CN113453317B

CN113453317B - Side-link communication method and device

Info

Publication number: CN113453317B
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: 2024-01-05
Anticipated expiration: 2040-03-25
Also published as: WO2021190392A1; CN113453317A

Abstract

A method and apparatus for side-link communication are provided for improving the quality of side-link communication. The method is applied to the terminal, and comprises the following steps: the terminal obtains configuration information, where the configuration information is used for configuring a DRX parameter used by the terminal in side uplink communication, for example, the configuration information is used for indicating a first parameter used by the terminal for DRX, and the configuration information is with a resource pool as granularity, i.e. one resource pool corresponds to a set of DRX parameters, for example, the configuration information corresponds to the first resource pool. The terminal performs side-link communication according to the configuration information.

Description

Side-link communication method and device

Technical Field

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

Background

The Sidelink (SL) is a communication from terminal to terminal. In the side-link, the transmitting end sends information to the receiving end via a physical layer side-line control channel (physical sidelink control channel, PSCCH) used to carry side-line control information (sidelink control information, SCI), the SCI containing parameters required for demodulating and decoding the physical layer side-line shared channel (physical sidelink shared channel, PSSCH), the PSSCH used to carry data. The receiving end acquires parameters required by demodulation and decoding PSSCH through blind detection of PSCCH sent by the sending end, and then receives the PSSCH.

In the prior art, a terminal needs to monitor or blindly detect PSCCH sent by other terminals all the time, so that great power consumption is brought to the terminal.

Disclosure of Invention

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

In a first aspect, a method of side-link communication 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 for configuring a discontinuous reception (discontinuous reception, DRX) parameter used by the first terminal in side uplink communication, for example, the first configuration information is used for indicating a first parameter used by the first terminal for DRX, the first configuration information uses a resource pool as granularity, and the first configuration information corresponds to the first resource pool; and the first terminal performs side uplink communication according to the first configuration information. For example, the first terminal discontinuously performs the side-uplink communication according to the DRX parameter indicated by the first configuration information.

In the embodiment of the present invention, since the first configuration information is with the granularity of the resource pool, the DRX parameters configured by the terminals operating on one resource pool are the same, that is, the receiving time and the non-receiving time in one period are aligned, so that the terminals operating in one resource pool can perform the side-link communication in the same receiving time, thereby avoiding the problem that the two terminals cannot communicate due to no intersection of the receiving times, improving the quality of the side-link communication, implementing the application of the DRX technology of the side-link communication, and reducing the power consumption of the terminals. In addition, the DRX parameters are configured through the network equipment, the DRX parameters are not required to be configured between the terminals, and signaling waste caused by the configuration of the DRX parameters between the terminals is saved.

In one possible design, the DRX parameters may be varied, e.g., the DRX parameters may include a DRX cycle, abbreviated cycle. The first parameter includes a first period, and one of the first periods includes a first receiving time and a first non-receiving time; the first terminal receives a side uplink message at the first receiving time; the first terminal stops receiving the side uplink message at the first non-reception time. In this way, the first terminal can receive the discontinuous side uplink message, and by stopping receiving the side uplink message in the first non-receiving time, it is not necessary to monitor the control signaling sent by other terminals, and the power consumption of the terminal can be effectively reduced.

Alternatively, the first terminal may also transmit the side uplink message at the first reception time. The first reception time within one period may be used for receiving and transmitting side uplink messages. The first terminal randomly selects resources to transmit a side uplink message at the first non-reception time. Since the first terminal cannot monitor PSCCH of other terminals in the first non-reception time and cannot select resources by a sensing (sending) manner, but the manner of randomly selecting resources does not need to monitor PSCCH of other terminals, the first terminal can randomly select resources in the first non-reception time and send a side uplink message on the randomly selected resources.

In one possible design, the first configuration information is further used to indicate at least one second parameter of the first terminal for DRX. When 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 the first terminal will use to perform side-link communication.

An alternative solution is: the first terminal acquires first indication information; the first indication information is used for indicating the first terminal to perform side-link communication according to the first parameter or the second parameter.

Alternatively, the first terminal sends second indication information to the second terminal; the second indication information is used for indicating the first terminal to perform side uplink communication according to the first parameter or the second parameter. Thus, the first terminal can select proper parameters according to the service type, service characteristics and power saving requirements of the first terminal.

In one possible design, the first parameter corresponding to the first resource pool has a plurality of values, e.g., 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 side-link communications and some alternatives are presented in the embodiments of the present application.

In an alternative solution, the first terminal obtains third indication information, where the third indication information is used to instruct the first terminal to perform side uplink communication according to the first value or the second value.

In another alternative, the first terminal sends fourth indication information to the second terminal, where the fourth indication information is used to instruct the first terminal to perform side uplink communication according to the first value or the second value. Thus, the first terminal can select a proper parameter value according to the service type or service characteristic of the first terminal.

Alternatively, the first terminal sends fifth indication information to the second terminal, where the fifth indication information is used to instruct the second terminal to perform side-link communication according to the first parameter or the second parameter. Thus, the first terminal can select appropriate parameters according to the service type or service characteristics of the first terminal.

Alternatively, the first terminal sends sixth indication information to the second terminal, where the sixth indication information is used to instruct the second terminal to perform side-link communication according to the first value or the second value. Thus, the first terminal can select a proper parameter value according to the service type or service characteristic of the first terminal.

In one possible design, the first terminal may further obtain second configuration information, where the second configuration information is similar to the first configuration information and is also granular with respect to the resource pool, 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 of the first terminal for DRX, and the second configuration information corresponds to a second resource pool. The first terminal may perform side-link communication in combination with the first parameter and the third parameter.

For example, the third parameter comprises a second period, one of the second periods comprising a second time of receipt and a second time of non-receipt; the first terminal performs side uplink communication according to the first configuration information and the second configuration information; wherein the first terminal receives a side uplink message within a common time of the first reception time and the second reception time, which may be denoted as mode 0.

There are several possible implementations of how the first terminal performs the side-link transmission when it receives both sets of configuration information.

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

In mode 2, the first terminal stops receiving and/or stopping transmitting the side uplink message in a common time of the first reception time and the second non-reception time.

In mode 3, the first terminal receives and/or transmits a side uplink message in a common time of the first reception time and the second non-reception time.

Mode 4, the first terminal receives instruction information from other terminals or network devices, and determines which mode to use for side-link communication according to the instruction information, wherein the content of the instruction may be any one or more of 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 disabling may also be referred to as deactivating. In this way, it is possible to align when the first terminal uses DRX, and when DRX is disabled, the first terminal can listen to the PSCCH in an existing manner.

In one possible design, the first configuration information includes any one of the following: a radio resource control RRC message, medium access control MAC signaling, medium access layer control element 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 lateral control information SCI. SCI is terminal-to-terminal sent and may be carried in PSCCH. The respective 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, denoted as a first terminal, or a device (e.g. a chip, or a system on a chip, or a circuit) in the first terminal, or a device that can be used in a matching manner with the first terminal. In one design, the communication device may include modules corresponding to the methods/operations/steps/actions described in the first aspect, where the modules may be hardware circuits, software, or a combination of hardware circuits 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 transmitting function. Illustratively:

a processing module, configured to obtain first configuration information, where the first configuration information is used to configure a discontinuous reception (discontinuous reception, DRX) parameter used by a first terminal in side uplink communications, 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 granularity, and the first configuration information corresponds to the first resource pool; the communication module is used for carrying out side-link communication according to the first configuration information. For example, the communication module is configured to perform side-link communication discontinuously according to the DRX parameter indicated by the first configuration information.

In the embodiment of the present invention, since the first configuration information is with the granularity of the resource pool, the DRX parameters configured by the terminals operating on one resource pool are the same, that is, the receiving time and the non-receiving time in one period are aligned, so that the terminals operating in one resource pool can perform the side-link communication in the same receiving time, thereby avoiding the problem that the two terminals cannot communicate due to no intersection of the receiving times, improving the quality of the side-link communication, implementing the application of the DRX technology of the side-link communication, and reducing the power consumption of the terminals. In addition, the DRX parameters are configured through the network equipment, the DRX parameters are not required 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 varied, e.g., the DRX parameters may include a DRX cycle, abbreviated cycle. The first parameter includes a first period, and one of the first periods includes a first receiving time and a first non-receiving time; the first terminal receives a side uplink message at the first receiving time; the first terminal stops receiving the side uplink message at the first non-reception time. In this way, the first terminal can receive the discontinuous side uplink message, and by stopping receiving the side uplink message in the first non-receiving time, it is not necessary to monitor control signaling and data sent by other terminals, and the power consumption of the terminal can be effectively reduced.

Optionally, the communication module is further configured to send the side uplink message at the first receiving time. The first receive time within one period may be used to turn on the receive and transmit side uplink messages. The communication module is further configured to randomly select a resource to transmit a side-link message at the first non-reception time. Since the first terminal cannot monitor PSCCH of other terminals in the first non-reception time and cannot select resources by a sensing (sending) manner, but the manner of randomly selecting resources does not need to monitor PSCCH of other terminals, the first terminal can randomly select resources in the first non-reception time and send a side uplink message on the randomly selected resources.

In one possible design, the first configuration information is further used to indicate at least one second parameter of the first terminal for DRX. When the communication module receives the first configuration information, the processing module determines which parameter is to be used for performing the side-link communication, where the first configuration information includes the first parameter and at least one second parameter.

An alternative solution is: the communication module is also used for acquiring first indication information; the first indication information is used for indicating the first terminal to perform side-link communication according to the first parameter or the second parameter.

Alternatively, 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 perform side uplink communication according to the first parameter or the second parameter. Thus, the first terminal can select appropriate parameters according to the service type or service characteristics of the first terminal.

In one possible design, the first parameter corresponding to the first resource pool has a plurality of values, e.g., 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 use for side-link communications according to the communications module, and some alternatives are presented in the embodiments of the present application.

In an alternative solution, the communication module is configured to obtain third indication information, where the third indication information is used to instruct the first terminal to perform side uplink communication according to the first value or the second value.

In another alternative, the communication module is configured to send fourth indication information to the second terminal, where the fourth indication information is used to instruct the first terminal to perform side uplink communication according to the first value or the second value. Thus, the first terminal can select a proper parameter value according to the service type or service characteristic of the first terminal.

In one 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 granular with respect to the resource pool, 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 of the first terminal for DRX, and the second configuration information corresponds to a second resource pool. The first terminal may perform side-link communication in combination with the first parameter and the second parameter.

For example, the third parameter comprises a second period, one of the second periods comprising a second time of receipt and a second time of non-receipt; the communication module is used for performing side uplink communication according to the first configuration information and the second configuration information; wherein the communication module is configured to receive a side uplink message during a common time of the first reception time and the second reception time, which may be denoted as mode 0.

Regarding how the communication module performs the side-link transmission when the parameters are different when it receives the two sets of configuration information, there are several possible implementations.

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

In mode 2, the communication module is configured to stop receiving and/or stop transmitting the side uplink message in a common time of the first reception time and the second non-reception time.

In mode 3, the communication module is configured to receive and/or transmit a side uplink message in 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 other terminals or network devices, and the processing module is configured to determine, according to the indication information, which mode to use for performing side-link communication, 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 obtain 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 disabling may also be referred to as deactivating. In this way, it is possible to align when the first terminal uses DRX, and when DRX is disabled, the first terminal can listen to the PSCCH in an 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 lateral control information SCI. SCI is terminal-to-terminal sent and may be carried in PSCCH. The above respective indication information may occupy reserved bits in the SCI.

In a third aspect, a communication apparatus is provided that includes a communication interface for communicating, such as for transceiving data or signals, with other devices, and a processor. By way of example, the communication interface may 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 configured 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 for by the processor. The memory is coupled to the processor, and the processor may implement the method described in the first aspect when executing the instructions or data stored in the memory.

In a fourth aspect, a method of side-link communication is provided, the method being executable by a network device, the method comprising the steps of: 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 explanation, function or introduction of the first configuration information may refer to the first aspect, and will not be repeated here.

In one possible design, the first configuration information is further used to indicate at least one second parameter of the first terminal for DRX; the first parameter and the second parameter are of the same type, e.g. the first parameter and the second parameter are both periodic, then the first parameter may be a first period and the second parameter may be a second period, the first period and the second period being different.

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

The network device may also instruct the terminal which parameter to use for the side-link communication when the first configuration information indicates the first parameter and the at least one second parameter. For example, the network device instructs the terminal to use the first parameter for measurement link communication or instructs the terminal to use the second parameter for measurement link communication.

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

The network device may also instruct the terminal which value to use for the side-link communication when the first parameter comprises the first value and at least one second value. For example, the network device instructs the terminal to use the first value for measurement link communication or instructs the terminal to use the second value for measurement link communication.

In one possible design, the network device sends indication information to the first terminal, where the indication information is used to instruct the first terminal to activate DRX, or the indication information is used to instruct the first terminal to deactivate DRX. When the DRX is not indicated to the terminal, the terminal may employ a conventional reception manner, so that a compatible effect can be achieved with the conventional manner. Optionally, the network device may also instruct the first terminal to activate or deactivate DRX through the first configuration information.

Optionally, the network device may further configure the first terminal with two sets of configuration information, such as sending the first configuration information and at least one second configuration information to the first terminal. In this case, the network device may also transmit to the terminal indication information for indicating what manner the terminal uses for the side-link communication. The mode may be any one or more of modes 0 to 3 described in the first aspect.

Advantageous effects of the method according to the fourth aspect may be described with reference to effects corresponding to the corresponding features of the first aspect, which are not described here again.

In a fifth aspect, a communication apparatus is provided, which may be a network device, an apparatus (e.g., a chip, or a system on a chip, or a circuit) in a network device, or an apparatus that can be used in cooperation with a network device. In one design, the communication device may include modules corresponding to the methods/operations/steps/actions described in the second aspect, where the modules may be hardware circuits, software, or a combination of hardware circuits 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 transmitting function. Illustratively:

The processing module is used for generating first configuration information, the communication module is used for sending the first configuration information to a first terminal, 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 explanation, function or introduction of the first configuration information may refer to the first aspect, and will not be repeated here.

The processing module is further configured to instruct the terminal, via the communication module, which parameter to use for the side-link 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.

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

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 instruct the first terminal to activate DRX, or the fifth indication information is used to instruct the first terminal to deactivate DRX. When the DRX is not indicated to the terminal, the terminal may employ a conventional reception manner, so that a compatible effect can be achieved 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 being used to instruct the terminal what manner to use for the side-link communication. The mode may be any one or more of modes 0 to 3 described in the first aspect.

Advantageous effects of the method according to the fifth aspect may be described with reference to effects corresponding to the corresponding features of the fourth aspect, which are not described herein.

In a sixth aspect, a communication apparatus is provided that includes a communication interface for communicating, such as for transceiving data or signals, with other devices, and a processor. By way of example, the communication interface may 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 invoke a set of programs, instructions or data to perform the method described in the fourth aspect above. The communication device may also include a memory for storing programs, instructions or data called for by the processor. The memory is coupled to the processor, and the processor may implement the method described in the fourth aspect when executing instructions or data stored in the memory.

In a seventh aspect, embodiments of the present application further provide a computer readable storage medium having stored therein computer readable instructions that, when run 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, embodiments of the present application provide a chip system, where the chip system includes a processor and may further include a memory, where the processor is configured to implement the method in any one of the foregoing first aspect, the fourth aspect, any one of the foregoing possible designs of the first aspect, or any one of the foregoing possible designs of the fourth aspect. The chip system may be formed of a chip or may include a chip and other discrete devices.

In a ninth aspect, embodiments of the present application provide a communication system, the communication system comprising a first terminal and a network device, the first terminal being configured to perform the method as described in the first aspect or any one of the possible designs of the first aspect; and/or the network device is configured to perform the method as described in the fourth aspect or any one of the possible designs of the fourth aspect.

In a tenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method as described in any one of the possible designs of the first aspect and the first aspect above; and/or the network device is configured 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 schematic diagram of a mode of side-link resource allocation in an embodiment of the present application;

fig. 4 is a schematic diagram of a periodic receiving side uplink message in an embodiment of the present application;

fig. 5 is a schematic flow chart of a method of side-link communication in an embodiment of the present application;

fig. 6 is a schematic diagram of a plurality of terminal side uplink communication methods according to an embodiment of the present application;

fig. 7 is a schematic diagram of a downlink communication method configured with different periods in an embodiment of the present application;

fig. 8 is a schematic diagram of a downlink communication method under multiple sets of configuration information in an embodiment of the present application;

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

fig. 10 is a schematic diagram of a second communication device according to an embodiment of the present application.

Detailed Description

The embodiment of the application provides a side-link communication method and device, which are used for improving the side-link communication quality. The method and the device are based on the same or similar technical conception, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated. In the description of the embodiment of the present application, "and/or" describing the association relationship of the association object indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. Reference to at least one in this application refers to one or more; plural means two or more. In addition, it should be understood that in the description of this application, the words "first," "second," "third," and the like are used merely for distinguishing between the descriptions and not for indicating or implying any particular importance or order. Reference in the 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 application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The side-link communication method provided in the embodiments of the present application may be applied to a fourth-generation (4th generation,4G) communication system, such as long term evolution (long term evolution, LTE), and may also be applied to a fifth-generation (5th generation,5G) communication system, such as a 5G New Radio (NR). And may also be applied to various future communication systems, such as the sixth generation (6th generation,6G) communication system.

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

Fig. 1 illustrates an architecture of one possible communication system to which the side-link communication method provided in the embodiments 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 terminal may be hardware, software functionally divided, or a combination of hardware and software. In addition, a plurality of terminals 102 may also constitute a communication system. Communication between the network device and the terminal may be through other devices or network elements. The network device 101 may send downlink data to the terminal 102, or may receive uplink data sent by the terminal 102. Of course, the terminal 102 may transmit uplink data to the network device 101, or may receive downlink data transmitted by the network device 101. The communication between the terminals 102 and 102 may be performed, and the link between the terminals 102 and 102 is referred to as a side-link.

The network device 101 is a node in a radio access network (radio access network, RAN), which may also be referred to as a base station, and which may also be referred to as a RAN node (or device). Currently, some examples of network devices 101 are: the network device 101 may also be a satellite or future base station, which may also be referred to as an altitude platform, an aerial vehicle, or a satellite base station (AP), a next generation base station (next generation nodeB, gNB), a next generation evolved base station (next generation evolved nodeB, ng-eNB), a transmission reception point (transmission reception point, TRP), an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), or a wireless fidelity (wireless fidelity, wifi) Access Point (AP). Network device 101 may also be a network device in a future possible communication system. In the embodiments of the present application, the network device or the base station may be used to describe the above device.

The terminal 102, which may be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), a terminal device, etc., 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, an in-vehicle device, and the like having a wireless connection function. The terminal 102 may be: a mobile phone, a tablet, a laptop, a palmtop, a mobile internet device (mobile internet device, MID), a wearable device (e.g., a smartwatch, a smartband, a pedometer, etc.), a vehicle-mounted device (e.g., an automobile, a bicycle, an electric car, an airplane, a ship, a train, a high-speed rail, etc.), a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in an industrial control (industrial control), a smart home device (e.g., a refrigerator, a television, an air conditioner, an electric meter, etc.), a smart robot, a workshop device, a wireless terminal in a drone (self driving), a wireless terminal in a teleoperation (remote medical surgery), a wireless terminal in a smart grid (smart grid), a wireless terminal in a transportation security (transportation safety), a wireless terminal in a smart city (smart city), or a wireless terminal in a smart home (smart home), a flying device (e.g., a smart robot, a hot balloon, an airplane, etc.

The side-link communication in the embodiments of the present application may be, for example, a Device-to-Device (D2D) communication. The communication between terminals can be directly carried out, so that the communication flow can be simplified, and the communication time delay can be reduced. For example, the side-link communication may also be a vehicle-to-X (V2X) communication with other devices, such as a vehicle-to-vehicle communication (vehicle to vehicle, V2V), a vehicle-to-road communication (vehicle to installation, V2I), a vehicle-to-pedestrian communication (vehicle to pedestrian, V2P).

Terminals performing side-link communications need to acquire side-link communication resources first. Some possible side-link resource allocation approaches are described below.

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

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

In general, the modes of side-uplink resource allocation may include two modes, mode one and mode two, as described below.

Mode one: the terminal performs side-link communication and requires the network device to perform resource allocation. For example, as shown in fig. 3, before performing the sidelink communication, the terminal needs to send a sidelink communication scheduling request to the network device, the network device receives the sidelink communication scheduling request and then sends downlink control signaling (downlink control information, DCI) to indicate physical uplink shared channel (physical uplink shared channel, PUSCH) resources, the terminal sends a sidelink buffer report to the network device, the network device allocates sidelink communication resources to the terminal, and sends DCI to indicate the allocated sidelink communication resources to the terminal, and the terminal performs the sidelink communication according to the sidelink communication resources indicated by the DCI.

Mode two: the terminal does not need the network equipment to allocate resources for the side link communication, but autonomously selects the side link resources from a resource pool preconfigured by the network equipment. For example, the terminal may acquire the side-link resources through a sensing (transmitting) procedure. The terminal will send sidestream control information (sidelink control information, SCI). The terminal obtains the information occupied by other terminal resources by decoding SCI of other terminals or performing side uplink measurement, and the terminal can select resources not occupied by other terminals according to the result of sending. Wherein the SL measurement is based on a value (sidelink reference signal received power, SL-RSRP) of the received power of the side-uplink reference signal obtained when decoding the SCI.

Based on the above examples of modes of LTE two side-link resource allocation, in the embodiment of the present application, when a terminal performs side-link communication, two modes are optionally used for side-link communication. One mode is that the terminal performs side-link communication according to side-link resources allocated by the network device in a resource pool configured or preconfigured by the network device; in another mode, the terminal autonomously selects a sidelink resource for sidelink communication from a resource pool configured by the network device or a resource pool pre-configured by the network device, and performs sidelink communication. The resource pool in the embodiment of the present application may include one or more time-frequency resources, or may be regarded as a set of time-frequency resources.

Of course, the embodiments of the present application are not limited to the two methods of acquiring the side uplink resources described above. After acquiring the side link resources, the terminal needs to monitor the PSCCH of other terminals when performing side link communication, and according to SCI in the PSCCH of other terminals, the PSSCH sent by the other terminals can be demodulated and decoded to acquire data in the PSSCH sent by the other terminals, so that the side link communication is completed. If the terminal is required to blindly detect the PSCCH sent by other terminals, the terminal can bring great power consumption to the terminal if the terminal is always blind-detected or always monitors the PSCCH.

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 listening to the PSCCH, in the embodiment of the present application, a technology of discontinuous reception (discontinuous reception, DRX) is introduced in the side-link communication.

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

If the terminal performs the side-link communication by adopting the DRX technology, some parameters of the DRX need to be acquired. The transmitting-side terminal may transmit the DRX parameter 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 two terminals for side-link communication may not have an intersection of reception times (ON), which may not be able to perform side-link communication. The embodiment of the application provides a side-link communication method, which can solve the problem.

The following describes the side-link communication method provided in the embodiment of the present application in detail, as shown in fig. 5, and specific steps are described below.

S501, the first terminal acquires first configuration information.

The first configuration information is used to indicate a first parameter of 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 area of the network device, the first configuration information of the first terminal may also be preconfigured, where the first terminal may further update according to the received first configuration information of the network device when entering the coverage area of the network device.

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

The first parameter may be referred to as a first DRX parameter, which is some parameter related to DRX when the first terminal adopts the DRX technology. The first parameter may be one or more. For example, the first parameter may include a side DRX cycle (SL DRX cycle) that includes a length of a reception time within the side DRX cycle, and may also include a length of a non-reception time within the cycle. For convenience of description, the sidestream DRX cycle may also be abbreviated as a DRX cycle (DRX cycle), or simply as a cycle. The first parameter may also include a SLDRX duration timer (DRX-onduration timer), a SL DRX deactivation timer, a SL DRX hybrid automatic repeat request (hybrid automatic repeat request, HARQ) Round Trip Time (RTT) timer, or a SL DRX retransmission timer, a SL DRX cycle start offset. The configuration of the timer includes configuration such as the length of the timer, and the like, without limitation. The SL DRX duration timer is a period started in a DRX cycle, and is used to indicate whether the terminal is in an active time. And at the activation time, the terminal monitors PSCCH and receives and/or transmits data. The terminal is at the activation time after the timer is started. The timer value may be a positive integer such as 1ms or 1000 ms. The SL DRX inactivity timer is used to indicate whether the terminal is active or not, and is turned on when the terminal monitors a PSCCH. And the terminal is in the activation time, monitors the PSCCH, and receives and/or transmits data. The timer may take a value of a non-negative integer such as 0ms, 1ms, or 100 ms. The SL DRX hybrid automatic repeat request round trip time timer is the maximum duration until one SL retransmission is received, and is used to indicate whether the terminal is active or not. When the timer is active, the terminal is not active, i.e. the terminal will not listen to the PSCCH. The timer may be a non-negative integer number of orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols or number of slots. Typically, a SL DRX hybrid automatic repeat request round trip timer will be started after it expires. Optionally, the terminal starts the SL DRX hybrid automatic repeat request round trip time timer of the corresponding HARQ process at the first symbol after sending the end symbol of the PSSCH. When the SL HARQ feedback is disabled, i.e., the configuration period of the PSFCH feedback resource is 0, a SL DRX hybrid automatic repeat request round trip time timer is started after the SL DRX hybrid automatic repeat request round trip time timer is disabled. When the SL HARQ feedback is enabled, that is, when the configuration period of the PSFCH feedback resource is 1, 2 or 4, assuming that the HARQ feedback is enabled is indicated in the SCI of the scheduling PSSCH, after the terminal sends the ACK in the PSFCH, the SL DRX retransmission timer of the corresponding process is stopped. Assuming that HARQ feedback is disabled in SCI of the scheduling PSSCH, a SL DRX hybrid automatic repeat request round trip time timer is disabled and then a SL DRX retransmission timer is started.

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

Alternatively, the SL DRX retransmission timer value may be determined at a busy ratio (channel occupy ratio, CBR) per channel per priority. For example, the SL DRX retransmission timer corresponding to the data with the higher 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 intervals of different lengths of the SL DRX retransmission timer. Thus, the time for saving electricity of the terminal is increased, and the congestion condition of the channel can be better relieved.

Alternatively, the value of the SL DRX deactivation timer may be determined per channel CBR per priority. For example, the length of the SL DRX deactivation timer corresponding to the data with the higher priority is longer. Optionally, different priority intervals correspond to intervals of different SL DRX inactivity 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 intervals of different lengths of the SL DRX deactivation timer. Thus, the time for saving electricity of the terminal is increased, and the congestion condition of the channel can be better relieved.

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 the resource pool as granularity. That is, with the resource pools as granularity, each resource pool is configured with one or more sets of DRX parameters, and the 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 correspondence with the first resource pool, or the first configuration information is information of a resource pool level (per resource pool). It will be understood that the terminals operating on the first resource pool are configured with the first configuration information, or the first information is common information configured on one resource pool, and the terminals configured with this 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. I.e. the first configuration information is information that the network device is configured 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 performs side uplink communication according to the first configuration information. In fig. 5, an example is illustrated in which the first terminal performs side-link communication with the second terminal.

The first terminal discontinuously receives the side uplink message according to the first configuration information. Alternatively, the first parameter includes a period, denoted as a first period, and the unit of value of the first period may be milliseconds (ms), for example, 1ms, 2ms, or the like. One first period includes a first reception time and a first non-reception time.

The first terminal may receive the side-link message during a first reception time in one period and stop receiving the side-link message during a first non-reception time in one period when performing the side-link 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 side uplink 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 side uplink message. For example, the first terminal transmits a side uplink message in a first reception time in one period according to the first configuration information. For another example, the first terminal transmits the side uplink message on the randomly selected resource in a first non-reception time in one period according to the first configuration information. That is, the terminal acquires resources in a randomly selected manner in a preconfigured or configured resource pool or resource set for transmitting side-link information. Since the first terminal cannot monitor PSCCH of other terminals in the first non-reception time and cannot select resources by a sensing (sending) manner, but the manner of randomly selecting resources does not need to monitor PSCCH of other terminals, the first terminal can randomly select resources in the first non-reception time and send a side uplink message on the randomly selected resources.

In the embodiment of the present invention, since the first configuration information is with the granularity of the resource pool, the DRX parameters configured by the terminals operating on one resource pool are the same, that is, the receiving time and the non-receiving time in one period are aligned, so that the terminals operating in one resource pool can perform the side-link communication in the same receiving time, thereby avoiding the problem that the two terminals cannot communicate due to no intersection of the receiving times, improving the quality of the side-link communication, implementing the application of the DRX technology of the side-link communication, and reducing the power consumption of the terminals. In addition, the DRX parameters are configured through the network equipment, the DRX parameters are not required 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 present 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. If the first terminal obtains the first configuration information from the network device, the first terminal may obtain the first configuration information through higher layer signaling. The higher layer signaling carries the first configuration information, or the first configuration information is configured by the higher layer signaling. The higher layer signaling may be any one of a radio resource control (radio resource control, RRC) message, a medium access layer signaling, a medium access layer control element (medium access control control element, MAC CE), a system information block (system information block, SIB), or a master information block (master information block, MIB).

In this case, when the first terminal obtains the information for configuring the resource pool, the first terminal may obtain the first configuration information from 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 acquires 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 the DRX, where 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 of DRX, respectively.

Alternatively, the first configuration information may be information configured 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 the serving cell as granularity, or the first configuration information is configuration information on each first serving cell, or the first configuration information has a corresponding relation 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 configuration information with granularity of carriers, or the first configuration information is carrier level (per carrier) information, or the first configuration information has a correspondence with the first carriers, or the first configuration information is configuration information on each first carrier.

Optionally, the first configuration information may also be configured for each partial bandwidth part (BWP), i.e. the configuration of the first configuration information is at a BWP granularity, and each terminal configured to send and/or receive data on the BWP receives the first configuration information.

In practical applications, one resource pool may not only correspond to one DRX parameter, for example, the first configuration information is also 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.

When 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 the first terminal will use to perform side-link communication.

Optionally, the first terminal obtains indication information, which is denoted as first indication information, where the first indication information is used to indicate which parameter is used by the first terminal to perform the side-link communication, that is, indicate whether the first terminal uses the first parameter or the second parameter to perform the side-link 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 timers, cycle lengths and/or slot offsets of the DRX cycle are configured separately.

The first terminal may determine, according to the first indication information, a parameter indicated by the first indication information to perform side-link communication.

Wherein the first indication information may be from the network device or from another terminal. If the first indication information is from other terminals, the first indication information may be an 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 PC5 RRC, MAC or MAC CE. Wherein PC5 is an interface or reference point between terminals, and PC5 RRC refers to terminal-to-terminal RRC configuration.

The first terminal may also autonomously decide which parameters to employ for the side-link communication, i.e. the first terminal determines the DRX parameters to use itself. If the opposite terminal device of the side uplink communication is the second terminal, that is, the first terminal sends data information to the second terminal, the first terminal may notify the second terminal of the autonomously determined parameter, so that the two terminals of the side uplink communication can align the DRX parameter. For example, the first terminal may transmit second indication information to the second terminal, the second indication information being used to indicate according to which parameter the first terminal performs the side-link communication. The second terminal receives the 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 side-link communication with the first terminal according to the parameter indicated by the second indication information. Optionally, the second terminal may also instruct the first terminal about the parameters used by the second terminal according to the service characteristics of the second terminal, and negotiate with the first terminal to determine the parameters used by the side uplink communication finally. The second indication information may be SCI. The second indication information may be indicated by a field in the SCI or may be indicated by a reserved bit in the SCI. The second indication information may also be PC5 RRC, MAC or MAC CE.

The first terminal may use the first indication information or the autonomous decision parameter in combination or may use the first indication information or the autonomous decision parameter independently.

In summary, with respect to the transmitting end and the receiving end, the transmitting end may indicate the DRX parameter employed by itself to the receiving end, or the transmitting end may also indicate the DRX parameter employed by the receiving end to the receiving end. The parameters adopted by the sending end indication can be selected autonomously or determined according to the indication information. In this way, suitable parameters or parameter values can be selected according to the service type or service characteristics 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 with the resource pool as granularity. Taking the DRX parameter (i.e., the first parameter) 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 periods. 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 a plurality of values, the terminal selects which value to perform the side-link communication, and some alternatives are proposed in the embodiments of the present application. 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 indication information, denoted as third indication information, where the third indication information is used to indicate which value the first terminal uses for performing side-link communication, i.e. indicates that the first terminal uses the first value or one of the at least one second values for performing side-link communication.

The first terminal may select, according to the third indication information, a parameter value indicated by the third indication information to perform side-link communication.

Wherein the third indication information may be from the network device or from another terminal. If the third indication information is from the other terminal, the third indication information may be SCI. May be indicated by a field in the SCI or may be a reserved bit in the SCI. Wherein the use of SCI for indication 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 information may also be PC5 RRC, MAC or MAC CE. For another example, the third instruction information may be from the network device, and may be downlink control information DCI, or may be any one of RRC, MAC CE, SIB, and MIB. Wherein DCI is used to indicate that flexibility of DRX configuration is guaranteed.

The first terminal may also autonomously decide which value to take for side-link communication. If the peer end device of the side-link communication is the second terminal, the first terminal may notify the second terminal of the autonomously decided value to enable the two terminals of the side-link communication to align the value of the DRX parameter. For example, the first terminal may send fourth indication information to the second terminal, the fourth indication information being used to indicate according to which parameter value the first terminal performs the side-link communication. The second terminal can thus configure and communicate with the side-link according to the DRX parameter value used by the first terminal. The fourth indication information may be an 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 information may also be PC5 RRC, MAC or MAC CE.

The first terminal may use the third indication information or autonomously determine the parameter value in combination or may use the parameter value independently.

In summary, with respect to the transmitting end and the receiving end, the transmitting end may indicate the parameter value adopted by itself to the receiving end, and the transmitting end may also indicate the parameter value that should be adopted by the receiving end to the receiving end. The parameter value adopted by the sending end indication can be selected autonomously or determined according to the indication information. In this way, suitable parameters or parameter values can be selected according to the service type or service characteristics of the user.

The case where the first configuration information includes a plurality of parameters or the first parameter includes a plurality of values will be described below by way of example.

The first parameter is illustrated as a lateral DRX cycle, and for convenience of description, the lower lateral DRX cycle is briefly described as a cycle. The first configuration information includes a plurality of periods, such as 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 either case, the instruction information is used to instruct any one of the periods 1 to 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, periods 1-4 require 2 bits to indicate, period 1 is identified by 01, period 2 is identified by 10, period 3 is identified by 11, and period 4 is identified by 00. If the reserved bit in the SCI for indicating the period is 2 bits, the 2 bits are 01, and are used for indicating the period 1, indicating that the DRX period selected by the first terminal is the period 1, or indicating that the DRX period needed to be used by the second terminal is the period 1. If the field or reserved bit in the SCI indicating the DRX cycle is empty, cycle 1 is the cycle configuration parameter or cycle configuration parameter value used by default.

Alternatively, a cycle may be implicitly associated by a priority field in the SCI. For example, assume that the priorities are 1, 2, 3, 4, 5, 6, 7, 8 from high to low, and the lengths of the periods 1 to 4 are 1, 2, 3, and 4 from long to short, respectively. Then 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 SCI indicates priority 1, the corresponding cycle is cycle 1.

Alternatively, SCI may also be used to indicate activation or deactivation (enabled or disabled) of DRX. The terminal may indicate whether DRX is activated by itself using SCI or whether DRX is activated by the opposite terminal. In one case, the first terminal indicates whether or not to activate DRX itself using SCI. In another case, the first terminal indicates whether the second terminal activates DRX using SCI.

In one possible implementation, the first configuration information includes a plurality of sidestream DRX cycles, e.g., cycle 1, cycle 2, cycle 3.SCI is used to indicate cycle 1, cycle 2, cycle 3 and whether DRX is activated or deactivated. 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	Meaning of fields or reserved bits
		00	Cycle 1
01	Cycle 2
		10	Cycle 3
11	Activating or deactivating DRX configuration

If a terminal performs side-link communication with different terminals, the terminal may receive multiple indication information, where the multiple indication information may indicate different parameters or different indicated parameter values. In this case, the terminal may perform the side-link communication according to the configuration of the plurality of parameters or the plurality of values, respectively, when the plurality of parameters or the plurality of values are indicated. I.e. selecting a union of configuration results according to a plurality of parameters or a plurality of values, for side-link communication.

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

For example, as shown in fig. 7, the PUE performs side-link communication including reception and/or transmission of side-link data for a duration of l1+l2.

In practical application, the first terminal may be configured with a plurality of resource pools, and then the first terminal may receive a plurality of configuration information, where each configuration information corresponds to each resource pool, that is, each configuration information is granularity of the resource pool. Then the two different configuration information correspond to two different resource pools, the DRX parameters of which may be different. Thus, how the terminal selects the DRX parameters, the present application gives some possible implementations.

The first terminal is assumed to further acquire second configuration information, where the second configuration information is used to indicate a third parameter of the first terminal for DRX, and the second configuration information corresponds to the second resource pool, i.e. 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. I.e. the second configuration information is configured for each resource pool, and the terminals configured with the same resource pool acquire the same third parameters.

In this way, the first terminal acquires the first configuration information and the second configuration information, and obtains the first parameter and the third parameter for DRX altogether. The first parameter and the third parameter are different. The terminal may engage in side-link communications in a combination of any one or more of the following.

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 side uplink message within a common time L1 of the first reception time and the second reception time, and the first terminal may also transmit the side uplink message.

The first terminal receives the side uplink message in the first resource pool and stops receiving the side uplink message in the second resource pool within a common time L2 of the first reception time and the second non-reception time. It may be understood that the first terminal may send 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 side-link communication in the first resource pool and the third terminal and the first terminal perform side-link communication in the second resource pool, it can be understood that the first terminal can receive the side-link message of the second terminal but stop receiving the side-link message of the third terminal during a common time of the first reception time and the second non-reception time.

Alternatively, the first terminal may also receive a side uplink message within a common time L2 of the first reception time and the second non-reception time, including receiving the side uplink message of the first resource pool and receiving the second resource pool.

Alternatively, the first terminal may not receive the side uplink message during the common time L2 of the first reception time and the second non-reception time, including not receiving the side uplink message of the first resource pool and not receiving the side uplink message of the second resource pool.

Similarly, the first terminal receives the side uplink message in the second resource pool and stops receiving the side uplink message in the first resource pool within a common time L3 of the first non-reception time and the second reception time.

Alternatively, the first terminal may also receive a side uplink message within a common time L3 of the first non-reception time and the second reception time, including receiving the side uplink message of the first resource pool and receiving the second resource pool.

Alternatively, the first terminal may not receive the side uplink message during the common time L3 of the first non-reception time and the second reception time, including not receiving the side uplink message of the first resource pool and not receiving the side uplink message of the second resource pool.

The reception side uplink message is stopped within a common time L4 of the first non-reception time and the second non-reception time. The sending side uplink message may also be stopped or the resources may be determined using a randomly selected resource on which the side uplink message is sent.

The above modes can be independent or combined. 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 the above. The indication information may be in the form of RRC signaling, MAC CE, SIB, MIB, or the like.

The common time is the intersection of two times.

In the method described in the embodiment of the present application, the first parameter is a parameter of the first terminal for DRX, the first parameter is introduced by taking a DRX cycle as an example, and the first parameter may also be any one of the following parameters: SL DRX duration timer (DRX-onduration timer), SL DRX deactivation timer, SL DRX HARQ RTT timer, or SL DRX retransmission timer, SL DRX cycle start offset. Other parameters may be configured and used with reference to the description of the DRX cycle.

The first terminal may perform side uplink communication according to the DRX configuration information after receiving the DRX configuration information, and discontinuously receive the side uplink message. In another manner, the first terminal may acquire 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 disabling. The active DRX may be described as an enabled DRX and the inactive DRX may be described as a disabled DRX. For example, the first terminal acquires fifth indication information for instructing the first terminal to activate or deactivate 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, e.g., the first terminal receives the fifth indication information of the second terminal, and 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 examples in various application scenarios in this application merely represent some possible implementations, for better understanding and explanation of the method of this application. One skilled in the art can take some evolutionary examples of the side-link communication methods 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 point of view of the terminal. In order to implement the functions in the method provided in 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 plus a software module. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

As shown in fig. 9, based on the same technical concept, the 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 may be an apparatus in a terminal or a network device, or may be an apparatus that can be used in a matching manner with a terminal or a network device. In one design, the communication device 900 may include modules corresponding to each other in a manner of executing the methods/operations/steps/actions executed by the terminal in the above method embodiments, where the modules may be implemented by using hardware circuits, software, or a combination of hardware circuits and software. In one design, the communication device 900 may include a processing module 901 and a communication module 902. The processing module 901 is configured to invoke the communication module 902 to perform a function of receiving and/or transmitting.

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 to configure DRX parameters used by the first terminal in side uplink communications. For example, the first configuration information is used for indicating a first parameter of the first terminal for DRX, the first configuration information uses a resource pool as granularity, and the first configuration information corresponds to the first resource pool.

The communication module 902 is configured to perform side-link communication according to the first configuration information.

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

When the communication 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 in side uplink communications. For example, the first configuration information is used for indicating a first parameter of the first terminal for DRX, the first configuration information uses a resource pool as granularity, and the first configuration information corresponds to the first resource pool.

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

The division of the modules in the embodiments of the present application is schematically only one logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.

Fig. 10 shows a communication apparatus 1000 provided in an embodiment of the present application, which is configured to implement functions of a terminal or a network device in the above method. The communication device may be a terminal or a network device, or may be a device in a terminal or a network device, or may be a device that can be used in cooperation with a terminal or a network device. The communication device 1000 may be a system-on-chip. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices. The communication apparatus 1000 includes at least one processor 1020 configured to implement the functions of a terminal or a network device in the method provided in the embodiments of the present application. The communication device 1000 may also include a communication 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, the communication interface 1010 is used for devices in the communication device 1000 to communicate with other apparatuses.

Illustratively, when the communications apparatus 1000 is configured to perform operations performed by a terminal:

the processor 1020 is configured to obtain, 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 in side uplink 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 granularity, and the first configuration information corresponds to the first resource pool; the processor 1020 is further configured to perform side-link communications 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;

and 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 side uplink communication. For example, the first configuration information is used for indicating a first parameter of the first terminal for DRX, the first configuration information uses a resource pool as 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 in the above-described method embodiment, which are not described herein in detail.

The communications apparatus 1000 can also include at least one memory 1030 for storing program instructions and/or data. Memory 1030 is coupled to processor 1020. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be in electrical, mechanical, or other forms 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 between the communication interface 1010, the processor 1020, and the memory 1030 is not limited in this embodiment. 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, where the bus is indicated by a thick line in fig. 10, and the connection manner between other components is merely illustrative and not limited thereto. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 10, but not only one bus or one type of bus.

When the communication device 900 and the communication device 1000 are specifically chips or chip systems, the 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 output or the reception of the communication module 902 and the communication interface 1010 may be 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. The 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 embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution.

In the embodiment of the present application, the memory 1030 may be a nonvolatile memory, such as a hard disk (HDD) or a Solid State Drive (SSD), or may be a volatile memory (volatile memory), 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 implementing a memory 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, the embodiment of the 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 embodiment of the method. In one possible design, the chip is connected to a memory or the chip comprises a memory for holding the necessary program instructions and data of the communication device.

The present application provides a computer readable storage medium storing a computer program comprising instructions for performing the above-described method embodiments.

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.

It will be appreciated by those skilled in the art that 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 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. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to 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 and the equivalents thereof, the present application is intended to encompass such modifications and variations.

Claims

1. A side-link communication method applied to a first terminal, comprising:

Acquiring 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;

performing side uplink communication according to the first configuration information;

the first parameter comprises configuration of a side uplink SL Discontinuous Reception (DRX) hybrid automatic repeat request (HARQ) round trip time timer;

performing side-link communication according to the first configuration information, including:

starting an SL DRX HARQ round trip time timer according to the first symbol configured after the ending symbol of the PSSCH of the physical layer side shared channel is sent;

and starting a SL DRX retransmission timer after the SL DRX HARQ round trip time timer is invalid.

2. The method of claim 1, wherein the starting the SL DRX retransmission timer after the SL DRX HARQ round trip time timer expires comprises:

and when SL HARQ feedback is disabled, starting the SL DRX retransmission timer after the SL DRX HARQ round trip time timer is invalid.

3. The method of claim 1, wherein the method further comprises:

when SL HARQ feedback is enabled, the SL DRX retransmission timer is stopped after an acknowledgement character ACK is sent in the physical side uplink feedback channel PSFCH.

4. A method as claimed in claim 1 or 3, wherein said first parameter comprises a first period, one of said first periods comprising a first time of receipt and a first time of non-receipt;

receiving a side uplink message at the first reception time;

and stopping receiving the side uplink message at the first non-receiving time.

5. The method of claim 4, wherein the performing side-link communication according to the first configuration information further comprises:

at the first non-reception time, a resource is randomly selected to transmit a side-link message.

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

the method further comprises the steps of:

acquiring first indication information; the first indication information is used for indicating the first terminal to perform side-link communication according to the first parameter or the second parameter.

7. The method according to any of claims 1-6, wherein the first configuration information is further used to indicate at least one third parameter of the first terminal for DRX;

The method further comprises the steps of:

transmitting second indication information to a second terminal; the second indication information is used for indicating the first terminal to perform side-link communication according to the first parameter or the third parameter.

8. The method according to any one of claims 1 to 5, wherein the first parameter comprises a first value and at least one second value;

the method further comprises the steps of:

and acquiring third indication information, wherein the third indication information is used for indicating the first terminal to perform side uplink communication according to the first value or the second value.

9. The method according to any one of claims 1-5, 8, wherein the first parameter comprises a first value and at least one second value;

the method further comprises the steps of:

and sending fourth indication information to the second terminal, wherein the fourth indication information is used for indicating the first terminal to perform side-link communication according to the first value or the second value.

10. The method of claim 4, wherein the method further comprises:

acquiring second configuration information, wherein the second configuration information is used for indicating a fourth parameter of the first terminal for DRX, 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 receive time and a second non-receive time;

performing side-link communication according to the first configuration information, comprising:

performing side uplink communication according to the first configuration information and the second configuration information; wherein the first terminal receives a side uplink message within a common time of the first reception time and the second reception time.

11. The method of claim 10, wherein the first terminal receives a side uplink message in the first resource pool and stops receiving a side uplink message in the second resource pool during a common time of the first receive time and the second non-receive time.

12. The method of claim 10, wherein the first terminal stops receiving and/or stopping sending side uplink messages within a common time of the first reception time and the second non-reception time.

13. The method of claim 10, wherein the first terminal receives and/or transmits a side uplink message within a common time of the first receive time and the second non-receive time.

14. The method of any one of claims 1 to 13, further comprising:

and acquiring 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.

15. The method of any of claims 1-14, wherein the first configuration information comprises any of: a radio resource control RRC message, medium access control MAC signaling, medium access layer control element MAC CE, system information block SIB or master information block MIB.

16. A method of side-link communication for a network device, comprising:

generating first configuration information;

the first configuration information is sent to a first terminal, 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 first parameter comprises configuration of a side uplink SL discontinuous reception DRX hybrid automatic repeat request HARQ round trip time timer, wherein the configuration is used for starting the SL DRX HARQ round trip time timer at a first symbol after an ending symbol of a physical layer side line shared channel PSSCH is sent; and the configuration is used for starting an SL DRX retransmission timer after the SL DRX HARQ round trip time timer is invalid.

17. The method of claim 16, wherein the configuration is to turn on the SL DRX retransmission timer after the SL DRX HARQ round trip time timer expires when SL HARQ feedback is disabled.

18. The method of claim 16, wherein the first configuration information is further for indicating at least one second parameter for DRX for the first terminal; the first parameter includes a first period and the second parameter includes a second period.

19. The method of claim 18, wherein the first terminal is instructed to use the first parameter or the second parameter for side-link communication.

20. The method of claim 16, wherein the first parameter comprises a first value and at least one second value; the first value includes a first period and the second value includes a second period.

21. The method of claim 20, wherein the first terminal is instructed to use the first value or the second value for side-link communication.

22. The method of any one of claims 16-21, further comprising:

and sending second configuration information to the first terminal, wherein the second configuration information is used for indicating a fourth parameter of DRX used 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.

23. The method according to any of claims 16-22, wherein the first configuration information is further used to instruct the first terminal to activate or deactivate DRX.

24. The method of any one of claims 16 to 22, further comprising:

and sending fifth indication information to the first terminal, 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.

25. A communication device, comprising:

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

a communication module, configured to perform side uplink communication according to the first configuration information;

the communication module is specifically used for:

The processing module is specifically configured to:

26. The apparatus of claim 25, wherein the processing module is specifically configured to:

27. The apparatus of claim 25, wherein the processing module is further to:

when SL HARQ feedback is enabled, the communication module stops the SL DRX retransmission timer after sending an acknowledgement character ACK in the physical side uplink feedback channel PSFCH.

28. The apparatus of claim 25 or 27, wherein the first parameter comprises a first period, one of the first periods comprising a first receive time and a first non-receive time;

the communication module is specifically used for:

receiving a side uplink message at the first reception time;

and stopping receiving the side uplink message at the first non-receiving time.

29. The apparatus of claim 28, wherein the communication module is further for:

30. The apparatus according to any of claims 25-29, wherein the first configuration information is further for indicating at least one second parameter for DRX for the first terminal;

the communication module is further configured to:

31. The apparatus according to any of claims 25-30, wherein the first configuration information is further for indicating at least one third parameter of the communication module for DRX;

the communication module is further configured to:

transmitting second indication information; the second indication information is used for indicating the first terminal to perform side-link communication according to the first parameter or the third parameter.

32. The apparatus of any one of claims 25-29, wherein the first parameter comprises a first value and at least one second value;

the communication module is further configured to:

33. The apparatus of any one of claims 25-29, 32, wherein the first parameter comprises a first value and at least one second value;

the communication module is further configured to:

34. The apparatus of claim 28, wherein the communication module is further for:

the communication module is specifically used for:

performing side uplink communication according to the first configuration information and the second configuration information; wherein the communication module receives a side uplink message within a common time of the first reception time and the second reception time.

35. The apparatus of claim 34, wherein the communication module is configured to receive a side uplink message in the first resource pool and to cease receiving a side uplink message in the second resource pool during a common time of the first receive time and the second non-receive time.

36. The apparatus of claim 34, wherein the communication module is configured to cease receiving and/or ceasing to transmit a side uplink message during a common time of the first receive time and the second non-receive time.

37. The apparatus of claim 34, wherein the communication module is configured to receive and/or transmit a side uplink message during a common time of the first receive time and the second non-receive time.

38. The apparatus of any one of claims 25-37, wherein the communication module is further configured to:

39. The apparatus of any one of claims 25-38, wherein the first configuration information comprises any one of: a radio resource control RRC message, medium access control MAC signaling, medium access layer control element MACCE, system information block SIB or master information block MIB.

40. A communication device, characterized in that,

the processing module is used for generating first configuration information;

The communication module is used for sending the first configuration information, 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;

41. The apparatus of claim 40, wherein the configuration is to turn on the SL DRX retransmission timer after the SL DRX HARQ round trip time timer expires when SL HARQ feedback is disabled.

42. The apparatus of claim 40, wherein the first configuration information is further for indicating at least one second parameter for DRX for the first terminal; the first parameter includes a first period and the second parameter includes a second period.

43. The apparatus of claim 42, wherein the communication module is further for: the first terminal is instructed to use the first parameter or the second parameter for side-uplink communication.

44. The apparatus of claim 40, wherein the first parameter comprises a first value and at least one second value; the first value includes a first period and the second value includes a second period.

45. The apparatus of claim 44, wherein the communication module is further for: the first terminal is instructed to use the first value or the second value for side-link communication.

46. The apparatus of any one of claims 40 to 45, wherein the communication module is further configured to:

47. The apparatus of any of claims 40-46, wherein the first configuration information is further to instruct the first terminal to activate or deactivate DRX.

48. The apparatus of any one of claims 40 to 46, wherein the communication module is further configured to:

49. A communication device, comprising: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1-15.

50. A communication device, comprising: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 16-24.

51. A communication system comprising a communication device according to any one of claims 25 to 39 and a communication device according to any one of claims 40 to 48.

52. A computer readable storage medium having computer readable instructions stored therein, which when run on a communication device, perform the method of any one of claims 1 to 15 or the method of any one of claims 16 to 24.