CN113453317A

CN113453317A - Sidelink communication method and device

Info

Publication number: CN113453317A
Application number: CN202010218457.5A
Authority: CN
Inventors: 黄海宁; 黎超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2021-09-28
Anticipated expiration: 2040-03-25
Also published as: CN113453317B; WO2021190392A1

Abstract

A method and a device for sidelink communication are used for improving the communication quality of the sidelink. The method is applied to the terminal and comprises the following steps: the terminal obtains configuration information, where the configuration information is used to configure DRX parameters used by the terminal during sidelink communication, for example, the configuration information is used to indicate a first parameter used by the terminal for DRX, and the configuration information is granular with resource pools, that is, one resource pool corresponds to one set of DRX parameters, for example, the configuration information corresponds to the first resource pool. And the terminal carries out the sidelink communication according to the configuration information.

Description

Sidelink communication method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a sidelink communication method and device.

Background

Sidelink (SL) is a terminal-to-terminal communication. In the sidelink, a transmitting end transmits information to a receiving end through a physical layer sidelink control channel (PSCCH), the PSCCH is used for carrying Sidelink Control Information (SCI), the SCI includes parameters required for demodulating and decoding a physical layer sidelink shared channel (PSCCH), and the PSCCH is used for carrying data. The receiving end obtains the parameters required by the PSSCH for demodulation and decoding through the PSCCH sent by the blind detection sending end, and then receives the PSSCH.

In the prior art, a terminal needs to monitor or blindly detect PSCCHs transmitted by other terminals all the time, which brings great power consumption to the terminal.

Disclosure of Invention

The embodiment of the application provides a sidelink communication method and a sidelink communication device, which are used for reducing the power consumption of a terminal for receiving sidelink messages and improving the communication quality of the sidelink.

In a first aspect, a sidelink communication method is provided, which may be performed by a terminal, denoted as a first terminal, or may be performed by an apparatus in the first terminal. The method can be realized by the following steps: a first terminal obtains first configuration information, where the first configuration information is used to configure a Discontinuous Reception (DRX) parameter used by the first terminal during sidelink communication, for example, the first configuration information is used to indicate a first parameter used by the first terminal for DRX, where the first configuration information uses a resource pool as a granularity, and the first configuration information corresponds to the first resource pool; and the first terminal carries out side-link communication according to the first configuration information. For example, the first terminal performs the sidelink communication discontinuously according to the DRX parameter indicated by the first configuration information.

In the embodiment of the application, because the first configuration information is based on resource pools as a granularity, configured DRX parameters of the terminal working on one resource pool are the same, that is, the receiving time and the non-receiving time in one cycle are aligned, the terminal working in one resource pool can perform sidelink communication within the same receiving time, and the problem that communication cannot be performed due to the fact that the receiving times of two terminals do not intersect is avoided, so that the quality of sidelink communication is improved, the application of the DRX technology of the sidelink communication is realized, and the power consumption of the terminal is reduced. In addition, the DRX parameters are configured through the network equipment, the DRX parameters do not need to be configured between the terminals, and signaling waste caused by the DRX parameter configuration between the terminals is saved.

In one possible design, the DRX parameters may be various, for example, the DRX parameters may include a DRX cycle, or cycle for short. Said first parameters comprise first periods, one of said first periods comprising a first receive time and a first non-receive time; the first terminal receives a sidelink message at the first receiving time; and the first terminal stops receiving the side link message at the first non-receiving time. Therefore, the first terminal can receive the side link message discontinuously, and the side link message is stopped in the first non-receiving time, so that the control signaling sent by other terminals does not need to be monitored, and the power consumption of the terminal can be effectively reduced.

Optionally, at the first receiving time, the first terminal may also send a sidelink message. A first receive time within one period may be used for receiving and transmitting sidelink messages. The first terminal randomly selects resources to transmit a sidelink message at the first non-reception time. Since the first terminal cannot monitor the PSCCH of other terminals and cannot select resources in a sensing (transmitting) manner during the first non-reception time, but the resource is randomly selected without monitoring the PSCCH of other terminals, the first terminal may randomly select resources during the first non-reception time and transmit the sidelink message on the randomly selected resources.

In one possible design, the first configuration information may further indicate at least one second parameter used for DRX by the first terminal. After the first terminal receives the first configuration information, it is determined that the first configuration information includes a first parameter and at least one second parameter, and which parameter is to be used by the first terminal for performing the sidelink communication.

An alternative solution is: the first terminal acquires first indication information; the first indication information is used for indicating the first terminal to carry out sidelink communication according to the first parameter or the second parameter.

Another optional scheme is that the first terminal sends second indication information to the second terminal; the second indication information is used for indicating the first terminal to carry out sidelink communication according to the first parameter or the second parameter. Thus, the first terminal can select appropriate parameters according to the service type, service characteristics and power saving requirements of the first terminal.

In one possible design, the first resource pool corresponds to a first parameter having a plurality of values, for example, the plurality of values of the first parameter includes a first value and at least one second value. The terminal selects which value to use for sidelink communication, and this embodiment of the present application proposes some optional schemes.

In an optional scheme, the first terminal obtains third indication information, where the third indication information is used to indicate the first terminal to perform the sidelink communication according to the first value or the second value.

In another optional scheme, the first terminal sends fourth indication information to the second terminal, where the fourth indication information is used to indicate the first terminal to perform the sidelink communication according to the first value or the second value. In this way, the first terminal may select an appropriate parameter value according to its service type or service characteristic.

Another optional scheme is that the first terminal sends fifth indication information to the second terminal, where the fifth indication information is used to indicate the second terminal to perform sidelink communication according to the first parameter or the second parameter. In this way, the first terminal may select an appropriate parameter according to its service type or service characteristic.

Another optional scheme is that the first terminal sends sixth indication information to the second terminal, where the sixth indication information is used to indicate the second terminal to perform the sidelink communication according to the first value or the second value. In this way, the first terminal may select an appropriate parameter value according to its service type or service characteristic.

In a possible design, the first terminal may further obtain second configuration information, which is similar to the first configuration information and is also granular in terms of resource pools, so that the first terminal receives two sets of configuration information, each set corresponding to one resource pool. The second configuration information is used for indicating a third parameter used for DRX by the first terminal, and the second configuration information corresponds to a second resource pool. The first terminal may engage in sidelink communications in conjunction with the first parameter and the third parameter.

For example, the third parameter includes a second period, one of the second periods including a second reception time and a second non-reception time; the first terminal carries out side link communication according to the first configuration information and the second configuration information; wherein, the first terminal receives the sidelink message within a common time of the first receiving time and the second receiving time, and this manner may be denoted as manner 0.

How the first terminal performs the sidelink transmission when receiving the two sets of configuration information may have the following several possible implementations.

In mode 1, the first terminal receives the sidelink message in the first resource pool and stops receiving the sidelink message in the second resource pool within a common time of the first receiving time and the second non-receiving time.

Mode 2, the first terminal stops receiving and/or sending the sidelink message within a common time of the first receiving time and the second non-receiving time.

Mode 3, the first terminal receives and/or transmits the sidelink message in the common time of the first receiving time and the second non-receiving time.

In the mode 4, the first terminal receives instruction information from other terminals or network devices, and determines which mode is used for the sidelink communication according to the instruction information, wherein the content of the instruction can be any one or more of the modes 0 to 3.

In one possible design, the first terminal obtains fifth indication information, where the fifth indication information is used to indicate that the first terminal enables DRX, or the fifth indication information is used to indicate that the first terminal disables DRX. Enabling may also be referred to as activating and de-enabling may also be referred to as deactivating. In this way, it can be aligned when the first terminal uses DRX, and when DRX is disabled, the first terminal can monitor the PSCCH in the existing manner.

In one possible design, the first configuration information includes any one of: radio resource control, RRC, media access control, MAC, signaling, media access layer control, MAC CE, system information block, SIB, or master information block, MIB.

The first indication information, the second indication information, the third indication information, the fourth indication information or the fifth indication information may be the sideline control information SCI. SCI is sent by the terminal to the terminal and may be carried in PSCCH. The above-mentioned indication information may occupy reserved bits or bits in the SCI.

In a second aspect, a communication device is provided, which may be a terminal, referred to as a first terminal, or a device (e.g., a chip, or a system of chips, or a circuit) in the first terminal, or a device capable of being used with the first terminal. In one design, the communication device may include a module corresponding to one or more of the methods/operations/steps/actions described in the first aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the communication device may include a processing module and a communication module. The processing module is used for calling the communication module to execute the receiving and/or sending functions. Exemplarily, the following steps are carried out:

a processing module, configured to obtain first configuration information, where the first configuration information is used to configure a Discontinuous Reception (DRX) parameter used by a first terminal during sidelink communication, for example, the first configuration information is used to indicate a first parameter used by the first terminal for DRX, and the first configuration information uses a resource pool as a granularity, and corresponds to the first resource pool; the communication module is used for performing sidelink communication according to the first configuration information. For example, the communication module is configured to perform the sidelink communication discontinuously according to the DRX parameter indicated by the first configuration information.

In the embodiment of the application, because the first configuration information is based on resource pools as a granularity, configured DRX parameters of the terminal working on one resource pool are the same, that is, the receiving time and the non-receiving time in one cycle are aligned, the terminal working in one resource pool can perform sidelink communication within the same receiving time, and the problem that communication cannot be performed due to the fact that the receiving times of two terminals do not intersect is avoided, so that the quality of sidelink communication is improved, the application of the DRX technology of the sidelink communication is realized, and the power consumption of the terminal is reduced. In addition, the DRX parameters are configured through the network equipment, the DRX parameters do not need to be configured between the terminals, and the signaling waste caused by the configuration of the DRX parameters between the terminals is saved.

In one possible design, the DRX parameters may be various, for example, the DRX parameters may include a DRX cycle, or cycle for short. Said first parameters comprise first periods, one of said first periods comprising a first receive time and a first non-receive time; the first terminal receives a sidelink message at the first receiving time; and the first terminal stops receiving the side link message at the first non-receiving time. Therefore, the first terminal can receive the side link message discontinuously, and the side link message is stopped in the first non-receiving time, so that the control signaling and data sent by other terminals do not need to be monitored, and the power consumption of the terminal can be effectively reduced.

Optionally, the communication module is further configured to send the sidelink message at the first receiving time. A first receive time within one period may be used to start receiving and transmitting sidelink messages. The communication module is further configured to randomly select a resource to transmit a sidelink message at the first non-reception time. Since the first terminal cannot monitor the PSCCH of other terminals and cannot select resources in a sensing (transmitting) manner during the first non-reception time, but the resource is randomly selected without monitoring the PSCCH of other terminals, the first terminal may randomly select resources during the first non-reception time and transmit the sidelink message on the randomly selected resources.

In one possible design, the first configuration information may further indicate at least one second parameter used for DRX by the first terminal. After the communication module receives the first configuration information, the processing module determines that the first configuration information includes a first parameter and at least one second parameter, and which parameter is to be used for performing sidelink communication.

An alternative solution is: the communication module is further used for acquiring first indication information; the first indication information is used for indicating the first terminal to carry out sidelink communication according to the first parameter or the second parameter.

Another optional scheme is that the communication module is further configured to send second indication information to the second terminal; the second indication information is used for indicating the first terminal to carry out sidelink communication according to the first parameter or the second parameter. In this way, the first terminal may select an appropriate parameter according to its service type or service characteristic.

In one possible design, the first resource pool corresponds to a first parameter having a plurality of values, for example, the plurality of values of the first parameter includes a first value and at least one second value. The processing module selects which value to perform the sidelink communication according to the communication module, and the embodiment of the application provides some optional schemes.

In an optional scheme, the communication module is configured to obtain third indication information, where the third indication information is used to indicate the first terminal to perform the sidelink communication according to the first value or the second value.

In another optional scheme, the communication module is configured to send fourth indication information to the second terminal, where the fourth indication information is used to indicate the first terminal to perform the sidelink communication according to the first value or the second value. In this way, the first terminal may select an appropriate parameter value according to its service type or service characteristic.

In a possible design, the communication module is further configured to obtain second configuration information, where the second configuration information is similar to the first configuration information and is also in granularity of a resource pool, so that the first terminal receives two sets of configuration information, and each set corresponds to one resource pool. The second configuration information is used for indicating a third parameter used for DRX by the first terminal, and the second configuration information corresponds to a second resource pool. The first terminal may engage in sidelink communications in conjunction with the first parameter and the second parameter.

For example, the third parameter includes a second period, one of the second periods including a second reception time and a second non-reception time; the communication module is used for performing sidelink communication according to the first configuration information and the second configuration information; the communication module is configured to receive a sidelink message within a common time of the first receiving time and the second receiving time, which may be denoted as a mode 0.

How to perform sidelink transmission when the parameters are different when the communication module receives the two sets of configuration information may be implemented in the following manners.

In mode 1, the communication module is configured to receive the sidelink message in the first resource pool and stop receiving the sidelink message in the second resource pool within a common time of the first receiving time and the second non-receiving time.

Mode 2, the communication module is configured to stop receiving and/or stopping sending the sidelink message within a common time of the first receiving time and the second non-receiving time.

Mode 3, the communication module is configured to receive and/or transmit a sidelink message within a common time of the first reception time and the second non-reception time.

Mode 4, the communication module is configured to receive indication information from another terminal or a network device, and the processing module is configured to determine which mode to use for the sidelink communication according to the indication information, where the indication mode may be any one or more of modes 0 to 3.

In one possible design, the communication module is configured to acquire fifth indication information, where the fifth indication information is used to indicate that the first terminal enables DRX, or the fifth indication information is used to indicate that the first terminal disables DRX. Enabling may also be referred to as activating and de-enabling may also be referred to as deactivating. In this way, it can be aligned when the first terminal uses DRX, and when DRX is disabled, the first terminal can monitor the PSCCH in the existing manner.

The first indication information, the second indication information, the third indication information, the fourth indication information or the fifth indication information may be the sideline control information SCI. SCI is sent by the terminal to the terminal and may be carried in PSCCH. The above indication information may occupy reserved bits in the SCI.

In a third aspect, a communication apparatus is provided, which includes a communication interface and a processor, wherein the communication interface is used for the communication apparatus to communicate with other devices, such as data or signal transceiving. The communication interface may illustratively be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be a network device or other terminal. The processor is arranged to invoke a set of programs, instructions or data to perform the method described in the first aspect above. The communication device may also include a memory for storing programs, instructions or data called by the processor. The memory is coupled to the processor, and the processor, when executing instructions or data stored in the memory, may implement the method described in the first aspect above.

In a fourth aspect, a method of sidelink communication is provided, the method being executable by a network device, the method comprising: generating first configuration information, and sending the first configuration information to a first terminal, wherein the first configuration information is used for indicating a first parameter of the first terminal for Discontinuous Reception (DRX), and the first configuration information takes a resource pool as granularity. The interpretation, function or presentation of the first configuration information may refer to the first aspect and will not be described in too much detail herein.

In one possible design, the first configuration information may further indicate at least one second parameter for DRX for the first terminal; the first parameter and the second parameter are the same type of parameter, for example, the first parameter and the second parameter are both periods, then the first parameter may be a first period, the second parameter may be a second period, and the first period and the second period are different.

Of course, the first parameter and the second parameter may be other types of parameters.

When the first configuration information indicates the first parameter and the at least one second parameter, the network device may further instruct the terminal which parameter to use for the sidelink communication. For example, the network device instructs the terminal to use the first parameter for measurement link communications or instructs the terminal to use the second parameter for measurement link communications.

In one possible design, the first parameter includes a first value and at least one second value. For example, the first parameter is a period, the first value may be a first period, the second value may be a second period, and the first period and the second period are different. Of course, the first parameter may be other types of parameters.

When the first parameter includes the first value and the at least one second value, the network device may further instruct the terminal which value to use for the sidelink communication. For example, the network device instructs the terminal to use the first value for measurement link communications or instructs the terminal to use the second value for measurement link communications.

In one possible design, the network device sends indication information to the first terminal, where the indication information is used to indicate the first terminal to activate DRX, or the indication information is used to indicate the first terminal to deactivate DRX. When the activation of the DRX is not indicated to the terminal, the terminal may adopt a conventional reception manner, which may achieve a compatible effect with the conventional manner. Optionally, the network device may also instruct the first terminal to activate DRX or deactivate DRX through the first configuration information.

Optionally, the network device may further configure two sets of configuration information for the first terminal, for example, send the first configuration information and at least one second configuration information to the first terminal. In this case, the network device may also transmit indication information to the terminal indicating what manner the terminal uses for the sidelink communication. The aspect may be any one or more of aspects 0 to 3 described in the first aspect.

The beneficial effects of the method provided by the fourth aspect may refer to the effect description corresponding to the corresponding features of the first aspect, and are not described herein again.

In a fifth aspect, a communication apparatus is provided, which may be a network device, or an apparatus (e.g., a chip or a system of chips or a circuit) in a network device, or an apparatus capable of being used with a network device. In one design, the communication device may include a module corresponding to one or more of the methods/operations/steps/actions described in the second aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the communication device may include a processing module and a communication module. The processing module is used for calling the communication module to execute the receiving and/or sending functions. Exemplarily, the following steps are carried out:

the device comprises a processing module used for generating first configuration information, a communication module used for sending the first configuration information to a first terminal, wherein the first configuration information is used for indicating a first parameter of the first terminal used for receiving DRX in a discontinuous mode, and the first configuration information takes a resource pool as granularity. The interpretation, function or presentation of the first configuration information may refer to the first aspect and will not be described in too much detail herein.

The processing module is further configured to instruct, via the communication module, which parameter the terminal uses for the sidelink communication when the first configuration information indicates the first parameter and the at least one second parameter. For example, the terminal is instructed to use the first parameter for measurement link communication, or the terminal is instructed to use the second parameter for measurement link communication.

When the first parameter includes a first value and at least one second value, the processing module is further configured to instruct, by the communication module, which value the terminal uses for the sidelink communication. For example, the terminal is instructed to use the first value for measurement link communications, or the terminal is instructed to use the second value for measurement link communications.

In one possible design, the communication module is further configured to send indication information to the first terminal, where the indication information is used to indicate the first terminal to activate DRX, or the fifth indication information is used to indicate the first terminal to deactivate DRX. When the activation of the DRX is not indicated to the terminal, the terminal may adopt a conventional reception manner, which may achieve a compatible effect with the conventional manner.

Optionally, the processing module is further configured to configure two sets of configuration information for the first terminal, for example, the processing module sends the first configuration information and at least one second configuration information to the first terminal through the communication module. In this case, the communication module is further configured to send indication information to the terminal, the indication information indicating what manner the terminal uses for the sidelink communication. The aspect may be any one or more of aspects 0 to 3 described in the first aspect.

The beneficial effects of the method provided by the fifth aspect may refer to the effect description corresponding to the corresponding features of the fourth aspect, and are not described herein again.

In a sixth aspect, a communication apparatus is provided, which includes a communication interface and a processor, wherein the communication interface is used for the communication apparatus to communicate with other devices, such as data or signal transceiving. The communication interface may illustratively be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be a terminal. The processor is configured to call a set of programs, instructions or data to perform the method described in the fourth aspect. The communication device may also include a memory for storing programs, instructions or data called by the processor. The memory is coupled to the processor, and the processor, when executing the instructions or data stored in the memory, may implement the method described in the fourth aspect above.

In a seventh aspect, this embodiment also provides a computer-readable storage medium, which stores computer-readable instructions that, when executed on a computer, cause the method as described in the first aspect, the fourth aspect, any one of the possible designs of the first aspect, or any one of the possible designs of the fourth aspect to be performed.

In an eighth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method described in the first aspect, the fourth aspect, any possible design of the first aspect, or any possible design of the fourth aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a ninth aspect, an embodiment of the present application provides a communication system, including a first terminal and a network device, where the first terminal is configured to perform the method as set forth in the first aspect or any one of the possible designs of the first aspect; and/or the network device is adapted to perform the method as described in the fourth aspect or any one of the possible designs of the fourth aspect.

A tenth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method as set forth in the first aspect and any one of the possible designs of the first aspect; and/or the network device is adapted to perform the method as described in the fourth aspect or any one of the possible designs of the fourth aspect.

Drawings

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

fig. 2 is a schematic diagram of D2D communication resource allocation in an embodiment of the present application;

FIG. 3 is a diagram illustrating a pattern of sidelink resource allocation in an embodiment of the present application;

FIG. 4 is a diagram illustrating a periodic receive side uplink message in an embodiment of the present application;

FIG. 5 is a flow chart illustrating a sidelink communications method according to an embodiment of the present application;

fig. 6 is a schematic diagram illustrating a method for multiple terminal-side uplink communications in an embodiment of the present application;

FIG. 7 is a diagram illustrating a method for downlink communication under different cycle configurations according to an embodiment of the present application;

FIG. 8 is a diagram illustrating a method for downlink communication under multiple sets of configuration information according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device in an embodiment of the present application;

fig. 10 is a second schematic structural diagram of a communication device in the embodiment of the present application.

Detailed Description

The embodiment of the application provides a sidelink communication method and a sidelink communication device, which are used for improving the communication quality of a sidelink. The method and the device are based on the same or similar technical conception, and because the principle of solving the problems of the method and the device is similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated. In the description of the embodiment of the present application, "and/or" describes an association relationship of associated objects, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. At least one referred to in this application means one or more; plural means two or more. In addition, it is to be understood that the terms first, second, third and the like in the description of the present application are used for distinguishing between the descriptions and are not to be construed as indicating or implying relative importance or order. Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

The sidelink communication method provided in the embodiment of the present application may be applied to a fourth generation (4G) communication system, such as Long Term Evolution (LTE), or may be applied to a fifth generation (5G) communication system, such as a 5G New Radio (NR). It can also be applied to various future communication systems, such as a 6th generation (6G) communication system.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 1 illustrates an architecture of a possible communication system to which the sidelink communication method provided in the embodiment of the present application is applicable, where the communication system may include a network device 101 and one or more terminals 102. It should be understood that more or fewer network devices or terminals may be included in the communication system. The network device or the terminal may be hardware, or may be software divided in function, or may be a combination of hardware and software. In addition, a plurality of terminals 102 may constitute one communication system. The network device and the terminal can communicate with each other through other devices or network elements. The network device 101 may transmit downlink data to the terminal 102, or may receive uplink data transmitted by the terminal 102. Of course, the terminal 102 may also transmit uplink data to the network device 101, or may receive downlink data transmitted by the network device 101. The terminal 102 and the terminal 102 can communicate with each other, and a link for communication between the terminal 102 and the terminal 102 is called a sidelink.

The network device 101 is a node in a Radio Access Network (RAN), which may also be referred to as a base station and may also be referred to as a RAN node (or device). Currently, some examples of network devices 101 are: next generation base station (gNB), next generation evolved Node B (Ng-eNB), Transmission Reception Point (TRP), evolved Node B (evolved Node B, eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), home base station (e.g., home evolved Node B, or home Node B, HNB), Base Band Unit (BBU), or wireless fidelity (Wifi) access point (access point, AP), network device 101 may also be a satellite or future base station, and may also be referred to as a satellite platform, an aircraft, an overhead ground or base station. The network device 101 may also be a network device in a future possible communication system. In the embodiment of the present application, the above-mentioned devices may be described by using a network device or a base station.

The terminal 102, which may also be referred to as User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), a terminal device, and the like, is a device that provides voice or data connectivity to a user, and may also be an internet of things device. For example, the terminal 102 includes a handheld device, a vehicle-mounted device, or the like having a wireless connection function. The terminal 102 may be: mobile phone (mobile phone), tablet computer, notebook computer, palm computer, Mobile Internet Device (MID), wearable device (e.g. smart watch, smart bracelet, pedometer, etc.), vehicle-mounted device (e.g. car, bicycle, electric car, airplane, ship, train, high-speed rail, etc.), Virtual Reality (VR) device, Augmented Reality (AR) device, wireless terminal in industrial control (industrial control), smart home device (e.g. refrigerator, television, air conditioner, electric meter, etc.), smart robot, workshop device, wireless terminal in self drive (driving), wireless terminal in remote surgery (remote medical supply), wireless terminal in smart grid (smart grid), wireless terminal in transportation safety (transportation safety), wireless terminal in smart city (city), or a wireless terminal in a smart home (smart home), a flying device (e.g., a smart robot, a hot air balloon, a drone, an airplane), etc.

The sidelink communication in the embodiments of the present application may be, for example, a Device-to-Device (D2D) communication. The terminal and the terminal directly communicate with each other, so that the communication flow can be simplified, and the communication time delay can be reduced. For example, the sidelink communication may also be vehicle to vehicle (V2X) communication with other devices, such as vehicle to vehicle (V2V), vehicle to vehicle (V2I), vehicle to pedestrian (V2P).

A terminal performing sidelink communication needs to first acquire a sidelink communication resource. Some possible sidelink resource allocation schemes are described below.

The resources used for sidelink communications are typically configured or pre-configured resources. For example, in the LTE system, a part of the uplink communication resources is divided for D2D communication. In NR, the resource used for sidelink communication may also be a sidelink dedicated resource, for example, a sidelink dedicated carrier is divided for sidelink communication, and a terminal for V2X communication may use the sidelink dedicated carrier for communication.

This portion of resources used for sidelink communications may be generally referred to as a resource pool. The resource pool contains time-frequency resources that may be used for sidelink transmissions. For example, taking D2D communication in the LTE system as an example, the resource pool includes uplink subframes and uplink frequency bands that can be used for D2D communication. As shown in fig. 2, a schematic diagram of D2D communication resource allocation is given, and the D2D resource pool includes periodically occurring uplink subframes (e.g., shaded portions) and frequency bands for D2D communication in the uplink bandwidth. Furthermore, for different D2D traffic, the base station may allocate dedicated D2D resources for it, e.g., a D2D communication resource pool for D2D communication traffic, a D2D discovery resource pool for D2D discovery traffic, and a D2D synchronization resource pool for D2D synchronization.

Generally, the patterns of sidelink resource allocation may include two, a pattern one and a pattern two, as described below.

The first mode is as follows: the terminal performs sidelink communication and requires the network equipment to perform resource allocation. For example, as shown in fig. 3, before performing the sidelink communication, the terminal needs to transmit a sidelink communication scheduling request to the network device, after receiving the sidelink communication scheduling request, the network device transmits downlink control signaling (DCI) to indicate a Physical Uplink Shared Channel (PUSCH) resource, the terminal transmits a sidelink buffer report to the network device, the network device allocates the sidelink communication resource to the terminal, and transmits the DCI to indicate the allocated sidelink communication resource to the terminal, and the terminal performs the sidelink communication according to the sidelink communication resource indicated by the DCI.

And a second mode: the terminal does not need the network equipment to distribute resources for the sidelink communication, but autonomously selects the sidelink resources in a resource pool pre-configured by the network equipment. For example, the terminal may acquire the sidelink resource through a sensing (sensing) procedure. The terminal transmits Sidelink Control Information (SCI). The terminal obtains the information occupied by the resources of other terminals by decoding SCIs of other terminals or performing sidelink measurement, and the terminal can select the resources not occupied by other terminals according to the sending result. The SL measurement is based on a received power (SL-RSRP) of the sidelink reference signal obtained when the SCI is decoded.

Based on the above two modes of LTE sidelink resource allocation, in this embodiment of the application, the terminal may optionally adopt two modes for sidelink communication when performing sidelink communication. In one mode, the terminal carries out sidelink communication in a resource pool configured or pre-configured by the network equipment according to the sidelink resources distributed by the network equipment; in another mode, the terminal autonomously selects a sidelink resource for sidelink communication in a resource pool configured by the network equipment or a pre-configured resource pool, and performs the sidelink communication. The resource pool in the embodiment of the present application may include one or more time-frequency resources, or may be considered as a set of time-frequency resources.

Of course, the embodiments of the present application are not limited to the above two methods for acquiring sidelink resources. After the sidelink resources are acquired, when the terminal performs sidelink communication, the terminal needs to monitor the PSCCH of other terminals, and the PSCCH transmitted by other terminals can be demodulated and decoded according to SCIs in the PSCCH of other terminals to acquire data in the PSCCH transmitted by other terminals, thereby completing the sidelink communication. The terminal needs to blind-detect the PSCCH sent by other terminals, and if the terminal always blind-detects or monitors the PSCCH, great power consumption is brought to the terminal.

The high power consumption of the terminal is a pain point problem. In order to reduce the high energy consumption caused by the terminal continuously monitoring the PSCCH, in the embodiment of the present application, a Discontinuous Reception (DRX) technique is introduced in the sidelink communication.

DRX means that the terminal does not necessarily continuously receive the sidelink message, but discontinuously receives the sidelink message according to a certain rule. For example, as shown in fig. 4, the terminal may periodically receive the sidelink message, including a reception time (ON) and a non-reception time (OFF) in one period, receive the sidelink message in the reception time of one period, and stop receiving the sidelink message in the non-reception time of one period. In this way, the terminal may not have to continuously receive sidelink messages, thereby enabling power savings. Wherein the terminal receiving side uplink message comprises the PSCCH and/or the PSSCH.

If the terminal uses the DRX technology for sidelink communication, some parameters of DRX need to be acquired. The transmitting-side terminal may transmit the DRX parameters to the receiving-side terminal. Different sending side terminals may all send DRX parameters to the same receiving side terminal, and the DRX parameters of the two sending side terminals may be different. This may result in that there may be no intersection of the reception times (ON) of the two terminals of the sidelink communication, and thus the sidelink communication may not be possible. The embodiment of the application provides a sidelink communication method which can solve the problem.

The sidelink communication method provided in the embodiment of the present application is described in detail below, and as shown in fig. 5, the specific steps are as follows.

S501, the first terminal acquires first configuration information.

The first configuration information is used to indicate a first parameter used by the first terminal for DRX.

In one case, the first configuration information is configured by the network device. In another case, if the first terminal is located outside the coverage of the network device, the first configuration information of the first terminal may also be preconfigured, and in this case, the first terminal may also update according to the received first configuration information of the network device when entering the coverage of the network device.

Fig. 5 is an example of the first configuration information being configured by the network device, in this case, the method may further include S500: the network device generates first configuration information. The network equipment sends the generated first configuration information to the first terminal, and the first terminal receives the first configuration information from the network equipment.

The first parameter may be referred to as a first DRX parameter, which is some parameters related to DRX when the first terminal employs the DRX technique. The first parameter may be one or more. For example, the first parameter may include a sidelink DRX cycle (SL DRX cycle) including a length of a reception time within one sidelink DRX cycle, and may further include a length of a non-reception time within one cycle. For convenience of description, the sidestream DRX cycle may also be referred to as a DRX cycle (DRX cycle), or a cycle. The first parameter may further include an SLDRX duration timer (DRX-onDurationTimer), an SL DRX deactivation timer, an SL DRX hybrid automatic repeat request (HARQ) Round Trip Time (RTT) timer, or an SL DRX retransmission timer, an SL DRX cycle start offset. The configuration of the timer includes the length of the timer, and the like, and is not limited herein. Wherein the SL DRX duration timer is a period of time starting in one DRX cycle and is used for indicating whether the terminal is in an active time or not. And in the activation time, the terminal carries out PSCCH monitoring and carries out data receiving and/or sending. The terminal is in the active time after the timer is started. The value of the timer can be a positive integer such as 1ms or 1000 ms. The SL DRX deactivation timer is used to indicate whether the terminal is in an active time, and is turned on when the terminal monitors a PSCCH. The terminal is in the activation time, and monitors the PSCCH and receives and/or transmits data. The value of the timer can be a non-negative integer such as 0ms, 1ms or 100 ms. The SL DRX hybrid automatic repeat request round trip time timer is a maximum duration until one SL retransmission is received, indicating whether the terminal is in active time. When the timer is active, the terminal is not in the active time, i.e. the terminal does not listen to the PSCCH. The value of the timer may be a non-negative integer number of Orthogonal Frequency Division Multiplexing (OFDM) symbols or time slots. Typically, a SL DRX harq round trip time timer is started after it expires. Optionally, the terminal starts an SL DRX hybrid automatic repeat request round trip time timer of a corresponding HARQ process at a first symbol after the end symbol of the psch is sent. When the SL HARQ feedback is disabled, i.e. the configuration cycle of the PSFCH feedback resource is 0, a SL DRX HARQ round trip time timer is started after the SL DRX HARQ round trip time timer expires. When SL HARQ feedback is enabled, that is, the configuration cycle of the PSFCH feedback resource is 1, 2, or 4, assuming that HARQ feedback enabling is indicated in the SCI scheduling the PSSCH, the terminal stops the SL DRX retransmission timer of the corresponding process after sending ACK in the PSFCH. Assuming HARQ feedback de-enabling is indicated in the SCI scheduling the PSSCH, a SL DRX HARQ round trip time timer is started after the SL DRX HARQ round trip time timer expires.

The SL DRX retransmission timer is used for indicating whether the terminal is in the active time or not, the timer is started, and the terminal is in the active time. The value of the timer can be 10s or 180s, etc. The SL DRX cycle start offset is used to define the time slot in which the terminal starts within one DRX cycle, typically 1/32ms or an integer multiple of 1 ms.

Alternatively, the value of the SL DRX retransmission timer may be determined per priority per Channel Busy Ratio (CBR). For example, the length of the SL DRX retransmission timer corresponding to the data with high priority is longer. Optionally, different priority intervals correspond to intervals of different SL DRX retransmission timer lengths. For example, when the CBR value is large, the length of the corresponding SL DRX retransmission timer is shorter, and different CBR value intervals may correspond to different SL DRX retransmission timer length intervals. Therefore, the congestion condition of the channel can be better relieved by increasing the power saving time of the terminal.

Alternatively, the value of the SL DRX deactivation timer may be determined per priority per channel CBR. For example, the length of the SL DRX deactivation timer corresponding to the data with high priority is longer. Optionally, the different priority intervals correspond to different intervals of SL DRX deactivation timer length. For example, when the CBR value is large, the length of the corresponding SL DRX deactivation timer is shorter, and different CBR value intervals may correspond to different SL DRX deactivation timer length intervals. Therefore, the congestion condition of the channel can be better relieved by increasing the power saving time of the terminal.

In one case, the first parameter may include a plurality of DRX cycles, such as a long DRX cycle, a short DRX cycle, a sidestream DRX cycle, and the like.

The first configuration information is configuration information with a resource pool as granularity. That is, with the resource pool as the granularity, each resource pool is configured with one or more sets of DRX parameters, and a terminal indicated on the resource pool can receive the DRX parameters corresponding to the resource pool. For example, the first configuration information corresponds to the first resource pool, or the first configuration information is configuration information on the first resource pool, or the first configuration information has a corresponding relationship with the first resource pool, or the first configuration information is information of a resource pool level (per resource pool). It is understood that the terminals operating on the first resource pool are all configured with the first configuration information, or the first information is common information configured on one resource pool, and the terminals configured with the resource pool can receive the first information.

The network device may also send the first configuration information to other terminals operating in the first resource pool. That is, the first configuration information is information that the network device configures on the first resource pool. Each terminal configured to operate on the first resource pool may receive the first configuration information.

S502, the first terminal carries out side-link communication according to the first configuration information. Fig. 5 illustrates an example in which a first terminal performs sidelink communication with a second terminal.

The first terminal receives the sidelink message discontinuously according to the first configuration information. Optionally, the first parameter includes a period, which is recorded as a first period, and a value unit of the first period may be milliseconds (ms), for example, 1ms, 2ms, and the like. A first cycle includes a first receive time and a first non-receive time.

The first terminal may receive the sidelink message within a first reception time in one cycle and stop receiving the sidelink message within a first non-reception time in one cycle when performing the sidelink communication according to the first configuration information.

It can be seen that the first DRX parameter in the first configuration information may indicate that the first terminal receives the sidelink message intermittently or discontinuously. Optionally, the first DRX parameter in the first configuration information may also be used to instruct the first terminal to send a sidelink message. For example, the first terminal transmits the sidelink message within a first reception time within one period according to the first configuration information. For another example, the first terminal transmits the sidelink message using the randomly selected resource during a first non-reception time within one period according to the first configuration information. That is, the terminal randomly selects resources in a preconfigured or configured resource pool or resource set to obtain resources for sending the sidelink information. Since the first terminal cannot monitor the PSCCH of other terminals and cannot select resources in a sensing (transmitting) manner during the first non-reception time, but the resource is randomly selected without monitoring the PSCCH of other terminals, the first terminal may randomly select resources during the first non-reception time and transmit the sidelink message on the randomly selected resources.

In the embodiment of the application, because the first configuration information is based on resource pools as a granularity, configured DRX parameters of the terminal working on one resource pool are the same, that is, the receiving time and the non-receiving time in one cycle are aligned, the terminal working in one resource pool can perform sidelink communication within the same receiving time, and the problem that communication cannot be performed due to the fact that the receiving times of two terminals do not intersect is avoided, so that the quality of sidelink communication is improved, the application of the DRX technology of the sidelink communication is realized, and the power consumption of the terminal is reduced. In addition, the DRX parameters are configured through the network equipment, the DRX parameters do not need to be configured between the terminals, and signaling waste caused by frequent signaling interaction when the DRX parameters are configured between the terminals is saved.

In this embodiment of the application, the first configuration information may be configured by the network device to the first terminal, or may be preconfigured or well-defined by a protocol. The first terminal may obtain the first configuration information through a high-level signaling if the first terminal obtains the first configuration information from the network device. The high-level signaling carries first configuration information, or the first configuration information is configured by the high-level signaling. The higher layer signaling may be any one of a Radio Resource Control (RRC) message, a medium access layer signaling, a medium access control element (MAC CE), a System Information Block (SIB), or a Master Information Block (MIB).

In one case, when obtaining the information for configuring the resource pool, the first terminal may obtain first configuration information in the information for configuring the resource pool, where the information for configuring the resource pool includes the information of the first parameter, so that the first terminal may determine the resource pool corresponding to the first configuration information. For example, the first terminal obtains a higher layer signaling, where the higher layer signaling includes information for configuring a resource pool for the first terminal and also includes the first configuration information.

In another case, the first terminal obtains first configuration information of DRX, and the first configuration information carries an index or an identifier of the first resource pool, so that the first terminal can determine that the first configuration information corresponds to the first resource pool.

In another case, the first terminal obtains information for configuring the resource pool and first configuration information for DRX, respectively.

Optionally, the first configuration information may be configured information on each serving cell and/or carrier. For example, the first configuration information corresponds to a first serving cell, and the first configuration information corresponds to a first carrier. Or, the first configuration information is configuration information with serving cells as granularity, or the first configuration information is configuration information on each first serving cell, or the first configuration information has a corresponding relationship with the first serving cell, or the first configuration information is information of a serving cell level (per service cell). Similarly, the first configuration information may be carrier-granular configuration information, or the first configuration information is carrier level (per carrier) information, or the first configuration information has a corresponding relationship with the first carriers, or the first configuration information is configuration information on each first carrier.

Optionally, the first configuration information may also be a configuration of each partial Bandwidth (BWP), that is, the configuration of the first configuration information is granular using BWP, and each terminal configured to transmit and/or receive data on the BWP receives the first configuration information.

In practical applications, one resource pool may correspond to more than one DRX parameter, for example, the first configuration information may also be used to indicate at least one second parameter used by the first terminal for DRX. The second parameter is different from the first parameter. For example, the period included in the second parameter is different from the period included in the first parameter.

After the first terminal receives the first configuration information, it is determined that the first configuration information includes a first parameter and at least one second parameter, and which parameter is to be used by the first terminal for performing the sidelink communication.

Optionally, the first terminal obtains indication information, which is recorded as first indication information, where the first indication information is used to indicate which parameter is adopted by the first terminal to perform the sidelink communication, that is, indicate whether the first terminal adopts the first parameter or the second parameter to perform the sidelink communication. The first parameter and the at least one second parameter refer to two parameters of the same type. For example, the first parameter is a first DRX cycle, and the second parameter is a second DRX cycle. Wherein, the corresponding timer, cycle length and/or time slot offset of the DRX cycle are configured separately.

The first terminal can determine the parameter indicated by the first indication information according to the first indication information to conduct the sidelink communication.

Wherein, the first indication information may be from the network device or from other terminals. If the first indication information is from other terminals, the first indication information may be SCI, and the first indication information may be indicated by a field in the SCI or may be indicated by a reserved bit in the SCI. In another case, the first indication information may be the PC5 RRC, MAC, or MAC CE. The PC5 is an interface or a reference point between terminals, and the PC5 RRC refers to RRC configuration given to a terminal by a terminal.

The first terminal may also autonomously decide which parameter to use for the sidelink communication, i.e. the first terminal determines the DRX parameters to be used by itself. If the peer device of the sidelink communication is the second terminal, that is, the first terminal sends the data information to the second terminal, the first terminal may notify the autonomously determined parameter to the second terminal, so that the two terminals of the sidelink communication can align the DRX parameter. For example, the first terminal may transmit second indication information to the second terminal, the second indication information indicating which parameter the first terminal performs the sidelink communication according to. And the second terminal receives second indication information from the first terminal and determines the parameters selected by the first terminal according to the second indication information. The second terminal may perform a sidelink communication with the first terminal according to the parameter indicated by the second indication information. Optionally, the second terminal may also indicate a parameter used by itself to the first terminal according to its service characteristic, and negotiate with the first terminal to determine a parameter used for finally performing sidelink communication. The second indication information may be the SCI. The second indication information may be a field in the SCI or may be a reserved bit in the SCI. The second indication information may also be the PC5 RRC, MAC, or MAC CE.

The first terminal may use the first indication information or the autonomous decision parameter in a combined manner or may use the first indication information or the autonomous decision parameter independently.

In short, for the sending end and the receiving end, the sending end may indicate the DRX parameters used by the sending end to the receiving end, or the sending end may indicate the DRX parameters used by the receiving end to the receiving end. The parameters adopted by the sending end can be selected autonomously or determined according to the indication information. Thus, the appropriate parameter or parameter value can be selected according to the service type or service characteristic of the terminal and the power saving requirement of the terminal.

In one possible implementation, there may be multiple values for one DRX parameter configured at the granularity of a resource pool. Taking DRX parameters (i.e., first parameters) as cycles as an example, the first resource pool corresponds to the first configuration information, i.e., the first configuration information is information configured in the first resource pool. In one case, the first configuration information configures a plurality of first parameters, i.e., configures a plurality of cycles. In another case, the period parameter configured by the first configuration information has a plurality of values.

Similarly, if the first parameter corresponding to the first resource pool has multiple values, the terminal selects which value to perform the sidelink communication. It is assumed that the plurality of values of the first parameter comprises a first value and at least one second value.

Optionally, the first terminal obtains the indication information, which is recorded as third indication information, where the third indication information is used to indicate which value the first terminal adopts for performing the sidelink communication, that is, to indicate the first terminal to adopt the first value or the value in the at least one second value for performing the sidelink communication.

The first terminal may select a parameter value indicated by the third indication information for the sidelink communication according to the third indication information.

Wherein, the third indication information may be from the network device or from other terminals. If the third indication information is from other terminals, the third indication information may be SCI. This may be indicated by a field in the SCI or may be indicated by a reserved bit in the SCI. Wherein, using SCI to indicate provides flexibility for the terminal, the terminal sending the indication information may determine the third indication information for the terminal receiving the indication information according to the type of service to be sent. The third indication may also be the PC5 RRC, MAC, or MAC CE. For another example, the third indication information may be from a network device, may be downlink control information DCI, or may be any one of RRC, MAC CE, SIB, and MIB. Wherein the DCI is used to indicate that DRX configuration flexibility is guaranteed.

The first terminal may also autonomously decide which value to use for the sidelink communication. If the peer device of the sidelink communication is the second terminal, the first terminal may notify the second terminal of the autonomously determined value, so that the two terminals of the sidelink communication can align the value of the DRX parameter. For example, the first terminal may transmit fourth indication information to the second terminal, the fourth indication information being used to indicate which parameter value the first terminal performs the sidelink communication according to. Such that the second terminal can configure and communicate with the sidelink in accordance with the DRX parameter value used by the first terminal. The fourth indication information may be the SCI, and may be indicated by a field in the SCI or may be indicated by a reserved bit in the SCI. The fourth indication may also be the PC5 RRC, MAC, or MAC CE.

The first terminal may use the third indication information or the autonomous determination parameter value in a combined manner, or may use the third indication information or the autonomous determination parameter value independently.

In short, for the sending end and the receiving end, the sending end may indicate the parameter value adopted by itself to the receiving end, and the sending end may also indicate the parameter value that the receiving end should adopt to the receiving end. The parameter value adopted by the sending end can be selected autonomously or determined according to the indication information. Thus, the appropriate parameter or parameter value can be selected according to the service type or service characteristic of the user.

The following describes, by way of example, a case where the first configuration information includes a plurality of parameters or the first parameter includes a plurality of values.

The first parameter is used as a sidestream DRX cycle, and for convenience of description, the sidestream DRX cycle is briefly described as a cycle. The first configuration information includes a plurality of periods, for example, period 1, period 2, period 3, and period 4. Alternatively, the first parameter is a period, which includes a plurality of values, period 1, period 2, period 3, and period 4. According to the scheme, the first terminal acquires the first indication information, or the first terminal sends the second indication information to the second terminal, or the first terminal acquires the third indication information, or the first terminal sends the fourth indication information to the second terminal. In any case, the instruction information is for instructing any one of the cycle 1 to the cycle 4.

Assuming that the indication information is SCI, a certain period may be indicated by a field in the SCI or a reserved bit in the SCI. For example, cycle 1 to cycle 4 require 2 bits to indicate that cycle 1 is identified by 01, cycle 2 is identified by 10, cycle 3 is identified by 11, and cycle 4 is identified by 00. If the reserved bits in the SCI for indicating the cycle are 2 bits, and the 2 bits are 01, the SCI is used for indicating cycle 1, indicating that the DRX cycle selected by the first terminal is cycle 1, or indicating that the DRX cycle that the second terminal needs to use is cycle 1. If the field indicating the DRX cycle or the reserved bit in the SCI is null, cycle 1 is the default cycle configuration parameter or the cycle configuration parameter value used.

Alternatively, a certain period may be implicitly associated through a priority field in the SCI. For example, it is assumed that the priorities are 1, 2, 3, 4, 5, 6, 7, and 8 from high to low, and the lengths of cycle 1 to cycle 4 are cycle 1, cycle 2, cycle 3, and cycle 4 from long to short. Priority 1-2 corresponds to cycle 1, priority 3-4 corresponds to cycle 2, priority 5-6 corresponds to cycle 3, and priority 7-8 corresponds to cycle 4. When the priority field in the SCI indicates priority 1, the corresponding cycle is cycle 1.

Optionally, the SCI may also be used to indicate activation or deactivation (enabling or disabling) of DRX. The terminal may indicate whether it activates DRX itself using the SCI or indicate whether the opposite terminal activates DRX. In one case, the first terminal indicates whether to activate DRX itself using the SCI. In another case, the first terminal indicates whether the second terminal activates DRX using the SCI.

In one possible implementation, the first configuration information includes a plurality of sidestream DRX cycles, e.g., cycle 1, cycle 2, cycle 3. The SCI is used to indicate cycle 1, cycle 2, cycle 3 and whether to activate or deactivate DRX. For example, as shown in Table 1, there are 2 bits in the SCI to indicate these 4 states.

TABLE 1

2 bits in SCI	Field or reserved bit meanings
		00	Period 1
01	Period 2
		10	Period 3
11	Activating or deactivating DRX configuration

If a terminal is in sidelink communication with different terminals, the terminal may receive multiple indication messages, which may indicate different parameters or indicate different parameter values. In this case, when the terminal is instructed with a plurality of parameters or a plurality of values, the terminal may perform the sidelink communication according to the configuration of the plurality of parameters or the plurality of values, respectively. That is, a union set of the results configured according to a plurality of parameters or a plurality of values is selected for sidelink communication.

As shown in fig. 6, a plurality of terminals are denoted by PUE, VUE1 and VUE2, and PUE performs unicast communication with VUE1 and VUE2, respectively. The PUE is configured with four DRX parameters from cycle 1 to cycle 4, the PUE usage cycle 1 is indicated by the VUE1 through bit 01 in SCI, and the PUE usage cycle 2 is indicated by the VUE2 through bit 10 in SCI. The PUE may select a union period of the receive times in cycle 1 and cycle 2 within which to conduct sidelink communications. The PUE may perform sidelink communications regardless of the receive time in cycle 1 or the receive time in cycle 2. The receive side uplink message is stopped at the intersection of the non-receive times in cycle 1 and cycle 2. That is, the PUE is configured to receive and/or transmit data for the duration of the receive time.

For example, as shown in FIG. 7, the PUE performs sidelink communications, including the reception and/or transmission of sidelink data, for a duration of L1+ L2.

In practical applications, the first terminal may be configured with a plurality of resource pools, and each piece of configuration information corresponds to each resource pool, that is, each piece of configuration information is granular with respect to the resource pools. Then two different configuration information correspond to two different resource pools, and the DRX parameters of the two different resource pools may be different. Thus, how the terminal selects the DRX parameters, the present application provides some possible implementations.

It is assumed that the first terminal further obtains second configuration information, where the second configuration information is used to indicate a third parameter used for DRX by the first terminal, and the second configuration information corresponds to a second resource pool, that is, the second configuration information is configured on the second resource pool. And the terminals working on the second resource pool are all configured with the same third parameter. That is, the second configuration information is configured for each resource pool, and the terminal configured with the same resource pool obtains the same third parameter.

In this way, the first terminal acquires the first configuration information and the second configuration information, and acquires the first parameter and the third parameter for DRX in common. The first parameter and the third parameter are different. The terminal may engage in sidelink communications in any one or more of the following combinations.

As shown in fig. 8, it is assumed that the first parameter includes a first DRX cycle including a first reception time and a first non-reception time. The third parameter includes a second DRX cycle including a second reception time and a second non-reception time.

The first terminal receives the sidelink message and the first terminal may transmit the sidelink message during a common time L1 between the first reception time and the second reception time.

During a common time L2 between the first reception time and the second non-reception time, the first terminal receives the sidelink message in the first resource pool and stops receiving the sidelink message in the second resource pool. It can be understood that the first terminal may transmit data to other terminals in the first resource pool, and may also receive data of other terminals. The first terminal does not receive data of other terminals in the second resource pool. For example, assuming that the second terminal and the first terminal perform the sidelink communication in the first resource pool and the third terminal and the first terminal perform the sidelink communication in the second resource pool, it can be understood that the first terminal may receive the sidelink message of the second terminal but stops receiving the sidelink message of the third terminal during the common time of the first receiving time and the second non-receiving time.

Alternatively, the first terminal may also receive the sidelink message including the sidelink message received from the first resource pool and the sidelink message received from the second resource pool within a common time L2 between the first reception time and the second non-reception time.

Alternatively, the first terminal may not receive the sidelink message, including not receiving the sidelink messages of the first resource pool and not receiving the sidelink messages of the second resource pool, during the common time L2 between the first receiving time and the second non-receiving time.

Similarly, during the common time L3 between the first non-reception time and the second reception time, the first terminal receives the sidelink message in the second resource pool and stops receiving the sidelink message in the first resource pool.

Alternatively, the first terminal may also receive the sidelink message including the sidelink message received from the first resource pool and the second resource pool during the common time L3 between the first non-reception time and the second reception time.

Alternatively, the first terminal may not receive the sidelink message, including not receiving the sidelink messages of the first resource pool and not receiving the sidelink messages of the second resource pool, during the common time L3 between the first non-receiving time and the second receiving time.

The reception of the sidelink message is stopped for a common time L4 of the first non-reception time and the second non-reception time. The side link message can also be stopped from being sent, or the resources can be determined by randomly selecting the resources, and the side link message can be sent on the randomly selected resources.

The above modes can be used independently or in combination. Optionally, the first terminal may further obtain indication information, and determine a DRX manner according to the indication information, where the DRX manner may be any one or a combination of multiple of the foregoing manners. The indication information may be in the form of RRC signaling, MAC CE, SIB or MIB.

The common time is the intersection of the two times.

In the method described above in this embodiment of the present application, the first parameter is a parameter used by the first terminal for DRX, the first parameter is introduced by taking a DRX cycle as an example, and the first parameter may be any one of the following parameters: an SL DRX duration timer (DRX-onDurationTimer), an SL DRX deactivation timer, an SL DRX HARQ RTT timer, or an SL DRX retransmission timer, an SL DRX cycle start offset. The configuration and usage method of other parameters may refer to the description of the DRX cycle.

After receiving the configuration information of the DRX, the first terminal may perform sidelink communication according to the configuration information of the DRX, and discontinuously receive the sidelink message. In another manner, the first terminal may obtain an activation instruction for activating DRX or a deactivation instruction for deactivating DRX. Activation may also be referred to as enabling and deactivation may also be referred to as de-enabling. Activating DRX may be described as enabling DRX and deactivating DRX may be described as de-enabling DRX. For example, the first terminal acquires fifth indication information, where the fifth indication information is used to indicate that the first terminal activates or deactivates DRX. The first terminal may receive fifth indication information from the network device, in which case the fifth indication information may be RRC signaling, MAC CE, MIB, or SIB. The first terminal may also receive fifth indication information from other terminals, in which case the fifth indication information may be SCI, PC5 RRC, MAC, or MAC CE, for example, if the first terminal receives the fifth indication information of the second terminal, the fifth indication information may indicate whether the second terminal activates DRX, or the fifth indication information may indicate whether the first terminal activates DRX. Alternatively, the fifth indication information may be a priority field in the SCI. For example, when the priority field in the SCI indicates the highest priority, the second terminal is instructed to deactivate DRX.

It should be noted that the examples in the application scenarios in the present application only show some possible implementations, and are for better understanding and description of the method in the present application. Those skilled in the art can obtain some examples of evolution forms according to the sidelink communication method provided by the application.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is described by taking the first terminal as an example from the perspective of the terminal. In order to implement the functions in the method provided by the embodiment of the present application, the terminal may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

As shown in fig. 9, based on the same technical concept, an embodiment of the present application further provides a communication apparatus 900, where the communication apparatus 900 may be a terminal or a network device, or an apparatus in the terminal or the network device, or an apparatus capable of being used in cooperation with the terminal or the network device. In one design, the communication apparatus 900 may include a module corresponding to one to perform the method/operation/step/action performed by the terminal in the foregoing method embodiment, where the module may be a hardware circuit, or may be software, or may be implemented by combining a hardware circuit and a software circuit. In one design, the communications apparatus 900 may include a processing module 901 and a communications module 902. The processing module 901 is used to invoke the communication module 902 to perform the receiving and/or transmitting functions.

When the communication apparatus 900 is used to perform operations performed by a terminal:

the processing module 901 is configured to obtain the first configuration information, and the first configuration information may be obtained through the communication module 902. The first configuration information is used for configuring DRX parameters used by the first terminal in the sidelink communication. For example, the first configuration information is used to indicate a first parameter used by the first terminal for DRX, the first configuration information uses the resource pool as a granularity, and the first configuration information corresponds to the first resource pool.

The communication module 902 is configured to perform sidelink communication according to the first configuration information.

For example, the communication module 902 is configured to perform the sidelink communication discontinuously according to the DRX parameter indicated by the first configuration information.

When the communications apparatus 900 is used to perform operations performed by a network device:

a processing module 901, configured to generate first configuration information;

a communication module 902, configured to send the first configuration information to the first terminal, where the first configuration information is used to configure DRX parameters used by the first terminal during sidelink communication. For example, the first configuration information is used to indicate a first parameter used by the first terminal for DRX, the first configuration information uses the resource pool as a granularity, and the first configuration information corresponds to the first resource pool.

The communication module 902 is also used for executing other receiving or transmitting steps or operations executed by the terminal or the network device in the above method embodiments. The processing module 901 may also be configured to execute other corresponding steps or operations, except for transceiving, executed by the terminal or the network device in the foregoing method embodiments, which are not described in detail herein.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Fig. 10 shows a communication apparatus 1000 according to an embodiment of the present application, configured to implement the functions of the terminal or the network device in the foregoing method. The communication device may be a terminal or a network device, or may be a device in the terminal or the network device, or may be a device capable of being used with the terminal or the network device. The communication device 1000 may be a chip system. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The communication apparatus 1000 includes at least one processor 1020 for implementing the functions of the terminal or the network device in the methods provided by the embodiments of the present application. The communications device 1000 may also include a communications interface 1010. In embodiments of the present application, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface for communicating with other devices over a transmission medium. For example, communication interface 1010 enables an apparatus in communications apparatus 1000 to communicate with other devices.

Illustratively, when the communication apparatus 1000 is used to perform operations performed by a terminal:

the processor 1020 is configured to obtain, by using the communication interface 1010, first configuration information, where the first configuration information is used to configure a DRX parameter used by the first terminal during sidelink communication, for example, the first configuration information is used to indicate a first parameter used by the first terminal for DRX, the first configuration information uses a resource pool as a granularity, and the first configuration information corresponds to the first resource pool; the processor 1020 is further configured to perform a sidelink communication in accordance with the first configuration information using the communication interface 1010.

When the communication apparatus 1000 is used to perform operations performed by a network device:

a processor 1020 for generating first configuration information;

a communication interface 1010, configured to send the first configuration information to the first terminal, where the first configuration information is used to configure DRX parameters used by the first terminal in sidelink communication. For example, the first configuration information is used to indicate a first parameter used by the first terminal for DRX, the first configuration information uses the resource pool as a granularity, and the first configuration information corresponds to the first resource pool.

The processor 1020 and the communication interface 1010 may also be configured to perform other corresponding steps or operations performed by the terminal or the network device according to the foregoing method embodiments, which are not described herein again.

The communications apparatus 1000 can also include at least one memory 1030 for storing program instructions and/or data. A memory 1030 is coupled to the processor 1020. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. Processor 1020 may operate in conjunction with memory 1030. Processor 1020 may execute program instructions stored in memory 1030. At least one of the at least one memory may be included in the processor.

The specific connection medium among the communication interface 1010, the processor 1020 and the memory 1030 is not limited in the embodiments of the present application. In the embodiment of the present application, the memory 1030, the processor 1020, and the communication interface 1010 are connected by a bus 1040 in fig. 10, the bus is represented by a thick line in fig. 10, and the connection manner between other components is merely illustrative and not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 10, but this is not intended to represent only one bus or type of bus.

When the communication apparatus 900 and the communication apparatus 1000 are specifically chips or chip systems, baseband signals may be output or received by the communication module 902 and the communication interface 1010. When the communication apparatus 900 and the communication apparatus 1000 are specifically devices, the communication module 902 and the communication interface 1010 may output or receive radio frequency signals.

In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory 1030 may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

Some or all of the operations and functions performed by the terminal described in the above method embodiments of the present application may be implemented by a chip or an integrated circuit.

In order to implement the functions of the communication device described in fig. 9 or fig. 10, an embodiment of the present application further provides a chip, which includes a processor and is configured to support the communication device to implement the functions related to the terminal in the foregoing method embodiment. In one possible design, the chip is connected to or includes a memory for storing the necessary program instructions and data of the communication device.

The embodiment of the application provides a computer readable storage medium, which stores a computer program, wherein the computer program comprises instructions for executing the method embodiment.

Embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the above-described method embodiments.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A method of sidelink communication, comprising:

a first terminal acquires first configuration information, wherein the first configuration information is used for indicating a first parameter of the first terminal for Discontinuous Reception (DRX), and the first configuration information takes a resource pool as granularity;

and the first terminal carries out side-link communication according to the first configuration information.

2. The method of claim 1, wherein said first parameter comprises a first period, one said first period comprising a first receive time and a first non-receive time;

the first terminal performs sidelink communication according to the first configuration information, including:

the first terminal receives a sidelink message at the first receiving time;

and the first terminal stops receiving the side link message at the first non-receiving time.

3. The method of claim 2, wherein the first terminal performs sidelink communications based on the first configuration information, further comprising:

the first terminal randomly selects resources to transmit a sidelink message at the first non-reception time.

4. The method according to any of claims 1 to 3, wherein the first configuration information is further used to indicate at least one second parameter for DRX for the first terminal;

the method further comprises the following steps:

the first terminal acquires first indication information; the first indication information is used for indicating the first terminal to carry out sidelink communication according to the first parameter or the second parameter.

5. The method according to any of claims 1 to 4, wherein the first configuration information is further used to indicate at least one third parameter for DRX for the first terminal;

the method further comprises the following steps:

the first terminal sends second indication information to a second terminal; wherein the second indication information is used for indicating the first terminal to perform sidelink communication according to the first parameter or the third parameter.

6. A method according to any of claims 1 to 3, wherein the first parameter comprises a first value and at least one second value;

the method further comprises the following steps:

and the first terminal acquires third indication information, wherein the third indication information is used for indicating the first terminal to carry out the sidelink communication according to the first value or the second value.

7. The method according to any one of claims 1 to 3 and 6, wherein the first parameter comprises a first value and at least one second value;

the method further comprises the following steps:

and the first terminal sends fourth indication information to the second terminal, wherein the fourth indication information is used for indicating the first terminal to carry out the sidelink communication according to the first value or the second value.

8. The method of claim 1, wherein the method further comprises: the first terminal acquires second configuration information, wherein the second configuration information is used for indicating a fourth parameter used for DRX of the first terminal, the first configuration information corresponds to a first resource pool, and the second configuration information corresponds to a second resource pool;

the fourth parameter includes a second period, one of the second periods including a second reception time and a second non-reception time;

the first terminal carries out side link communication according to the first configuration information and the second configuration information; wherein the first terminal receives a sidelink message within a common time of the first reception time and the second reception time.

9. The method of claim 8, wherein the first terminal receives sidelink messages in the first resource pool and stops receiving sidelink messages in the second resource pool during a common time between the first receive time and the second non-receive time.

10. The method of claim 8, wherein the first terminal stops receiving and/or sending sidelink messages during a common time of the first receive time and the second non-receive time.

11. The method of claim 8, wherein the first terminal receives and/or transmits a sidelink message during a common time of the first receive time and the second non-receive time.

12. The method of any one of claims 1 to 11, further comprising:

the first terminal acquires fifth indication information, wherein the fifth indication information is used for indicating the first terminal to activate DRX, or the fifth indication information is used for indicating the first terminal to deactivate DRX.

13. The method of any one of claims 1 to 12, wherein the first configuration information comprises any one of: radio resource control, RRC, media access control, MAC, signaling, media access layer control, MAC CE, system information block, SIB, or master information block, MIB.

14. A method of sidelink communication, comprising:

the network equipment generates first configuration information;

the network equipment sends the first configuration information to a first terminal, wherein the first configuration information is used for indicating a first parameter used for Discontinuous Reception (DRX) of the first terminal, and the first configuration information takes a resource pool as granularity.

15. The method of claim 14, wherein the first configuration information is further for indicating at least one second parameter for DRX by the first terminal; the first parameter includes a first periodicity and the second parameter includes a second periodicity.

16. The method of claim 15, wherein the network device instructs the first terminal to use the first parameter or the second parameter for sidelink communications.

17. The method of claim 14, wherein the first parameter comprises a first value and at least one second value; the first value comprises a first period and the second value comprises a second period.

18. The method of claim 17, wherein the network device instructs the first terminal to use the first value or the second value for sidelink communications.

19. The method of any one of claims 14 to 18, further comprising:

the network device sends second configuration information to the first terminal, wherein the second configuration information is used for indicating a fourth parameter used for DRX by the first terminal, the second configuration information takes a resource pool as granularity, the first configuration information corresponds to the first resource pool, and the second configuration information corresponds to the second resource pool.

20. The method of any of claims 14 to 19, wherein the first configuration information is further operable to instruct the first terminal to activate DRX or deactivate DRX.

21. The method of any one of claims 14 to 19, further comprising:

and the network equipment sends indication information to the first terminal, wherein the indication information is used for indicating the first terminal to activate DRX, or the indication information is used for indicating the first terminal to deactivate DRX.

22. A communication device, characterized in that the device is adapted to perform the method according to any of claims 1-13.

23. A communication apparatus, characterized in that the apparatus is adapted to perform the method of any of claims 14 to 21.

24. A communications apparatus, comprising: a processor coupled to a memory, the memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1-13.

25. A communications apparatus, comprising: a processor coupled to a memory, the memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 14 to 21.

26. A communication system comprising a communication apparatus according to claim 22 and a communication apparatus according to claim 23.

27. A computer-readable storage medium having computer-readable instructions stored thereon, wherein the computer-readable instructions, when executed on a communication device, cause the method of any of claims 1-13 to be performed or cause the method of any of claims 14-21 to be performed.