:

A determining unit, configured to determine that the first timer expires when the CSI report from the first terminal device is received or the first timer expires.

A fourteenth aspect discloses a communication device, which can be a first terminal device, or a module (for example, a chip) in the first terminal device, and the communication device can include:

a receiving unit, configured to receive first indication information from the second terminal device, where the first indication information is used to trigger CSI reporting;

an activation unit for activating the third timer;

A sending unit, configured to send a CSI report to the second terminal equipment within the activation time of the third timer.

As a possible implementation manner, the sending unit is specifically used for:

During the activation time of the third timer, monitoring the PSCCH or the SCI, where the monitoring of the PSCCH or the SCI is used to determine the second PSSCH;

Sending the second PSSCH to the second terminal device, the second PSSCH including a CSI report.

As a possible implementation manner, the first PSSCH further includes CSI-RS.

As a possible implementation manner, the activation unit is specifically configured to activate a third timer at the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS , the M is an integer greater than or equal to 1.

As a possible implementation manner, the activation unit is specifically configured to activate the third time slot after the first PSSCH, the first indication information, or the Mth time slot after the time slot where the CSI-RS is located. A timer, where M is an integer greater than or equal to 1.

As a possible implementation manner, the activation unit is specifically configured to activate a third timer at the Nth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS , where N is an integer greater than the computation time of the CSI.

As a possible implementation manner, the activation unit is further configured to activate a fourth timer in the first symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS , the PSCCH or the SCI is not monitored during the activation time of the fourth timer.

A determining unit, configured to determine that the third timer expires when the CSI report is sent.

a generating unit, configured to generate a CSI report according to the CSI-RS.

A fifteenth aspect discloses a communication apparatus. The communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device, and the communication apparatus may include:

a receiving unit, configured to receive second indication information from a second terminal device, where the second indication information is used to trigger CSI reporting;

A sending unit, configured to send a third PSSCH to the second terminal device within the CSI reporting delay upper limit when the first terminal device is in DRX, where the third PSSCH includes a CSI report;

When there is an intersection between the upper limit of the CSI reporting delay and the activation time of the DRX, the time domain resource of the third PSSCH belongs to the intersection between the upper limit of the CSI reporting delay and the activation time of the DRX.

As a possible implementation manner, when there is no intersection between the upper limit of the CSI reporting delay and the activation time of the DRX, the resources of the third PSSCH are resources determined by random selection.

As a possible implementation manner, when there is an intersection between the upper limit of the CSI reporting delay and the activation time of the DRX, and the second ratio is greater than a seventh threshold, the resources of the third PSSCH are perceptual or partial The determined resource is sensed, and the second ratio is the ratio of the activation time of the DRX and the overlapping time of the sensing window to the sensing window.

As a possible implementation manner, when there is an intersection between the upper limit of the CSI reporting delay and the activation time of the DRX, and the second ratio is less than or equal to the seventh threshold, the resources of the third PSSCH are random The determined resource is selected, and the second ratio is the ratio of the activation time of the DRX and the overlapping time of the sensing window to the sensing window.

As a possible implementation manner, the fourth PSSCH further includes CSI-RS.

a generating unit, configured to generate a CSI report according to the CSI-RS.

As a possible implementation manner, the second indication information includes a second-level SCI, and the second-level SCI includes a CSI request field, where the CSI request field is used to trigger CSI reporting.

A sixteenth aspect discloses a communication apparatus. The communication apparatus may be a second terminal device or a module (eg, a chip) in the second terminal device. The communication apparatus may include:

A sending unit, configured to send a CSI report delay upper limit to the first terminal device, where the CSI report delay upper limit is greater than the sum of the sleep time of the DRX of the first terminal device and the calculation time of the CSI.

A seventeenth aspect discloses a communication apparatus. The communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. The communication apparatus may include:

A receiving unit, configured to receive a CSI report delay upper limit from the second terminal device, where the CSI report delay upper limit is greater than the sum of the sleep time of the first terminal device DRX and the CSI calculation time.

An eighteenth aspect discloses a communication apparatus. The communication apparatus may be a second terminal device, or may be a module (eg, a chip) in the second terminal device. The communication apparatus may include:

A sending unit, configured to send a first duration to the first terminal device, where the first duration is greater than or equal to the upper limit of the CSI reporting delay or the calculation time of the CSI, and the first duration is the duration of the inactive timer.

As a possible implementation manner, the sending unit is specifically configured to, when the overlap time between the upper limit of the CSI report delay and the activation time of the first terminal device DRX is less than the calculation time of the CSI, send a message to the first terminal device. The terminal device sends the first duration.

A nineteenth aspect discloses a communication apparatus. The communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device, and the communication apparatus may include:

A receiving unit, configured to receive a first duration from the second terminal device, where the first duration is greater than or equal to an upper limit of CSI reporting delay or a CSI calculation time, and the first duration is the duration of the inactive timer.

As a possible implementation manner, the receiving unit is specifically configured to, when the overlap time between the upper limit of the CSI reporting delay and the activation time of the period of the DRX of the first terminal device is less than the calculation time of the CSI, receive the data from the second terminal. The first duration of the device.

A twentieth aspect discloses a communication apparatus. The communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device, and the communication apparatus may include:

a receiving unit, configured to receive third indication information from the second terminal device, where the third indication information is used to trigger CSI reporting;

A sending unit, configured to send a CSI report to the second terminal device when the overlap length between the upper limit of the CSI report delay and the activation time of the DRX of the first terminal device is greater than or equal to the first time.

As a possible implementation manner, the first time is CSI calculation time, a first threshold, or a first ratio of the upper limit of the CSI reporting delay.

A processing unit, configured to determine not to report the CSI report when the overlapping length between the upper limit of the CSI reporting delay and the activation time is less than the first time, or switch the period of the DRX, and the switched DRX The overlapping length between the activation time and the upper limit of the CSI reporting delay is greater than or equal to the first time.

As a possible implementation manner, the receiving unit is specifically configured to receive the third indication information from the second terminal device and the value of the priority of the third indication information;

The period in which the processing unit switches the DRX includes:

When the value of the priority is smaller than the second threshold, the period of the DRX is switched.

As a possible implementation manner, the fifth PSSCH further includes CSI-RS.

a generating unit, configured to generate the CSI report according to the CSI-RS.

As a possible implementation manner, the third indication information includes a second-level SCI, and the second-level SCI includes a CSI request field, where the CSI request field is used to trigger CSI reporting.

A twenty-first aspect discloses a communication apparatus. The communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. The communication apparatus may include:

a receiving unit, configured to receive fourth indication information from the second terminal device, where the fourth indication information is used to trigger CSI reporting;

A switching unit, configured to switch the period of the DRX when the overlapping length of the upper limit of the CSI report delay and the activation time of the DRX of the first terminal device is less than the first time, and the activation time of the switched DRX and the CSI report delay The overlapping length between the upper limits is greater than or equal to the first time.

As a possible implementation manner, the receiving unit is specifically configured to receive fourth indication information and a priority value of the fourth indication information from the second terminal device;

The switching unit is specifically configured to switch the period of the DRX when the value of the priority is less than a third threshold.

A twenty-second aspect discloses a communication apparatus. The communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device, and the communication apparatus may include:

a receiving unit, configured to receive the first data packet from the second terminal device and the value of the priority of the first data packet;

A disabling unit, configured to disable DRX when the value of the priority is less than the fourth threshold.

A twenty-third aspect discloses a communication apparatus. The communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. The communication apparatus may include:

a receiving unit, configured to receive the second data packet from the second terminal device and the value of the priority of the second data packet;

An adjustment unit, configured to adjust the period of the DRX according to the value of the priority.

A twenty-fourth aspect discloses a communication apparatus. The communication apparatus may be a first terminal device, or may be a module (eg, a chip) in the first terminal device. The communication apparatus may include: a determining unit for when the first terminal When a terminal device is in DRX, the resource selection mode is determined according to a first ratio, where the first ratio is the ratio of the activation time of the DRX and the overlapping time of the sensing window to the sensing window; when the first ratio is greater than the fifth threshold , the resource selection mode is a perceptual mode, and when the first ratio is less than or equal to the fifth threshold, the resource selection mode is a random selection mode.

As a possible implementation manner, the sensing manner is sensing or partial sensing.

As a possible implementation manner, the selection method at any time uses a first resource pool, and the sensing method uses a second resource pool, and the first resource pool is different from the second resource pool.

As a possible implementation manner, the fifth threshold is configured by a network device.

A twenty-fifth aspect discloses a communication apparatus, where the communication apparatus may be a second terminal device or a module (eg, a chip) in the second terminal device. The communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device The other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the first aspect or any embodiment of the first aspect.

A twenty-sixth aspect discloses a communication apparatus, where the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. The communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device The other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the second aspect or any embodiment of the second aspect.

A twenty-seventh aspect discloses a communication apparatus, where the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. The communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device The other communication device outputs information, when the processor executes the computer program stored in the memory, the processor is caused to execute the communication method disclosed in the third aspect or any embodiment of the third aspect, or the processing The processor executes the communication method disclosed in the eighth aspect or any embodiment of the eighth aspect, or causes the processor to execute the communication method disclosed in the ninth aspect or any embodiment of the ninth aspect, or causes the processor to execute The communication method disclosed in the tenth aspect or any embodiment of the tenth aspect, or cause the processor to execute the communication method disclosed in the eleventh aspect or any embodiment of the eleventh aspect, or cause the processor to execute The communication method disclosed in the twelfth aspect or any embodiment of the twelfth aspect.

A twenty-eighth aspect discloses a communication apparatus, where the communication apparatus may be a second terminal device or a module (eg, a chip) in the second terminal device. The communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device The other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the fourth aspect or any one of the implementation manners of the fourth aspect.

A twenty-ninth aspect discloses a communication apparatus, where the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. The communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device The other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the fifth aspect or any one of the implementation manners of the fifth aspect.

A thirtieth aspect discloses a communication apparatus, where the communication apparatus may be a second terminal device or a module (eg, a chip) in the second terminal device. The communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device The other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the sixth aspect or any embodiment of the sixth aspect.

A thirty-first aspect discloses a communication apparatus, where the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. The communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device The other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the seventh aspect or any embodiment of the seventh aspect.

A thirty-second aspect discloses a communication system including the communication device of the twenty-fifth aspect and the communication device of the twenty-sixth aspect.

A thirty-third aspect discloses a communication system including the communication device of the twenty-eighth aspect and the communication device of the twenty-ninth aspect.

A thirty-fourth aspect discloses a communication system including the communication device of the thirty-eighth aspect and the communication device of the thirty-first aspect.

A thirty-fifth aspect discloses a computer-readable storage medium, where computer programs or computer instructions are stored thereon, and when the computer program or computer instructions are executed, the communication methods disclosed in the above aspects are implemented.

A thirty-sixth aspect discloses a chip including a processor for executing a program stored in a memory, and when the program is executed, the chip executes the above method.

As a possible implementation, the memory is located off-chip.

Description of drawings

1 is a schematic diagram of a network architecture of a 5G NR Uu port disclosed in an embodiment of the present application;

2 is a schematic diagram of a DRX cycle disclosed in an embodiment of the present application;

3 is a schematic diagram of communication between a terminal device and a terminal device disclosed in an embodiment of the present application;

4 is a schematic diagram of reporting a CSI report within the upper limit of the CSI report delay when a terminal device in a SL disclosed in the present application is in DRX;

5 is a schematic diagram of a network architecture disclosed in an embodiment of the present application;

FIG. 6 is a network architecture diagram of a V2X disclosed in an embodiment of the present application;

FIG. 7 is a schematic flowchart of a communication method disclosed in an embodiment of the present application;

8 is a schematic diagram of activation of a first timer disclosed in an embodiment of the present application;

9 is a schematic diagram of another first timer activation disclosed in an embodiment of the present application;

10 is a schematic diagram of a first timer and a second timer disclosed in an embodiment of the present application;

11 is a schematic diagram of a third timer and a fourth timer disclosed in an embodiment of the present application;

12 is a schematic flowchart of another communication method disclosed in an embodiment of the present application;

13 is a schematic diagram of an intersection between an upper limit of CSI reporting delay and an activation time of DRX disclosed by an embodiment of the present application;

14 is a schematic diagram showing that there is no intersection between an upper limit of CSI reporting delay and an activation time of DRX disclosed by an embodiment of the present application;

FIG. 15 is a schematic flowchart of another communication method disclosed by an embodiment of the present application;

16 is a schematic diagram of an upper limit of CSI reporting delay, the sleep time of the first terminal device DRX, and the calculation time of CSI disclosed in an embodiment of the present application;

FIG. 17 is a schematic flowchart of another communication method disclosed by an embodiment of the present application;

18 is a schematic diagram of a CSI reporting delay upper limit and a CSI calculation time disclosed in an embodiment of the present application;

FIG. 19 is a schematic flowchart of another communication method disclosed by an embodiment of the present application;

FIG. 20 is a schematic flowchart of another communication method disclosed by an embodiment of the present application;

FIG. 21 is a schematic flowchart of another communication method disclosed by an embodiment of the present application;

22 is a schematic flowchart of another communication method disclosed by an embodiment of the present application;

FIG. 23 is a schematic flowchart of another communication method disclosed by an embodiment of the present application;

FIG. 24 is a schematic structural diagram of a communication device disclosed in an embodiment of the present application;

FIG. 25 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 26 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 27 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 28 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 29 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 30 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 31 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 32 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 33 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 34 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 35 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 36 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

FIG. 37 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application;

38 is a schematic diagram of a sensing window in the dormant period of DRX disclosed by an embodiment of the present application;

39 is a schematic diagram of a sensing window disclosed in an embodiment of the present application in the activation period of DRX;

FIG. 40 is a schematic diagram of an overlap of a sensing window and an activation period of DRX disclosed in an embodiment of the present application;

FIG. 41 is a schematic diagram of another type of sensing window disclosed in an embodiment of the present application overlapping with the activation period of DRX.

detailed description

The embodiments of the present application disclose a communication method, an apparatus, and a computer-readable storage medium, which are used to ensure the reliability of CSI report transmission. Each of them will be described in detail below.

In order to better understand the embodiments of the present application, the following first describes application scenarios of the embodiments of the present application. Please refer to FIG. 1. FIG. 1 is a schematic diagram of a network architecture of a 5G new wireless (radio new, NR) Uu interface disclosed in an embodiment of the present application. As shown in FIG. 1 , the network architecture may include an access network device 101 and a terminal device 102 . The communication between the access network device 101 and the terminal device 102 includes downlink communication and uplink communication. Uplink communication is communication performed by uplink, and downlink communication is communication performed by downlink. In downlink communication, the access network device 101 sends downlink control signaling to the terminal device 102 through the PDCCH, and sends downlink data and paging to the terminal device 102 through a physical downlink shared channel (PDSCH). The terminal device 102 receives downlink control signaling from the network device 101 through the PDCCH, and receives downlink data and paging from the network device 101 through the PDSCH. The downlink control signaling may include downlink control information (downlink control information, DCI). The DCI may include parameters required for demodulation and decoding of the corresponding PDSCH.

Since the power consumption of the terminal equipment in the receiving state is relatively large, in 5G NR, in order to reduce the power consumption of the terminal equipment, DRX is introduced. Please refer to FIG. 2. FIG. 2 is a schematic diagram of a DRX cycle (cycle) disclosed in an embodiment of the present application. As shown in FIG. 2, the DRX cycle may include an active period and a dormant period. The length of the activation period may be referred to as the activation time, and may also be referred to as the on duration time. The length of the sleep period may be referred to as the sleep time. When the terminal device is in the active period of DRX, the terminal device can monitor the PDCCH reception information. When the terminal device is in the dormant period of DRX, the terminal device does not monitor the PDCCH.

The access network device can configure the DRX function for the terminal device, and the terminal device can monitor the PDCCH according to the DRX function. When the terminal device is in the radio resource control (RRC) connection state, if the DRX function is configured, the terminal device can perform discontinuous monitoring of all activated serving cells according to DRX rules; if the DRX function is not configured , the terminal device monitors the PDCCH according to the rules for monitoring the PDCCH.

The access network device controls the DRX of the terminal device by configuring the following parameters:

The DRX duration (drx-onDurationTimer) is a period of time starting in one DRX cycle, that is, the activation time corresponding to the activation period in FIG. 2 . The DRX duration may be a multiple of 1/32ms (subMilliSeconds). The DRX duration may also be ms (milliSecond). For example, ms1 means 1ms, ms2 means 2ms, and so on.

The DRX slot offset (drx-SlotOffset) is the delay before drx-onDurationTimer is enabled. The value of the DRX slot offset is in units of 1/32ms, 0 means 0ms, 1 means 1/32ms, 2 means 2/32ms, and so on.

The DRX inactivity time (drx-InactivityTimer) is the duration of monitoring the PDCCH after a new uplink (uplink, UL) or downlink (downlink, DL) is detected. The DRX inactive time is an integer multiple of 1ms. In the parameters of the RRC configuration, ms0 means 0ms, ms1 means 1ms, ms2 means 2ms, and so on.

DRX Retransmission DL (drx-RetransmissionDL) is the maximum duration for each DL hybrid automatic repeat request (HARQ) process until a DL retransmission is received. The value of the DRX retransmission DL is the number of time slots of the bandwidth part (BWP) of the received transport block (transport block, TB). Among them, sl0 corresponds to 0 time slot, sl1 corresponds to 1 time slot, and so on.

DRX Retransmission UL (drx-RetransmissionUL) is the maximum duration for each UL HARQ process until a UL retransmission is received. The value of the DRX retransmission UL is the number of time slots of the BWP in which the TB is transmitted. Among them, sl0 corresponds to 0 time slot, sl1 corresponds to 1 time slot, and so on.

The DRX long cycle start time slot (drx-LongCycleStartOffset) represents the long DRX cycle (long DRX cycle) and the DRX start time slot (drx-StartOffset). The DRX start slot is the start subframe of the DRX cycle. The long DRX cycle is in ms, and the DRX start time slot is an integer multiple of 1ms.

The value of the DRX short cycle (drx-ShortCycle) is ms level. ms1 means 1ms, ms2 means 2ms, and so on. The value of DRX long period should be a multiple of DRX short period. DRX short cycle is optional.

The DRX short cycle time (drx-ShortCycleTimer) is the duration for which the terminal device follows the DRX short cycle. The value of the DRX short cycle time is a multiple of the DRX short cycle. The DRX short cycle time value of 1 corresponds to drx-ShortCycle, the DRX short cycle time value of 2 corresponds to 2*drx-ShortCycle, and so on. DRX short cycle time is optional.

The DRX HARQ round trip time (RTT) time DL (drx-HARQ-RTT-TimerDL) is the minimum duration before the DL scheduling that the terminal device expects a HARQ retransmission for each DL HAEQ process. The DRX HARQRTT time DL is valued by the number of symbols in the BWP where the TB is received.

The DRX HARQ RTT Time UL (drx-HARQ-RTT-TimerUL) is the minimum duration before scheduling that the terminal device expects a UL HARQ retransmission for each UL HAEQ process. Takes the value by the number of symbols of the BWP in which the TB is transmitted.

When a DRX is configured, the activation time may include drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerDL or drx-RetransmissionTimerUL.

After the terminal device is configured with the DRX function, if a media access control (MAC) protocol data unit (PDU) is received in a configured downlink scheduling, the terminal device is carrying DL HARQ feedback. The first symbol after the end of the corresponding transmission starts the drx-HARQ-RTT-TimerDL of the corresponding HARQ process and stops the drx-RetransmissionTimerDL of the corresponding HARQ process. If a MAC PDU is sent in a configured uplink schedule, the terminal device starts the corresponding HARQ process in the first symbol after the first repetition of the corresponding physical uplink share channel (PUSCH) transmission ends. drx-HARQ-RTT-TimerUL, stop the drx-RetransmissionTimerUL of the corresponding HARQ process. If a drx-HARQ-RTT-TimerDL fails and the data of the corresponding HARQ process is not successfully decoded, the terminal device starts the drx-RetransmissionTimerDL of the corresponding HARQ process at the first symbol after the failure of the drx-HARQ-RTT-TimerDL. If a drx-HARQ-RTT-TimerUL fails, the terminal device starts the drx-RetransmissionTimerUL of the corresponding HARQ process in the first symbol after the drx-HARQ-RTT-TimerUL fails. If a DRX command MAC control element (control element, CE) or a long DRX command MAC CE is received, the terminal device stops drx-onDurationTimer, and stops drx-InactivityTimer. In the event that the drx-InactivityTimer expires or a DRX command MAC CE is received, if the short DRX cycle is configured, the terminal device will be the first symbol after the DRX command MAC CE is received or the first symbol after the drx-InactivityTimer has expired. Symbol starts or restarts the drx-ShortCycleTimer, using the short DRX cycle, otherwise using the long DRX cycle. If the drx-ShortCycleTimer fails, the terminal device uses the long DRX cycle. If a long DRX command MAC CE is received, the terminal device stops the drx-ShortCycleTimer and uses the long DRX cycle. If short DRX cycle is used and [(subframe number (SFN)×10)+SFN]mod(drx-ShortCycle)=(drx-StartOffset)mod(drx-ShortCycle), or if long DRX cycle is used , and [(SFN×10)+SFN]mod(drx-LongCycle)=drx-StartOffset, then the terminal device starts drx-onDurationTimer after the start of drx-SlotOffset of a subframe. If the terminal device is in the active period of DRX, the terminal device monitors the PDCCH. If the terminal device is in the active period of DRX, and the PDDCH indicates a DL transmission, the terminal device starts the drx-HARQ-RTT-TimerDL of the corresponding HARQ process in the first symbol after the end of the corresponding transmission carrying the DL HARQ feedback, and stops the corresponding HARQ process. drx-RetransmissionTimerDL for the HARQ process. If the terminal device is in the active period of DRX and the PDCCH indicates a UL transmission, the terminal device starts the drx-HARQ-RTT-TimerUL of the corresponding HARQ process in the first symbol after the first repetition of the corresponding PUSCH transmission ends, and stops the corresponding HARQ process. drx-RetransmissionTimerUL for the HARQ process. If the terminal device is in the active period of DRX and the PDCCH indicates a new transmission (DL or UL), the terminal device starts or restarts the drx-InactivityTimer in the first symbol after PDCCH reception.

The access network device can activate/deactivate DRX in the terminal device through parameter configuration of the RRC layer.

Please refer to FIG. 3 , which is a schematic diagram of communication between a terminal device and a terminal device disclosed in an embodiment of the present application. As shown in Figure 3, communication between terminal devices can be performed through SL. Communication between terminal devices is carried out through PSSCH and PSCCH. The PSCCH can carry control information such as the first-level SCI, and the PSSCH can carry the second-level SCI, reference signals, data, and the like.

Two resource allocation modes are defined in NR vehicle to everything (V2X). Mode 1: The access network device schedules the SL transmission resources to be used by the terminal device, that is, when the terminal device needs to send data, the terminal device needs to request resources from the access network device, and the access network device responds to the request of the terminal device. Allocate resources to it. Mode 2: The terminal device determines the SL transmission resource in the SL resource pool configured by the network device or the pre-configured SL resource pool, that is, the terminal device can determine the SL transmission resource by sensing, that is, the terminal device can decode other terminals by decoding the SL transmission resources. The SCI of the device or the SL measurement is performed to obtain information on the resource occupation of other terminal devices, and the SL transmission resources are determined based on the resources in the resource pool, the resources occupied by other terminal devices, and the SL measurement result. The SL measurement is based on the value of the reference signal receiving power (RSRP) of the corresponding SL demodulation reference signal (DMRS) when decoding the SCI. A resource pool is a collection of time-frequency resources. The terminal device works in a resource pool, that is, in the mode 2, the terminal device can select a resource to send data and/or receive data in the resource pool in a perceptual manner.

It can be seen from the above analysis that DRX has been introduced into the NR Uu port, but DRX has not been introduced into the SL. However, since the Uu port is the communication between the terminal device and the access network device, the access network device does not need to be in DRX, and the terminal device can be in DRX. In SL, both the sending terminal device and the receiving terminal device may be in DRX. In addition, in the NR Uu port, when the terminal device is in DRX, the resources used by the terminal device to transmit the CSI report are scheduled by the access network device. In SL, when the terminal device is in DRX, how to determine the resource for transmitting the CSI report has become an urgent technical problem to be solved. Please refer to FIG. 4. FIG. 4 is a schematic diagram of reporting a CSI report within the upper limit of the CSI reporting delay when a terminal device in an SL disclosed in the present application is in DRX. As shown in Figure 4, the terminal device receives the information used to trigger CSI reporting at time T1. It can be seen that a part of the CSI reporting delay upper limit is in the active period of DRX, and the other part of the CSI reporting delay upper limit is in the dormant period of DRX. However, the first terminal device cannot determine the resource used for reporting CSI in a perceptual manner during the dormant period of DRX. It can be seen that after DRX is introduced in SL, the terminal device cannot use the existing CSI report reporting rules for reporting. Therefore, when the terminal device is in DRX, how to report the CSI report has become an urgent technical problem to be solved. Since the terminal device is in DRX, after CSI reporting is triggered, it may be unable to receive the reported CSI report due to being in a dormant state. How to receive the report of the CSI report is also referred to as a technical problem to be solved urgently.

In order to better understand a communication method, an apparatus, and a computer-readable storage medium disclosed in the embodiments of the present application, the network architecture used in the embodiments of the present application is first described below. Please refer to FIG. 5. FIG. 5 is a schematic diagram of a network architecture disclosed in an embodiment of the present application. As shown in FIG. 5 , the network architecture may include terminal device 1 and terminal device 2 . The terminal device 1 and the terminal device 2 can communicate through SL. The terminal device 1 and/or the terminal device 2 can act as a transmitter to send information, and can also act as a receiver to receive information. Terminal device 1 and/or terminal device 2 may be in DRX.

For example, please refer to FIG. 6, which is a network architecture diagram of a vehicle to everything (V2X) disclosed in an embodiment of the present application. As shown in Figure 6, V2X can include vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-infrastructure (V2I) communication, Communication with the vehicle to network (V2N).

It should be understood that the terminal device 1 and the terminal device 2 may be the same device or different devices.

It should be understood that the network architecture shown in FIG. 6 is only an exemplary illustration of the network device shown in FIG. 5 , and does not constitute a limitation thereto.

It should be understood that the network architecture shown in FIG. 6 is only an exemplary illustration, and does not constitute a limitation.

Terminal equipment, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice and/or data connectivity to users. equipment. The terminal device can be a handheld terminal, a notebook computer, a subscriber unit, a cellular phone, a smart phone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer , wireless modem (modem), handheld device (handheld), laptop computer (laptop computer), cordless phone (cordless phone) or wireless local loop (wireless local loop, WLL) station, machine type communication (machine type communication, MTC) terminals, wearable devices (such as smart watches, smart bracelets, pedometers, etc.), in-vehicle devices (such as cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed rail, etc.), virtual reality (virtual reality, VR) equipment, augmented reality (AR) equipment, wireless terminals in industrial control (industrial control), smart home equipment (for example, refrigerators, TVs, air conditioners, electricity meters, etc.), intelligent robots, workshop equipment, unmanned driving Wireless terminals in (self driving), wireless terminals in remote medical surgery, wireless terminals in smart grid, wireless terminals in transportation safety, in smart city wireless terminals, or wireless terminals in smart homes, flying devices (eg, smart robots, hot air balloons, drones, airplanes), or other devices that can communicate.

Based on the above network architecture, please refer to FIG. 7 , which is a schematic flowchart of a communication method disclosed in an embodiment of the present application. As shown in FIG. 7 , the communication method may include the following steps. The functions performed by the terminal device in the following steps may also be performed by a module (for example, a chip) in the terminal device.

701. The second terminal device sends first indication information to the first terminal device.

Correspondingly, the first terminal device receives the first indication information from the second terminal device.

When the second terminal device has a service requirement, the second terminal device may send the first indication information to the first terminal device. The first indication information is used to trigger CSI reporting, and it can be understood that the first indication information has a function of triggering the first terminal device to report the CSI report to the second terminal device.

In an implementation manner, the first indication information may be carried on the first PSSCH, and it can be understood that the first indication information may be transmitted through the physical sideline shared channel. In one case, the first indication information may include a second-level SCI, and the second-level SCI may include a CSI request field, where the CSI request field is used to trigger CSI reporting. The value of the CSI request field may be 1 or 0, which is not limited here. In another case, the first PSSCH may include a second-level SCI, the second-level SCI may include a CSI request field, and the first indication information may be a CSI request field. In yet another case, the first indication information may be an indicator in the first PSSCH. In yet another case, the first indication information may be a reference signal in the first PSSCH, and the reference signal may be CSI-RS or the like. In yet another case, the first indication information may be one bit in the first PSSCH. For example, when this bit is 0 or 1, it is used to trigger the reporting of CSI. It should be understood that the above limitation on the first indication information is only an exemplary description, and does not constitute a limitation on the first indication information, and the first indication information can be any form of information, fields, bits, signaling, news etc.

Optionally, when the first indication information is carried on the first PSSCH, the first PSSCH may further include CSI-RS.

In another implementation manner, the first indication information may also be carried on the PSCCH.

Optionally, when the first indication information is carried on the PSCCH, the second terminal device may also send the PSSCH carrying the CSI-RS to the first terminal device.

702. The second terminal device activates the first timer.

703. The second terminal device monitors the PSCCH or the SCI within the activation time of the first timer.

When the second terminal device is in DRX, after the second terminal device sends the first indication information to the first terminal device, the first timer may be activated. The first timer may be a fixed timer, and the time of the timer may be fixed. Therefore, activating the first timer may be understood as starting the first timer, or may be understood as starting the first timer to count. The first timer can be a fixed timer, but the time of this timer can be set as required. Therefore, when the time of the first timer is not the required time, activating the first timer can be understood as setting the first timer the activation time of the device and start the first timer. The first timer may also be a variable timer. Therefore, activating the first timer may be understood as determining the first timer and starting the first timer. When the determined time of the first timer is not the required time, the activation time of the first timer may be set first, and then the first timer is started. In addition, when the timer does not exist, the first timer needs to be created first. The time when the first timer is started may be 0, or may be the activation time. When the time when the first timer is started is 0, the timing of the first timer can be understood as the time of the timer increases continuously with the change of time until the timer expires. When the time when the first timer is started is the activation time, the timing of the first timer may be understood as the time of the timer decreases continuously with the change of time until the timer expires. It should be understood that the above description of the first timer is only exemplary, and does not constitute a limitation on the first timer. The activation time of the timer can be understood as the longest time that the timer can count and work. For example, for a 5s timer, 5s is the activation time of the timer. When the timer starts from 0 and the timer reaches 5s, the timer will stop timing, that is, the timer will stop. To make the timer count again, you need to restart the timer, or enable the timer.

When the terminal device is in DRX, it can be understood that the terminal device is configured with the DRX function, it can also be understood that the terminal device is enabled with DRX, and it can also be understood that the terminal device has the DRX function, which is not limited here.

In an implementation manner, the second terminal device may activate the first timer at the Mth symbol after the end symbol of the first indication information, which can be understood as activating the first timer at the Mth symbol after the first indication information is sent A timer can also be understood as activating the first timer at the Mth symbol after the last symbol of the first indication information is sent. M is an integer greater than or equal to 1. It can be seen that the second terminal device can activate the first timer at the first symbol after the end symbol of the first indication information, or activate the first timer at the second symbol after the end symbol of the first indication information, and further The first timer may be activated at the third symbol after the end symbol of the first indication information. When M is equal to 1, the second terminal device can activate the first timer at the first symbol after the end symbol of the first indication information. Since the first indication information is used to trigger CSI reporting, the second terminal device is sending the The first timer is activated after the indication information of the CSI report is triggered, so as to receive the CSI report. The probability of receiving the CSI report is improved, the normal operation of the link adaptation is ensured, and the system performance and the system communication efficiency are improved. Please refer to FIG. 8 , which is a schematic diagram of activating a first timer disclosed in an embodiment of the present application. As shown in FIG. 8 , the time when the first timer is activated is T1, the time when the first timer is invalid is T2, and the second terminal device keeps monitoring during the working time of the first timer.

The second terminal device may also activate the first timer at the Mth time slot after the time slot where the first indication information is located, which may be understood as activating the first timer at the Mth time slot after the first indication information, or It can be understood that the first timer is activated in the Mth time slot after the first indication information is sent, and it can also be understood that the first timer is activated in the Mth time slot after the last symbol of the first indication information is sent, It can also be understood that the first timer is activated in the Mth time slot after the end symbol of the first indication information. When M is equal to 1, the second terminal device can activate the first timer in the first time slot after the time slot where the first indication information is located. Since the first indication information is used to trigger CSI reporting, the second terminal device is in The first time slot after sending the first indication information activates the first timer, so as to receive the CSI report, from the end symbol of the first indication information to the start of the first time slot after the time slot where the first indication information is located Within the time interval of the symbol, the second terminal device can process the inactive time. The system performance and system communication efficiency are improved, which is more conducive to the power saving of the second terminal device, avoids unnecessary power consumption, and the terminal device is simpler to implement.

When the first indication information is carried on the first PSSCH, the second terminal device may also activate the first timer at the Mth symbol after the end symbol of the first PSSCH, which can be understood as the first timer after the first PSSCH is sent. M symbols activate the first timer, which can also be understood as activating the first timer at the Mth symbol after the last symbol of the first PSSCH is sent. When M is equal to 1, the second terminal device can activate the first timer at the first symbol after the end symbol of the first PSSCH. Since the PSSCH carries the indication information for triggering CSI reporting, the second terminal device is sending The first timer is activated after the indication information for triggering the CSI report, so as to receive the CSI report. The probability of receiving the CSI report is improved, the normal operation of the link adaptation is ensured, and the system performance and the system communication efficiency are improved. For the description that the second terminal device activates the first timer at the Mth symbol after the end symbol of the first PSSCH, you can refer to the above description that the second terminal device activates the first timer at the Mth symbol after the end symbol of the first indication information The description of the device will not be repeated here.

When the first indication information is carried on the first PSSCH, the second terminal device may also activate the first timer at the Mth time slot after the time slot where the first PSSCH is located, which can be understood as the first timer after the first PSSCH. M timeslots activate the first timer, which can also be understood as activating the first timer in the Mth timeslot after the first PSSCH is sent, and can also be understood as the Mth time slot after the last symbol of the first PSSCH is sent. The time slot activates the first timer, which can also be understood as activating the first timer at the Mth time slot after the end symbol of the first indication information. For the description that the second terminal device activates the first timer in the Mth time slot after the time slot where the first PSSCH is located, you can refer to the Mth time slot after the time slot where the first indication information is located by the second terminal device above. The description of activating the first timer will not be repeated here.

When the first PSSCH includes CSI-RS, the second terminal device may also activate the first timer at the Mth symbol after the end symbol of the CSI-RS, which can be understood as the Mth symbol after the CSI-RS is sent Activating the first timer can also be understood as activating the first timer at the Mth symbol after the last symbol of the CSI-RS is sent. When M is equal to 1, the second terminal device can activate the first timer at the 1st symbol after the end symbol of the CSI-RS, since the CSI-RS can be used to generate a CSI report, and the transmission of the CSI-RS is accompanied by The sending of the indication information for triggering the CSI report is triggered, and the second terminal device activates the first timer after sending the indication information for triggering the CSI report, so as to receive the CSI report. The probability of receiving the CSI report is improved, the normal operation of the link adaptation is ensured, and the system performance and the system communication efficiency are improved. For the description that the second terminal device activates the first timer at the Mth symbol after the end symbol of the CSI-RS, you can refer to the above description that the second terminal device activates the first timer at the Mth symbol after the end symbol of the first indication information The description of the device will not be repeated here.

When the first PSSCH includes CSI-RS, the second terminal device may also activate the first timer at the Mth time slot after the time slot where the CSI-RS is located, which can be understood as the Mth time after the CSI-RS Slot activation of the first timer can also be understood as the activation of the first timer in the Mth time slot after the CSI-RS is sent, and it can also be understood as activation in the Mth time slot after the last symbol of the CSI-RS is sent The first timer can also be understood as activating the first timer in the Mth time slot after the end symbol of the CSI-RS is sent. For the description that the second terminal device activates the first timer in the Mth time slot after the time slot where the CSI-RS is located (ie, the end time slot), you can refer to the above description of the second terminal device after the time slot where the first indication information is located. The description of activating the first timer in the Mth time slot of , will not be repeated here.

Afterwards, the second terminal device may monitor the PSCCH or the SCI within the activation time of the first timer, and the purpose of monitoring the PSCCH or the SCI is to receive a CSI report from the first terminal device. During the activation time of the first timer, the second terminal device may also receive other information from the first terminal device, and may also receive information from other terminal devices, which is not limited herein. It can be seen that the second terminal device monitors the PSCCH or SCI within the activation time of the first timer so as not to miss the CSI report returned by the first terminal device, and can perform link adaptation, thereby improving link quality and transmission reliability . Monitoring can be understood as receiving, also can be understood as detection, can also be understood as blind detection. Monitoring the SCI can be understood as monitoring the first-level SCI, it can also be understood as monitoring the first-level SCI and the second-level SCI, and it can also be understood as monitoring the first-level SCI and receiving the corresponding second-level SCI.

Since the channel state information changes with time, the time interval between triggering the CSI report and receiving the CSI report cannot be too long, otherwise the CSI report will lose its timeliness. The upper limit of the CSI report delay is the maximum time limit for ensuring the timeliness of the CSI report. After exceeding this time limit, it indicates that the information delay is relatively large, the CSI report will lose the timeliness, and the first terminal device may not return CSI. Therefore, in order to reduce the listening time of the second terminal device so as to reduce the power consumption of the second terminal device, the activation time of the first timer cannot be too long. It can be seen that the activation time of the first timer can be determined according to the upper limit of the CSI report delay, which can be understood as the determination of the activation time of the first timer needs to consider the upper limit of the CSI report delay. For example, the activation time of the first timer may be less than or equal to the upper limit of the CSI reporting delay. In order not to miss the CSI report returned by the first terminal device, the smaller the difference between the activation time of the first timer and the upper limit of the CSI report delay, the better, but the smaller the difference, the greater the power consumption. In addition, since the first terminal device needs to generate the CSI report after receiving the first indication information that triggers the CSI report, and it takes a period of time to generate the CSI report, the second terminal device will not receive information from the first terminal during this time. CSI report for the device. Therefore, in order not to miss the CSI report returned by the first terminal device, the activation time of the first timer cannot be too short. It can be seen that the determination of the activation time of the first timer may also consider the calculation time of the CSI. For example, the activation time of the first timer may be greater than or equal to the calculation time of the CSI. Therefore, the activation time of the first timer is preferably greater than or equal to the calculation time of the CSI, and less than or equal to the upper limit of the CSI reporting delay. The upper limit of CSI reporting delay may be configured through PC5RRC. The calculation time of the CSI may be reported by the first terminal device. The calculation time of the CSI may be determined by the first terminal device according to the capability of the first terminal device. For example, there may be multiple CSI calculation times, and the first terminal device may select a corresponding CSI calculation time from the multiple CSI calculation times according to its own capability information. The foregoing manner of determining the calculation time of the CSI is only an exemplary description, and does not constitute a limitation, and may also be determined in other manners, which are not limited herein.

It can be understood that the above example of determining the activation time of the first timer according to the upper limit of the CSI reporting delay is only an exemplary illustration, and does not constitute a limitation.

In another implementation manner, the second terminal device may activate the first timer at the Nth symbol after the end symbol of the first indication information, which can be understood as the Nth symbol after the first indication information is sent Activating the first timer can also be understood as activating the first timer at the Nth symbol after the last symbol of the first indication information is sent. N is an integer greater than the computation time of CSI. The unit of the CSI calculation time may be a symbol, or the unit of absolute time milliseconds, seconds, etc., or it may be determined by other means of measuring time, which is not limited herein. It can be seen that the second terminal device can activate the first timer at the first symbol after the end symbol of the first indication information after the calculation time of CSI, or after the end symbol of the first indication information and after the calculation time of CSI The first timer is activated at the second symbol of the first indicator, and the first timer may also be activated at the third symbol after the CSI calculation time has elapsed after the end symbol of the first indication information. For example, the calculation time of the CSI is 4 symbols, and the first timer is activated at the second symbol after the end symbol of the first indication information and after the calculation time of the CSI, which can be understood as the time after the end symbol of the first indication information. The sixth symbol activates the first timer. Since the first terminal device may have generated a CSI report after the CSI-th calculation time symbol after the first indication information end symbol, the first terminal device may have generated the CSI report at the first indication information end symbol after the CSI-th calculation time The symbol can return a CSI report to the second terminal device. Therefore, in order not to miss the CSI report returned by the first terminal device, the second terminal device passes the CSI calculation time of 1 after the end symbol of the first indication information. Activating the first timer with a symbol works best. Since the first terminal device needs time to generate the CSI report after receiving the indication information for triggering the CSI report, the CSI calculation time is the shortest time for generating the CSI report after receiving the signaling information for triggering the CSI report. During this period of time, the second terminal will not receive the CSI report, so being in an active state is meaningless and is not conducive to energy saving. Please refer to FIG. 9 . FIG. 9 is a schematic diagram of another first timer activation disclosed in an embodiment of the present application. As shown in FIG. 9 , T3 is the time when the second terminal device triggers CSI reporting, T4 is the time when the first timer is activated, and T5 is the time when the first timer expires. It can be seen that the first timer is activated after the calculation time of CSI after CSI reporting is triggered.

The second terminal device may also activate the first timer in the Lth time slot after the first symbol. L is an integer greater than or equal to 1. The first symbol may be the Kth symbol after the last symbol of the first indication information is sent, which may be understood as the Kth symbol after the end symbol of the first indication information. K is the number of symbols used to calculate CSI, that is, the number of symbols used to calculate CSI. For example, assuming that L is 1, when the symbol used for calculating the CSI is the number of symbols included in a time slot, the first timer is activated in the Lth time slot after the time slot where the first symbol is located, which can be understood as the first indication information The second time slot after the end symbol of , activates the first timer. Since the first terminal device has generated the CSI report in K symbols after the first indication information end symbol, the first terminal device can return the CSI report to the second terminal device in the first time slot after the first symbol. Therefore, In order not to miss the CSI report returned by the first terminal device, the second terminal device can activate the first timer in the first time slot after the first symbol, which can reduce the listening time of the second terminal device, thereby reducing the time of the second terminal device. The power consumption of the device.

When the first indication information is carried on the first PSSCH, the second terminal device may also activate the first timer at the Nth symbol after the end symbol of the first PSSCH, which can be understood as the first timer after the first PSSCH is sent. N symbols activate the first timer, which can also be understood as activating the first timer at the Nth symbol after the last symbol of the first PSSCH is sent. For the description that the second terminal device activates the first timer at the Nth symbol after the end symbol of the first PSSCH, you can refer to the above description that the second terminal device activates the first timer at the Nth symbol after the end symbol of the first indication information The description of the device will not be repeated here.

When the first indication information is carried on the first PSSCH, the first symbol may be the K th symbol after the last symbol of the first PSSCH is sent, that is, the K th symbol after the end symbol of the first PSSCH. For a detailed description, reference may be made to the related description that the first symbol is the Kth symbol after the last symbol of the first indication information is sent, and details are not repeated here.

When the first PSSCH includes CSI-RS, the second terminal device may also activate the first timer at the Nth symbol after the end symbol of the CSI-RS, which can be understood as the Nth symbol after the CSI-RS is sent Activating the first timer can also be understood as activating the first timer at the Nth symbol after the last symbol of the CSI-RS is sent. For the description that the second terminal device activates the first timer at the Nth symbol after the end symbol of the CSI-RS, you can refer to the above description that the second terminal device activates the first timer at the Nth symbol after the end symbol of the first indication information The description of the device will not be repeated here.

When the first PSSCH includes CSI-RS, the first symbol may be the K th symbol after the last symbol of the CSI-RS is transmitted, that is, the K th symbol after the CSI-RS end symbol. For a detailed description, reference may be made to the related description that the first symbol is the Kth symbol after the last symbol of the first indication information is sent, and details are not repeated here.

Since the first terminal device needs to generate the CSI report after receiving the first indication information triggering the CSI report, and it takes a period of time to generate the CSI report, the first terminal device will not send the CSI report during this time. Correspondingly, the second terminal device will not receive the CSI report either. In addition, since the first timer may be activated at the Nth symbol after the first indication information, the first PSSCH or the CSI-RS end symbol, and N is an integer greater than the calculation time of CSI, the calculation time of CSI is considered . The first timer may also be activated in the Lth time slot after the first symbol, and the first symbol takes into account the calculation time of CSI. Therefore, the activation time of the first timer may be determined according to the upper limit of CSI reporting delay and the calculation time of CSI. For example, the activation time of the first timer may be less than or equal to the difference between the upper limit of CSI reporting delay and the calculation time of CSI value, so that it can be ensured that the monitoring is performed within the upper limit of the CSI reporting delay, unnecessary monitoring can be reduced, and the power consumption of the second terminal device can be reduced.

It can be understood that the above example of determining the activation time of the first timer according to the upper limit of the CSI reporting delay and the calculation time of the CSI is only an exemplary illustration, and does not constitute a limitation.

Optionally, when the second terminal device activates the first timer at the Nth symbol after the first indication information, the end symbol of the first PSSCH or CSI-RS, or at the Lth time slot after the first symbol During the first timer, there is a period of time between when the second terminal device sends the first indication information and activates the first timer. During this period, if the second terminal device is in the active period of DRX, the second terminal device also needs to monitor the PSCCH or the SCI. Therefore, in order for the second terminal device not to perform monitoring during this period to reduce the power consumption of the second terminal device, the second terminal device The second timer is activated for every symbol, or the second timer may be activated in the Lth time slot after the first symbol, and the PSCCH or the SCI is not monitored during the activation time of the second timer. The activation time of the second timer may be greater than or equal to the calculation time of the CSI. The time when the second timer expires may be the time at which the first timer is activated, or may be earlier than the time at which the first timer is activated. The second timer expires when the second timer expires. Please refer to FIG. 10. FIG. 10 is a schematic diagram of a first timer and a second timer disclosed in an embodiment of the present application. As shown in FIG. 10 , T6 is the time when the second timer is activated, T7 is the time when the first timer is activated and the time when the second timer is invalid, and T8 is the time when the first timer is invalid. In FIG. 10 , the time when the second timer expires is the time when the first timer is activated.

The activation time of the above-mentioned first timer may be pre-configured, may also be configured by a network device, or may be determined in other ways, which are not limited herein.

704. The first terminal device activates a third timer.

705. The first terminal device sends a CSI report to the second terminal device within the activation time of the third timer.

After receiving the first indication information from the second terminal device, the first terminal device may activate a third timer, and send a CSI report to the second terminal device within the activation time of the third timer.

Accordingly, the second terminal device receives the CSI report from the first terminal device.

The first terminal device sends a CSI report to the second terminal device within the activation time of the third timer, which can be understood as the first terminal device monitoring the PSCCH or SCI within the activation time of the third timer, so that the first terminal device can detect The transmission resource, that is, the transmission resource of the second PSSCH, is determined in a partially perceptual manner, and a CSI report is sent to the second terminal device. When the activation time of the third timer is greater than or equal to the sensing window, the first terminal device can determine the transmission resource through sensing; when the activation time of the third timer is less than the sensing window, the first terminal device can determine the transmission resource through partial sensing transfer resources. Monitoring the SCI can be understood as monitoring the first-level SCI, it can also be understood as monitoring the first-level SCI and the second-level SCI, and it can also be understood as monitoring the first-level SCI and receiving the corresponding second-level SCI.

In an implementation manner, after receiving the first indication information, the first terminal device may immediately trigger CSI reporting according to the first indication information. Correspondingly, the first terminal device may activate the third timer at the Mth symbol after the end symbol of the first indication information, which can be understood as activating the third timer at the Mth symbol after the first indication information is received, It can also be understood that the third timer is activated at the Mth symbol after the last symbol of the first indication information is received. The description that the first terminal device activates the third timer at the Mth symbol after the end symbol of the first indication information can refer to the above description that the second terminal device activates the first timer at the Mth symbol after the end symbol of the first indication information. The description of the timer will not be repeated here.

The first terminal device may also activate the third timer in the Mth time slot after the time slot where the first indication information is located, which can be understood as activating the third timer in the Mth time slot after the first indication information, It can also be understood that the third timer is activated in the Mth time slot after the first indication information is received, and it can also be understood that the third timer is activated in the Mth time slot after the last symbol of the first indication information is received, It can also be understood that the third timer is activated in the Mth time slot after receiving the end symbol of the first indication information. For the description that the first terminal device activates the third timer at the Mth time slot after the time slot where the first indication information is located, you can refer to the above description that the second terminal device activates the third timer at the Mth time slot after the time slot where the first indication information is located. The description of the slot activation first timer will not be repeated here.

When the first indication information is carried on the first PSSCH, the first terminal device may also trigger CSI reporting according to the first indication information after receiving the first PSSCH carrying the first indication information. Correspondingly, the first terminal device can also activate the third timer at the Mth symbol after the end symbol of the first PSSCH, which can be understood as activating the third timer at the Mth symbol after the first PSSCH is received, and also It can be understood that the third timer is activated at the Mth symbol after the last symbol of the first PSSCH is received. For the description that the first terminal device activates the third timer at the Mth symbol after the end symbol of the first PSSCH, you can refer to the above description that the second terminal device activates the first timing at the Mth symbol after the end symbol of the first indication information The description of the device will not be repeated here.

The first terminal device may also activate the third timer at the Mth time slot after the time slot where the first PSSCH is located, which can be understood as activating the third timer at the Mth time slot after the first PSSCH, which can also be understood In order to activate the third timer in the Mth time slot after the first PSSCH is received, it can also be understood that the third timer is activated in the Mth time slot after receiving the last symbol of the first PSSCH, which can also be understood as The third timer is activated in the Mth time slot after receiving the end symbol of the first indication information. For the description that the first terminal device activates the third timer in the Mth time slot after the time slot where the first PSSCH is located, you can refer to the Mth time slot after the time slot where the first indication information is located by the second terminal device above. The description of activating the first timer will not be repeated here.

When the first PSSCH includes the CSI-RS, the first terminal device may receive the first indication information first, and then receive the CSI-RS. The first terminal device may also trigger CSI reporting according to the first indication information after receiving the CSI-RS. Correspondingly, the first terminal device may also activate the third timer at the Mth symbol after the end symbol of the CSI-RS, which can be understood as activating the third timer at the Mth symbol after the CSI-RS is received, and also It can be understood that the third timer is activated at the Mth symbol after the last symbol of the CSI-RS is received. For the description that the first terminal device activates the third timer at the Mth symbol after the end symbol of the CSI-RS, you can refer to the above description that the second terminal device activates the first timing at the Mth symbol after the end symbol of the first indication information The description of the device will not be repeated here.

The first terminal device may also activate the third timer at the Mth time slot after the time slot where the CSI-RS is located, which can be understood as activating the third timer at the Mth time slot after the CSI-RS, which can also be understood To activate the third timer in the Mth time slot after receiving the CSI-RS, it can also be understood as activating the third timer in the Mth time slot after receiving the last symbol of the CSI-RS, which can also be understood as The third timer is activated in the Mth slot after the end symbol of the CSI-RS is received. For the description that the first terminal device activates the third timer in the Mth time slot after the time slot where the CSI-RS is located, you can refer to the Mth time slot after the time slot where the first indication information is located by the second terminal device above. The description of activating the first timer will not be repeated here.

The activation time of the third timer may be determined according to the upper limit of the CSI reporting delay. For example, the activation time of the third timer may be less than or equal to the upper limit of the CSI reporting delay. For the description of the activation time of the third timer, reference may be made to the description of the activation time of the first timer in an implementation manner below in step 703, and details are not repeated here. It can be understood that the above example of determining the activation time of the third timer according to the upper limit of the CSI reporting delay is only an exemplary illustration, and does not constitute a limitation.

In another implementation manner, since the first terminal device needs to generate the CSI report after receiving the first indication information, and it takes a period of time to generate the CSI report, the first terminal device will not send the CSI report during this time. Therefore, when the first terminal device can generate a CSI report according to the first indication information after receiving the first indication information, the first terminal device can activate the third timer at the Nth symbol after the end symbol of the first indication information , it can be understood that the third timer is activated at the Nth symbol after the first indication information is received, and it can also be understood that the third timer is activated at the Nth symbol after the last symbol of the first indication information is received. For the description that the first terminal device activates the third timer at the Nth symbol after the end symbol of the first indication information, you can refer to the above description that the second terminal device activates the first timer at the Nth symbol after the end symbol of the first indication information. The description of the timer will not be repeated here.

The first terminal device may also activate the third timer in the Lth time slot after the first symbol. The first symbol may be the K th symbol after the last symbol of the first indication information is sent, that is, the K th symbol after the end symbol of the first indication information. The first terminal device activates the third timer in the Lth time slot after the first symbol. You can refer to the description that the first terminal device activates the first timer in the Lth time slot after the first symbol. Add elaboration.

When the first indication information is carried on the first PSSCH, the first terminal device may generate a CSI report according to the first indication information after receiving the first PSSCH carrying the first indication information. Considering the time required for CSI report generation, that is, the calculation time of CSI. The first terminal device may also activate the third timer at the Nth symbol after the end symbol of the first PSSCH, which can be understood as activating the third timer at the Nth symbol after the first PSSCH is received, which can also be understood as The third timer is activated at the Nth symbol after the reception of the last symbol of the first PSSCH. For the description that the first terminal device activates the third timer at the Nth symbol after the end symbol of the first PSSCH, you can refer to the above description that the second terminal device activates the first timing at the Nth symbol after the end symbol of the first indication information The description of the device will not be repeated here.

When the first indication information is carried on the first PSSCH, the first symbol may be the Kth symbol after the last symbol of the first PSSCH is sent, that is, the Kth symbol after the end symbol of the first PSSCH. For a detailed description, reference may be made to the related description that the first symbol is the Kth symbol after the last symbol of the first indication information is sent, and details are not repeated here.

When the first PSSCH includes the CSI-RS, the first terminal device receives the first indication information first, and then receives the CSI-RS. The first terminal device may generate a CSI report according to the first indication information only after receiving the CSI-RS. Considering the time required for CSI report generation, that is, the calculation time of CSI. The first terminal device may also activate the third timer at the Nth symbol after the end symbol of the CSI-RS, which can be understood as activating the third timer at the Nth symbol after the CSI-RS is received, which can also be understood as The third timer is activated at the Nth symbol after the last symbol of the CSI-RS is received. For the description that the first terminal device activates the third timer at the Nth symbol after the end symbol of the CSI-RS, you can refer to the above description that the second terminal device activates the first timing at the Nth symbol after the end symbol of the first indication information The description of the device will not be repeated here.

Wherein, in another implementation manner, the activation time of the third timer may be determined according to the upper limit of the CSI reporting delay and the calculation time of the CSI. For example, the activation time of the third timer may be less than or equal to the difference between the upper limit of the CSI reporting delay and the calculation time of the CSI. For the description of the activation time of the third timer, reference may be made to the description of the activation time of the first timer under another implementation manner below in step 703, and details are not repeated here. It can be understood that the above example of determining the activation time of the third timer according to the upper limit of the CSI reporting delay and the calculation time of the CSI is only an exemplary illustration, and does not constitute a limitation.

Optionally, when the first terminal device activates the third timer at the Nth symbol after the first indication information, the end symbol of the first PSSCH or CSI-RS, or at the Lth time slot after the first symbol During the third timer, there is a period of time between when the first terminal device receives the first indication information and activates the third timer. During this period, if the first terminal device is in the active period of DRX, the first terminal device also needs to monitor the PSCCH or the SCI. Therefore, the first terminal device may not monitor the control signaling during this period to reduce the power consumption of the first terminal device, and the first terminal device The first symbol activates the fourth timer, or activates the fourth timer in the Lth time slot after the first symbol, and does not monitor the PSCCH or the SCI within the activation time of the fourth timer. The activation time of the fourth timer may be greater than or equal to the calculation time of the CSI. The time when the fourth timer expires may be the time when the third timer is activated, or may be earlier than the time when the third timer is activated. When the fourth timer times out, the fourth timer is invalid. Please refer to FIG. 11 . FIG. 11 is a schematic diagram of a third timer and a fourth timer disclosed in an embodiment of the present application. As shown in FIG. 11 , T9 is the time when the fourth timer is activated, T10 is the time when the third timer is activated and the time when the fourth timer is invalid, and T11 is the time when the third timer is invalid. The time when the fourth timer is invalid in FIG. 11 is the time when the third timer is activated.

When the CSI transmission is completed, the first terminal device determines that the third timer expires. It can be understood that when the CSI transmission is completed, regardless of whether the time interval between the current time and the time when the third timer is activated exceeds the activation time of the third timer, the third timer is invalid. Therefore, when the time interval between the time when the third timer expires and the time when the third timer is activated is smaller than the time when the third timer is activated, the first terminal device only needs to monitor that the third timer is invalid, It is not necessary to monitor until the third timer expires. Therefore, the first terminal device can end the monitoring in advance, which can reduce the monitoring time of the first terminal device, thereby reducing the power consumption of the first terminal device.

The activation time of the above-mentioned third timer may be pre-configured, may also be configured by a network device, or may be determined in other ways, which are not limited herein.

After receiving the first indication information, the first terminal device needs to generate a CSI report. When generating CSI reports, previously received or stored CSI-RSs may be used. Optionally, when receiving the CSI-RS while receiving the first indication information, the first terminal device may also generate a CSI report according to the CSI-RS received this time.

When the second terminal device receives the CSI report from the first terminal device, the second terminal device determines that the first timer expires. It can be understood that when the second terminal device receives the CSI report from the first terminal device, regardless of whether the time interval between the current time and the time at which the first timer is activated exceeds the activation time of the first timer, the first timer all fail. Therefore, when the time interval between the expiration time of the first timer and the time when the first timer is activated is smaller than the activation time of the first timer, the second terminal device only needs to monitor the expiration of the first timer. It is not necessary to monitor until the first timer expires. Therefore, the second terminal device can end the monitoring in advance, which can reduce the monitoring time of the second terminal device, thereby reducing the power consumption of the second terminal device. When the first timer expires, it is determined that the first timer is invalid, which can be understood as that when the first timer expires, the first timer is invalid regardless of whether the second terminal device receives the CSI report from the first terminal device.

Optionally, the second terminal device may send the CSI reporting delay upper limit to the first terminal device. Correspondingly, the first terminal device may receive the upper limit of the CSI reporting delay from the second terminal device. The upper limit of the CSI reporting delay may be greater than the sum of the sleep time of the first terminal device DRX and the calculation time of the CSI. The detailed description may refer to the description corresponding to FIG. 15 .

The related contents in steps 701 to 705 may refer to each other, and are not limited to corresponding steps.

Based on the above network architecture, please refer to FIG. 12 , which is a schematic flowchart of another communication method disclosed by an embodiment of the present application. As shown in FIG. 12, the communication method may include the following steps. The functions performed by the terminal device in the following steps may also be performed by a module (for example, a chip) in the terminal device.

1201. The second terminal device sends second indication information to the first terminal device.

Correspondingly, the first terminal device receives the second indication information from the second terminal device.

When the second terminal device has a service requirement, the second terminal device may send the second indication information to the first terminal device. The second indication information is used to trigger CSI reporting, and it can be understood that the second indication information has the function of triggering the first terminal device to report the CSI report to the second terminal device.

In an implementation manner, the second indication information may be carried on the fourth PSSCH, and it can be understood that the second indication information may be transmitted through the physical sideline shared channel. In one case, the second indication information may include a second-level SCI, and the second-level SCI may include a CSI request field, where the CSI request field is used to trigger CSI reporting. The value of the CSI request field may be 1 or 0, which is not limited here. In another case, the fourth PSSCH may include a second-level SCI, the second-level SCI may include a CSI request field, and the second indication information may be a CSI request field. In yet another case, the second indication information may be an indicator in the fourth PSSCH. In yet another case, the second indication information may be a reference signal in the fourth PSSCH, and the reference signal may be various reference signals such as CSI-RS. In yet another case, the second indication information may be one bit in the fourth PSSCH. For example, when this bit is 0 or 1, it is used to trigger the reporting of CSI. It should be understood that the above limitation on the second indication information is only an exemplary description, and does not constitute a limitation on the second indication information, and the second indication information can be any form of information, fields, bits, signaling, news etc.

Optionally, when the second indication information is carried on the fourth PSSCH, the fourth PSSCH may further include CSI-RS.

In another implementation manner, the second indication information may also be carried on the PSCCH.

Optionally, when the second indication information is carried on the PSCCH, the second terminal device may also send the PSSCH carrying the CSI-RS to the first terminal device.

1202. When the first terminal device is in DRX, the first terminal device sends a third PSSCH to the second terminal device within the upper limit of the CSI reporting delay.

After the first terminal device receives the second indication information from the second terminal device, when the first terminal device is in DRX, in order to ensure the timeliness of the CSI report, the first terminal device may report to the second terminal within the upper limit of the CSI report delay. The device sends the third PSSCH. The third PSSCH may include CSI reports. After receiving the second indication information, the first terminal device may first generate a CSI report according to the second indication information, and then may send the CSI report to the second terminal device through the third PSSCH.

After receiving the second indication information from the second terminal device, the first terminal device may first determine whether there is an intersection between the upper limit of the CSI reporting delay and the activation time of the DRX. When it is determined that there is an intersection between the CSI reporting delay upper limit and the DRX activation time, the first terminal device may determine the third PSSCH within the intersection between the CSI reporting delay upper limit and the DRX activation time, that is, the third PSSCH The time domain resource belongs to the intersection between the upper limit of the CSI report delay and the activation time of DRX, and the first terminal device can send the CSI report to the second terminal device through the determined third PSSCH. When the DRX cycles of the first terminal device and the second terminal are the same, the first terminal device may send a CSI report to the second terminal device at the intersection between the CSI report delay upper limit and the activation time of DRX, because the second terminal device It is also in the active period of DRX, so the second terminal device can receive the CSI report from the first terminal device. The reliability of the transmission of the CSI report can be guaranteed, and the second terminal device can perform link adaptation, which improves the reliability of the system transmission of the second terminal device. Further, the first terminal device may determine the resources of the third PSSCH in a perceptual or partial perceptual manner within the intersection between the upper limit of the CSI reporting delay and the activation time of the DRX, that is, the time domain resources of the third PSSCH belong to the CSI reporting delay. The intersection between the time limit and the activation time of DRX, the first terminal device may send a CSI report to the second terminal device through the determined third PSSCH. When it is determined that there is no intersection between the upper limit of the CSI reporting delay and the activation time of DRX, since the first terminal device is in the time interval between the time when the CSI report is triggered and the time when the CSI report is sent, the first terminal device is always in the The dormancy period of the DRX, so that the first terminal device cannot determine the transmission resource of the third PSSCH in a perceptual or partial perceptual manner. Or the first terminal device determines the transmission resource of the third PSSCH through the historical perception result, which will lead to an increase in the probability of collision of the transmission resource and increase the interference to other terminal devices. Therefore, in order to ensure that the CSI report can be sent normally, the first terminal device may determine the resources of the third PSSCH by random selection.

When there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX, and the second ratio is greater than (or greater than or equal to) the seventh threshold, the resources of the third PSSCH may be resources determined through sensing or partial sensing. When there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX, and the second ratio is less than or equal to the seventh threshold, the resources of the third PSSCH may be resources determined by random selection. For example, when it is determined that there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX, it can continue to determine whether the second ratio is greater than (or greater than or equal to) the seventh threshold, and when it is determined that the second ratio is greater than (or greater than or equal to) the seventh threshold When equal to) the seventh threshold, the resources of the third PSSCH are resources determined through sensing or partial sensing. When it is determined that the second ratio is less than or equal to (or less than) the seventh threshold, the resources of the third PSSCH are resources determined by random selection. The second ratio is the ratio of the activation time of DRX and the overlapping time of the sensing window to the sensing window. The second ratio is the ratio of the activation time of DRX and the overlapping time of the sensing window to the sensing window. In an implementation manner, when there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX, and the second ratio is less than or equal to the seventh threshold, the resources of the third PSSCH may be determined through resource selection in mode 1 resource. That is, a terminal device within the coverage of the network can obtain resources of the third PSSCH by requesting resources from the network device.

For a detailed description, reference may be made to the related description corresponding to FIG. 23 , and details are not repeated here. The seventh threshold and the fifth threshold may be the same or different, which are not limited herein. For the related description of the seventh threshold, reference may be made to the description of the fifth threshold corresponding to FIG. 23 , and details are not repeated here.

The randomly selected resource pool and the perceived or partially perceived resource pool may be the same resource pool, or may be different resource pools. For example, the first terminal device is configured with two resource pools, and the resources in one resource pool are used by the terminal device in a perceptual or partial perceptual manner. The resources in the other resource pool are used by the terminal device through random selection. For another example, the first terminal device is configured with a resource pool, and the resource pool supports a resource selection manner of perception, partial perception or random selection. That is, any resource that is perceived, partially perceived or randomly selected can be selected from this resource pool.

It can be understood that the above description of the randomly selected resource pool and the sensed or partially sensed resource pool is exemplary and does not constitute a limitation. Please refer to FIG. 13 . FIG. 13 is a schematic diagram of an intersection between a CSI reporting delay upper limit disclosed by an embodiment of the present application and the activation time of DRX. FIG. 13 illustrates three cases where there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX. One is that the upper limit of CSI reporting delay and the activation period of the current DRX cycle and the activation period of the next DRX cycle have intersections, and the other is that the upper limit of CSI reporting delay can overlap with the activation period of the next DRX cycle, Another is that the upper limit of CSI reporting delay may overlap with the activation period of the current DRX cycle. It can be understood that FIG. 13 is only an exemplary illustration of the intersection between the upper limit of CSI reporting delay and the activation time of DRX, and does not constitute a limitation, and may also be other methods, which are not limited here.

Please refer to FIG. 14 . FIG. 14 is a schematic diagram showing that there is no intersection between a CSI reporting delay upper limit disclosed by an embodiment of the present application and the activation time of DRX. FIG. 14 illustrates four cases where there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX. It can be understood that FIG. 14 is only an exemplary illustration that there is no intersection between the upper limit of CSI reporting delay and the activation time of DRX, and does not constitute a limitation, and may also be other methods, which are not limited here.

After receiving the second indication information, the first terminal device needs to generate a CSI report. When generating the CSI report, the previously received or stored CSI-RS may be used, or other information may be used. Optionally, when the first terminal device receives the CSI-RS while receiving the second indication information, the first terminal device may also generate a CSI report according to the CSI-RS received this time.

Based on the above network architecture, please refer to FIG. 15 , which is a schematic flowchart of another communication method disclosed by an embodiment of the present application. As shown in FIG. 15 , the communication method may include the following steps. The functions performed by the terminal device in the following steps may also be performed by a module (for example, a chip) in the terminal device.

1501. The second terminal device sends a CSI report delay upper limit to the first terminal device.

Correspondingly, the first terminal device receives the CSI report delay upper limit from the second terminal device.

Please refer to FIG. 16 . FIG. 16 is a schematic diagram of an upper limit of CSI reporting delay, the sleep time of the DRX of the first terminal device, and the calculation time of CSI according to an embodiment of the present application. As shown in FIG. 16 , when the time interval between the time when the first terminal device is triggered to report CSI and the time when the first terminal device enters the sleep period is equal to the calculation time of CSI, when the first terminal device generates a CSI report, that is, the first terminal device generates a CSI report. When the terminal device prepares the CSI report, the first terminal device just enters the sleep period of DRX. If the first terminal device determines the transmission resource through perception or partial perception, the first terminal device cannot determine the transmission resource during the sleep period, so that the first terminal device cannot send a CSI report to the second terminal device during the sleep period. When the upper limit of the CSI reporting delay is smaller than the sleep time of the first terminal device DRX and the calculation time of CSI, when the upper limit of the CSI reporting delay is reached, the first terminal device is still in the sleep period, so that the first terminal device cannot respond to this trigger. Return CSI report. When the upper limit of the CSI reporting delay is equal to the sleep time of the first terminal device DRX and the calculation time of the CSI, when the upper limit of the CSI reporting delay is reached, the first terminal device is switching from the sleep period to the active period, and the first terminal device may not be able to A CSI report is sent so that the first terminal device cannot return a CSI report for this trigger. Therefore, in order to avoid the occurrence of the above problems, when the first terminal device is in DRX, the second terminal device can configure a CSI report delay upper limit for the first terminal device, and the CSI report delay upper limit can be greater than the sleep state of the first terminal device DRX The sum of the time and the computation time of the CSI.

Based on the above network architecture, please refer to FIG. 17 , which is a schematic flowchart of another communication method disclosed by an embodiment of the present application. As shown in FIG. 17 , the communication method may include the following steps. The functions performed by the terminal device in the following steps may also be performed by a module (for example, a chip) in the terminal device.

1701. The second terminal device sends the first duration to the first terminal device.

Correspondingly, the first terminal device receives the first duration from the second terminal device.

The first duration is the duration of the inactivity timer. The first duration may be greater than or equal to the upper limit of the CSI reporting delay or the calculation time of the CSI. After the terminal device receives an SL transmission, the inactive timer can make the terminal device continue to monitor within the activation time of the inactive timer.

Please refer to FIG. 18 . FIG. 18 is a schematic diagram of a CSI reporting delay upper limit and CSI calculation time disclosed in an embodiment of the present application. FIG. 18 illustrates a situation in which four types of terminal equipment are in DRX, and the terminal equipment cannot report the CSI report because the terminal equipment cannot determine the transmission resource by means of sensing or partial sensing. FIG. 18 is only an exemplary illustration, and does not constitute a limitation, and other situations may also be used, which are not limited herein. Therefore, in order to avoid the above situation, when the first terminal device is in DRX, the second terminal device can configure or reconfigure the duration of the inactive timer for the first terminal device, and the duration of the inactive timer can be greater than or equal to CSI calculation time, so as to ensure that the first terminal device can determine the transmission resource through sensing or partial sensing, or can learn more sensing results to improve the reliability of the transmission resource, so that the CSI report can be reported through the determined transmission resource. When the unit of the duration of the timer is a symbol, a time slot, etc., the duration of the inactive timer is equal to the calculation time of the CSI, which can also ensure that the first terminal device can report the CSI report.

In the prior art, the terminal equipment reports the CSI report within the upper limit of the CSI report delay. Therefore, in order to ensure that the terminal device can determine the transmission resource through perception or partial perception within the upper limit of the CSI report delay, so as to report the CSI report through the determined reliable transmission resource, when the first terminal device is in DRX, the second terminal device is in DRX. The device may configure or reconfigure the duration of the inactive timer for the first terminal device, and the duration of the inactive timer may be greater than or equal to the upper limit of the CSI reporting delay.

The second terminal device may first determine whether the overlap time between the upper limit of the CSI reporting delay and the period of activation time of the first terminal device DRX is less than the calculation time of the CSI, and when it is determined that the upper limit of the CSI reporting delay and the DRX of the first terminal device overlap When the overlapping time between the periodic activation times is less than (or less than or equal to) the calculation time of CSI, it indicates that the first terminal device may not be able to report the CSI report through the transmission resources determined in a perceptual or partial perceptual manner, or the first terminal device may only report the CSI report. Knowing a small part of the sensing results within the sensing window cannot guarantee the reliability of the transmission resources determined according to the sensing results. Therefore, the second terminal device may configure or reconfigure the duration of the inactivity timer for the first terminal device. When it is determined that the overlap time between the upper limit of the CSI reporting delay and the activation time of the DRX cycle of the first terminal device is greater than or equal to (or greater than) the calculation time of CSI, it indicates that the first terminal device can perceive or partially perceive The determined transmission resource reports the CSI report, and the second terminal device may not configure or reconfigure the duration of the inactive timer for the first terminal device, thereby reducing the transmission and processing of unnecessary information, thereby saving transmission resources and reducing terminal costs. The power consumption of the device.

In an implementation manner, there may be multiple different durations of inactive timers in the second terminal device, and when necessary, the second terminal device may select a duration that meets the requirements from the multiple durations to configure or reconfigure Configured to the first terminal device.

In an implementation manner, the second terminal device may configure or reconfigure the duration of the next inactivity timer for the first terminal device. Because the value or type of the priority of the data sent by the first terminal device may have a high similarity in a short period of time, if it is too late to adjust the duration of the inactive timer currently, you can adjust the value of the inactive timer to be started next time. duration. Wherein, the larger the value of the priority is, the higher or lower the corresponding priority level may be, which is not limited herein.

In an implementation manner, the duration of the inactive timer in the first terminal device is not configured by the second terminal device, but determined adaptively in the first terminal device. The first terminal device may be configured, preconfigured or pre-defined with multiple different durations of the inactive timer, and the first terminal device may select a duration that meets the requirements from the multiple durations for use.

Based on the above network architecture, please refer to FIG. 19 , which is a schematic flowchart of another communication method disclosed by an embodiment of the present application. As shown in FIG. 19, the communication method may include the following steps. The functions performed by the terminal device in the following steps may also be performed by a module (for example, a chip) in the terminal device.

1901. The second terminal device sends third indication information to the first terminal device.

Correspondingly, the first terminal device receives the third indication information from the second terminal device.

When the second terminal device has a service requirement, the second terminal device may send third indication information to the first terminal device. The third indication information is used to trigger the reporting of CSI, and it can be understood that the third indication information has the function of triggering the first terminal device to report the CSI report to the second terminal device.

In an implementation manner, the third indication information may be carried on the fifth PSSCH, and it can be understood that the third indication information may be transmitted through the physical sideline shared channel. In one case, the third indication information may include a second-level SCI, and the second-level SCI may include a CSI request field, where the CSI request field is used to trigger CSI reporting. The value of the CSI request field may be 1 or 0, which is not limited here. In another case, the fifth PSSCH may include a second-level SCI, the second-level SCI may include a CSI request field, and the third indication information may be a CSI request field. In yet another case, the third indication information may be an indicator in the fifth PSSCH. In yet another case, the third indication information may be a reference signal in the fifth PSSCH, and the reference signal may be various reference signals such as CSI-RS. In yet another case, the third indication information may be one bit in the fifth PSSCH. For example, when this bit is 0 or 1, it is used to trigger the reporting of CSI. It should be understood that the above limitation on the third indication information is only an exemplary description, and does not constitute a limitation on the third indication information, and the third indication information can be any form of information, fields, bits, signaling, news etc.

Optionally, when the third indication information is carried on the fifth PSSCH, the fifth PSSCH may further include CSI-RS.

In another implementation manner, the third indication information may also be carried on the PSCCH.

Optionally, when the third indication information is carried on the PSCCH, the second terminal device may also send the PSSCH carrying the CSI-RS to the first terminal device.

1902. When the overlapping length between the upper limit of the CSI report delay and the activation time of the DRX of the first terminal device is greater than or equal to the first time, the first terminal device sends a CSI report to the second terminal device.

After the first terminal device receives the third indication information from the second terminal device, it may first determine whether the overlap length between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is greater than or equal to (or greater than) the first terminal device. time. When it is judged that the overlap length between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is greater than or equal to (or greater than) the first time, it indicates that the first terminal device can determine the transmission by means of perception or partial perception. The resource reports the CSI report, the first terminal device may determine the transmission resource by means of perception or partial perception, and send the CSI report to the second terminal device by using the determined transmission resource.

When it is judged that the overlap length between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than (or less than or equal to) the first time, it indicates that the first terminal device cannot transmit the transmission determined by sensing or partial sensing. The resource reports the CSI report, and the first terminal device may not report the CSI report. The first terminal device may also switch the period of the DRX, so that the overlapping length between the activation time of the DRX of the first terminal device after switching and the upper limit of the CSI report delay is greater than or equal to (or greater than) the first time, and then the first terminal device The transmission resource may be determined in a perceptual or partially perceptual manner, and the CSI report may be sent to the second terminal device through the determined transmission resource.

The first time may be the calculation time of the CSI, or may be the first threshold, or may be the first ratio of the upper limit of the CSI reporting delay. The first threshold and the first ratio may be pre-configured, may be configured by the second terminal device, may be configured by a network device, may also be configured by PC5RRC, or may be configured by other methods, here Unlimited.

Optionally, the second terminal device may send the third indication information and the value of the priority of the third indication information to the first terminal device. Correspondingly, the first terminal device may receive the third indication information and the value of the priority of the third indication information from the second terminal device. When it is determined that the overlap length between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the first time, the first terminal device may first determine whether the value of the priority of the third indication information is less than (or less than or equal to) the second threshold. When it is judged that the value of the priority of the third indication information is less than (or less than or equal to) the second threshold, it indicates that the service is an important service, the normal transmission of the service can be guaranteed, and the cycle of the first terminal device DRX can be switched. When it is determined that the value of the priority of the third indication information is greater than or equal to (or greater than) the second threshold, it indicates that the service is not important, and the cycle of the DRX of the first terminal device may not be switched. Wherein, the smaller the value of the above-mentioned priority is, the higher the level of the corresponding priority is.

The above method can also be applied to the case where the smaller the value of the priority is, the lower the level of the priority is. Correspondingly, the first terminal device may first determine whether the value of the priority of the third indication information is greater than (or greater than or equal to) the second threshold. When it is determined that the priority value of the third indication information is greater than (or greater than or equal to) the second threshold, it indicates that the service is an important service, normal transmission of the service can be guaranteed, and the cycle of the first terminal device DRX can be switched. When it is determined that the value of the priority of the third indication information is less than or equal to (or less than) the second threshold, it indicates that the service is not important, and the cycle of the first terminal device DRX may not be switched. Wherein, the second threshold may be configured by the network device, or may be configured in other manners, such as pre-configuration, default configuration, etc., or may be predefined. In one case, when the second threshold is not configured, the first terminal device may not switch the period of the DRX of the first terminal device by default.

After receiving the third indication information, the first terminal device needs to generate a CSI report. When generating the CSI report, the previously received or stored CSI-RS may be used, or other information may be used. Optionally, when the CSI-RS is received while receiving the third indication information, the first terminal device may also use the CSI-RS received this time to generate a CSI report.

Based on the above network architecture, please refer to FIG. 20 , which is a schematic flowchart of another communication method disclosed by an embodiment of the present application. As shown in FIG. 20, the communication method may include the following steps. The functions performed by the terminal device in the following steps may also be performed by a module (for example, a chip) in the terminal device.

2001. The second terminal device sends fourth indication information to the first terminal device.

Correspondingly, the first terminal device receives the fourth indication information from the second terminal device.

In the case that the second terminal device has a service requirement, the second terminal device may send fourth indication information to the first terminal device. The fourth indication information is used to trigger CSI reporting, and it can be understood that the fourth indication information has the function of triggering the first terminal device to report the CSI report to the second terminal device.

In an implementation manner, the fourth indication information may be carried on the sixth PSSCH, and it can be understood that the fourth indication information may be transmitted through the physical sideline shared channel. In one case, the fourth indication information may include a second-level SCI, and the second-level SCI may include a CSI request field, where the CSI request field is used to trigger CSI reporting. The value of the CSI request field may be 1 or 0, which is not limited here. In another case, the sixth PSSCH may include a second-level SCI, the second-level SCI may include a CSI request field, and the fourth indication information may be a CSI request field. In yet another case, the fourth indication information may be an indicator in the sixth PSSCH. In yet another case, the fourth indication information may be a reference signal in the sixth PSSCH, and the reference signal may be various reference signals such as CSI-RS. In yet another case, the fourth indication information may be one bit in the sixth PSSCH. For example, when this bit is 0 or 1, it is used to trigger the reporting of CSI. It should be understood that the above limitation on the fourth indication information is only an exemplary description, and does not constitute a limitation on the fourth indication information. The fourth indication information can be any form of information, fields, bits, signaling, news etc.

Optionally, when the fourth indication information is carried on the sixth PSSCH, the sixth PSSCH may further include CSI-RS.

In another implementation manner, the fourth indication information may also be carried on the PSCCH.

Optionally, when the fourth indication information is carried on the PSCCH, the second terminal device may also send the PSSCH carrying the CSI-RS to the first terminal device.

2002. When the overlapping length between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the first time, the first terminal device switches the period of the DRX of the first terminal device.

After the first terminal device receives the fourth indication information from the second terminal device, it may first determine whether the overlapping length between the upper limit of the CSI report delay and the activation time of the DRX of the first terminal device is less than (or less than or equal to) the first terminal device. time. When it is judged that the overlap length between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than (or less than or equal to) the first time, it indicates that the first terminal device cannot transmit the transmission determined by sensing or partial sensing. The resource reports the CSI report, and the first terminal device can switch the period of the DRX of the first terminal device, so that the overlapping length between the activation time of the DRX of the first terminal device after switching and the upper limit of the CSI report delay is greater than or equal to (or greater than) the first a time. Afterwards, the first terminal device may determine the transmission resource by means of perception or partial perception, and send the CSI report to the second terminal device by using the determined transmission resource.

Optionally, the second terminal device may send the fourth indication information and the value of the priority of the fourth indication information to the first terminal device. Correspondingly, the first terminal device may receive the fourth indication information and the value of the priority of the fourth indication information from the second terminal device. When it is determined that the overlap length between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the first time, the first terminal device may first determine whether the value of the priority of the fourth indication information is less than or equal to (or less than) the third threshold. When it is judged that the value of the priority of the fourth indication information is less than or equal to (or less than) the third threshold, it indicates that the service is an important service. In order to ensure normal transmission of the service, the cycle of the first terminal device DRX can be switched. When it is determined that the priority value of the fourth indication information is greater than (or greater than or equal to) the third threshold, it indicates that the service is not important, and the first terminal device may not switch the cycle of the first terminal device DRX. Wherein, the smaller the value of the above-mentioned priority is, the higher the level of the corresponding priority is. Wherein, the third threshold may be configured by the network device, or configured in other ways, pre-configured, or pre-defined. When the third threshold is not configured, the first terminal device does not switch the period of the DRX of the first terminal device by default.

The above method can also be applied to the case where the smaller the value of the priority is, the lower the level of the priority is. Correspondingly, the first terminal device may first determine whether the value of the priority of the fourth indication information is greater than (or greater than or equal to) the third threshold. When it is determined that the priority value of the fourth indication information is greater than (or greater than or equal to) the third threshold, it indicates that the service is an important service, normal transmission of the service can be ensured, and the cycle of the first terminal device DRX can be switched. When it is determined that the value of the priority of the fourth indication information is less than or equal to (or less than) the third threshold, it indicates that the service is not important, and the cycle of the DRX of the first terminal device may not be switched. The third threshold may be configured by the network device, or may be configured in other ways, such as pre-configuration, default configuration, etc., or may be predefined. In one case, when the third threshold is not configured, the first terminal device may not switch the period of the DRX of the first terminal device by default.

Based on the above network architecture, please refer to FIG. 21 , which is a schematic flowchart of another communication method disclosed by an embodiment of the present application. As shown in FIG. 21, the communication method may include the following steps. The functions performed by the terminal device in the following steps may also be performed by a module (for example, a chip) in the terminal device.

2101. The second terminal device sends the first data packet and the value of the priority of the first data packet to the first terminal device.

Accordingly, the first terminal device receives the first data packet and the value of the priority of the first data packet from the second terminal device.

2102. When the value of the priority of the first data packet is smaller than the fourth threshold, the first terminal device disables DRX.

After the first terminal device receives the first data packet from the second terminal device and the value of the priority of the first data packet, it can first determine whether the value of the priority of the first data packet is less than (or less than or equal to) the fourth threshold. When it is determined that the value of the priority of the first data packet is less than (or less than or equal to) the fourth threshold, it indicates that the service corresponding to the first data packet is an important service. For normal data transmission, the first terminal device may disable DRX. When it is determined that the value of the priority of the first data packet is greater than or equal to (or greater than) the sixth threshold, it indicates that the service corresponding to the first data packet is not an important service. When the first terminal device is not in DRX, in order to reduce the first The power consumption of the terminal device, the first terminal device can enable DRX. The fourth threshold and the sixth threshold may be the same or different. When the fourth threshold is different from the sixth threshold, the value of the priority corresponding to the sixth threshold is greater than the value of the priority corresponding to the fourth threshold.

Wherein, the smaller the value of the above-mentioned priority is, the higher the level of the corresponding priority is.

For example, when the value of the priority of the data packet is greater than or equal to 1 and less than or equal to 4, it indicates that the corresponding service is important, and when the first terminal device is in DRX, the first terminal device can disable DRX. When the value of the priority of the data packet is greater than or equal to 5 and less than or equal to 8, it indicates that the corresponding service is not important, and when the first terminal device is not in DRX, the first terminal device can enable DRX.

For another example, a threshold may be configured or pre-configured for each resource pool, such as 4. When the value of the priority of the data packet is less than or equal to (or less than) 4, it indicates that the corresponding service is important. When the first terminal device is in DRX , the first terminal device can disable DRX. When the value of the priority of the data packet is greater than (or greater than or equal to) 4, it indicates that the corresponding service is not important, and when the first terminal device is not in DRX, the first terminal device may enable DRX. Wherein, when the threshold is not configured, the first terminal device may enable DRX by default.

The above examples of priorities are only exemplary descriptions, and do not limit the priorities.

The above method can also be applied to the case where the smaller the value of the priority is, the lower the level of the priority is. Correspondingly, after the first terminal device receives the first data packet from the second terminal device and the value of the priority of the first data packet, it can first determine whether the value of the priority of the first data packet is greater than (or greater than or equal to) ) fourth threshold. When it is judged that the value of the priority of the first data packet is greater than (or greater than or equal to) the fourth threshold, it indicates that the service corresponding to the first data packet is an important service. For normal data transmission, the first terminal device may disable DRX. In this way, the terminal device can avoid not receiving important data due to being in DRX dormancy. When it is judged that the value of the priority of the first data packet is less than or equal to (or less than) the sixth threshold, it indicates that the service corresponding to the first data packet is not an important service. When the first terminal device is not in DRX, in order to reduce the first The power consumption of the terminal device, the first terminal device can enable DRX. The fourth threshold and the sixth threshold may be the same or different. When the fourth threshold is different from the sixth threshold, the value of the priority corresponding to the sixth threshold is lower than the value of the priority corresponding to the fourth threshold.

The fourth threshold and/or the sixth threshold may be configured by the network device, or may be configured in other manners, such as pre-configuration, default configuration, etc., or may be predefined. In one case, when the fourth threshold and/or the sixth threshold are not configured, the first terminal device may enable DRX by default.

Based on the above network architecture, please refer to FIG. 22 , which is a schematic flowchart of another communication method disclosed by an embodiment of the present application. As shown in FIG. 22, the communication method may include the following steps. The functions performed by the terminal device in the following steps may also be performed by a module (for example, a chip) in the terminal device.

2201. The second terminal device sends the second data packet and the value of the priority of the second data packet to the first terminal device.

Accordingly, the first terminal device receives the second data packet and the value of the priority of the second data packet from the second terminal device.

2202. The first terminal device adjusts the period of the DRX of the first terminal device according to the value of the priority of the second data packet.

After receiving the first data packet and the priority value of the first data packet from the second terminal device, the first terminal device can adjust the period of the DRX of the first terminal device according to the priority value of the second data packet. For example, when the priority value of the second data packet is low, it indicates that the service corresponding to the second data packet is an important service. When the value of the priority of the packet is high, it indicates that the service corresponding to the second data packet is not an important service. In order to reduce the power consumption of the first terminal device, the period of the DRX of the first terminal device can be reduced. Here, reducing the cycle of the first terminal device DRX can be understood as reducing the cycle length of the first terminal device DRX, or reducing the proportion of the activation time in the cycle of the first terminal device DRX.

For example, a threshold can be configured or preconfigured for each resource pool. When the value of the priority of the data packet is less than or equal to (or less than) this threshold, it indicates that the service corresponding to the data packet is an important service, and the first terminal device can adjust the DRX cycle to be a long cycle; when the value of the priority of the data packet is greater than (or greater than or equal to) this threshold, it indicates that the service corresponding to the data packet is not important, and the first terminal device can adjust the DRX cycle to be a short cycle. Here, adjusting the DRX cycle may be understood as adjusting the length of the DRX cycle or adjusting the proportion occupied by the activation time in the DRX cycle. For example, adjusting the DRX cycle to a short cycle may be understood as adjusting the length of the DRX cycle to a short cycle length, or adjusting the proportion occupied by the activation time in the DRX cycle to a smaller proportion.

As another example, one table may be configured or preconfigured per resource pool. The table shows the correspondence between the value intervals of different priorities and the values of different DRX cycles. For example, the correspondence can be as shown in Table 1:

Table 1 Correspondence between the value interval of the priority and the value of the DRX cycle

优先级的值的区间range of priority values	DRX周期的值The value of the DRX cycle
1-31-3	AA
4-64-6	BB
7-87-8	CC

Among them, the length of A is greater than the length of B, and the length of B is greater than the length of C.

The first terminal device adjusts the DRX cycle of the first terminal device according to the priority value of the second data packet. It can be understood that the first terminal device adjusts the next DRX cycle according to the priority value of the second data packet. Because the DRX cycle of the first terminal device is repeated, adjusting the current DRX cycle according to the value of the received data packet and the priority of the data packet may be too flexible and lead to a tight processing time of the terminal device. Since the data scheduling in a short time is similar, the next DRX cycle can be adjusted.

The above examples of the values of the priority are only exemplary descriptions, and do not constitute a limitation on the priority.

It can be understood that the above description is for the case where the smaller the priority value is, the higher the priority level is.

It also applies to the case where the smaller the value of the priority corresponds to the lower the level of the priority. For example, when the priority value of the second data packet is high, it indicates that the service corresponding to the second data packet is an important service. In order to ensure the normal transmission of the important service, the period of the DRX of the first terminal device can be increased; When the value of the priority of the packet is low, it indicates that the service corresponding to the second data packet is not an important service. In order to reduce the power consumption of the first terminal device, the period of the DRX of the first terminal device can be reduced.

Based on the above network architecture, please refer to FIG. 23 , which is a schematic flowchart of another communication method disclosed by an embodiment of the present application. As shown in FIG. 23, the communication method may include the following steps. The functions performed by the terminal device in the following steps may also be performed by a module (for example, a chip) in the terminal device.

2301. When the first terminal device is in DRX, the first terminal device determines a resource selection mode according to a first ratio.

At present, in the SL, the terminal device generally determines the transmission resource in a perceptual manner during the resource selection process in Mode 2. After the introduction of DRX in SL, since the cycle of DRX includes an active period and a dormant period, the terminal device cannot receive information during the dormant period of DRX. Therefore, the sensing window and the active period of DRX may not intersect, or may partially intersect. There may be complete overlap. Therefore, when the sensing window and the activation period of DRX do not intersect or have a partial intersection, the terminal device cannot obtain or can only obtain partial sensing results. For example, if the sensing window and the activation period of DRX do not overlap, the terminal device is in a dormant period within the sensing window, and does not receive within the sensing window, and thus cannot obtain sensing results. Therefore, when the terminal device is in DRX, the terminal device may not necessarily be able to determine the transmission resource using the sensing method, or cannot guarantee that the transmission resource determined using the sensing method is available or trustworthy. Here, acquiring the perception result can be understood as acquiring the resource occupation information in the SCI or PSCCH after receiving the SCI or PSCCH, and comparing the RSRP measurement value and the threshold to determine whether the resource indicated in the SCI or PSCCH is available.

For example, please refer to FIG. 38. FIG. 38 is a schematic diagram of a sensing window in the dormant period of DRX according to an embodiment of the present application. As shown in FIG. 38 , when all the sensing windows are in the dormant period of DRX, since the terminal device cannot receive information during the dormant period, the terminal device cannot determine the transmission resource through the sensing method.

For another example, please refer to FIG. 39 . FIG. 39 is a schematic diagram of a sensing window disclosed in an embodiment of the present application in the activation period of DRX. As shown in FIG. 39 , when all the sensing windows are in the active period of DRX, since the terminal device can receive information during the active period, the terminal device can determine the transmission resource through the sensing method.

For another example, please refer to FIG. 40 . FIG. 40 is a schematic diagram showing that a sensing window disclosed by an embodiment of the present application overlaps with the activation period of DRX. As shown in FIG. 40 , when the first half of the sensing window is within the activation period of DRX, the terminal device can receive and obtain the sensing result. When the second half of the sensing window is in the dormant period of DRX, the terminal device cannot receive and thus cannot obtain sensing results. When the terminal device subsequently needs to determine the transmission resource according to the sensing result, the terminal device can only use the sensing result in the first half of the sensing window. Since the sensing result in the second half is missing, the probability of resource conflict is high. Terminal equipment has a high probability of causing interference. That is to say, a terminal device that performs DRX will generate more interference than a terminal device that does not perform DRX.

For another example, please refer to FIG. 41 . FIG. 41 is a schematic diagram of another sensing window disclosed in an embodiment of the present application overlapping with the activation period of DRX. As shown in Figure 41, when the first half of the sensing window is in the dormant period of DRX, the terminal device cannot receive it, and thus cannot obtain the sensing result. When the second half of the sensing window is within the activation period of DRX, the terminal device can receive it, and then obtain the sensing result. When the terminal device subsequently needs to determine the transmission resource according to the sensing result, the terminal device can only use the sensing result in the second half of the sensing window. Since the sensing result may be small, the probability of resource conflict is high. The probability of equipment interference is high.

It can be understood that the sensing window in FIGS. 38-41 may be a continuous period of fixed length. The sensing window can also be a continuous period of time determined according to parameters. For example, when resource selection is triggered at time slot n, the sensing window is

Among them, T ₀ is configured by high-level parameters,

can be determined according to Table 2.

Table 2

Depends on subcarrier spacing

where _μSL represents the subcarrier spacing,

The unit can be time slot.

It can be understood that FIGS. 38 to 41 are exemplary illustrations of the relationship between the sensing window and the activation period and sleep period of DRX, and do not constitute a limitation. The sensing window and the activation period and/or sleep period of DRX can also be overlapped in other ways. , which is not limited here.

Therefore, when the first terminal device is in DRX, the first terminal device may determine the resource selection manner according to the first ratio. The first ratio is the ratio of the activation time of DRX and the overlapping time of the sensing window to the sensing window. The resource selection method can be a perceptual method or a random selection method. The way of perception can be perception or partial perception. The perception window of perception is a continuous period of time. The sensing window for partial sensing may be a continuous period of time, or a set of discontinuous time slots.

The first terminal device may first determine or calculate the first ratio, and then may determine whether the first ratio is greater than (or greater than or equal to) the fifth threshold, and when it is determined that the first proportion is greater than (or greater than or equal to) the fifth threshold, It shows that the perception result can be obtained for a long time through the perception method, and the perception result can be trusted. Since the interference caused by the reduction of the perception result is limited, the resource selection method can be the perception method, and the transmission resources can be determined by the perception method. When it is judged that the first ratio is less than or equal to (or less than) the fifth threshold, it indicates that the time for obtaining the sensing results through the sensing method is short, and the sensing results obtained within the sensing window through the sensing method are too few to guarantee that the sensing method can be obtained through the sensing method. The reliability of the determined resources, therefore, the resource selection mode may be a random selection mode, and the transmission resources may be determined by a random selection mode subsequently. Here, the sequence of calculating the first ratio by the first end device and judging the magnitude relationship between the first ratio and the fifth threshold is not limited. For example, the first terminal device may determine or calculate the first ratio while determining whether the first ratio is greater than the fifth threshold.

In an implementation manner, the selection method at any time may use the first resource pool, the sensing method may use the second resource pool, and the first resource pool is different from the second resource pool. That is, the resource pool in the random selection mode and the resource pool in the sensing mode are different resource pools. For example, the first terminal device is configured with two resource pools, resources in one resource pool are used by the terminal device in a perceptual manner, and resources in the other resource pool are used by the terminal device in a random selection manner. It can be seen that the selection mode can have a dedicated resource pool at any time, and the resource pool is not shared with the perception mode. At this time, in the resource pool configured with the random selection method, the terminal devices all determine the resources through the random selection method, and the mutual interference levels are similar, which is more fair to the terminal equipment. At the same time, the unfair problem caused by the random selection method and the perception method being configured together in a resource pool is reduced.

In another implementation manner, the resource pool of the random selection mode and the resource pool of the perception mode are the same resource pool. For example, the first terminal device is configured with a resource pool, and the resource pool supports resource selection in a perception mode and a random selection mode. That is, any resource that is perceived, partially perceived or randomly selected can be selected from this resource pool. At this time, the problem of resource waste caused by fewer terminal devices using the random selection method in the resource pool that is only configured with random selection is avoided, and the spectrum utilization rate is improved.

Although the resource pool of the random selection method and the resource pool of the perception method can be the same resource pool or different resource pools, in order to reduce the probability or possibility of resource conflict, the random selection method and the perception method can preferably be different. resource pool.

The network device may configure a fifth threshold for the first terminal device, so that the first terminal device may determine a resource selection manner according to the fifth threshold. Therefore, when the network device is configured with the fifth threshold, it indicates that the first terminal device can use multiple resource selection methods, and the first terminal device can determine the resource selection method according to the fifth threshold. If the network device does not configure the fifth threshold In the case of , it indicates that the first terminal device can only use the sensing mode, and the first terminal device can use the sensing mode to determine the transmission resource.

It can be understood that the fifth threshold may also be configured by default, or may be configured in other manners, which are not limited herein.

It can be understood that the unit of the activation time of the timer in the above several method embodiments may be a unit such as ms, a symbol, and a time slot, or may be other units, which are not limited herein. The unit of the activation time of the timer may be a specific unit or a relatively broad unit, which is not limited.

It can be understood that the related contents in the above several method embodiments may refer to each other.

It can be understood that the above-mentioned different embodiments can be used in combination with each other.

Based on the above network architecture, please refer to FIG. 24 , which is a schematic structural diagram of a communication device disclosed in an embodiment of the present application. As shown in Figure 24, the communication device may include:

A sending unit 2401, configured to send first indication information to a first terminal device, where the first indication information is used to trigger CSI reporting;

an activation unit 2402 for activating the first timer;

The monitoring unit 2403 is configured to monitor the PSCCH or the SCI within the activation time of the first timer.

In one embodiment, listening to the PSCCH or SCI is used to receive a CSI report from the first terminal device.

In one embodiment, the first indication information is carried on the first PSSCH.

In one embodiment, the first PSSCH further includes CSI-RS.

In one embodiment, the activation unit 2402 is specifically configured to activate the first timer at the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, where M is an integer greater than or equal to 1 .

In one embodiment, the activation time of the first timer is determined according to the upper limit of the CSI reporting delay.

In one embodiment, the activation time of the first timer is less than or equal to the upper limit of the CSI reporting delay.

In one embodiment, the activation unit 2402 is specifically configured to activate the first timer at the Nth symbol after the first PSSCH, the first indication information, or the end symbol of the CSI-RS, where N is greater than the calculation time of the CSI. Integer.

In one embodiment, the activation time of the first timer is determined according to the upper limit of the CSI reporting delay and the calculation time of the CSI.

In one embodiment, the activation time of the first timer is less than or equal to the difference between the upper limit of the CSI reporting delay and the calculation time of the CSI.

In one embodiment, the activation unit 2402 is further configured to activate the second timer at the first symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, and at the activation time of the second timer It does not monitor PSCCH or SCI.

In one embodiment, the first indication information may include a second-level SCI, and the second-level SCI may include a CSI request field, where the CSI request field is used to trigger CSI reporting.

In one embodiment, the communication device may further include:

The determining unit 2404 is configured to determine that the first timer expires when the CSI report from the first terminal device is received or the first timer expires.

More detailed descriptions of the foregoing sending unit 2401, activating unit 2402, monitoring unit 2403, and determining unit 2404 can be obtained directly by referring to the relevant description of the second terminal device in the method embodiment shown in FIG. 7, and will not be repeated here.

Based on the above network architecture, please refer to FIG. 25 , which is a schematic structural diagram of another communication apparatus disclosed in an embodiment of the present application. As shown in Figure 25, the communication device may include:

a receiving unit 2501, configured to receive first indication information from a second terminal device, where the first indication information is used to trigger CSI reporting;

an activation unit 2502 for activating a third timer;

The sending unit 2503 is configured to send the CSI report to the second terminal device within the activation time of the third timer.

In one embodiment, the sending unit 2503 is specifically configured to:

During the activation time of the third timer, monitor the PSCCH or the SCI, and monitor the PSCCH or the SCI to determine the second PSSCH;

A second PSSCH is sent to the second terminal device, the second PSSCH includes a CSI report.

In one embodiment, the first PSSCH further includes CSI-RS.

In one embodiment, the activation unit 2502 is specifically configured to activate the third timer at the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, where M is an integer greater than or equal to 1 .

In one embodiment, the activation time of the third timer is determined according to the upper limit of the CSI reporting delay.

In one embodiment, the activation time of the third timer is less than or equal to the upper limit of the CSI reporting delay.

In one embodiment, the activation unit 2502 is specifically configured to activate the third timer at the Nth symbol after the first PSSCH, the first indication information, or the end symbol of the CSI-RS, where N is greater than the calculation time of the CSI Integer.

In one embodiment, the activation time of the third timer is determined according to the upper limit of the CSI reporting delay and the calculation time of the CSI.

In one embodiment, the activation time of the third timer is less than or equal to the difference between the upper limit of the CSI reporting delay and the calculation time of the CSI.

In one embodiment, the activation unit 2502 is further configured to activate the fourth timer at the first symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, and at the activation time of the fourth timer Does not monitor PSCCH or SCI.

As a possible implementation manner, the first indication information includes a second-level SCI, the second-level SCI includes a CSI request field, and the CSI request field is used to trigger the reporting of CSI.

In one embodiment, the communication device may further include:

The determining unit 2504 is configured to determine that the third timer expires when the sending of the CSI report is completed.

In one embodiment, the communication device may further include:

A generating unit 2505, configured to generate a CSI report according to the CSI-RS.

More detailed descriptions of the above-mentioned receiving unit 2501, activating unit 2502, sending unit 2503, determining unit 2504 and generating unit 2505 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. Add elaboration.

Based on the above network architecture, please refer to FIG. 26 , which is a schematic structural diagram of another communication apparatus disclosed in an embodiment of the present application. As shown in Figure 26, the communication device may include:

a receiving unit 2601, configured to receive second indication information from a second terminal device, where the second indication information is used to trigger CSI reporting;

A sending unit 2602, configured to send a third PSSCH to the second terminal device within the upper limit of the CSI report delay when the first terminal device is in DRX, where the third PSSCH includes the CSI report;

When there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX, the time domain resources of the third PSSCH belong to the intersection between the upper limit of CSI reporting delay and the activation time of DRX.

In one embodiment, when there is no intersection between the upper limit of the CSI reporting delay and the activation time of the DRX, the resources of the third PSSCH are determined by random selection.

In one embodiment, when there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX, the resources of the third PSSCH are resources determined through sensing or partial sensing.

In one embodiment, when there is an intersection between the upper limit of the CSI reporting delay and the activation time of the DRX, and the second ratio is greater than the seventh threshold, the resources of the third PSSCH are resources determined through sensing or partial sensing, and the second ratio is the ratio of the activation time of DRX and the overlapping time of the sensing window to the sensing window.

In one embodiment, when there is an intersection between the upper limit of CSI reporting delay and the activation time of DRX, and the second ratio is less than or equal to the seventh threshold, the resources of the third PSSCH are determined by random selection, and the second ratio is the ratio of the activation time of DRX and the overlapping time of the sensing window to the sensing window.

In one embodiment, the second indication information is carried on the fourth PSSCH.

In one embodiment, the fourth PSSCH further includes CSI-RS.

In one embodiment, the communication device may further include:

A generating unit 2603, configured to generate a CSI report according to the CSI-RS.

In one embodiment, the second indication information includes a second-level SCI, the second-level SCI includes a CSI request field, and the CSI request field is used to trigger the reporting of CSI.

More detailed descriptions of the above receiving unit 2601 , sending unit 2602 and generating unit 2603 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 12 , which will not be repeated here.

Based on the above network architecture, please refer to FIG. 27 , which is a schematic structural diagram of another communication apparatus disclosed in an embodiment of the present application. As shown in Figure 27, the communication device may include:

The sending unit 2701 is configured to send a CSI report delay upper limit to the first terminal device, where the CSI report delay upper limit is greater than the sum of the sleep time of the first terminal device DRX and the CSI calculation time.

A more detailed description of the above-mentioned sending unit 2701 can be obtained directly by referring to the relevant description of the second terminal device in the method embodiment shown in FIG. 15 , and details are not repeated here.

Based on the above network architecture, please refer to FIG. 28 , which is a schematic structural diagram of another communication device disclosed in an embodiment of the present application. As shown in Figure 28, the communication device may include:

The receiving unit 2801 is configured to receive a CSI report delay upper limit from the second terminal device, where the CSI report delay upper limit is greater than the sum of the sleep time of the first terminal device DRX and the CSI calculation time.

A more detailed description of the above receiving unit 2801 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 15 , and details are not repeated here.

Based on the above network architecture, please refer to FIG. 29 . FIG. 29 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application. As shown in Figure 29, the communication device may include:

The sending unit 2901 is configured to send a first duration to the first terminal device, where the first duration is greater than or equal to the upper limit of the CSI reporting delay or the calculation time of the CSI, and the first duration is the duration of the inactive timer.

In one embodiment, the sending unit 2901 is specifically configured to send the first duration to the first terminal device when the overlapping time between the upper limit of the CSI reporting delay and the activation time of the DRX of the first terminal device is less than the calculation time of the CSI.

A more detailed description of the foregoing sending unit 2901 can be obtained directly by referring to the relevant description of the second terminal device in the method embodiment shown in FIG. 17 , and details are not repeated here.

Based on the above network architecture, please refer to FIG. 30 . FIG. 30 is a schematic structural diagram of another communication apparatus disclosed in an embodiment of the present application. As shown in Figure 30, the communication device may include:

The receiving unit 3001 is configured to receive a first duration from the second terminal device, where the first duration is greater than or equal to the upper limit of the CSI reporting delay or the calculation time of the CSI, and the first duration is the duration of the inactive timer.

In one embodiment, the receiving unit 3001 is specifically configured to, when the overlapping time between the upper limit of the CSI reporting delay and the activation time of the period of the DRX of the first terminal equipment is less than the calculation time of the CSI, receive the first information from the second terminal equipment. a long time.

A more detailed description of the above receiving unit 3001 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 17 , and details are not repeated here.

Based on the above network architecture, please refer to FIG. 31 , which is a schematic structural diagram of another communication device disclosed in an embodiment of the present application. As shown in Figure 31, the communication device may include:

A receiving unit 3101, configured to receive third indication information from the second terminal device, where the third indication information is used to trigger CSI reporting;

The sending unit 3102 is configured to send the CSI report to the second terminal device when the overlap length between the upper limit of the CSI report delay and the activation time of the DRX of the first terminal device is greater than or equal to the first time.

In one embodiment, the first time is the calculation time of the CSI, the first threshold or the first proportion of the upper limit of the CSI reporting delay.

In one embodiment, the communication device may further include:

The processing unit 3103 is used to determine not to report the CSI report when the overlap length between the upper limit of the CSI report delay and the activation time of the DRX is less than the first time, or to switch the period of the DRX, the activation time of the DRX after the switch and the CSI report The overlapping length between the delay upper limits is greater than or equal to the first time.

In one embodiment, the receiving unit 3101 is specifically configured to receive the third indication information and the priority value of the third indication information from the second terminal device;

The period in which the processing unit 3103 switches the DRX includes:

When the value of the priority is smaller than the second threshold, the cycle of the DRX is switched.

In one embodiment, the third indication information is carried on the fifth PSSCH.

In one embodiment, the fifth PSSCH further includes CSI-RS.

In one embodiment, the communication device may further include:

A generating unit 3104, configured to generate the CSI report according to the CSI-RS.

In one embodiment, the third indication information includes a second-level SCI, the second-level SCI includes a CSI request field, and the CSI request field is used to trigger the reporting of CSI.

More detailed descriptions of the above receiving unit 3101, sending unit 3102, processing unit 3103 and generating unit 3104 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 19, and will not be repeated here.

Based on the above network architecture, please refer to FIG. 32 , which is a schematic structural diagram of another communication device disclosed in an embodiment of the present application. As shown in Figure 32, the communication device may include:

a receiving unit 3201, configured to receive fourth indication information from the second terminal device, where the fourth indication information is used to trigger CSI reporting;

The switching unit 3202 is configured to switch the period of the DRX when the overlapping length of the upper limit of the CSI report delay and the activation time of the first terminal equipment DRX is less than the first time, between the activation time of the switched DRX and the upper limit of the CSI report delay The overlap length is greater than or equal to the first time.

In one embodiment, the receiving unit 3201 is specifically configured to receive the fourth indication information and the priority value of the fourth indication information from the second terminal device;

The switching unit 3202 is specifically configured to switch the period of the DRX when the value of the priority is less than the third threshold.

More detailed descriptions of the above receiving unit 3201 and the switching unit 3202 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 20 , and details are not repeated here.

Based on the above network architecture, please refer to FIG. 33 , which is a schematic structural diagram of another communication device disclosed in an embodiment of the present application. As shown in Figure 33, the communication device may include:

a receiving unit 3301, configured to receive the first data packet from the second terminal device and the value of the priority of the first data packet;

The disabling unit 3302 is configured to disable the DRX when the value of the priority is less than the fourth threshold.

More detailed descriptions of the foregoing receiving unit 3301 and disabling unit 3302 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 21 , which will not be repeated here.

Based on the above network architecture, please refer to FIG. 34 . FIG. 34 is a schematic structural diagram of another communication apparatus disclosed in an embodiment of the present application. As shown in Figure 34, the communication device may include:

a receiving unit 3401, configured to receive the second data packet from the second terminal device and the value of the priority of the second data packet;

The adjustment unit 3402 is configured to adjust the period of the DRX according to the value of the priority.

More detailed descriptions of the above receiving unit 3401 and the switching unit adjusting unit 3402 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 22 , and details are not repeated here.

Based on the above network architecture, please refer to FIG. 35 , which is a schematic structural diagram of another communication apparatus disclosed in an embodiment of the present application. As shown in Figure 35, the communication device may include:

A determination unit 3501, configured to determine a resource selection mode according to a first ratio when the first terminal device is in DRX, where the first ratio is the ratio of the activation time of the DRX and the overlapping time of the sensing window to the sensing window;

When the first ratio is greater than the fifth threshold, the resource selection mode is a perceptual mode, and when the first ratio is less than or equal to the fifth threshold, the resource selection mode is a random selection mode.

In one embodiment, the sensing mode is sensing or partial sensing.

In one embodiment, the selection mode uses the first resource pool at any time, and the sensing mode uses the second resource pool, and the first resource pool is different from the second resource pool.

In one embodiment, the fifth threshold is configured by the network device.

A more detailed description of the foregoing determining unit 3501 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 23 , which will not be repeated here.

Based on the above network architecture, please refer to FIG. 36 . FIG. 36 is a schematic structural diagram of another communication device disclosed in an embodiment of the present application. As shown in FIG. 36 , the communication device may include a processor 3601 , a memory 3602 , an input interface 3603 , an output interface 3604 and a bus 3605 . The memory 3602 can exist independently, and can be connected to the processor 3601 through the bus 3605 . The memory 3602 may also be integrated with the processor 3601. Among them, the bus 3605 is used to realize the connection between these components.

In one embodiment, the communication device may be a second terminal device or a module (eg, a chip) in the second terminal device, and when the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the sending unit 2401 performs the operations performed in the above-mentioned embodiments, the processor 3601 is further configured to perform the operations performed by the activation unit 2402, the monitoring unit 2403 and the determining unit 2404 in the above-mentioned embodiments, and the input interface 3603 is used for receiving external data from the communication device. For information of other communication devices, the output interface 3604 is used to perform the operations performed by the sending unit 2401 in the above-mentioned embodiment. The foregoing second terminal device or a module in the second terminal device may also be used to execute various methods performed by the second terminal device in the foregoing method embodiment of FIG. 7 , and details are not described herein again.

In one embodiment, the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. When the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the receiving unit 2501 and the sending unit 2503 perform the operations performed in the above embodiments, the processor 3601 is further configured to perform the operations performed by the activation unit 2502, the determining unit 2504 and the generating unit 2505 in the above embodiments, and the input interface 3603 is used to perform the above embodiments The operation performed by the receiving unit 2501 in the above-mentioned embodiment, and the output interface 3604 is used to perform the operation performed by the sending unit 2503 in the above-mentioned embodiment. The foregoing first terminal device or a module in the first terminal device may also be used to execute various methods performed by the first terminal device in the foregoing method embodiment of FIG. 7 , and details are not described again.

In one embodiment, the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. When the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the receiving unit 2601 and the sending unit 2602 perform the operations performed in the above-mentioned embodiments, the processor 3601 is further configured to perform the operations performed by the generating unit 2603 in the above-mentioned embodiments, and the input interface 3603 is used to perform the operations performed by the receiving unit 2601 in the above-mentioned embodiments, The output interface 3604 is used to perform the operations performed by the sending unit 2602 in the above embodiment. The foregoing first terminal device or a module in the first terminal device may also be used to execute various methods performed by the first terminal device in the foregoing method embodiment of FIG. 12 , which will not be repeated here.

In one embodiment, the communication device may be a second terminal device or a module (eg, a chip) in the second terminal device, and when the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the sending unit 2701 performs the operations performed in the above embodiments, the input interface 3603 is used to receive information from other communication devices other than the communication device, and the output interface 3604 is used to perform the operations performed by the sending unit 2701 in the above embodiments. The foregoing second terminal device or a module in the second terminal device may also be used to execute various methods performed by the second terminal device in the foregoing method embodiment of FIG. 15 , which will not be described again.

In one embodiment, the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. When the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the receiving unit 2801 performs the operations performed in the above-mentioned embodiments, the input interface 3603 is used for performing the operations performed by the receiving unit 2801 in the above-mentioned embodiments, and the output interface 3604 is used for sending information to other communication devices other than the communication device. The foregoing first terminal device or a module in the first terminal device may also be used to execute various methods performed by the first terminal device in the foregoing method embodiment of FIG. 15 , which will not be described again.

In one embodiment, the communication device may be a second terminal device or a module (eg, a chip) in the second terminal device, and when the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the sending unit 2901 performs the operations performed in the above embodiments, the input interface 3603 is used to receive information from other communication devices other than the communication device, and the output interface 3604 is used to perform the operations performed by the sending unit 2901 in the above embodiments. The foregoing second terminal device or a module in the second terminal device may also be used to execute various methods performed by the second terminal device in the foregoing method embodiment of FIG. 17 , which will not be described again.

In one embodiment, the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. When the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the receiving unit 3001 performs the operations performed in the above-mentioned embodiments, the input interface 3603 is used for performing the operations performed by the receiving unit 3001 in the above-mentioned embodiments, and the output interface 3604 is used for sending information to other communication devices other than the communication device. The foregoing first terminal device or a module in the first terminal device may also be used to execute various methods performed by the first terminal device in the foregoing method embodiment of FIG. 17 , which will not be described again.

In one embodiment, the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. When the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the receiving unit 3101 and the sending unit 3102 perform the operations performed in the above embodiments, the processor 3601 is further configured to perform the operations performed by the processing unit 3103 and the generating unit 3104 in the above embodiments, and the input interface 3603 is used to perform the receiving unit 3101 in the above embodiments. The operation performed, the output interface 3604 is used to perform the operation performed by the sending unit 3102 in the above-mentioned embodiment. The foregoing first terminal device or a module in the first terminal device may also be used to execute various methods performed by the first terminal device in the foregoing method embodiment of FIG. 19 , which will not be described again.

In one embodiment, the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. When the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the receiving unit 3201 performs the operations performed in the above-mentioned embodiments, the processor 3601 is also used to perform the operations performed by the switching unit 3202 in the above-mentioned embodiments, the input interface 3603 is used to perform the operations performed by the receiving unit 3201 in the above-mentioned embodiments, and the output interface 3604 is used for for sending information to other communication devices other than the communication device. The above-mentioned first terminal device or a module in the first terminal device can also be used to execute various methods performed by the first terminal device in the above-mentioned method embodiment of FIG. 20 , and details are not described again.

In one embodiment, the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. When the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the receiving unit 3301 performs the operations performed in the above-mentioned embodiments, the processor 3601 is also used to perform the operations performed by the disabling unit 3302 in the above-mentioned embodiments, the input interface 3603 is used to perform the operations performed by the receiving unit 3301 in the above-mentioned embodiments, and the output interface 3604 is used to send information to other communication devices other than the communication device. The foregoing first terminal device or a module in the first terminal device may also be used to execute various methods performed by the first terminal device in the foregoing method embodiment of FIG. 21 , which will not be described again.

In one embodiment, the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device. When the computer program instructions stored in the memory 3602 are executed, the processor 3601 is used to control the receiving unit 3401 performs the operations performed in the above-mentioned embodiments, the processor 3601 is also used to perform the operations performed by the adjustment unit 3402 in the above-mentioned embodiments, the input interface 3603 is used to perform the operations performed by the receiving unit 3401 in the above-mentioned embodiments, and the output interface 3604 is used for for sending information to other communication devices other than the communication device. The foregoing first terminal device or a module in the first terminal device may also be used to execute various methods performed by the first terminal device in the foregoing method embodiment of FIG. 22 , which will not be described again.

In one embodiment, the communication apparatus may be a first terminal device or a module (eg, a chip) in the first terminal device, and when the computer program instructions stored in the memory 3602 are executed, the processor 3601 is configured to execute the determining unit 3501 For the operations performed in the above embodiment, the input interface 3603 is used to receive information from other communication devices other than the communication device, and the output interface 3604 is used to send information to other communication devices other than the communication device. The foregoing first terminal device or a module in the first terminal device may also be used to execute various methods performed by the first terminal device in the foregoing method embodiment of FIG. 23 , which will not be described again.

Based on the above network architecture, please refer to FIG. 37 , which is a schematic structural diagram of another communication device disclosed in an embodiment of the present application. As shown in FIG. 37 , the communication device may include an input interface 3701 , a logic circuit 3702 and an output interface 3703 . The input interface 3701 and the output interface 3703 are connected through the logic circuit 3702 . The input interface 3701 is used for receiving information from other communication devices, and the output interface 3703 is used for outputting, scheduling or sending information to other communication devices. The logic circuit 3702 is configured to perform operations other than the operations of the input interface 3701 and the output interface 3703, for example, to implement the functions implemented by the processor 3601 in the above-mentioned embodiment. The communication device may be a network device or a module of the network device, a first terminal device or a module of the first terminal device, or a second terminal device or a module of the second terminal device. The more detailed description about the input interface 3701 , the logic circuit 3702 and the output interface 3703 can be obtained directly by referring to the relevant description of the first terminal device or the second terminal device in the above method embodiments, which will not be repeated here.

The embodiments of the present application further disclose a computer-readable storage medium, on which instructions are stored, and when the instructions are executed, the methods in the foregoing method embodiments are executed.

The embodiment of the present application further discloses a computer program product including an instruction, when the instruction is executed, the method in the foregoing method embodiment is executed.

An embodiment of the present application further discloses a communication system, the communication system includes a first terminal device and a second terminal device. For a specific description, refer to the communication shown in FIG. 7 , FIG. 12 , FIG. 15 , FIG. 17 , and FIG. 19 to FIG. 23 method.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above descriptions are only specific embodiments of the present application, and are not intended to limit the The protection scope, any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the present application shall be included within the protection scope of the present application.

Claims

A communication method, comprising:

sending first indication information to the first terminal device, where the first indication information is used to trigger reporting of channel state information CSI;

activate the first timer;

During the activation time of the first timer, monitor the physical sidelink control channel PSCCH or the sidelink control information SCI.
The method according to claim 1, wherein the monitoring of the PSCCH or the SCI is used to receive a CSI report from the first terminal device.
The method according to claim 1 or 2, wherein the first indication information is carried on the first physical sidelink shared channel PSSCH.
The method according to claim 3, wherein the first PSSCH further comprises a CSI-reference signal RS.
The method according to claim 4, wherein the activating the first timer comprises:

At the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, the first timer is activated, where M is an integer greater than or equal to 1.
The method according to claim 4, wherein the activating the first timer comprises:

The first timer is activated in the Mth time slot after the time slot where the first PSSCH, the first indication information or the CSI-RS is located, where M is an integer greater than or equal to 1.
The method according to claim 5 or 6, wherein the activation time of the first timer is less than or equal to an upper limit of CSI reporting delay.
The method according to claim 4, wherein the activating the first timer comprises:

At the Nth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, the first timer is activated, where N is an integer greater than the calculation time of the CSI.
The method according to claim 8, wherein the activation time of the first timer is less than or equal to the difference between the upper limit of CSI reporting delay and the calculation time of the CSI.
The method according to claim 8 or 9, wherein the method further comprises:

In the first symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, a second timer is activated, and the PSCCH is not monitored during the activation time of the second timer, or SCI.
The method according to any one of claims 3-10, wherein the first indication information includes a second-level SCI, the second-level SCI includes a CSI request field, and the CSI request field is used to trigger the CSI 's report.
The method according to any one of claims 1-11, wherein the method further comprises:

When the CSI report from the first terminal device is received, or the first timer expires, it is determined that the first timer expires.
A communication method, comprising:

receiving first indication information from a second terminal device, where the first indication information is used to trigger reporting of channel state information CSI;

activate the third timer;

Send a CSI report to the second terminal device within the activation time of the third timer.
The method according to claim 13, wherein the sending a CSI report to the second terminal device within the activation time of the third timer comprises:

During the activation time of the third timer, monitoring the physical sidelink control channel PSCCH or the sidelink control information SCI, where the monitoring PSCCH or the SCI is used to determine the second physical sidelink shared channel PSSCH;

Sending the second PSSCH to the second terminal device, the second PSSCH including a CSI report.
The method according to claim 13 or 14, wherein the first indication information is carried on the first PSSCH.
The method of claim 15, wherein the first PSSCH further comprises a CSI-reference signal RS.
The method according to claim 16, wherein the activating the third timer comprises:

At the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, a third timer is activated, where M is an integer greater than or equal to 1.
The method according to claim 16, wherein the activating the third timer comprises:

In the Mth time slot after the time slot where the first PSSCH, the first indication information or the CSI-RS is located, a third timer is activated, where M is an integer greater than or equal to 1.
The method according to claim 17 or 18, wherein an activation time of the third timer is less than or equal to an upper limit of CSI reporting delay.
The method according to claim 16, wherein the activating the third timer comprises:

At the Nth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, a third timer is activated, where N is an integer greater than the calculation time of the CSI.
The method according to claim 20, wherein the activation time of the third timer is less than or equal to the difference between the upper limit of CSI reporting delay and the calculation time of the CSI.
The method according to claim 20 or 21, wherein the method further comprises:

In the first symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, a fourth timer is activated, and the PSCCH is not monitored during the activation time of the fourth timer, or SCI.
The method according to any one of claims 15-22, wherein the first indication information includes a second-level SCI, the second-level SCI includes a CSI request field, and the CSI request field is used to trigger the CSI 's report.
The method according to any one of claims 13-23, wherein the method further comprises:

When the transmission of the CSI report is completed, it is determined that the third timer expires.
A communication device, comprising:

a sending unit, configured to send first indication information to the first terminal device, where the first indication information is used to trigger reporting of channel state information CSI;

an activation unit for activating the first timer;

A monitoring unit, configured to monitor the physical sidelink control channel PSCCH or the sidelink control information SCI within the activation time of the first timer.
The apparatus according to claim 25, wherein the monitoring of the PSCCH or the SCI is used for receiving a CSI report from the first terminal device.
The apparatus according to claim 25 or 26, wherein the first indication information is carried on the first physical sidelink shared channel PSSCH.
The apparatus of claim 27, wherein the first PSSCH further comprises a CSI-reference signal RS.
The apparatus according to claim 28, wherein the activation unit is specifically used for the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, The first timer is activated, and the M is an integer greater than or equal to 1.
The apparatus according to claim 28, wherein the activating unit is specifically used for the Mth time after the first PSSCH, the first indication information or the time slot where the CSI-RS is located Slot, activate the first timer, the M is an integer greater than or equal to 1.
The apparatus according to claim 29 or 30, wherein an activation time of the first timer is less than or equal to an upper limit of CSI reporting delay.
The apparatus according to claim 28, wherein the activation unit is specifically used for the Nth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, A first timer is activated, where N is an integer greater than the calculation time of the CSI.
The apparatus according to claim 32, wherein the activation time of the first timer is less than or equal to the difference between the upper limit of CSI reporting delay and the calculation time of the CSI.
The apparatus according to claim 32 or 33, wherein the activating unit is further used for the first one after the first PSSCH, the first indication information or the end symbol of the CSI-RS symbol, activate the second timer, and do not monitor PSCCH or SCI within the activation time of the second timer.
The apparatus according to any one of claims 27-34, wherein the first indication information includes a second-level SCI, the second-level SCI includes a CSI request field, and the CSI request field is used to trigger CSI 's report.
The device according to any one of claims 25-35, wherein the device further comprises:

A determining unit, configured to determine that the first timer expires when the CSI report from the first terminal device is received or the first timer expires.
A communication device, characterized in that it includes:

a receiving unit, configured to receive first indication information from the second terminal device, where the first indication information is used to trigger reporting of the channel state information CSI;

an activation unit for activating a third timer;

A sending unit, configured to send a CSI report to the second terminal equipment within the activation time of the third timer.
The device according to claim 37, wherein the sending unit is specifically configured to:

During the activation time of the third timer, monitoring the physical sidelink control channel PSCCH or the sidelink control information SCI, where the monitoring PSCCH or the SCI is used to determine the second physical sidelink shared channel PSSCH;

Sending the second PSSCH to the second terminal device, the second PSSCH including a CSI report.
The apparatus according to claim 37 or 38, wherein the first indication information is carried on the first PSSCH.
The apparatus of claim 39, wherein the first PSSCH further comprises a CSI-reference signal RS.
The apparatus according to claim 40, wherein the activation unit is specifically used for the Mth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, A third timer is activated, where M is an integer greater than or equal to 1.
The apparatus according to claim 40, wherein the activating unit is specifically used for the Mth time after the first PSSCH, the first indication information or the time slot where the CSI-RS is located Slot, activate the third timer, the M is an integer greater than or equal to 1.
The apparatus according to claim 41 or 42, wherein an activation time of the third timer is less than or equal to an upper limit of CSI reporting delay.
The apparatus according to claim 40, wherein the activation unit is specifically used for the Nth symbol after the first PSSCH, the first indication information or the end symbol of the CSI-RS, A third timer is activated, where N is an integer greater than the calculation time of the CSI.
The apparatus according to claim 44, wherein the activation time of the third timer is less than or equal to the difference between the upper limit of CSI reporting delay and the calculation time of the CSI.
The apparatus according to claim 44 or 45, wherein the activating unit is further used for the first one after the first PSSCH, the first indication information or the end symbol of the CSI-RS symbol, activate the fourth timer, and do not monitor PSCCH or SCI within the activation time of the fourth timer.
The apparatus according to any one of claims 39-46, wherein the first indication information includes a second-level SCI, the second-level SCI includes a CSI request field, and the CSI request field is used to trigger the CSI 's report.
The device according to any one of claims 37-47, wherein the device further comprises:

A determining unit, configured to determine that the third timer expires when the CSI report is sent.
A communication device, characterized in that it comprises a processor, a memory, an input interface and an output interface, the input interface is used to receive information from other communication devices other than the communication device, and the output interface is used to send information to all communication devices. Other communication devices other than the communication device output information, and the processor invokes the computer program stored in the memory to implement the method according to any one of claims 1-12.
A communication device, characterized in that it comprises a processor, a memory, an input interface and an output interface, the input interface is used to receive information from other communication devices other than the communication device, and the output interface is used to send information to all communication devices. Other communication devices other than the communication device output information, and the processor invokes the computer program stored in the memory to implement the method according to any one of claims 13-24.
A communication system, characterized by comprising the apparatus of claim 49 and the apparatus of claim 50 .
A computer-readable storage medium, characterized in that, a computer program or computer instruction is stored in the computer-readable storage medium, and when the computer program or computer instruction is executed, any one of claims 1-24 is implemented. the method described.
A chip, characterized in that it includes a processor for executing a program stored in a memory, and when the program is executed, causes the chip to execute the method according to any one of claims 1-24.
A computer program product, characterized in that the computer program product includes computer program code, which, when executed, implements the method according to any one of claims 1-24.