RU2773244C1 - Method for wireless communication and apparatus for unlicensed spectrum - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: technical result is achieved by using the terminal to transmit a first indicative information to the network apparatus via a first transmission packet containing CG-PUSCH within the channel occupancy time (COT) received by the terminal. The uplink control information (UCI) of the CG-PUSCH channel contains the first indicative information indicating that the terminal uses a second transmission packet within the COT jointly with the network apparatus. The second transmission packet contains the channels transmitted by the network apparatus to the first terminal. When the first indicative information constitutes 1-bit indicative information indicating whether the first terminal is sharing a resource within the COT, the channels transmitted via the second transmission packet are broadcast or transmitted in the multicast mode, and the duration of the second transmission packet is less than or equal to the second set duration. When the first indicative information is used to indicate the initial position of the second transmission packet and the length of the second transmission packet, the channels transmitted via the second transmission packet contain unicast PDSCH.

EFFECT: reduced HARQ feedback delay.

16 cl, 17 dwg, 2 tbl

Description

The field of technology to which the present invention relates

Embodiments of the present invention relate to the field of communication technologies, in particular, to a wireless communication method and apparatus for unlicensed spectrum.

Background of the Invention

Unlicensed spectrum is spectrum that can be used for communication between radio devices and is allocated by a particular country or region. This spectrum is usually considered as shared spectrum. In other words, as long as the spectrum regulatory requirements of a country or region are met, communication devices in various communication systems can use that spectrum without the need to apply to government agencies for a license for a special spectrum.

With the development of communication technologies, ever-higher demands are placed on communication flexibility.

One issue that needs to be addressed immediately is how to improve communication flexibility in one aspect of unlicensed spectrum communications.

Brief summary of the present invention

Embodiments of the present invention provide a wireless communication method and apparatus for unlicensed spectrum to increase communication flexibility in one aspect of unlicensed spectrum communication.

According to a first aspect of the present invention, a wireless communication method for unlicensed spectrum is provided. This method involves: the first terminal transmitting the first indicative information to the network device by means of the first transmission packet during the channel busy time (COT) received by the first terminal, the COT including the second transmission packet and the third transmission packet, and the first indicative information is used by the network device to determine the second transmission packet within the COT.

This solution provides that the COT time received by the first terminal may include a first transmission packet, a second transmission packet, and a third transmission packet, wherein the first terminal may transmit indicative information using the first transmission packet so that the network device can detect the second packet. transmission and share the second transmission packet. In addition, a third transmission packet is further included for flexible use of the transmission resource during the COT time to avoid wasting resources and to maximize the utilization rate of transmission resources.

According to a second aspect of the present invention, a wireless communication method for unlicensed spectrum is provided. This method includes: the first device transmitting the first indicative information to the second device via the first transmission packet during the channel busy time (COT) received by the first device, the first indicative information is used to determine at least one of the following types of information: whether the first resource device during SOT; channel access schemes of the second transmission burst during COT; end position of the first transmission packet; the start position of the second transmission packet; the length of the second transmission packet; the final position or the remaining duration of the COT; a QCL (quasi-collocation) relationship between channels or signals transmitted by the first transmission burst; QCL relationships between channels or signals to be transmitted by the second transmission packet; and an interval between the end position of the first transmission packet and the start position of the second transmission packet.

This solution provides that the first device transmits the first indicative information to the second device via the first transmission burst during the channel busy time (COT) received by the first device, and the first indicative information is used to determine at least one of the following types of information: shares whether the first device is a resource during COT; channel access schemes of the second transmission burst during COT; end position of the first transmission packet; the start position of the second transmission packet; the length of the second transmission packet; the final position or the remaining duration of the COT; QCL relationship between channels or signals transmitted by the first transmission burst; QCL relationships between channels or signals to be transmitted by the second transmission packet; and an interval between the end position of the first transmission packet and the start position of the second transmission packet. The first device can transmit through the second transmission burst through the first indication information, thereby providing flexible use of the transmission resource during the COT, which prevents wasting of resources and maximizes the utilization of transmission resources.

According to a third aspect of the present invention, a channel detection method for unlicensed spectrum is provided. This method includes: performing channel detection during a first detection duration in the unlicensed spectrum, wherein: the first detection duration is greater than 16 microseconds, but less than or equal to 25 microseconds; the first detection duration includes at least one detection slot; and this detection slot is located at the start point or the end point of the first detection duration.

This solution provides that when the first detection duration exceeds 16 microseconds, but is less than or equal to 25 microseconds, detection can be performed in at least one detection slot at the start point or end point of the first detection duration to perform detection throughout a period of time that is greater than 16 microseconds but less than or equal to 25 microseconds.

According to a fourth aspect of the present invention, a wireless communication method for unlicensed spectrum is provided. This method includes: receiving by the network device the first indicative information transmitted by the first terminal, the first indicative information being transmitted by the first transmission packet during the channel busy time (COT) received by the first terminal, the COT including the second transmission packet and the third transmission packet, and the first indicative information is used by the network device to identify the second transmission packet during the COT time.

According to a fifth aspect of the present invention, a wireless communication method for unlicensed spectrum is provided. This method includes: reception by the second device of the first indicative information transmitted by the first device, and the first indicative information is transmitted by the first device through the first transmission packet during the channel busy time (COT) received by the first device, and the first indicative information is used to determine at least , one of the following types of information: whether the first device shares a resource during COT; channel access schemes of the second transmission burst during COT; end position of the first transmission packet; the start position of the second transmission packet; the length of the second transmission packet; the final position or the remaining duration of the COT; QCL relationship between channels or signals transmitted by the first transmission burst; QCL relationships between channels or signals to be transmitted by the second transmission packet; and an interval between the end position of the first transmission packet and the start position of the second transmission packet.

According to a sixth aspect of the present invention, a communication device is provided. This communication device is configured to implement said method according to any one of the first to fifth aspects of the present invention.

In particular, the communication device includes a functional module configured to implement said method according to any one of the first to fifth aspects of the present invention.

According to a seventh aspect of the present invention, a communication device is provided. This communication device includes a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to implement the method according to any of the first to fifth aspects of the present invention.

According to the eighth aspect of the present invention, a chip is provided. This chip is configured to implement said method according to any one of the first to fifth aspects of the present invention.

In particular, the chip includes a processor capable of recalling and running a computer program so as to enable a device in which the chip is installed to implement said method according to any of the first to fifth aspects of the present invention.

According to a ninth aspect of the present invention, there is provided a computer-readable storage medium capable of storing a computer program, the computer program enabling the computer to implement said method according to any of the first to fifth aspects of the present invention.

According to a tenth aspect of the present invention, there is provided a computer program product comprising computer program instructions, the computer program instructions enabling the computer to implement said method according to any of the first to fifth aspects of the present invention.

According to an eleventh aspect of the present invention, a computer program is provided. By running this computer program on a computer, the computer is enabled to implement said method according to any of the first to fifth aspects of the present invention, or according to any embodiment of these aspects.

Brief description of the figures

In FIG. 1 is a schematic diagram illustrating the architecture of a communication system according to one embodiment of the present invention.

In FIG. 2 is a diagram illustrating a communication process during a COT time according to one embodiment of the present invention.

In FIG. 3 is a flowchart illustrating an implementation flow of a communication method for unlicensed spectrum according to one embodiment of the present invention.

In FIG. 4 is a diagram illustrating a communication process during a COT time according to one embodiment of the present invention.

In FIG. 5 is a diagram illustrating a communication process during a COT time according to one embodiment of the present invention.

In FIG. 6 is a diagram illustrating a communication process during a COT time according to one embodiment of the present invention.

In FIG. 7 is a diagram illustrating a communication process during a COT time according to one embodiment of the present invention.

In FIG. 8 is a flowchart illustrating an implementation flow of a wireless communication method for unlicensed spectrum according to one embodiment of the present invention.

In FIG. 9 shows a flowchart of a wireless communication method for unlicensed spectrum according to one embodiment of the present invention.

Fig. 10 is a diagram illustrating the duration of channel detection i according to one embodiment of the present invention.

In FIG. 11 is a block diagram of a communication device according to one embodiment of the present invention.

In FIG. 12 is a block diagram of a communication device according to one embodiment of the present invention.

In FIG. 13 is a block diagram of a communication device according to one embodiment of the present invention.

In FIG. 14 is a block diagram of a network device according to one embodiment of the present invention.

In FIG. 15 is a block diagram of a communication device according to one embodiment of the present invention.

In FIG. 16 is a block diagram of a communication device according to one embodiment of the present invention.

In FIG. 17 shows a block diagram of a chip according to one embodiment of the present invention.

Detailed disclosure of the present invention

The following describes the technical solutions implemented in the embodiments of the present invention, which are disclosed in connection with the accompanying drawings. Obviously, the described embodiments represent only some, and not all, embodiments of the claimed invention. All other embodiments that can be obtained by a person skilled in the art based on the embodiments of the present invention without applying any creative effort, should be included in the scope of legal protection of the claimed invention.

The technical solutions implemented in the embodiments of the present invention are applicable to various communication systems such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Packet General Use Radio Communications (GPRS), Long Term Evolution (LTE), LTE Frequency Division Duplex (FDD), LTE Time Division Duplex (TDD), Advanced LTE (LTE- A), New Radio (NR) system, NR advanced system, LTE Unlicensed Spectrum Access System (LTE-U), NR Unlicensed Spectrum Access System (NR-U), Universal Mobile Telecommunications System (UMTS) ), Global Interoperability Communication System for Microwave Access (WiMAX), Wireless Local Area Network (WLAN), Wi-Fi (Wireless Reliability) m), a next generation communication system, or other similar communication system.

Typically, the number of connections supported by a conventional communication system is limited, and the establishment of these connections is easy to implement. However, with the development of communication technology, the mobile communication system will support not only traditional communication, but also communication types such as device-to-device communication (D2D), machine-to-machine communication (M2M), machine type communication (MTC) and communication between mobile objects (V2V) , and embodiments of the present invention are also applicable to these communication systems.

In FIG. 1 shows one example implementation of a communication system 100 to which embodiments of the present invention are applicable. Communication system 100 may include a network device UE, which may be a device that communicates with terminal 120 (which may also be referred to as a communication terminal or end device). Network device 110 may provide radio coverage of a particular geographic area and communicate with a terminal located within the specified coverage area. Optionally, the network device 110 can be a base transceiver station (BTS) in a GSM or CDMA system, or a NodeB (NB) in a WCDMA system, or an evolved NodeB (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network. (CRAN); or the network device can be a mobile switching center, relay station, access point, vehicle-mounted device, wearable device, hub, switch, network bridge, router, network-side device in a 5G system, network device in an advanced advanced PLMN network (Public Land Mobile Network) or similar device.

The communication system 100 further includes at least one terminal 120 located within the coverage area of the network device 110. As used herein, the term “terminal” means, among other things, a device capable of receiving/transmitting communication signals over a wired a channel connection, such as via the public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, direct cable connection and/or other data connection/data network; and/or via a wireless interface such as a cellular network, a wireless local area network (WLAN), a digital television network (such as a DVB-H (European digital broadcast standard) network), a satellite network, and an AM-FM broadcast transmitter; and/or other terminal device; and/or device of the IoT system (“Internet of Things”). A terminal capable of communicating via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of a mobile terminal include, but are not limited to, a satellite or cell phone; a personal communications system (PCS) terminal configured to combine a cellular radiotelephone with data processing, faxing, and communication capabilities; a personal digital assistant (PDA) configured to combine the functions of a radiotelephone, pager, Internet/Intranet access device, web browser, address book, calendar, and/or a GPS (Global Positioning System) receiver; and a conventional laptop and/or palmtop receiver or other electronic device including a radiotelephone transceiver. A terminal may refer to an access terminal, a user equipment (UE), a subscriber station, a subscriber station, a mobile station, a mobile console, a remote station, a remote terminal, a mobile device, a user terminal, a terminal device, a wireless communication device, a user agent, or a user device. The access terminal may be a cell phone; wireless phone; SIP phone (phone using the session establishment protocol); wireless subscriber access station (WLL); pocket personal computer (PDA); handheld device with wireless functionality; a computing device or any other data processing device connected to the wireless modem; device installed on the vehicle; wearable device; a terminal in a 5G network or a terminal in an advanced advanced PLMN (Public Land Mobile Network); or other similar device.

Optionally, D2D (Device to Device) communication can be supported between terminals 120.

Optionally, a 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

In FIG. 1 shows an example with one network device and two terminals. Optionally, communication system 100 may include a plurality of network devices, and a different number of terminals may reside within the coverage area of each network device. Embodiments of the present invention are not limited to the presented solution.

Optionally, communication system 100 may further include other network entities such as a network controller and a mobility management node, but embodiments of the present invention are not limited to this solution.

It should be understood that a communication device in embodiments of the present invention may refer to a device having a communication function in a system/network. Taking the communication system 100 shown in FIG. 1, the communication device may include a network device 110, a terminal 120 having a communication function, where the network device 110 and the terminal 120 may be the specific devices described above and not repeated hereinafter. The communication devices may also include other devices within the communication system 100, such as other network entities such as a network controller and a mobility management node, and this embodiment of the present invention is not limited to this solution.

It should be understood that the terms "system" and "network" are often used interchangeably in this document. The term "and/or", as used herein, denotes only an associative relationship describing related objects, indicating that there are three possible relationship options; for example, the phrase "A and/or B" could indicate three possible situations: only A; A and B; and only B. In addition, the symbol "/" occurring in this document, in general, indicates that the related objects are in an "or" relationship.

The method according to embodiments of the present invention is applicable to communications in unlicensed spectrum as well as to other communications scenario such as a communications scenario in licensed spectrum.

Unlicensed spectrum is spectrum that can be used for communication between radio devices and is allocated by a particular country or region. This spectrum can be considered as shared spectrum. In other words, if the communication devices in the various communication systems meet the spectrum regulatory requirements of a country or region, those communication devices can use that spectrum without having to apply to government agencies for a specific spectrum license. To enable harmonious coexistence of communication systems that communicate wirelessly using the unlicensed spectrum, the communications device may follow the Listen Before Talk (LBT) principle when they perform data exchange operations in the unlicensed spectrum. In other words, before starting to transmit a signal over an unlicensed spectrum channel, the communication device must first perform channel tracking (also called channel detection). And only if the channel tracking result shows that this channel is free, the communication device can transmit the signal. If the result of channel tracking performed by a communication device in the unlicensed spectrum indicates that the channel is busy, then the communication device will not be able to transmit the signal. Optionally, the LBT bandwidth is 20 MHz, or an integer multiple of 20 MHz.

For a deeper understanding of the present application, concepts applicable to communication in the unlicensed spectrum will be described below.

Maximum Channel Busy Time (MSOT) may refer to the maximum length of time that an unlicensed spectrum channel is allowed to use for signal transmission after successful completion of the LBT, with different MSOTs for different channel access schemes. The maximum value of MSOT can be, for example, 10 ms. It should be understood that MSOT is the time occupied by signal transmission.

Channel Busy Time (COT) may refer to the length of time that a signal is transmitted using an unlicensed spectrum channel after the successful completion of LBT, and the channels occupied by signals during this duration may be inconsistent. One COT cannot exceed, for example, at most 20 ms, and the duration of the signal transmission within the COT should not exceed the MSOT.

The gNB's Link Busy Time (gNB-initiated COT) may also be referred to as the gNB-initiated COT, and refers to the single channel busy time received by the gNB after the successful completion of the LBT. In addition to being used for downlink data transmission, the gNB's channel busy time can also be used by a user equipment (UE) to perform uplink transmission, subject to a certain condition.

UE Busy Time (UE-initiated COT) may also be referred to as UE-initiated COT and denotes one channel busy time obtained by the UE after the successful completion of the LBT.

Downlink (DL) data burst (DL burst) means a multicast (i.e., including one or more downlink transmissions) performed by a gNB, where the downlink multicast is continuous transmission (ie, there are no gaps between multiple downlink transmissions); or there is an interval between multicast transmissions, but this interval is less than or equal to a specific time duration (eg, 16 μs). If the interval between two downlink multicast transmissions by the gNB exceeds a predetermined time duration (eg, 16 µs), then the two downlink transmissions may be considered to belong to two downlink transmission bursts.

An uplink (UL) data transmission burst (UL transmission burst) means a multicast (i.e., including one or more uplink transmissions) performed by a user equipment (UE), wherein the uplink multicast is is a continuous transmission (ie, there are no gaps between multiple uplink transmissions); or there is an interval between multicast transmissions, but this interval is less than or equal to a specific time duration (eg, 16 μs). If the interval between two transmissions in an uplink multicast by the UE exceeds a predetermined time duration (eg, 16 µs), then the two uplink transmissions may be considered to belong to two uplink transmission bursts.

In this embodiment of the present invention, the communication device may perform the LBT operation using an appropriate channel access scheme. For ease of understanding, several channel access schemes are presented below.

Category 1 LBT (Cat-1 LBT): Transmission occurs immediately after the end of the switching interval, i.e. there is no need to find out if the channel is free; however, the category 1 channel access scheme is applicable to transmission switching within one COT. The switching interval may not exceed a given duration, eg 16 µs.

Category 2 LBT (Cat-2 LBT): This circuit may be referred to as non-random time LBT. If the channel is free during the one-time detection, then the signal can be transmitted, and if the channel is busy, then the signal transmission cannot be performed.

Category 3 LBT (Cat-3 LBT): This is a random timed LBT based on a fixed contention window size (CWS). In this case, the communication device determines that CWS is equal to CWp, where CWp is a fixed value; based on the CWp value, the communication device generates a random number N; and the communication device performs channel detection in the unlicensed spectrum, and can perform signal transmission after successful channel detection in all N slots.

Category 4 LBT (Cat-4 LBT): This is a random time LBT based on the variable size of the CWS. In this case, the communication device determines that CWS is equal to CWp, where CWp is a variable value; based on the CWp value, the communication device generates a random number N; and the communication device performs channel detection in the unlicensed spectrum, and can perform signal transmission after successful channel detection in all N slots.

From the description provided, it can be understood that the difference between Cat-3 LBT and Cat-4 LBT is whether the CWS is a fixed value or a variable value. Relatively preferred channel access schemes may be Cat-1 LBT, Cat-2 LBT, and Cat-4 LBT.

In addition, Cat-3 LBTs and Cat-4 LBTs can further prioritize channel access schemes based on data service priorities. In other words, Cat-3 LBTs and Cat-4 LBTs may respectively have different channel access sub-schemes, and different channel access sub-schemes may correspond to different data service priorities.

The channel access schemes applicable to different transmission scenarios are different from each other, and the channel access schemes applicable to different signals or channels are also different from each other.

For example, Table 1 shows the channel access schemes for different cases when COT is initiated by a gNB.

It is optionally provided that when the service includes the transmission of a plurality of priorities with data compression, the channel access scheme or priority is determined based on the data with the lowest priority among the plurality of priorities.

Optionally, non-unicast data may mean that corresponding HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment) information, such as the PDSCH for OSI transmission, need not be transmitted back for data. Unicast data may mean that corresponding HARQ-ACK information, such as a unicast PDSCH, must be sent back for data.

In another example, Table 2 defines channel access schemes for various cases when COT is initiated by a User Equipment (UE).

Optionally, after the gNB executes the Cat-4 LBT scheme and initiates the COT, the resource within the COT can be used by the user equipment (UE) to perform an uplink transmission. For an uplink transmission burst during the gNB COT, if the interval between the start position of the uplink transmission burst and the end position of the downlink transmission burst is less than or equal to 16 µs, then the UE may immediately perform data transmission on uplink; if within the COT of the gNB, an uplink transmission burst is not followed by a downlink transmission burst, then the UE may implement a Cat-2 LBT scheme before transmission; and if the interval between any two consecutive transmissions within the COT of the gNB is less than or equal to 25 µs, then the UE may implement a Cat-2 LBT scheme, for example, as shown in FIG. 2.

In other words, the gNB can share the transmission burst within the COT with the terminal so that the transmission resource within the COT can be flexibly used to avoid wasting resources and to maximize transmission resource utilization. Embodiments of the present invention provide the solution described below. According to this solution, the terminal can share the transmission packet within the COT with the network device. Details are provided below.

In FIG. 3 is a flowchart illustrating a flow for implementing a wireless communication method 200 according to one embodiment of the present invention. Method 200 includes performing at least the steps described below.

In step 210, the first terminal transmits to the network device the first indicative information via the first transmission packet during the COT received by the first terminal. The COT time includes a second transmission packet and a third transmission packet, and the first indicative information is used by the network device to determine the second transmission packet within the COT.

At step 220, the network device receives the first indicative information.

At step 230, the network device determines the second transmission packet based on the first indicative information.

Specifically, the COT time received by the first terminal may include the first transmission burst, the second transmission burst, and the third transmission burst, and the first terminal may transmit indicative information using the first transmission burst so that the network device determines the second transmission burst and can split it. In addition, a third transmission packet is further included so that the transmission resource within the COT can be flexibly used to avoid wasting resources and to maximize the utilization rate of transmission resources.

Optionally, a transmission packet in this embodiment of the present invention may include a time-frequency resource.

The transmission resources of the first transmission packet, the second transmission packet, and the third transmission packet do not overlap. In the time domain, a second transmission burst may follow the first transmission burst, and a third transmission burst may follow the second transmission burst.

Of course, in this embodiment of the present invention, the number of transmission packets within the COT may not be limited to three, and alternatively, a different number of transmission packets may be provided.

When the COT contains three transmission packets, two transition points may be provided. The transition point in this embodiment of the present invention may refer to the interval between the start position of the downlink transmission burst and the end position of the uplink transmission burst, or the interval between the start position of the uplink transmission burst and the end position of the downlink transmission burst. link, or to the interval between the start position of the uplink transmission burst and the end position of the uplink transmission burst.

When the transition point in this embodiment of the present invention refers to the interval between the start position of the downlink transmission burst and the end position of the uplink transmission burst, or the interval between the start position of the uplink transmission burst and the end position of the downlink transmission burst communication, the length of time of this interval does not have to satisfy a specific duration requirement.

If the transition point refers to the interval between the start position of the uplink transmission burst and the end position of the uplink transmission burst, then the following is provided: if the two uplink transmission bursts are uplink transmission bursts of the same device UE, then the time slice of the interval may satisfy a specific duration requirement; or if the two uplink transmission packets are uplink transmission packets of different UEs, then the time slot of the interval does not need to meet a specific duration requirement.

Optionally, the UE-initiated COT time may include at most two transition points, i. e. include no more than three transmission packets.

For example, when the second transmission burst within the UE-initiated COT time includes a unicast PDSCH, the COT contains no more than three transmission packets.

Optionally, if the UE-initiated COT does not contain a unicast PDSCH, then the COT may include more than three transmission bursts. For example, the COT initiated by UE 1 includes four transmission bursts, where the first transmission burst is used by UE 1 to transmit the PUSCH channel, the second transmission burst is used by the gNB to transmit a high priority channel or signal, the third transmission burst is used by UE 1 to transmit the channel PUSCH, and the fourth transmission burst is used by UE 2 to transmit the PUSCH. UE 1 and UE 2 have the same QCL assumption.

Of course, in this embodiment of the present invention, the UE-initiated COT may alternatively include a transition point, i. e. The COT may not include said third transmission packet.

In one embodiment of the present invention, if the UE-initiated COT time includes a transition point, then when the interval between the end position of the first transmission burst and the start position of the second transmission burst is less than or equal to 16 μs, the communication device may perform channel detection with using the Cat-1 LBT scheme, for example, to transfer data immediately after the interval ends.

In another embodiment of the present invention, if the UE-initiated COT time includes a transition point, then when the interval between the end position of the first transmission burst and the start position of the second transmission burst is greater than 16 μs but less than or equal to 25 μs, then the communication device may perform channel detection using the Cat-2 LBT scheme and perform data transmission after successful completion of the LBT.

In yet another embodiment of the present invention, if the UE-initiated COT time includes a transition point, then when the interval between the end position of the first transmission burst and the start position of the second transmission burst exceeds 25 μs, the communication device may perform channel detection using Cat-2 LBT scheme and perform data transfer after successful completion of LBT.

Optionally, in this embodiment of the present invention, the second transmission packet may be a downlink transmission packet and the third transmission packet may be an uplink transmission packet.

For example, the second transmission packet is a transmission packet that is transmitted by the network device to the first terminal or the second terminal. The third transmission packet is a transmission packet that is transmitted by the first terminal or the second terminal to the network device.

Optionally, the first terminal and the second terminal specified in this embodiment of the present invention have the same quasi-collocation (QCL) assumption.

Optionally, the fact that the first terminal and the second terminal have the same quasi-collocation (QCL) assumption can be understood as follows: the first terminal and the second terminal have the same transmission configuration indicator (TCI) state; or the QCL spatial parameter in the first TCI state of the first terminal corresponds to the first reference signal, and the QCL spatial parameter in the second TCI state of the second terminal also corresponds to the first reference signal; or the QCL spatial parameter in the first TCI state of the first terminal corresponds to the first reference signal, the QCL spatial parameter in the second TCI state of the second terminal corresponds to the second reference signal, and the first reference signal and the second reference signal are quasi-co-located or quasi-co-located on relation to the spatial parameter Rx; or the reception beam of the first terminal and the transmission beam of the second terminal are the same; or the reception beam of the first terminal and the reception beam of the second terminal are the same.

Optionally, the QCL spatial parameter includes QCL-TypeD, namely the Rx spatial parameter.

Optionally, a beam (referred to as a receive beam) that is used to receive a signal may refer to a spatial domain receive filter used to receive the signal; and accordingly, a beam (referred to as a transmission beam) which is used for signal transmission may be understood as a spatial domain transmission filter used for signal transmission. With respect to two signals transmitted or received using the same spatial domain transmit or receive filter, the two signals can be said to be quasi-collocation (QCL) signals with respect to the spatial parameter Rx, i.e. the transmit beams or the receive beams are the same.

Optionally, in this embodiment of the present invention, in addition to carrying the first indicative information, the first transmission packet may further include uplink data, such as a Physical Uplink Shared Channel (PUSCH).

Optionally, the PUSCH transmitted by the first transmission burst may be a CG-PUSCH.

In particular, the location of the PUSCH periodic resource may be preconfigured for the terminal. If the terminal has transmitted uplink data, then there is no need to send a scheduling request, and an LBT operation (eg, Cat-4 LBT) is performed before the preconfigured PUSCH resource location. Upon successful completion of the LBT, the CG-PUSCH may be transmitted at this PUSCH resource position; if the LBT fails, the LBT operation can be performed at the next position of the PUSCH resource.

Optionally, the PUSCH transmitted by the first transmission burst may be a message 3 (Msg3) within the random access procedure.

In particular, the resource of the PUSCH carrying message 3 may be determined based on the response to the random access preamble (RAR) within the random access procedure.

Optionally, the first indicative information is carried on the PUSCH by being associated with the uplink control information.

Optionally, in this embodiment of the present invention, in addition to carrying the first indicative information, the first transmission packet may further include a preamble sequence, such as a physical random access channel (PRACH).

For example, when a terminal needs to transmit a PRACH, an LBT operation (eg, Cat-4 LBT) is performed before the location of the PRACH resource. Upon successful completion of the LBT, the PRACH may be transmitted at this PRACH resource position; if the LBT fails, the LBT operation can be performed at the next position of the PRACH resource.

The PRACH resource includes a resource used to transmit a preamble sequence, such as used to transmit the first phase of a four-phase RACH preamble. Optionally, the first indicative information is differentiated by different preamble sequences or different groups of preamble sequences.

Alternatively, the PRACH resource includes a resource used for transmitting the preamble sequence and uplink data, such as used for transmitting the first phase of the biphasic RACH preamble. Optionally, the first indicative information is differentiated by different preamble sequences or different groups of preamble sequences. Optionally, the upstream data includes first indicative information.

Optionally, in this embodiment of the present invention, determining whether the first terminal shares a transmission burst during the COT with another device depends on the resource within the COT received by the first terminal and/or the size of the resource to be used.

For example, if the uplink data to be transmitted by the first terminal during the COT is relatively small, then the burst of transmissions during the COT can be shared with another device.

Optionally, according to this embodiment of the present invention, the first transmission packet may further carry second indicative information, the second indicative information being used to request the network device to schedule uplink data for the first terminal. Therefore, the network device may schedule the first terminal in the second transmission burst, and the first terminal may transmit the PUSCH through the third transmission burst.

In this case, the first transmission packet may carry a CG-PUSCH. In this case, a portion of the terminal data to be transmitted may first be transmitted by the first transmission packet, followed by another portion being transmitted by the second transmission packet. Alternatively, the first transmission packet may not carry the CG-PUSCH, ie. do not transmit upstream data.

Optionally, the first indicative information may indicate at least one of the following types of information:

whether the COT includes a second transmission packet; a channel access scheme of the second transmission packet; the start position of the second transmission packet; the length of the second transmission packet; end position of the first transmission packet; final position of the SOT; QCL relationship between channels or signals transmitted by the first transmission burst; QCL relationship between channels or signals transmitted by the second transmission burst; an interval between the end position of the first transmission packet and the start position of the second transmission packet; whether the COT includes a third transmission packet; a channel access scheme of the third transmission packet; the start position of the third transmission packet; the length of the third transmission packet; end position of the second transmission packet; and an interval between the end position of the second transmission burst and the start position of the third transmission burst.

The channel access scheme of the second transmission burst may indicate a channel access scheme that is used by the network device to perform LBT prior to the second transmission burst. The channel access scheme can be a Cat-1 LBT or a Cat-2 LBT. Accordingly, bit 1 may be used to indicate whether the channel access scheme is a Cat-1 LBT or Cat-2 LBT scheme. Because there are two candidate schemes for providing channel access, channel access schemes may differ in the use of bit 1.

The interval between the end position of the first transmission burst and the start position of the second transmission burst may be used by the network device to determine the channel access scheme used for the LBT operation performed before the second transmission burst.

The start position of the second transmission packet indicates to the network device the position at which the second transmission packet begins. Based on the start position of the second transmission burst, the network device can determine, based on the end position of the first transmission burst and the start position of the second transmission burst, the interval between the two positions and accordingly determine the channel access scheme for the LBT operation performed before the second transmission burst.

For example, if the interval between the end position of the first transmission burst and the start position of the second transmission burst is less than or equal to 16 µs, then the gNB may, for example, transmit data immediately after the end of the interval using a Cat-1 LBT scheme.

In another example, if the interval between the end position of the first transmission burst and the start position of the second transmission burst is greater than 16 µs, then the gNB may transmit upon successful completion of the LBT using a Cat-2 LBT scheme.

When the network device determines that the start position of the second transmission packet and the symbol start position at which the network device transmits payload information via the second transmission packet do not match, the network device can perform signaling by puncturing or by increasing the length of the cyclic prefix.

The length of the second transmission packet indicates the size of the time domain resource that the network device can use to transmit data. In this case, the network device can set the number of common resources within the COT that can efficiently use the high priority channel access scheme, thereby enabling more precise scheduling of downlink data transmission.

The end position of the first transmission packet indicates to the network device the location where the first transmission packet ends. The network device can determine the start position of the second transmission packet based on the end position of the first transmission packet, as well as determine the channel access scheme based on the size of the interval between the start position of the second transmission packet and the end position of the first transmission packet or the range to which the size of this interval belongs.

The end position of the COT allows the network device to know the position where the COT ends. Therefore, the network device can determine the end position of the second transmission packet or the length of the second transmission packet such that the second transmission packet does not exceed the COT; or, between the end position of the second transmission burst and the end position of the COT, a specific resource is reserved, which is used for the third transmission packet, and the network device can set the number of common resources within the COT that can effectively use the high priority channel access scheme, thereby providing more precise scheduling of downlink data transmission.

The network device may transmit via the second transmission burst based on the QCL relationship between channels or signals transmitted via the first transmission burst. Alternatively, the second indicative information may carry the QCL relationship between channels or signals transmitted via the second transmission burst, and the network device may transmit via the second transmission burst based on the QCL relationship between channels or signals transmitted via the second transmission burst.

Optionally, the QCL relationship between channels or signals can be understood as: the assumption of QCL channels or signals; or TC1-state of channels or signals; or reference signals corresponding to the spatial parameters of the Rx channels or signals; or spatial parameters of Rx channels or signals; or beams of transmission of channels or signals; or beams receiving channels or signals.

Optionally, in an NR-U system, the channel access method or signal transmission method may be directional. Therefore, when indicating the COT-related parameter, the terminal can simultaneously indicate the QCL of the user equipment (UE), for example, the data-related SSB index or CSI-RS of the user equipment (UE). After receiving the QCL assumption indicator, the network device can use the resource during the shared COT time to transmit to the UE with the same QCL assumption. Alternatively, the user equipment (UE) may be instructed to transmit an uplink QCL assumption, which is determined, for example, via an uplink SRS resource or PMI.

Optionally, the first indicative information and/or the second indicative information in this embodiment of the present invention is transferred to the UCI or DMRS.

The DMRS signal may be used to demodulate the PUSCH. In this case, the first transmission packet may carry a PUSCH. The DMRS signal may be a PUSCH demodulation DMRS.

It should be understood that when the first indicative information and/or the second indicative information is carried by uplink control information (UCI), the PUSCH may alternatively be transmitted by the first transmission burst. In this case, the UCI may be associated PUSCH information.

With regard to said indicative information (which may include first indicative information and/or second indicative information), it can be said that from a plurality of demodulation reference signals and based on the content to be carried by the indicative information, the first device selects the demodulation reference signal used to carry indicative information. Accordingly, the network device can detect the content set from the plurality of content sets based on the demodulation reference signal.

For example, the network device may configure at least two parameter sets by higher layer signals, and each parameter set includes information such as the end position of the first transmission packet; the remaining length or end position of the UE-initiated COT time; a QCL relationship between channels or signals transmitted by the first transmission packet or the second transmission packet; whether the second transmission packet is shared with the UE by the transmission packet; and a channel access scheme corresponding to the second transmission burst. Therefore, the demodulation reference signal sequence (DMRS) to be transmitted can be determined based on the parameter set to be used, so that the network device can determine the appropriate parameter set based on the DMRS sequence.

Transferring information by a DMRS sequence may refer to transferring information by selecting a different DMRS sequence. Therefore, the DMRS sequence is generally applicable to the indication of relatively small amount of information. When more parameters from the corresponding parameter set are shared during COT, the determination can be made by combining higher layer signaling configuration and DMRS selection.

Optionally, when the terminal transmits the scheduled PUSCH (S-PUSCH) to the network device via the first transmission burst, the first indicative information may be carried in a reference signal used to demodulate the S-PUSCH. For example, the network device allocates two DMRS sequences to the UE, and the UE selects the corresponding DMRS sequence based on whether the resource can be shared during the COT.

Optionally, when the UE transmits the configured Granted Access PUSCH (CG-PUSCH) to the network device via the first transmission burst, the first indication information may be carried by uplink control information (UCI) associated with the CG-PUSCH.

For ease of understanding, the first indicative information is described below in connection with FIG. 4 and 5.

For example, as shown in FIG. 4, during the UE-initiated COT time, when the UE transmits the CG-PUSCH in time block n, the uplink control information (UCI) associated with the CG-PUSCH includes first indicative information, the first indicative information includes itself the end position of the first transmission packet and indicative information about the shared time SOT.

Specifically, the first indicative information includes a first information field and a second information field. The first information field is used to indicate the end position of the first transmission packet. For example, the first information field of the first indicative information in time block n includes 2 bits used to indicate that the end position of the first transmission packet is located in the current time block (00), next time block n+1 (01), time block n+2 (10) and time block n+3 (11). The second information field is used to indicate the shared time span COT. For example, the second information field of the first indicative information in time block n includes 2 bits used to indicate that the number of time blocks included in the shared time slot COT is 1 (00), 2 (01), respectively, 3 (10) and 4 (11). Optionally, the symbol in the final time block, which is the final symbol of the first transmission burst or the final symbol within the shared time slot COT, can be configured by the network device with higher layer information.

For example, as shown in FIG. 4, the UE transmits the first indication information 1011 in time block n, transmits the first indication information 0111 in time block n+1, and transmits the first indication information 0011 in time block n+2. After receiving the first indicative information, the gNB may determine that the COT resources that the gNB can share during the UE-initiated COT time include time block n+3, time block n+4, time block n+5, and time block n +6.

It should be understood that in FIG. 4 illustrates the transmission of the first indicative information in each of the plurality of time blocks. In this case, the loss of the first indicative information can be avoided. In this embodiment of the present invention, the first indicative information may alternatively be transmitted in only one time block. The time block shown in FIG. 4 may be a slot, symbol, half-slot, subframe, or the like.

For example, as shown in FIG. 5, during the UE-initiated COT time, when the UE transmits the CG-PUSCH in subframe n, the first indicative information in the uplink control information (UCI) associated with the CG-PUSCH includes 1-bit indicative information, and with the 1-bit indication information, the UE may indicate whether the n+X subframe refers to a resource that can be provided to the gNB for transmission during the user equipment (UE) COT time (or whether the n+X subframe refers to resource shared by the UE with the gNB). The X value is a higher level configuration parameter and its value is in the range 1<X<5. When the n+X subframe refers to a resource that the gNB can use during the user equipment (UE) COT, the gNB implements the Cat-2 LBT scheme before transmission in the n+X subframe, and can perform downlink data transmission after successful completion of the LBT. As shown in FIG. 5, the value of X of the higher layer configuration is 3. The UCI circuit shown in FIG. 5 only indicates that the UCI is being transmitted on the CG-PUSCH, but does not represent the resource occupied by the actual transmission of the UCI. For the convenience of the schematic representation in Fig. 5 does not show the third transmission packet.

It should be understood that the use of each parameter in the first indicative information has been described above. However, it should be understood that this embodiment of the present invention is not limited to this solution. Each parameter in the first indicative information in this embodiment of the present invention may be further used for a different purpose, and the details will not be described again hereinafter.

The first transmission packet has been mostly described above, and the second transmission packet and the third transmission packet will be described below.

Optionally, in this embodiment of the present invention, the second transmission packet is a transmission packet transmitted by the network device to the first terminal or the second terminal.

Specifically, after the network device identifies the second transmission packet based on the first indicative information, the downlink or signal may be transmitted using the second transmission packet, wherein the downlink or signal may be transmitted by broadcast or multicast, or it may be transmitted in unicast mode.

Optionally, the second transmission burst may be used to transmit at least one of the following types of information: a PDSCH (which may be a unicast PDSCH); management information within the initial access procedure; management information within the random access procedure; management information used for mobility management; paging messages; reference signal; a PDCCH for a specific UE; handover commands; common channel PDCCH; paging message; block of the clock signal (block of the clock signal / RVSN, SSB); and indicative information in the downlink feedback order (eg, downlink HARQ). Said PDCCH and reference signal may be a PDCCH and a reference signal that occur separately, i. e. are not associated with the unicast PDSCH.

The specified UE-specific PDCCH that is transmitted by the second transmission burst may be the PDCCH of the first terminal.

For example, the first transmission packet may carry said second indicative information used to issue a scheduling request to the first terminal; and hence the second transmission packet may carry the PDCCH used for scheduling the first terminal.

Alternatively, the PDCCH for a particular UE may be the PDCCH of the second terminal, i. e. PDCCH for scheduling the second terminal. In this case, the first transmission packet may not carry said second indicative information.

Alternatively, the PDCCH for a particular UE may be the PDCCH of the third terminal, where the first terminal and the second terminal may not have the same QCL assumption.

Optionally, the target of the second transmission packet in this embodiment of the present invention may be a device other than the first terminal. In this case, the second transmission packet may be used to transmit information for the second terminal, for example: the PDSCH; management information within the initial access procedure; management information within the random access procedure; management information used for mobility management; paging messages; a PDCCH for a specific UE; handover commands; paging message; and indicative information coming in the order of feedback on the downlink.

Said downlink indicative information may be feedback for the first transmission burst, such as feedback for PUSCH transmission by the first transmission burst.

Optionally, in this embodiment of the present invention, the channel or signal transmitted by the second transmission burst may be a channel or signal that occurs periodically. If the terminal determines that the network device needs to transmit a periodic channel or signal during the COT, then the first terminal may share the second transmission packet with the network device.

For example, if the user equipment (UE) transmits the CG-PUSCH, if the user equipment (UE) needs to take up many temporary resources (for example, with a large number of required services transmitted on the uplink) during the UE-initiated COT time, but the temporary resources, occupied for CG-PUSCH transmission include the periodic resource used by the gNB to transmit the high priority channel or signal (eg, PDCCH), the UE may reserve the portion of the resource to be used by the gNB and continue to transmit the CG-PUSCH. or S-PUSCH after the gNB has finished using that resource.

For example, as shown in FIG. 6, during CG-PUSCH transmission during UE-initiated COT time, the user equipment (UE) detects a PDCCH resource occurring periodically at the gNB; and hence the UE terminates the transmission of the CG-PUSCH (eg, the first transmission burst) to the PDCCH resource and indicates - through the first indicative information - that the PDCCH resource occurring periodically at the gNB (eg, the second transmission burst) belongs to a resource within the COT of a user equipment (UE), and the UE shares the resource to be used by the gNB. In addition, after the end of the second transmission burst, the UE continues to transmit the PUSCH through the third transmission burst.

Optionally, in the example shown in FIG. 6, it is envisaged that since the UE knows the position of the PDCCH resource periodically occurring at the gNB (e.g., the second transmission burst), the UE can stop the first transmission burst before the PDCCH resource and does not need to send the first indication information to issue an indication to the gNB.

Optionally, in this embodiment of the present invention, a channel or signal other than a unicast downlink data channel may be referred to as a high priority channel or signal. In this case, the high priority channel or signal may be transmitted via the second transmission burst.

Optionally, no unicast PDSCH may be transmitted via the second transmission burst.

Optionally, in this embodiment of the present invention, the duration of the second transmission burst may be less than or equal to the predetermined duration. In other words, the duration during which the network device transmits on the downlink via the second transmission burst cannot exceed a predetermined duration, for example, 1 ms.

Optionally, in this embodiment of the present invention, the category of the downlink or signal transmitted by the network device using the second transmission burst may be determined based on the available duration of the second transmission burst and/or the remaining available duration within the COT.

Optionally, in this embodiment of the present invention, the second transmission burst may include third indicative information, and the third indicative information is used for scheduling uplink data transmission by the first terminal. For example, the third indicative information may be carried on the PDCCH. In this case, the first terminal may send a scheduling request, i. e. said second indicative information by means of the first transmission packet.

The information transmitted by the second transmission packet includes fourth indicative information, and the fourth indicative information is used to determine at least one of the following kinds of information:

the channel access scheme of the third transmission packet, the start position of the third transmission packet, the length of the third transmission packet, the end position of the second transmission packet, and the end position of the COT.

Optionally, the fourth indicative information is further used to determine the channel access scheme of the fourth transmission burst and/or the channel access scheme sub-scheme of the fourth transmission burst (eg, based on service priority in Cat-4 LBT). The fourth transmission burst is not related to COT.

Like the first indicative information, the fourth indicative information included in the second transmission burst can be used to determine the location of the third transmission burst, the channel access scheme implemented before the third transmission burst, and the like.

Optionally, in this embodiment of the present invention, the third transmission packet is a transmission packet transmitted to the network device by the first terminal or the second terminal.

The receiving side of the second transmission packet may or may not be the same as the transmitting side of the third transmission packet. For example, if the second transmission packet transmits the downlink or signal in unicast mode, the third transmission packet may be used to transmit a feedback signal or a receive side response for the downlink or signal; or, if the second transmission packet transmits a downlink channel or signal in a broadcast manner, the channel or signal transmitted by the third transmission packet may not be related to the channel or signal transmitted by the second transmission packet.

Optionally, the third transmission burst is used to transmit at least one of the following information: PUSCH, HARQ-ACK (Hybrid Automatic Repeat Request) information, random access preamble, scheduling request, sounding reference, and channel status information.

Alternatively, the second transmission packet is a transmission packet transmitted by the network device to the first terminal or the second terminal, and the third transmission packet may be a D2D transmission packet, eg, a transmission packet between the first terminal and the second terminal.

Optionally, via the first transmission burst, the first terminal further transmits to the second terminal indicative information used by the second terminal to determine the third transmission burst during the HOT.

Optionally, in this embodiment of the present invention, the transmission of the second transmission packet may limit the transmission of the third transmission packet.

For example, the transmission duration of the second transmission burst may limit the category of the channel or signal transmitted by the third transmission burst. For example, the category of the channel or signal transmitted via the second transmission burst may restrict the category of the channel or signal transmitted via the third transmission burst. For example, the category of the channel or signal transmitted by the second transmission burst may limit the transmission duration of the channel or signal transmitted by the third transmission burst.

And vice versa, i.e. the transmission of the third transmission packet may limit the transmission of the second transmission packet.

Optionally, this embodiment of the present invention provides that when the channels transmitted by the second transmission burst include a PDSCH, the information transmitted by the third transmission burst includes a high priority channel or signal. The third transmission packet is used to transmit at least one of the following types of information:

HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment), random access preamble, scheduling request, sounding reference, and channel state information.

The third transmission burst is used to transmit HARQ-ACK information, the HARQ-ACK information including HARQ-ACK information corresponding to the PDSCH.

In particular, if the user equipment (UE) should take only a few time resources within the UE-initiated COT time when the user equipment (UE) transmits the CG-PUSCH, then the UE may share the resource within the COT with the gNB so that the node gNB could send PDSCH using this resource. Optionally, the downlink transmission is a downlink transmission by the UE. Optionally, the downlink transmission may have the same QCL (or the same QCL assumption) as the UE's downlink transmission; or the downlink transmission has the same Rx spatial parameter as the UE's downlink transmission. Accordingly, so that the HARQ information corresponding to the PDSCH that is transmitted by the gNB can be transmitted back to the gNB as quickly as possible, the PUCCH resources used to transmit the HARQ information may also share the user equipment (UE) COT.

For example, as shown in FIG. 7, after the user equipment (UE) completes the transmission of the CG-PUSCH (eg, the first transmission burst) within the UE-initiated COT time, it signals that subsequent shared resources (eg, the resource following the the first transmission packet within the COT). The gNB transmits the PDSCH to the UE using a share of the shared resources (eg, the resource included in the second transmission packet) and signals that the UE can transmit HARQ information corresponding to the PDSCH using the other share of the resources (eg, the resource included in the third transmission packet) during the COT time.

Therefore, when a user equipment (UE) COT is used in conjunction with a gNB to transmit the PDSCH, since the HARQ information corresponding to the PDSCH can be sent back if only a few resources are required, the use of a resource within the COT to transmit information can be allowed. HARQ corresponding to the PDSCH after the end of the transmission packet of the gNB within the COT of the user equipment (UE), which reduces the delay of the HARQ feedback.

Optionally, when the third transmission burst is used to transmit the HARQ-ACK information, the channel occupancy time of the third transmission burst is less than or equal to the first predetermined duration, eg, 1 ms.

It is optionally provided that when the channels transmitted by the second transmission burst include a PDSCH, the duration of the third transmission burst is less than or equal to the first predetermined duration, eg 1 ms.

Optionally, the first predetermined duration may be preset in the first terminal according to the protocol, or it may be configured on the network side.

Optionally, in this embodiment of the present invention, it is provided that when the second transmission packet includes the unicast PDSCH, the third transmission packet is used to transmit the HARQ-ACK information, wherein the HARQ-ACK information includes the HARQ-ACK information corresponding to the unicast PDSCH. Optionally, it is further provided that the duration of the third transmission burst is less than or equal to the first predetermined duration.

Optionally, in this embodiment of the present invention, it is provided that when the second transmission burst is used to transmit a high priority channel or signal, for example, including at least one of such information as control information within the initial access control information, random access control information, control information used for mobility management, paging message, reference signal, UE-specific PDCCH, handover command, PDCCH common channel, paging message, sync block (SSB), and indicative feedback information on the downlink, the third transmission burst may be used to transmit the PUSCH. The above PDCCH and the reference may be the PDCCH and the reference that occur separately, i.e. are not associated with the unicast PDSCH.

In particular, if when transmitting the CG-PUSCH by the user equipment (UE), the transmission time of the CG-PUSCH includes the time resource used by the gNB to transmit the periodic signal or the high priority channel, then the UE may share with the gNB a portion of the resource to transmit , and the UE will continue to transmit the PUSCH after the gNB completes its transmission. The PUSCH that the UE continues to transmit may be a CG-PUSCH or an S-PUSCH.

Optionally, this embodiment of the present invention provides that when a second transmission burst is used to transmit a signal or a channel including a PDSCH, the channel occupancy time of the second transmission burst will be less than or equal to a predetermined duration, such as 1 ms. It is optionally provided that when the second transmission burst is used to transmit a signal or a high priority channel, the channel occupancy time of the second transmission burst will be less than or equal to a predetermined duration.

Optionally, this embodiment of the present invention provides that when the channel occupancy time of the second transmission burst is less than or equal to a predetermined duration, such as 1 ms, the third transmission burst may be used to transmit the PUSCH.

Optionally, this embodiment of the present invention provides that when the channel occupancy time of the second transmission burst is less than or equal to a predetermined duration, such as 1 ms, the third transmission burst can be used for D2D transmission.

Optionally, the predetermined duration may be set in the network device or terminal according to the protocol, or it may be configured on the network side.

It should be understood that the solution implemented in the method 200 of this embodiment of the present invention can also be used for a D2D communication scenario; those. said network device may be replaced by a terminal, which may be, for example, a different terminal than the first terminal, and a different terminal may be the second terminal described below, or not the second terminal described below.

It should also be understood that in this embodiment of the present invention, the first terminal may not transmit the first indicative information via the first transmission packet. For example, after the network device receives the uplink data transmitted by the first terminal via the first transmission packet, it is provided that if the interval between the start position of the downstream transmission packet and the end position of the upstream transmission packet is less than or equal to 16 μs, then the network device can perform downlink transmission immediately; or, if this interval is greater than 16 μs but less than or equal to 25 μs, then the UE may implement a Cat-2 LBT scheme before transmission.

In FIG. 8 is a flowchart illustrating an implementation flow of a wireless communication method 300 for unlicensed spectrum according to one embodiment of the present invention. The first device described below may be a terminal and the second device may be a network device; or the first device may be a terminal and the second device may also be a terminal.

In step 310, the first device transmits the first indicative information to the network device via a first transmission burst during the channel busy time (COT) received by the first device, the first indicative information being used to determine at least one of the following types of information:

whether the first device shares the resource during the COT; channel access schemes of the second transmission burst during COT; end position of the first transmission packet; the start position of the second transmission packet; the length of the second transmission packet; the final position or the remaining duration of the COT; QCL relationship between channels or signals transmitted by the first transmission burst; QCL relationships between channels or signals to be transmitted by the second transmission packet; and an interval between the end position of the first transmission packet and the start position of the second transmission packet.

At 320, the second device receives the first indicative information.

The information about whether the first device shares the resource during the COT may indicate whether the first device shares the resource during the COT or not. For example, 1 indicates to share, and 0 indicates not to share.

The channel access scheme of the second transmission burst may indicate the channel access scheme used by the second device to implement LBT before the second transmission burst. The channel access scheme may be a Cat-1 LBT scheme or a Cat-2 LBT scheme. Accordingly, 1 bit may be used to indicate whether the corresponding channel access scheme is a Cat-1 LBT or Cat-2 LBT scheme. Because there are two candidate schemes for providing channel access, channel access schemes may differ in the use of bit 1.

The interval between the end position of the first transmission burst and the start position of the second transmission burst may be used by the second device to determine the channel access scheme used for the LBT operation performed before the second transmission burst.

The start position of the second transmission packet indicates to the second device the position at which the second transmission packet begins. Based on the start position of the second transmission burst, the second device can determine, based on the end position of the first transmission burst and the start position of the second transmission burst, the interval between the two positions and accordingly determine the channel access scheme for the LBT operation performed before the second transmission burst.

For example, if the interval between the end position of the first transmission burst and the start position of the second transmission burst is less than or equal to 16 µs, then the gNB may, for example, transmit data immediately after the end of the interval using a Cat-1 LBT scheme.

In another example, if the interval between the end position of the first transmission burst and the start position of the second transmission burst is greater than 16 µs, then the gNB may transmit upon successful completion of the LBT using a Cat-2 LBT scheme.

When the second device determines that the start position of the second transmission burst and the symbol start position at which the second device transmits payload information by the second transmission burst do not match, the second device can transmit the signal by puncturing or by increasing the length of the cyclic prefix.

The length of the second transmission burst indicates the size of the time domain resource that the second device can use to transmit data. In this case, the second device can set the number of common resources within the COT that can efficiently use the high priority channel access scheme, thereby allowing more accurate scheduling of downlink data transmission.

The end position of the first transmission packet indicates to the second device the position where the first transmission packet ends. The second device can determine the start position of the second transmission packet based on the end position of the first transmission packet, and also determine the channel access scheme based on the size of the interval between the start position of the second transmission packet and the end position of the first transmission packet or the range to which the size of this interval belongs.

The end position or remaining duration of the COT allows the network device to know the position at which the COT ends. Therefore, the second device can determine the end position or length of the second transmission packet such that the second transmission packet does not exceed the COT; or, between the end position of the second transmission burst and the end position of the COT, a specific resource is reserved, which is used for the third transmission packet, and the second device can set the number of common resources within the COT that can effectively use the high priority channel access scheme, thereby providing more precise scheduling of downlink data transmission.

The QCL relationship between channels or signals transmitted by the first transmission burst may indicate the Tx spatial parameter or the Rx spatial parameter used by the first terminal, whereby the second device can transmit the second transmission burst using the corresponding spatial parameter.

Alternatively, the first indicative information may carry information defining the spatial parameter QCL of the channel or signal transmitted by the second transmission burst so that the second device can directly transmit the second transmission packet using the corresponding spatial QCL parameter.

In particular, in the NR-U system, the channel access method or the signal transmission method may be directional. Therefore, when indicating the COT-related parameter, the terminal can simultaneously indicate the QCL of the user equipment (UE), for example, the data-related SSB index or CSI-RS of the user equipment (UE). After receiving the QCL assumption indicator, the network device can use the resource during the shared COT time to transmit to the UE with the same QCL assumption.

Optionally, the first indicative information and/or the second indicative information in this embodiment of the present invention is carried by UCI or DMRS information.

The DMRS signal may be used to demodulate the PUSCH. In this case, the first transmission packet may carry a PUSCH. The DMRS signal may be an associated PUSCH DMRS signal.

It should be understood that when the first indication information is carried by the UCI information, the first transmission packet may alternatively transmit a PUSCH. In this case, the UCI may be associated with the PUSCH.

With regard to the first indicative information, it can be said that from the plurality of demodulation reference signals and based on the content to be carried by the indicative information, the first device selects the demodulation reference signal used to carry the indicative information. Accordingly, the network device can detect the content set from the plurality of content sets based on the demodulation reference signal.

For example, the network device may configure at least two parameter sets by higher layer signals, and each parameter set includes information such as the end position of the first transmission packet; the remaining length or end position of the UE-initiated COT time; a QCL relationship between channels or signals transmitted by the first transmission packet or the second transmission packet; whether the second transmission packet is shared with the UE by the transmission packet; and a channel access scheme corresponding to the second transmission burst. Therefore, the demodulation reference signal sequence (DMRS) to be transmitted can be determined based on the parameter set to be used, so that the network device can determine the appropriate parameter set based on the DMRS sequence.

Transferring information by a DMRS sequence may refer to transferring information by selecting a different DMRS sequence. Therefore, the DMRS sequence is generally applicable to the indication of relatively small amount of information. When more parameters from the corresponding parameter set are shared during COT, the determination can be made by combining higher layer signaling configuration and DMRS selection.

Optionally, when the terminal transmits the scheduled PUSCH (S-PUSCH) to the network device via the first transmission burst, the first indication information may be carried in a reference signal that is used to demodulate the S-PUSCH. For example, the network device allocates two DMRS sequences to the UE, and the UE selects the corresponding DMRS sequence based on whether the resource can be shared during the COT.

Optionally, when the UE transmits the configured Granted Access Channel PUSCH (CG-PUSCH) to the network device via the first transmission burst, the first indication information may be carried by uplink control information (UCI) associated with the CG-PUSCH.

Therefore, in this embodiment of the present invention, the first device transmits the second indicative information to the second device by means of the first transmission burst during the channel busy time (COT) received by the first device, the first indicative information being used to determine at least one of the following types information: whether the first device shares the resource during COT; channel access schemes of the second transmission burst during COT; end position of the first transmission packet; the start position of the second transmission packet; the length of the second transmission packet; the final position or the remaining duration of the COT; QCL relationship between channels or signals transmitted by the first transmission burst; QCL relationships between channels or signals to be transmitted by the second transmission packet; and an interval between the end position of the first transmission packet and the start position of the second transmission packet. The first device may transmit via the second transmission packet via the first information.

In FIG. 9 shows a flowchart of a wireless communication method 400 for unlicensed spectrum according to one embodiment of the present invention. Method 400 may be implemented by a terminal or network device.

At step 410, channel detection is performed during a first detection duration in the unlicensed spectrum, wherein the first detection duration is greater than 16 microseconds but less than or equal to 25 microseconds; the first detection duration includes at least one detection slot; and the detection slot is located at the start point or the end point of the first detection duration. The detection described herein may be a Cat-2 LBT.

Optionally, in this embodiment of the present invention, the channel detection process may be a detection slot detection process, and the process is as follows: if a channel is detected in the detection slot by the communication device, and the power captured by the communication device in the detection slot for, at least a predetermined duration of time, such as 4 μs, is less than the energy detection threshold, then this detection slot is considered free; otherwise, this detection slot is considered occupied. Optionally, the energy detection threshold is predetermined or calculated from a formula agreed upon in the protocol.

Optionally, the duration of detection in this embodiment of the present invention may be less than or equal to the interval between adjacent transmission bursts.

For example, when the interval length exceeds 25 μs, the detection duration is 25 μs. In another example, it is provided that when the duration of the interval is less than or equal to 25 μs, the duration of the detection is equal to this interval.

Optionally, in this embodiment of the present invention, based on the first detection duration, at least one of the number of detection slots, the duration of the detection slot, and the location of the detection slot can be determined.

Specifically, when the interval size between two transmission packets within the same COT is variable, the communication device can perform channel detection using the Cat-2 LBT scheme, and how to perform channel detection using the Cat-2 LBT scheme , is determined based on the interval size. For example, based on the interval size, at least one of the number of detection slots, the length of the detection slot, and the location of the detection slot can be determined.

It should be understood that the decision to determine at least one of such parameters as the number of detection slots, the duration of the detection slot, and the location of the detection slot, based on the first duration of the detection, can be used for another scenario, which, for example, is not limited to the scenario, wherein the first detection duration is greater than 16 microseconds but less than or equal to 25 microseconds.

Optionally, in this embodiment of the present invention, at least one detection slot includes a first detection slot located at the start point of the first detection duration. The duration of the first detection slot may be 9 μs, or another duration may be set, such as 8 μs.

Optionally, in this embodiment of the present invention, at least one detection slot includes a second detection slot located at the end point of the first detection duration of the first detection duration. The duration of the second detection slot may be 9 μs, or another duration may be set, such as 8 μs.

It should be understood that in this embodiment of the present invention, the first detection slot may coexist with the second detection slot. For example, as shown in FIG. 10, the duration of detection in Y µs may include a CCA (Channel Idle Detection) slot of Z1 µs and a CCA slot of Z2 µs. Alternatively, either a first detection slot or a second detection slot may be provided.

The following is a description using an example in which both the first detection slot and the second detection slot are included.

In one embodiment of the present invention, the duration of the first detection slot is 9 microseconds and the duration of the second detection slot is 9 microseconds. In this case, the first detection duration is optionally greater than or equal to 18 microseconds and less than or equal to 25 microseconds.

In another embodiment of the present invention, the duration of the first detection slot is 8 microseconds and the duration of the second detection slot is 8 microseconds. In this case, optionally, the first detection duration is greater than or equal to 18 microseconds and less than or equal to 25 microseconds, or the first detection duration is greater than or equal to 17 microseconds and less than 18 microseconds, or the first detection duration is greater than 16 microseconds and less than 17 microseconds.

In yet another embodiment of the present invention, the duration of the first detection slot is 8 microseconds and the duration of the second detection slot is 9 microseconds. In this case, optionally, the first detection duration is greater than or equal to 16 microseconds, but less than or equal to 25 microseconds; or the first detection duration is greater than or equal to 17 microseconds but less than 18 microseconds.

In yet another embodiment of the present invention, the duration of the first detection slot is 9 microseconds and the duration of the second detection slot is 8 microseconds. In this case, the first detection duration is greater than or equal to 18 microseconds but less than or equal to 25 microseconds, or the detection duration is greater than or equal to 17 microseconds but less than 18 microseconds.

In yet another embodiment of the present invention, the duration of the first detection slot is Z1 microseconds and the duration of the second detection slot is (Y-Z1) microseconds. For example, the duration of the first detection slot is 9 microseconds and the duration of the second detection slot is (Y-9) microseconds, where the value of Y indicates the first duration of detection, and optionally the value of Y is greater than 16 microseconds, but less than or equal to 25 microseconds.

In yet another embodiment of the present invention, the duration of the second detection slot is Z2 microseconds and the duration of the first detection slot is (Y-Z2) microseconds. For example, the duration of the second detection slot is 9 microseconds and the duration of the first detection slot is (Y-9) microseconds, where the value of Y indicates the first duration of detection, and optionally the value of Y is greater than 16 microseconds, but less than or equal to 25 microseconds.

Optionally, in this embodiment of the present invention, it is provided that when the duration of the detection slot is a variable, for example, the value of Y is greater than 16 microseconds but less than or equal to 25 microseconds, the duration of the detection slot is (Y-9) microseconds, t .e. the duration of the detection slot is greater than 7 microseconds but less than or equal to 16 microseconds, and the detection process in the detection slot is as follows: if a channel is detected by the communication device in the variable duration detection slot, and the power captured by the communication device in the variable duration detection slot for at least If a predetermined time duration, such as 4 μs, is less than the energy detection threshold, then this variable duration detection slot is considered free; otherwise, this variable duration detection slot is considered occupied.

Therefore, when the first detection duration exceeds 16 microseconds but is less than or equal to 25 microseconds, detection can be performed in at least one detection slot at the start point or end point of the first detection duration to realize detection for a detection duration that exceeds 16 microseconds, but less than or equal to 25 microseconds.

It should be understood that the methods according to the embodiments of the present invention may be combined and used in conjunction. For example, method 100 may be used within method 200 and method 300; method 200 may be used within methods 100 and 300, and similarly, method 300 may also be used within methods 100 and 200.

In FIG. 11 shows a block diagram of an unlicensed spectrum terminal 500 according to one embodiment of the present invention. Terminal 500 includes a communication module 510.

The communication module 510 is configured to transmit the first indicative information to the network device via the first transmission packet during the channel busy time (COT) received by the terminal, wherein the COT includes the second transmission packet and the third transmission packet, and the first indicative information is used by the network device to determine the second transmission packet within the COT.

Optionally, in this embodiment of the present invention, the second transmission packet is a transmission packet transmitted by the network device to the terminal or the second terminal; and/or the third transmission packet is a transmission packet transmitted by the terminal or the second terminal to the network device.

Optionally, in this embodiment of the present invention, the terminal and the second terminal are characterized by the same quasi-co-location (QCL) assumption.

Optionally, in this embodiment of the present invention, the channels transmitted via the second transmission burst include a Physical Downlink Shared Channel (PDSCH).

Optionally, in this embodiment of the present invention, the third transmission burst is used to transmit at least one of the following types of information: HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment) information, random access preamble, scheduling request , a probing reference signal, and channel state information.

Optionally, in this embodiment of the present invention, the third transmission burst is used to transmit HARQ-ACK information, wherein the HARQ-ACK information includes HARQ-ACK information corresponding to the PDSCH.

Optionally, this embodiment of the present invention provides that when the channels transmitted by the second transmission burst include a PDSCH, the duration of the third transmission burst will be less than or equal to the first predetermined duration.

Optionally, in this embodiment of the present invention, the second transmission packet is used to transmit at least one of the following types of information: control information within the initial access procedure; management information within the random access procedure; management information used for mobility management; paging messages; reference signal; a PDCCH for a specific UE; handover commands; common channel PDCCH; paging message; clock block (SSB); and indicative information in the order of feedback on the downlink.

Optionally, in this embodiment of the present invention, the channels transmitted via the second transmission burst do not include any unicast PDSCH.

Optionally, in this embodiment of the present invention, the duration of the second transmission burst is less than or equal to the second predetermined duration.

Optionally, in this embodiment of the present invention, the channels transmitted via the third transmission burst include a physical uplink common channel (PUSCH).

Optionally, in this embodiment of the present invention, the information transmitted by the first transmission burst includes second indicative information, the second indicative information being used to request the network device to schedule uplink data for the terminal.

Optionally, in this embodiment of the present invention, the communication module 510 is further configured to receive, via the second transmission burst, the third indicative information transmitted by the network device, the third indicative information being used for scheduling data transmission by the terminal on the uplink.

Optionally, in this embodiment of the present invention, the first indicative information is used to determine at least one of the following types of information: the channel access scheme of the second transmission packet, the start position of the second transmission packet, the length of the second transmission packet, the end position of the first of the transmission burst, the end position of the COT, the QCL relationship between channels or signals transmitted by the first transmission burst, and the interval between the end position of the first transmission burst and the start position of the second transmission burst.

Optionally, in this embodiment of the present invention, the information transmitted by the second transmission burst includes fourth indicative information, and the fourth indicative information is used to determine at least one of the following kinds of information:

the channel access scheme of the third transmission packet, the start position of the third transmission packet, the length of the third transmission packet, the end position of the second transmission packet, and the end position of the COT.

It should be understood that terminal 500 may be identical to the first terminal used in implementing the described embodiment of the proposed method and may perform corresponding operations performed by the first terminal. For brevity, the details are not repeated hereinafter.

In FIG. 12 shows a block diagram of an unlicensed spectrum communication device 600 according to one embodiment of the present invention. The communication device 600 includes a communication module 610 .

The communication module 610 is configured to transmit the first indicative information to the network device via a first transmission burst during a channel busy time (COT) received by the communication device, the first indicative information being used to determine at least one of the following types of information:

whether the communication device shares a resource during the COT; channel access schemes of the second transmission burst during COT; end position of the first transmission packet; the start position of the second transmission packet; the length of the second transmission packet; the final position or the remaining duration of the COT; QCL relationship between channels or signals transmitted by the first transmission burst; QCL relationships between channels or signals to be transmitted by the second transmission packet; and an interval between the end position of the first transmission packet and the start position of the second transmission packet.

Optionally, in this embodiment of the present invention, the first indicative information is carried by uplink control information (UCI) or a demodulation reference signal.

Optionally, in this embodiment of the present invention, the first indicative information is carried in a demodulation reference signal, and the communication device 600 further includes a data processing unit 620, configured to further select by the communication device 600 from a plurality of demodulation reference signals based on content, to be carried in the first indicative information, a demodulation reference signal used to carry the first indicative information.

Optionally, in this embodiment of the present invention, the UCI information or the demodulation reference is the associated UCI information or the associated demodulation reference of the PUSCH transmitted by the communication device, the PUSCH being transmitted by the first transmission burst.

Optionally, in this embodiment of the present invention, the communication device is a terminal and the second device is a network device; or

the communication device is a terminal, and the second device is a terminal.

It should be understood that the communication device 600 may be configured to perform the corresponding operations implemented by the first device within a particular embodiment of the proposed method. For brevity, the details are not repeated hereinafter.

In FIG. 13 shows a block diagram of an unlicensed spectrum communications apparatus 700 according to one embodiment of the present invention. The communication device 700 includes a communication module 710.

The communication module 710 is configured to detect a channel during a first detection duration in the unlicensed spectrum, wherein: the first detection duration is greater than 16 microseconds but less than or equal to 25 microseconds; the first detection duration includes at least one detection slot; and the detection slot is located at the start point or the end point of the first detection duration.

Optionally, in this embodiment of the present invention, the communication device 700 further includes a data processing module 720 configured to:

determining at least one of the number of detection slots, the duration of the detection slot, and the location of the detection slot, based on the first duration of the detection.

Optionally, in this embodiment of the present invention, at least one detection slot includes a first detection slot located at the start point of the first detection duration.

Optionally, in this embodiment of the present invention, at least one detection slot includes a second detection slot located at the end point of the first detection duration.

Optionally, in this embodiment of the present invention, detection slots in the amount of at least one detection slot include a first detection slot and a second detection slot, which are located at the start point and end point of the first detection duration, wherein :

the duration of the first detection slot is 9 microseconds, and the duration of the second detection slot is 9 microseconds.

Optionally, in this embodiment of the present invention, detection slots in the amount of at least one detection slot include a first detection slot and a second detection slot, which are located at the start point and end point of the first detection duration, wherein :

the duration of the first detection slot is 8 microseconds, and the duration of the second detection slot is 8 microseconds.

Optionally, in this embodiment of the present invention, detection slots in the amount of at least one detection slot include a first detection slot and a second detection slot, which are located at the start point and end point of the first detection duration, wherein :

the duration of the first detection slot is 8 microseconds, and the duration of the second detection slot is 9 microseconds.

Optionally, in this embodiment of the present invention, detection slots in the amount of at least one detection slot include a first detection slot and a second detection slot, which are located at the start point and end point of the first detection duration, wherein :

the duration of the first detection slot is 9 microseconds, and the duration of the second detection slot is 8 microseconds.

Optionally, in this embodiment of the present invention, the first detection duration is greater than or equal to 18 microseconds, but it is less than or equal to 25 microseconds.

Optionally, in this embodiment of the present invention, the first detection duration is greater than or equal to 17 microseconds, but less than 18 microseconds.

Optionally, in this embodiment of the present invention, the first detection duration is greater than 16 microseconds, but it is less than 17 microseconds.

Optionally, communication device 700 may be configured to perform appropriate operations implemented by a terminal or network device within the described embodiment of the method. For brevity, the details are not repeated hereinafter.

In FIG. 14 shows a block diagram of an unlicensed spectrum network device 800 according to one embodiment of the present invention. The network device 800 includes a communication module 810.

The communication module 810 is configured to receive the first indicative information transmitted by the first terminal, the first indicative information being transmitted by the first transmission burst during the channel busy time (COT) received by the first terminal, wherein:

the COT time comprises the second transmission packet and the third transmission packet, and the first indicative information is used by the network device to determine the second transmission packet within the COT.

Optionally, in this embodiment of the present invention, the second transmission packet is a transmission packet transmitted by the network device to the first terminal or the second terminal; and/or the third transmission packet is a transmission packet transmitted by the first terminal or the second terminal to the network device.

Optionally, in this embodiment of the present invention, the first terminal and the second terminal have the same quasi-co-location (QCL) assumption.

Optionally, in this embodiment of the present invention, the channels transmitted via the second transmission burst comprise a Physical Downlink Shared Channel (PDSCH).

Optionally, in this embodiment of the present invention, the third transmission burst is used to transmit at least one of the following types of information:

HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment), random access preamble, scheduling request, sounding reference, and channel state information.

Optionally, in this embodiment of the present invention, the third transmission burst is used to transmit HARQ-ACK information, wherein the HARQ-ACK information includes HARQ-ACK information corresponding to the PDSCH.

Optionally, in this embodiment of the present invention, it is provided that when the channels transmitted by the second transmission burst contain a PDSCH, the duration of the third transmission burst will be less than or equal to the first predetermined duration.

Optionally, in this embodiment of the present invention, the second transmission burst is used to schedule at least one of the following types of information:

management information within the initial access procedure; management information within the random access procedure; management information used for mobility management; paging messages; reference signal; a PDCCH for a specific UE; handover commands; common channel PDCCH; paging message; clock block (SSB); and indicative information coming in the order of feedback on the downlink.

Optionally, in this embodiment of the present invention, the channels transmitted via the second transmission burst do not contain any unicast PDSCH.

Optionally, in this embodiment of the present invention, the duration of the second transmission burst is less than or equal to the second predetermined duration.

Optionally, in this embodiment of the present invention, the channels transmitted via the third transmission burst comprise a Physical Uplink Shared Channel (PUSCH).

Optionally, in this embodiment of the present invention, the information transmitted by the first transmission burst comprises second indicative information, the second indicative information being used to request the network device to schedule uplink data for the first terminal.

Optionally, in this embodiment of the present invention, the communication module is further configured to transmit third indicative information to the first terminal via a second transmission burst, the third indicative information being used for scheduling uplink data transmission by the first terminal.

Optionally, in this embodiment of the present invention, the first indicative information is used to determine at least one of the following types of information:

the channel access scheme of the second transmission burst, the start position of the second transmission burst, the length of the second transmission burst, the end position of the first transmission burst, the end position of the COT, the QCL relationship between channels or signals transmitted by the first transmission burst, and the spacing between the end position of the first transmission burst and the start position of the second transmission packet.

Optionally, in this embodiment of the present invention, the information transmitted by the second transmission burst includes fourth indicative information, the fourth indicative information being used to determine at least one of the following types of information: channel access schemes of the third burst transmission, the start position of the third transmission burst, the length of the third transmission burst, the end position of the second transmission burst, and the end position of the COT.

Optionally, network device 800 may be configured to perform appropriate operations implemented by a terminal or network device within the described embodiment of the proposed method. For brevity, the details are not repeated hereinafter.

In FIG. 15 shows a block diagram of an unlicensed spectrum communication device 900 according to one embodiment of the present invention.

The communication device 900 includes a communication module 910.

The communication unit 910 is configured to receive the first indicative information transmitted by the network device, wherein the first indicative information is transmitted by the first device via a first transmission burst during the channel busy time (COT) received by the first device, and the first indicative information is used to determine at least , one of the following types of information: whether the first device shares a resource during COT; channel access schemes of the second transmission burst during COT; end position of the first transmission packet; the start position of the second transmission packet; the length of the second transmission packet; the final position or the remaining duration of the COT; QCL relationship between channels or signals transmitted by the first transmission burst; QCL relationships between channels or signals to be transmitted by the second transmission packet; and an interval between the end position of the first transmission packet and the start position of the second transmission packet.

Optionally, in this embodiment of the present invention, the first indicative information is carried by uplink control information (UCI) or a demodulation reference signal.

Optionally, in this embodiment of the present invention, the first indicative information is carried in a demodulation reference signal, and the communication device further includes a data processing unit 920, configured to select a data set from a plurality of data sets based on the demodulation reference signal carried in itself the first indicative information, and the selected data set includes information displayed by the first indicative information.

Optionally, in this embodiment of the present invention, the UCI or demodulation reference is the associated UCI information or the associated demodulation reference of the PUSCH transmitted by the network device, the PUSCH being transmitted by the first transmission burst.

Optionally, in this embodiment of the present invention, the first device is a terminal and the communication device is a network device; or

the first device is a terminal and the communication device is a terminal.

Optionally, the communication device 1000 may be configured to perform corresponding operations performed by the second device within the described embodiment of the method. For brevity, the details are not repeated hereinafter.

In FIG. 16 shows a block diagram of a communication device 1000 according to one embodiment of the present invention. Communication device 1000 shown in FIG. 16 includes a processor 1010. The processor 1010 can recall and execute a computer program to implement a method according to embodiments of the present invention.

Optionally, as shown in FIG. 16, the communication device 1000 may further include a memory 1020. The processor 1010 may recall from the memory 1020 and execute a computer program to implement a method according to embodiments of the present invention.

Memory 1020 may be a component independent of processor 1010, or it may be integrated with processor 1010.

Optionally, as shown in FIG. 16, communications device 1000 may further include a transceiver 1030. Transceiver 1030 may be controlled by processor 1010 to communicate with another device. In particular, the transceiver 1130 may transmit information or data to another device or receive information or data transmitted by another device.

The transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further comprise one or more antennas.

Optionally, the communication device 1000 may specifically be a network device according to the embodiments of the present invention, and the communication device 1000 may implement a corresponding process performed by the network device within each method according to the embodiments of the present invention. For brevity, the details are not repeated hereinafter.

Optionally, communication device 1000 may be specifically a terminal/mobile terminal according to embodiments of the present invention, and communication device 1000 may implement a corresponding process performed by the terminal/mobile terminal within each method according to embodiments of the present invention. For brevity, the details are not repeated hereinafter.

In FIG. 17 shows a block diagram of a chip according to one embodiment of the present invention. Chip 1100 shown in FIG. 17 includes a processor 1110. The processor 1110 may recall a computer program from memory 1120 and execute the computer program to implement the method according to embodiments of the present invention.

Optionally, as shown in FIG. 17, chip 1100 may further include memory 1120. Processor 1110 may recall and execute computer program from memory 1120 to implement the method according to embodiments of the present invention.

Memory 1120 may be a component independent of processor 1110, or it may be integrated with processor 1110.

Optionally, chip 1100 may further include an input interface 1130. Input interface 1130 may be controlled by processor 1110 to communicate with another device or chip. In particular, processor 1110 may receive information or data from another device or chip.

Optionally, chip 1100 may further include an output interface 1140. Output interface 1140 may be controlled by processor 1110 to communicate with another device or chip. In particular, processor 1110 may provide information or data to another device or chip.

Optionally, the chip is applicable to a network device according to embodiments of the present invention, and the chip can perform corresponding processes implemented by the network device in various ways according to embodiments of the present invention. For brevity, the details are not repeated hereinafter.

Optionally, the chip is applicable to the terminal/mobile terminal according to the embodiments of the present invention, and the chip can perform the corresponding processes implemented by the terminal/mobile terminal within various methods according to the embodiments of the present invention. For brevity, the details are not repeated hereinafter.

It should be understood that the chip specified in the embodiments of the present invention may also be referred to as a system-level chip, system chip, single-chip system, chip-based system, or otherwise.

It should be understood that the processor according to this embodiment of the present invention may be an integrated circuit chip configured to process signals. During its practical implementation, the described steps of the above-disclosed embodiment of the proposed method may be performed by a hardware integrated logic circuit in a processor or by means of software instructions. The processor may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an FPGA or other programmable logic device, a discrete logic element, or a transistorized logic element, or a discrete hardware component. The processor may perform or execute various methods, steps, and flowcharts described in the embodiments of the present invention. The general purpose processor may be a microprocessor, or any conventional processor or other similar device. The steps of the methods disclosed in connection with embodiments of the present invention may be performed directly by a hardware decoding processor executing or implementing its functions, or using a combination of hardware and software modules in a decoding processor. The program modules may be located in a storage medium commonly used in the art, such as random access memory, flash memory, read only memory, programmable read only memory, electrically erasable program read only memory or a register. The storage medium is located in the memory and the processor reads the information stored in the memory and performs the steps of the described methods in cooperation with the processor hardware.

It should be understood that the memory in embodiments of the present invention may be non-volatile or volatile memory; or it may include both non-volatile and volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory may be a random access memory (RAM) that serves as an external cache. By way of non-limiting example, random access memory (RAM) can be represented in a variety of forms, such as static RAM device (SRAM), dynamic RAM device (DRAM), synchronous dynamic RAM device (SDRAM) , Dual Rate SDRAM (DDR SDRAM), Enhanced Synchronous Dynamic RAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Resident Access Bus RAM (DR RAM). It should be noted that the memory for the system and method described herein is intended to include, among other things, these and any other memory units of a suitable type.

It should be understood that the memory described is by way of example only and is not limiting. For example, the memory in this embodiment of the present invention may also be Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Dual Rate Synchronous Dynamic Random Access Memory (DDR SDRAM) , Advanced Synchronous Dynamic Random Access Memory (ESDRAM), Synchlink Dynamic Random Access Memory (SLDRAM), Direct Resident Access Bus Random Access Memory (DR RAM), or similar device. In other words, the memory in this embodiment of the present invention is intended to include, among other things, these and other memory blocks of a suitable type.

One embodiment of the present invention further provides a computer readable storage medium for storing a computer program.

Optionally, the computer-readable storage medium is applicable to the network device according to the embodiments of the present invention, and the computer program enables the computer to execute the corresponding process implemented by the network device within each method according to the embodiments of the present invention. For brevity, the details are not repeated hereinafter.

Optionally, the computer-readable storage medium is applicable to the terminal/mobile terminal according to the embodiments of the present invention, and the computer program enables the computer to execute the corresponding process implemented by the terminal/mobile terminal within each method according to the embodiments of the present invention. For brevity, the details are not repeated hereinafter.

One embodiment of the present invention further provides a computer program product containing computer program instructions.

Optionally, the computer program product is applicable to the network device according to the embodiments of the present invention, and the computer program instructions enable the computer to perform the appropriate process implemented by the network device within each method according to the embodiments of the present invention. For brevity, the details are not repeated hereinafter.

Optionally, the computer program product is applicable to the terminal/mobile terminal according to the embodiments of the present invention, and the computer program instructions enable the computer to execute the corresponding process implemented by the terminal/mobile terminal within each method according to the embodiments of the present invention. For brevity, the details are not repeated hereinafter.

One embodiment of the present invention further provides a computer program.

Optionally, a computer program is applicable to a network device according to embodiments of the present invention. When this computer program is run on the computer, the computer is allowed to execute the corresponding process implemented by the network device within each method according to the embodiments of the present invention. For brevity, the details are not repeated hereinafter.

Optionally, a computer program is applicable to a terminal/mobile terminal according to embodiments of the present invention. When this computer program is run on the computer, the computer is allowed to execute the corresponding process implemented by the terminal/mobile terminal within each method according to the embodiments of the present invention. For brevity, the details are not repeated hereinafter.

One skilled in the art will recognize that the exemplary modules and algorithm steps described in connection with the embodiments of the claimed invention disclosed herein may be implemented in electronic hardware or a combination of electronic hardware and computer software. Whether these functions are implemented in hardware or software depends on the particular application and design constraints of the technical solutions. In each particular case, a person skilled in the art can use different methods to implement the described functions, but such an implementation should not be considered as going beyond the scope of the present invention.

The person skilled in the art should be absolutely clear that for convenience and brevity, the specific workflow of the system, device and module described above refers to the corresponding process performed within the above described embodiments of the method according to the present invention, and therefore is not re-described in this document.

It should be understood that in some embodiments of the present invention, the disclosed system, apparatus, and method may be implemented differently. For example, the device embodiment described is for illustrative purposes only. For example, the separation of modules is only a separation of logical functions, and in practice other separation options can be implemented. For example, multiple modules or components may be combined or integrated into another system; or some features may be dropped or not executed. In addition, the interconnections or direct communications or communication connections illustrated or described may be implemented via certain interfaces. Indirect connections or communication connections between devices or modules may be implemented in electrical, mechanical or other form.

Modules described as separate components may or may not be physically separated from each other; and components represented as modules may or may not be physical modules, may reside in the same location, or they may be distributed among multiple network modules. Some or all of the modules may be selected depending on the actual needs to achieve the objectives of the solutions implemented in the embodiments of the present invention.

In addition, functional modules in embodiments of the present invention may be integrated into a single data processing module, or each of the modules may be a physically separate module, or two or more modules may be combined into a single module.

When the functions are implemented as a software functional unit that is freely available on the market or used as a standalone product, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the claimed invention - in whole, in part, or in that part that improves the prior art - can be implemented in the form of a software product. The computer program product is stored in a storage medium and includes various instructions that cause a computing device (which may be a personal computer, a server, a network device, or the like) to execute all or some of the steps of the method described in a specific embodiment of the present inventions. Said storage medium includes: any medium capable of storing program codes, such as a USB flash drive, external hard drive, read only memory (ROM), random access memory (RAM), magnetic disk or optical disk.

The embodiments of the present invention described above are only some specific examples of its implementation, and the scope of legal protection of the claimed invention is not limited to them. Any person skilled in the art can easily develop any changes or replacements within the technical scope disclosed in this document, which should be included in the scope of legal protection of the claimed invention. Therefore, the scope of legal protection of the present invention should be determined by the scope of legal protection of the claims.

Claims (35)

1. A wireless communication method for the unlicensed spectrum, which includes: the first terminal transmitting the first indicative information to the network device by means of a first transmission packet during the channel busy time (COT) received by the first terminal, the first transmission packet containing a configured and grant-free physical uplink common channel (CG-PUSCH) and the uplink control information the CG-PUSCH communication link (UCI) contains first indicative information, the first indicative information being used to indicate that the first terminal is using the second transmission burst during the COT in conjunction with the network device; wherein: the second transmission packet contains channels transmitted by the network device to the first terminal; wherein, when the first indicative information is 1-bit indicative information for indicating whether the first terminal shares the resource during the COT, the channels transmitted by the second transmission burst are transmitted by broadcast or multicast, and the duration of the second transmission burst less than or equal to the second predetermined duration; wherein, when the first indicative information is used to indicate the start position of the second transmission burst and the length of the second transmission burst, the channels transmitted by the second transmission burst comprise a Unicast Physical Downlink Shared Channel (PDSCH). 2. The method according to claim 1, wherein when the channels transmitted by the second transmission packet are transmitted by broadcast or multicast mode, then the second transmission packet is used to transmit at least one of the following types of information: management information within the initial access procedure; management information within the random access procedure; management information used for mobility management; paging messages; reference signal; a PDCCH for a specific UE; handover commands; common channel PDCCH; paging message; clock block (SSB); and indicative information coming in the order of feedback on the downlink. 3. The method of claim 1, wherein the second transmission packet is a transmission packet transmitted by the network device to the second terminal, and the first terminal and the second terminal have the same quasi-collocation (QCL) assumption. 4. The method of claim 3, wherein the COT further comprises a third transmission packet, the third transmission packet comprising channels transmitted by the first terminal or the second terminal to the network device. 5. The method according to claim 1, in which: if the 1-bit indication information displays 1, then the first terminal shares the resource during the COT, and if the 1-bit indication information displays 0, then the first terminal does not share the resource during the COT. 6. The method of claim 1, wherein when the channels transmitted via the second transmission burst comprise a PDCCH, the COT further comprises a third transmission packet, wherein the third transmission burst is used to transmit at least one of the following types of information: HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment), random access preamble, scheduling request, sounding reference, and channel state information. 7. The method of claim 6, wherein the information transmitted via the first transmission packet further comprises second indicative information, and the second indicative information is used to request the network device to schedule uplink data for the first terminal. 8. The method of claim 7, further comprising: receiving by the first terminal, via the second transmission packet, the third indicative information transmitted by the network device, the third indicative information being used for scheduling uplink data transmission by the first terminal. 9. Communication terminal for unlicensed spectrum, containing: a communication module configured to transmit the first indicative information to the network device via a first transmission packet during a channel busy time (COT) received by the terminal, wherein the first transmission packet contains a configured and grant-free physical uplink shared channel (CG-PUSCH), and the uplink control information (UCI) of the CG-PUSCH comprises first indicative information, the first indicative information being used to indicate that the terminal is using the second transmission burst during the COT with the network device; wherein: the second transmission packet contains channels transmitted by the network device to the terminal; wherein, when the first indicative information is 1-bit indicative information for indicating whether the first terminal shares the resource during the COT, the channels transmitted by the second transmission burst are transmitted by broadcast or multicast, and the duration of the second transmission burst less than or equal to the second predetermined duration; wherein, when the first indicative information is used to indicate the start position of the second transmission burst and the length of the second transmission burst, the channels transmitted by the second transmission burst comprise a Unicast Physical Downlink Shared Channel (PDSCH). 10. The terminal according to claim 9, wherein when the channels transmitted by the second transmission packet are transmitted by broadcast or multicast mode, then the second transmission packet is used to transmit at least one of the following types of information: management information within the initial access procedure; management information within the random access procedure; management information used for mobility management; paging messages; reference signal; a PDCCH for a specific UE; handover commands; common channel PDCCH; paging message (short message service); clock block (SSB); and indicative information coming in the order of feedback on the downlink. 11. The terminal according to claim 10, in which: the second transmission packet is a transmission packet transmitted by the network device to another terminal, and the terminal and the other terminal have the same quasi-collocation (QCL) assumption. 12. The terminal of claim 11, wherein the COT further comprises a third transmission packet, the third transmission packet comprising channels transmitted by the terminal or another terminal to the network device. 13. The terminal according to claim 9, in which: if the 1-bit indication information displays 1, then the first terminal shares the resource during the COT, and if the 1-bit indication information displays 0, then the first terminal does not share the resource during the COT. 14. The terminal of claim 9, wherein when the channels transmitted by the second transmission burst comprise a PDCCH, the COT further comprises a third transmission packet, wherein the third transmission packet is used to transmit at least one of the following types of information: HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment), random access preamble, scheduling request, sounding reference, and channel state information. 15. The terminal of claim 14, wherein the information transmitted by the first transmission packet further comprises second indicative information, and the second indicative information is used to request the network device to schedule uplink data for the terminal. 16. The terminal according to claim 15, in which: the communication module is further configured to receive, via the second transmission packet, third indicative information transmitted by the network device, the third indicative information being used for scheduling data transmission by the terminal on the uplink.

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