WO2020221261A1

WO2020221261A1 - Communication method and apparatus

Info

Publication number: WO2020221261A1
Application number: PCT/CN2020/087588
Authority: WO
Inventors: 袁璞; 苏宏家; 王源泉; 张兴炜; 张锦芳
Original assignee: 华为技术有限公司
Priority date: 2019-04-30
Filing date: 2020-04-28
Publication date: 2020-11-05
Also published as: CN111865482A

Abstract

A communication method and apparatus. The method comprises: a first terminal device receives a sidelink channel state information reference signal from a second terminal device; the first terminal device determines channel state information according to the sidelink channel state information reference signal; the first terminal device sends the channel state information to the second terminal device, wherein the channel state information is carried on a first sidelink data channel, and the bandwidth of the first sidelink data channel is smaller than a minimum sub-channel bandwidth. Because the bandwidth of the first sidelink data channel carrying the channel state information is small, the method can effectively save system resources. Embodiments of the present application is suitable for the field of Internet of Vehicles, Intelligent connected vehicles, or automatic driving.

Description

Communication method and device

Cross references to related applications

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 201910364890.7, and the application name is "a communication method and device" on April 30, 2019, the entire content of which is incorporated into this application by reference in.

Technical field

This application relates to the field of communication technology, and in particular to a communication method and device.

Background technique

In a vehicle to everything (V2X) system, terminal devices can communicate directly through the PC5 interface, and the communication link used is called the side-link. On the side link, channel state information (chanel state information, CSI) feedback usually uses a physical side-link shared channel (physical side-link shared channel, PSSCH).

In the prior art, the minimum granularity of the frequency domain of the PSSCH channel resource is one sub-channel bandwidth, which is generally 4 RBs. The data volume of CSI information is generally small, and may only have a few or dozens of bits. Assuming that the PSSCH occupying 8 symbols is used to transmit CSI information, the PSSCH will occupy 4*12*8=384 resource elements (resource elements, RE). It can be seen that sending CSI information on the existing PSSCH will cause more waste of resources.

Summary of the invention

The embodiments of the present application provide a communication method and device to solve the problem of large waste of resources when channel state information is fed back on a side link.

In the first aspect, embodiments of the present application provide a communication method, which can be applied to a first terminal device, and the method includes: the first terminal device receives a sideline channel state information reference signal from a second terminal device, and the first terminal device The channel state information is determined according to the sideline channel state information reference signal, and the first terminal device sends the channel state information to the second terminal device. The channel state information is carried on the first sideline link data channel. The bandwidth of the data channel is smaller than the minimum subchannel bandwidth.

Using the technical solution provided by the embodiments of the present application, the first terminal device can send channel state information to the second terminal device on the first side uplink data channel whose bandwidth is less than the minimum sub-channel bandwidth. Therefore, it can occupy less Resources, to achieve the purpose of saving system resources.

In a possible design, the first terminal device may also send first control information to the second terminal device, and the first control information is carried on the first side uplink data channel corresponding to the first side uplink data channel. On the control channel, the first control information is used to indicate channel state information. In this way, the first terminal device can send the first control information on the control channel corresponding to the first side uplink data channel carrying the channel state information while sending the channel state information to the second terminal device, so that the second terminal device Receive channel state information according to the first control information.

In a possible design, the first control information includes the modulation and coding scheme MCS adopted by the channel state information. In this way, the second terminal device can correctly decode the channel state information according to the MCS indicated in the first control information.

In a possible design, the sum of the number of time-domain symbols occupied by the first side uplink data channel and the corresponding first side uplink control channel is 12, where the first side uplink data channel occupied The number of time domain symbols is greater than or equal to 3 and less than or equal to 9. In this way, when there is a first side uplink control channel corresponding to the first side uplink data channel, both the first side uplink data channel and the first side uplink control channel will occupy at least 3 times. The domain symbol can thus carry channel state information and first control information.

In a possible design, the number of time-domain symbols occupied by the first side uplink data channel is 12. In this way, in a time slot, there may be no first side uplink control channel corresponding to the first side uplink data channel, and the first terminal device can directly send channel state information to the second terminal device, and the second terminal device The device performs blind detection on the channel state information on the first side uplink data.

In a possible design, the first terminal device may also receive side-line channel state information configuration information from the second terminal device. For example, the first terminal device may receive the side-line channel state information reference signal from the second terminal device. , Receiving the side row channel state information configuration information; in this way, the first terminal device determines the channel state information according to the side row channel state information reference signal, which may include: the first terminal device configures information according to the received side row channel state information, The side-line channel state information reference signal is measured to obtain the channel state information.

In a possible design, the side-line channel state information configuration information may include: measuring the time-domain granularity and/or frequency-domain granularity of the side-line channel state information reference signal, and the parameters included in the channel state information; the channel state information may include One or more parameters in the channel quality indicator CQI, order indicator RI, precoding matrix indicator PMI, and reference signal received power RSRP. In this way, the second terminal device can specifically set the manner in which the first terminal device obtains channel state information through measurement, thereby effectively improving the applicability of the communication method.

In a possible design, the side-line channel state information configuration information may include one or more of the channel state information transmission resource, the number of transmissions, and the transmission time interval; in this way, the first terminal device sends the information to the second terminal device. Sending the channel state information may include: the first terminal device sends the channel state information to the second terminal device according to the side-line channel state information configuration information. In this way, the second terminal device can also specifically set the manner in which the first terminal device sends channel state information, thereby effectively improving the applicability of the communication method.

In the second aspect, embodiments of the present application provide another communication method, which can be applied to a second terminal device, and the method includes: the second terminal device sends a sideline channel state information reference signal to the first terminal device, and the second terminal device The device receives channel state information from the first terminal device. The channel state information is determined by the first terminal device according to the sideline channel state information reference signal. The channel state information is carried on the first sideline link data channel. The bandwidth of the uplink data channel is smaller than the minimum sub-channel bandwidth.

Using the technical solution provided by the embodiments of the present application, the second terminal device can receive the channel state information sent by the first terminal device on the first side uplink data channel whose bandwidth is less than the minimum sub-channel bandwidth, and therefore, can occupy less Resources, to achieve the purpose of saving system resources.

In a possible design, the second terminal device may receive the first control information from the first terminal device, and the first control information is carried on the first side uplink control channel corresponding to the first side uplink data channel , The first control information is used to indicate channel state information. In this way, the second terminal device can receive the channel state information sent by the first terminal device, and the first terminal device transmits the first control information on the control channel corresponding to the first side uplink data channel that carries the channel state information, and according to The first control information receives the channel state information, thereby reducing the complexity of detecting the channel state information by the second terminal device.

In a possible design, the first control information includes the modulation and coding scheme MCS adopted by the channel state information, so that the second terminal device can correctly decode the channel state information according to the MCS.

In a possible design, the number of time-domain symbols occupied by the first side uplink data channel is 12. In this way, in a time slot, there may be no first side uplink control channel corresponding to the first side uplink data channel, and the second terminal device blindly performs the blind operation on the channel state information on the first side uplink data. Detection, thereby reducing the resource overhead for sending channel state information.

In a possible design, the second terminal device may also send sideline channel state information configuration information to the first terminal device, and the sideline channel state information configuration information is used to instruct the first terminal device to refer to the sideline channel state information The signal is measured to obtain channel state information.

In a possible design, the side-line channel state information configuration information may include: measuring the time-domain granularity and/or frequency-domain granularity of the side-line channel state information reference signal and the parameters included in the channel state information; the channel state information may include One or more parameters in the channel quality indicator CQI, order indicator RI, precoding matrix indicator PMI, and reference signal received power RSRP. In this way, the second terminal device can specifically set the manner in which the first terminal device obtains channel state information through measurement, thereby effectively improving the applicability of the communication method.

In a possible design, the side-line channel state information configuration information may include one or more of the channel state information transmission resource, the number of transmissions, and the transmission time interval; in this way, the second terminal device receives the information from the first terminal device. Receiving the channel state information may include: the second terminal device receives the channel state information sent by the first terminal device according to the side-line channel state information configuration information. In this way, the second terminal device can also specifically set the manner in which the first terminal device sends channel state information, thereby effectively improving the applicability of the communication method.

In a third aspect, an embodiment of the present application provides a communication device that has the function of the first terminal device in any possible design of the first aspect or the first aspect, or has the function of the second aspect or The function of the second terminal device in any possible design of the second aspect. The communication device may be a terminal device, such as a handheld terminal device, a vehicle-mounted terminal device, etc., a device included in the terminal device, such as a chip, or a device including the terminal device. The functions of the above-mentioned terminal device may be realized by hardware, or may be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a processing module and a transceiver module, wherein the processing module is configured to support the communication device to perform the corresponding function in the first aspect or any one of the first aspects. , Or perform the corresponding function in the second aspect or any one of the second aspects mentioned above. The transceiver module is used to support communication between the communication device and other communication devices, for example, receiving a sideline channel state information reference signal from the second terminal device, or sending channel state information to the second terminal device. The communication device may also include a storage module, which is coupled with the processing module, which stores program instructions and data necessary for the communication device. As an example, the processing module may be a processor, the communication module may be a transceiver, and the storage module may be a memory. The memory may be integrated with the processor or may be provided separately from the processor, which is not limited in this application.

In another possible design, the structure of the communication device includes a processor, and may also include a memory. The processor is coupled with the memory and can be used to execute computer program instructions stored in the memory, so that the communication device executes the first aspect described above. Or any one of the possible design methods of the first aspect, or implement any one of the foregoing second aspect or the second aspect of the possible design methods. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface. When the communication device is a terminal device, the communication interface may be a transceiver or an input/output interface; when the communication device is a chip included in the terminal device, the communication interface may be an input/output interface of the chip. Optionally, the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.

In a fourth aspect, an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or an instruction, when the program or an instruction is executed by the processor , So that the chip system implements any possible design method of the foregoing first aspect, or implements any possible design method of the foregoing second aspect.

Optionally, there may be one or more processors in the chip system. The processor can be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented by software, the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.

Optionally, there may be one or more memories in the chip system. The memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application. Exemplarily, the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be set on different chips. The setting method of the processor is not specifically limited.

In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer-readable instructions. When the computer reads and executes the computer-readable instructions, the computer is caused to execute the first The method in any possible design of the aspect, or the method in any possible design of the second aspect described above.

In a sixth aspect, the embodiments of the present application provide a computer program product. When the computer reads and executes the computer program product, the computer executes any of the possible design methods in the first aspect, or executes the first Any of the two possible design methods.

Description of the drawings

FIG. 1 is a schematic diagram of a network architecture of a communication system to which an embodiment of the present application is applicable;

2 is a schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 3 is a schematic structural diagram of a compact PSSCH provided by an embodiment of the application;

4 is a schematic diagram of detecting channel state information by a second terminal device according to an embodiment of the application;

FIG. 5 is a schematic structural diagram of another compact PSSCH provided by an embodiment of the application;

FIG. 6 is a schematic diagram of sending side row channel state information configuration information provided in an embodiment of the application;

FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 8 is a schematic diagram of another structure of a communication device provided by an embodiment of this application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WIMAX) communication system, fifth generation (5G) The system or new radio (NR), or applied to future communication systems or other similar communication systems, etc.

In addition, the technical solutions provided by the embodiments of the present application can be applied to cellular links, and can also be applied to links between devices, such as device-to-device (D2D) links. D2D link or V2X link may also be called side link, auxiliary link or side link. In the embodiments of the present application, the aforementioned terms all refer to links established between devices of the same type, and have the same meaning. The so-called devices of the same type can be the link between the terminal device and the terminal device, the link between the base station and the base station, and the link between the relay node and the relay node. This application The embodiment does not limit this. For the link between the terminal device and the terminal device, there are D2D links defined by 3GPP version (Rel)-12/13, and there are also car-to-car, car-to-mobile, or car-to-any entity defined by 3GPP for the Internet of Vehicles. V2X link, including Rel-14/15. It also includes the V2X link based on the NR system of Rel-16 and subsequent versions that are currently being studied by 3GPP.

Please refer to FIG. 1, which is a schematic diagram of a network architecture of a communication system to which an embodiment of this application is applicable. The communication system includes a terminal device 110 and a terminal device 120. The terminal equipment and the terminal equipment can communicate directly through the PC5 interface, and the direct communication link between the terminal equipment and the terminal equipment is the side link. Communication based on the side link can use at least one of the following channels: a physical sidelink shared channel (PSSCH) for carrying data; a physical sidelink control channel (physical sidelink) control channel, PSCCH), used to carry sidelink control information (SCI).

Optionally, the communication system further includes a network device 130 for providing timing synchronization and resource scheduling for terminal devices. The network device can communicate with at least one terminal device (such as the terminal device 110) through the Uu interface. The communication link between the network equipment and the terminal equipment includes an uplink (UL) and a downlink (DL). The terminal device and the terminal device can also realize indirect communication through the forwarding of the network device. For example, the terminal device 110 can send data to the network device 130 through the Uu interface, and then send the data to the application server 140 through the network device 130 for processing. The application server 140 delivers the processed data to the network device 130 and sends it to the terminal device 120 through the network device 130. In the communication mode based on the Uu interface, the network device 130 that forwards the uplink data from the terminal device 110 to the application server 140 and the network device 130 that forwards the downlink data delivered by the application server 140 to the terminal device 120 may be the same network device, or It can be different network devices and can be determined by the application server.

The network device in FIG. 1 may be an access network device, such as a base station. Wherein the access network device in different systems corresponding to different devices, for example, in the fourth generation mobile communication technology (the 4 ^th generation, 4G) system, the eNB may correspond, a corresponding access network device 5G 5G in the system, For example, gNB. Although only the terminal device 110 and the terminal device 120 are shown in FIG. 1, it should be understood that the network device may provide services for multiple terminal devices, and the embodiment of the present application does not limit the number of terminal devices in the communication system. Similarly, the terminal device in FIG. 1 is described by taking a vehicle-mounted terminal device or a vehicle as an example, and it should be understood that the terminal device in the embodiment of the present application is not limited thereto. It should be understood that the embodiments of the present application are not limited to 4G or 5G systems, and are also applicable to subsequent evolved communication systems.

Hereinafter, some terms in the embodiments of the present application will be explained to facilitate the understanding of those skilled in the art.

1) Terminal equipment, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a way to provide users with voice and/or data connectivity Sexual equipment. The terminal device may communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN. For example, the terminal device can be a handheld device with a wireless connection function, a vehicle-mounted device, and so on. At present, some examples of terminal devices are: mobile phones (mobile phones), tablets, laptops, palmtop computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented Augmented reality (AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, and smart grid (smart grid) The wireless terminal in the transportation safety (transportation safety), the wireless terminal in the smart city (smart city), the wireless terminal in the smart home (smart home), etc. The terminal device in the embodiments of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit that is built into a vehicle as one or more components or units. Modules, on-board components, on-board chips or on-board units can implement the method of the present application.

2) Network equipment is the equipment used in the network to connect terminal equipment to the wireless network. The network device may be a node in a radio access network, may also be called a base station, or may also be called a radio access network (RAN) node (or device). The network device can be used to convert received air frames and Internet Protocol (IP) packets to each other, and act as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network. The network equipment can also coordinate the attribute management of the air interface. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the next generation node B (gNB) in the new radio (NR) system of the fifth generation mobile communication technology (5G), or it can also include the transmission reception point. , TRP), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), or WiFi access point (access point, AP), etc., or may also include cloud A centralized unit (CU) and a distributed unit (DU) in an access network (cloud radio access network, CloudRAN) system are not limited in this embodiment of the application. For another example, a network device in a V2X technology is a roadside unit (RSU). The RSU may be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.

3) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "Multiple" refers to two or more. In view of this, "multiple" may also be understood as "at least two" in the embodiments of the present application. "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and it does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C are included. In the same way, the understanding of "at least one" and other descriptions is similar. "And/or" describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

Unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or importance of multiple objects. And the description of "first" and "second" does not limit the objects to be different.

Please refer to FIG. 2, which is a schematic flowchart of a communication method provided by an embodiment of this application. The method includes the following steps S201 to S203:

Step S201: The first terminal device receives the side channel state information reference signal from the second terminal device.

The sideline channel state information reference signal may be a channel state information-reference signal (CSI-RS) transmitted on the sideline link.

Step S202: The first terminal device determines channel state information (channel state information, CSI) according to the side-line channel state information reference signal.

In the embodiment of the present application, the first terminal device to determine the channel state information according to the sideline channel state information reference signal may be: the first terminal device measures the sideline channel state information reference signal received in step S201 to obtain the channel state information, The channel state information includes one or more parameters, which can be configured by the second terminal device.

Step S203: The first terminal device sends channel state information to the second terminal device.

In the embodiment of the present application, the channel state information is carried on the first side uplink data channel, and the bandwidth of the first side uplink data channel is smaller than the minimum sub-channel bandwidth. Exemplarily, the first side link data channel may be the PSSCH, and the first terminal device measures the side CSI-RS sent by the second terminal device, and sends the CSI to the second terminal device on the PSSCH, specifically It may include that the first terminal device performs channel coding on each information bit included in the CSI, adds a cyclic redundancy check (CRC), then modulates, and maps the modulated symbols to the resources included in the PSSCH one by one Unit (resource element, RE).

It should be understood that, compared with the existing PSSCH for carrying data, the bandwidth of the first side link data channel in the embodiment of the present application is smaller than the minimum subchannel bandwidth. Generally speaking, the minimum subchannel bandwidth that can be used can be preset in a communication system, and the minimum subchannel bandwidth is in units of subcarriers. The minimum subchannel bandwidth can be q RBs, and q is a natural number. The network device can configure the bandwidth of the data channel or the control channel according to the minimum subchannel bandwidth, and the bandwidth of the data channel scheduled by the network device is an integer multiple of the minimum subchannel bandwidth. For example, the minimum sub-channel bandwidth of the PSSCH currently used for data scheduling is generally 4 resource blocks (resource block, RB) or more, while the bandwidth of the PSSCH used to carry CSI in the embodiment of the present application may be less than 4 RBs. For example, it can be 1 to 2 RBs. For another example, the minimum subchannel bandwidth may also be set to 2RB. In this case, the bandwidth of the PSSCH used to carry CSI in the embodiment of the present application may be less than 2RB, such as 1 RB. Therefore, the first side uplink data channel can be called a compact PSSCH (compact PSSCH). In the case of only sending CSI to the second terminal device, the first terminal device uses this compact PSSCH to carry the CSI, which can effectively save system resources.

In this embodiment of the present application, the first terminal device may also send first control information to the second terminal device, where the first control information is used to indicate channel state information. The first control information is carried on the first side uplink control channel corresponding to the first side uplink data channel. For example, the first side link data channel carrying CSI is a compact PSSCH, and the first terminal device may send the first control information to the second terminal device on the PSCCH corresponding to the compact PSSCH. In this way, the second terminal device can correctly decode the content of the PSSCH by detecting and analyzing the content of the PSCCH, thereby obtaining the CSI reported by the first terminal device.

In a possible design, the first control information may include the modulation and coding scheme (MCS) used by the channel state information sent by the first terminal device, so that the second terminal device receives the first terminal device. After the control information, the channel state information is decoded. The first control information may also include a source node ID (source node ID) and a destination node ID (destination node ID). Here, the source node identifier refers to the identifier of the first terminal device, and the destination node identifier refers to the identifier of the second terminal device, indicating that the first control information is sent by the first terminal device to the second terminal device so that the second terminal device Check the information sent to yourself. The first control information may be carried by the first terminal device in sidelink control information (SCI) and sent to the second terminal device, or may also be sent in other ways, which is not limited in this application. For example, the first terminal device may send a CSI report message to the second terminal device, and the CSI report message includes the first control information and the channel state information.

Please refer to FIG. 3, which is a schematic structural diagram of a compact PSSCH provided by an embodiment of this application. In a slot, the compact PSSCH has a PSCCH corresponding to the PSSCH and used to indicate the PSSCH. The PSCCH has the same bandwidth as the compact PSSCH and is also smaller than the minimum subchannel bandwidth. The compact PSSCH, the PSCCH corresponding to the PSSCH, automatic gain control (AGC) symbols, and reserved space (GAP) symbols together form a resource set for reporting CSI information.

As shown in FIG. 3, the compact PSSCH, the PSCCH, AGC symbols, and GAP symbols corresponding to the PSSCH include a total of 14 time domain symbols, which occupy the entire time slot. Among them, the AGC symbol is used for the receiver of the second terminal device to control the power of the received data, so as to prevent the received power from exceeding the maximum dynamic range and cause error codes, the GAP symbol is used for the transceiver conversion between frames, and the AGC symbol and the GAP symbol each occupy one time Domain symbol. The PSCCH is used to indicate the PSSCH so that the receiver can decode the PSSCH correctly. PSSCH is used to carry CSI information. For example, when the second terminal device receives CSI, as shown in Figure 4, first blindly detect the PSCCH corresponding to the PSSCH, and after detecting the PSCCH, decode the CSI information carried in the PSSCH according to the correspondence between the PSCCH and the PSSCH.

It should be understood that the number of time-domain symbols occupied by the compact PSSCH and the corresponding PSCCH shown in FIG. 3 is only an example. In practical applications, the sum of the number of time-domain symbols occupied by the compact PSSCH and PSCCH is 12. However, the number of time-domain symbols occupied by the PSSCH can be greater than or equal to 3 and less than or equal to 9, and the number of time-domain symbols occupied by the corresponding PSCCH can be determined according to the number of time-domain symbols occupied by the PSSCH.

Please refer to FIG. 5, which is a schematic structural diagram of another compact PSSCH provided by an embodiment of this application. In this compact PSSCH structure, a time slot includes compact PSSCH, AGC symbols, and GAP symbols, and is the same as the previous structure. The compact PSSCH is used to carry CSI information, and the bandwidth is less than the minimum subchannel bandwidth. For example, it can be 1 or 2 RBs, and the AGC symbol and the GAP symbol each occupy a time domain symbol, which are respectively used for automatic gain control and frame transmission and reception conversion. However, the structure shown in FIG. 5 does not include the PSCCH corresponding to the compact PSSCH, and the PSSCH occupies 12 time domain symbols in one time slot. That is to say, when this compact PSSCH structure is adopted, the first terminal device will not send the first control information to the second terminal device, which requires the second terminal device to directly perform blind detection on the PSSCH when receiving CSI information. .

In the embodiment of the present application, as shown in step S200 in FIG. 6, the first terminal device may also receive side-line channel state information configuration information, that is, side-line CSI config, from the second terminal device. The sideline channel state information configuration information is used to instruct or trigger the first terminal device to send channel state information according to the received sideline channel state information reference signal. The sidelink channel state information configuration information may be carried by the second terminal device in sidelink control information (SCI) and sent to the second terminal device, or it may be transmitted to the second terminal device through a separate side-chain radio resource control (radio resource control). Resource control (RRC) signaling or other methods are sent, and this application is not limited. Moreover, the PSCCH that carries the configuration information of the side-line channel state information may not be multiplexed with the PSSCH and sent separately.

In a possible design, the side-line channel state information configuration information may include time-domain granularity and/or frequency-domain granularity of the measurement side-line channel state information reference signal, and parameters included in the channel state information. This part of the configuration information belongs to the measurement configuration part of the side-line channel state information configuration information, where the time-domain granularity of the measurement side-line channel state information reference signal refers to how many time-domain symbols the CSI is measured based on the CSI-RS. The frequency domain granularity of the measurement side channel state information reference signal refers to whether the CSI is measured based on the RB or the sub-channel. The parameters included in the channel state information refer to the CSI parameters that need to be reported. These CSI parameters may include the channel quality indicator (channel quality indicator). , CQI), order indicator (rank indicator, RI), precoding matrix indicator (precoding matrix indicator, PMI), reference signal receiving power (reference signal receiving power, RSRP) one or more of them. In this way, after receiving the sideline channel state information configuration information, the first terminal device can measure the sideline channel state information reference signal according to the measurement configuration in the sideline channel state information configuration information to obtain channel state information.

The side-line channel state information configuration information may also include one or more of channel state information transmission resources, transmission times, and transmission time intervals. This part of configuration information belongs to the reporting configuration part of the side-line channel state information configuration information, where the channel state information transmission resource refers to the time domain resource or time-frequency resource that the first terminal device can use to send the channel state information; channel state The number of times the information is sent refers to the number of times that the first terminal device repeatedly sends the channel state information after receiving the side-line channel state information configuration information, which can also be understood as the number of channel state information transmissions; the channel state information transmission time interval refers to When the first terminal device repeatedly transmits the channel state information multiple times, the time interval between two adjacent channel state information transmissions. In this way, after receiving the sideline channel state information configuration information, the first terminal device may send the channel state information according to the reporting mode indicated in the sideline channel state information configuration information by the second terminal device.

It should be noted that the side-line channel state information configuration information may also include the source node identification and the destination node identification. Here, the source node identification refers to the identification of the second terminal device, and the destination node identification refers to the identification of the first terminal device. It indicates that the side-line channel state information configuration information is sent by the second terminal device to the first terminal device. It should be understood that the side-line channel state information configuration may also include other information, for example, the pattern of the side-line channel state information reference signal, the reporting conditions of the channel state information, etc., which are not limited in this application.

In step S203, the first terminal device may send the first control information and channel state information to the second terminal device. After the first terminal device has completed the number of transmissions and the transmission time interval indicated in the side-line channel state information configuration information, The process of reporting channel state information once ends. After that, if the first terminal device again receives the side-line channel state information configuration information sent by the second terminal device, it will trigger the next channel state information reporting process.

An embodiment of the application provides a communication device. Please refer to FIG. 7, which is a schematic structural diagram of a communication device provided by an embodiment of the application. The communication device 700 includes a transceiver module 710 and a processing module 720. The communication device can be used to implement the function related to the first terminal device in any of the foregoing method embodiments, or be used to implement the function related to the second terminal device in any of the foregoing method embodiments. For example, the communication device may be a terminal device, such as a handheld terminal device or a vehicle-mounted terminal device; the communication device may also be a chip included in the terminal device, or a device including the terminal device, such as various types of vehicles.

When the communication device is used as the first terminal device to execute the method embodiment shown in FIG. 2, the processing module 720 is configured to perform the operation of determining channel state information according to the side channel state information reference signal; the transceiver module 710 is configured to Perform operations such as receiving the sideline channel state information reference signal from the second terminal device and sending the channel state information to the second terminal device.

When the communication device is used as the second terminal device to execute the method embodiment shown in FIG. 2, the processing module 720 is configured to perform the operation of determining channel state information according to the first control information; the transceiver module 710 is configured to perform The first terminal device sends a sideline channel state information reference signal, and receives channel state information from the first terminal device.

It should be understood that the foregoing transceiver module 710 may be replaced by a sending module or a transmitter when used in the sending step, and the receiving module or a receiver may be replaced by the receiving module or a receiver when the transceiver module 710 is used in the receiving step. The processing module 720 involved in the communication device may be implemented by a processor or processor-related circuit components, and the transceiver module 710 may be implemented by a transceiver or transceiver-related circuit components. The operation and/or function of each module in the communication device is to implement the corresponding process of the method shown in FIG. 2 and FIG.

Please refer to FIG. 8, which is a schematic diagram of another structure of a communication device provided in an embodiment of this application. The communication device may specifically be a terminal device. It is easy to understand and easy to illustrate. In FIG. 8, the terminal device uses a mobile phone as an example. As shown in Figure 8, the terminal equipment includes a processor, and may also include a memory, of course, it may also include a radio frequency circuit, an antenna, and an input/output device. The processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of description, only one memory and processor are shown in FIG. 8. In actual terminal equipment products, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

In the embodiments of the present application, the antenna and radio frequency circuit with the transceiver function can be regarded as the transceiver unit of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device. As shown in FIG. 8, the terminal device includes a transceiver unit 810 and a processing unit 820. The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on. The processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on. Optionally, the device for implementing the receiving function in the transceiver unit 810 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 810 can be regarded as the sending unit, that is, the transceiver unit 810 includes a receiving unit and a sending unit. The transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit. The receiving unit may sometimes be called a receiver, receiver, or receiving circuit. The transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit. It should be understood that the transceiving unit 810 is used to perform the sending and receiving operations on the terminal device side in the foregoing method embodiments. When the transceiving unit 810 is used for the sending step, it can be replaced by a sending unit or a transmitter. When the transceiving unit 810 is used for the receiving step, it can Replaced by a receiving unit or a receiver, the processing unit 820 is configured to perform other operations on the terminal device in the foregoing method embodiment except for the transceiving operation.

An embodiment of the present application also provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or instruction, when the program or instruction is executed by the processor, the The chip system implements the method in any of the foregoing method embodiments.

Exemplarily, the chip system may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC). It can also be a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (microcontroller). The controller unit, MCU), may also be a programmable controller (programmable logic device, PLD) or other integrated chips.

It should be understood that each step in the foregoing method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

The embodiment of the present application also provides a computer-readable storage medium, which stores computer-readable instructions, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute any of the foregoing method embodiments Method in.

The embodiments of the present application also provide a computer program product. When the computer reads and executes the computer program product, the computer is caused to execute the method in any of the foregoing method embodiments.

An embodiment of the present application also provides a communication system, which includes a first terminal device and a second terminal device. Optionally, the communication system may also include network equipment.

It should be understood that the processor mentioned in the embodiments of this application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), or application specific integrated circuits ( application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated in the processor.

It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present invention. The implementation process constitutes any limitation.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A communication method, characterized in that it comprises:

The first terminal device receives the sideline channel state information reference signal from the second terminal device;

Determining, by the first terminal device, channel state information according to the sideline channel state information reference signal;

The first terminal device sends the channel state information to the second terminal device, the channel state information is carried on a first side uplink data channel, and the bandwidth of the first side uplink data channel is less than Minimum sub-channel bandwidth.
The method of claim 1, wherein the method further comprises:

The first terminal device sends first control information to the second terminal device, and the first control information is carried on the first side uplink control channel corresponding to the first side uplink data channel, so The first control information is used to indicate the channel state information.
The method according to claim 2, wherein the first control information includes a modulation and coding scheme MCS adopted by the channel state information.
The method according to any one of claims 1 to 3, wherein the method further comprises:

Receiving, by the first terminal device, side channel state information configuration information from the second terminal device;

The first terminal device determining the channel state information according to the side row channel state information reference signal includes: the first terminal device determines the side row channel state information reference signal according to the side row channel state information configuration information Perform measurement to obtain the channel state information.
The method according to any one of claims 1 to 4, wherein the side row channel state information configuration information comprises: measuring the time domain granularity and/or frequency domain granularity of the side row channel state information reference signal , And the parameters included in the channel state information;

The channel state information includes one or more parameters of channel quality indicator CQI, order indicator RI, precoding matrix indicator PMI, and reference signal received power RSRP.
The method according to any one of claims 1 to 5, wherein the side-line channel state information configuration information comprises: one of the channel state information transmission resource, the number of transmissions, and the transmission time interval, or Multiple

The sending, by the first terminal device, the channel state information to the second terminal device includes: the first terminal device sending the channel state information to the second terminal device according to the side-line channel state information configuration information information.
A communication method, characterized in that it comprises:

The second terminal device sends a sideline channel state information reference signal to the first terminal device;

The second terminal device receives channel state information from the first terminal device, the channel state information is determined by the first terminal device according to the sideline channel state information reference signal, and the channel state information is carried in On the first side uplink data channel, the bandwidth of the first side uplink data channel is smaller than the minimum subchannel bandwidth.
The method according to claim 7, wherein the method further comprises:

The second terminal device receives first control information from the first terminal device, and the first control information is carried on the first side uplink control channel corresponding to the first side uplink data channel, so The first control information is used to indicate the channel state information.
The method according to claim 8, wherein the first control information includes a modulation and coding scheme MCS adopted by the channel state information.
The method according to any one of claims 7 to 9, wherein the method further comprises:

The second terminal device sends sideline channel state information configuration information to the first terminal device, where the sideline channel state information configuration information is used to instruct the first terminal device to respond to the sideline channel state information reference signal Perform measurement to obtain the channel state information.
The method according to any one of claims 7 to 10, wherein the side row channel state information configuration information comprises: measuring the time domain granularity and/or frequency domain granularity of the side row channel state information reference signal , And the parameters included in the channel state information;

The channel state information includes one or more parameters of channel quality indicator CQI, order indicator RI, precoding matrix indicator PMI, and reference signal received power RSRP.
The method according to any one of claims 7 to 11, wherein the side-line channel state information configuration information comprises: one of the channel state information transmission resource, the number of transmissions, and the transmission time interval, or Multiple

The receiving, by the second terminal device, the channel state information from the first terminal device includes: the second terminal device receiving the channel state sent by the first terminal device according to the sideline channel state information configuration information information.
A communication device, characterized by comprising:

A transceiver module for receiving a side channel state information reference signal from a second terminal device;

A processing module, configured to determine channel state information according to the side row channel state information reference signal;

The transceiver module is further configured to send the channel state information to the second terminal device, the channel state information being carried on a first side uplink data channel, and the first side uplink data channel The bandwidth is less than the minimum sub-channel bandwidth.
The device according to claim 13, wherein the transceiver module is further configured to:

Send first control information to the second terminal device, where the first control information is carried on the first side uplink control channel corresponding to the first side uplink data channel, and the first control information is used for To indicate the channel state information.
The apparatus according to claim 14, wherein the first control information includes a modulation and coding scheme (MCS) adopted by the channel state information.
The device according to any one of claims 13 to 15, wherein the transceiver module is further configured to:

Receiving side channel state information configuration information from the second terminal device;

The processing module is specifically configured to measure the side row channel state information reference signal according to the side row channel state information configuration information to obtain the channel state information.
The apparatus according to any one of claims 13 to 16, wherein the side row channel state information configuration information comprises: measuring the time domain granularity and/or frequency domain granularity of the side row channel state information reference signal , And the parameters included in the channel state information;

The channel state information includes one or more parameters of channel quality indicator CQI, order indicator RI, precoding matrix indicator PMI, and reference signal received power RSRP.
The apparatus according to any one of claims 13 to 17, wherein the side-line channel state information configuration information comprises: one of the channel state information transmission resource, the number of transmissions, and the transmission time interval, or Multiple

The transceiver module is specifically configured to: send the channel state information to the second terminal device according to the side-line channel state information configuration information.
A communication device, characterized by comprising:

A transceiver module, configured to send a side channel state information reference signal to the first terminal device;

The transceiver module is further configured to receive channel state information from the first terminal device, where the channel state information is determined by the first terminal device according to the sideline channel state information reference signal, and the channel state information It is carried on the first side uplink data channel, and the bandwidth of the first side uplink data channel is smaller than the minimum sub-channel bandwidth.
The device according to claim 19, wherein the transceiver module is further configured to:

Receiving first control information from the first terminal device, where the first control information is carried on a first side uplink control channel corresponding to the first side uplink data channel;

The device further includes a processing module, and the processing module is further configured to determine the channel state information according to the first control information.
The apparatus according to claim 20, wherein the first control information includes a modulation and coding scheme (MCS) adopted by the channel state information.
The device according to any one of claims 19 to 21, wherein the transceiver module is further configured to:

Send sideline channel state information configuration information to the first terminal device, where the sideline channel state information configuration information is used to instruct the first terminal device to measure the sideline channel state information reference signal to obtain the Channel state information.
The apparatus according to any one of claims 19 to 22, wherein the sideline channel state information configuration information comprises: measuring the time domain granularity and/or frequency domain granularity of the sideline channel state information reference signal , And the parameters included in the channel state information;

The channel state information includes one or more parameters of channel quality indicator CQI, order indicator RI, precoding matrix indicator PMI, and reference signal received power RSRP.
The apparatus according to any one of claims 19 to 23, wherein the side-line channel state information configuration information comprises: one of the channel state information transmission resource, the number of transmissions, and the transmission time interval, or Multiple

The transceiver module is specifically configured to receive the channel state information sent by the first terminal device according to the side-line channel state information configuration information.
A communication device, characterized in that the device includes at least one processor, and the at least one processor is coupled with at least one memory:

The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the apparatus executes the method according to any one of claims 1 to 6.
A computer-readable storage medium, characterized in that a computer program or instruction is stored in the computer-readable storage medium, and when the computer reads and executes the computer program or instruction, the computer is caused to execute as claimed in claims 1 to 6 The method of any one of.
A communication device, characterized in that the device includes at least one processor, and the at least one processor is coupled with at least one memory:

The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the device executes the method according to any one of claims 7 to 12.
A computer-readable storage medium, characterized in that, a computer program or instruction is stored in the computer-readable storage medium, and when the computer reads and executes the computer program or instruction, the computer executes as claimed in claims 7 to 12 The method of any one of.