A communication method, apparatus and system

Abstract

The embodiment of the application provides a communication method, device and system, the method comprises the following steps: receiving a first message sent by a first terminal device, wherein the first message comprises a path identifier; determining a sidelink resource allocated for the first terminal device according to at least one of a target transmission path associated with the path identifier and a discontinuous reception (DRX) configuration, wherein the target transmission path is a transmission path between the first terminal device and a second terminal device. By using the embodiment of the application, the utilization rate of transmission resources can be improved, and the transmission efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, and in particular to a communication method, device and system. BACKGROUND

[0002] With the rapid development of new radio (NR) communication system, its performance in low latency, high reliability, spectrum efficient utilization and other aspects can effectively solve the problems of spectrum resource shortage, frequency band congestion and safety of vehicle communication. Vehicle to everything (V2X) is considered as one of the most potential and market demand clear fields in the Internet of Things system. Vehicle to everything is to provide vehicle information through sensors and vehicle terminals installed on vehicles, and to realize communication between vehicles, people and roadside infrastructure through various communication technologies.

[0003] In the scenario of communication between user equipment (UE) and user equipment, for example, in V2X communication, the user equipment can send a resource request to the base station. After the base station receives the resource request sent by the UE, the sidelink (SL) resource, such as uplink authorization (SL grant), is scheduled. However, the SL grant scheduled by the network device for the UE may fall within the sleep period of discontinuous reception (DRX), resulting in low utilization of transmission resources and affecting transmission efficiency. SUMMARY

[0004] The present application provides a communication method, device and system. The base station can determine which DRX active time the allocated SL resource falls in, thereby improving the utilization of transmission resources and improving the transmission efficiency by transmitting through the allocated SL resource.

[0005] In a first aspect, an embodiment of the present application provides a communication method, which can be applied to a network device or a component in the network device, such as a chip, a processor, etc. The method comprises: receiving a first message sent by a first terminal device, wherein the first message comprises a path identifier; and determining sidelink resources allocated to the first terminal device according to at least one of a target transmission path associated with the path identifier and a discontinuous reception (DRX) configuration. The target transmission path is a transmission path between the first terminal device and a second terminal device. The first terminal device reports the path identifier, so that the base station can determine which DRX active time the allocated SL resources fall in, thereby improving the utilization rate of the SL resources, and ensuring the transmission of the first terminal device to the second terminal device through the allocated SL resources, and improving the transmission efficiency.

[0006] In a possible design, the path identifier comprises at least one of: a target identifier corresponding to the transmission path, a source identifier corresponding to the transmission path, and an identifier of the sidelink.

[0007] In another possible design, the at least one of the target transmission path and the DRX configuration associated with the path identifier can be understood as: the path identifier corresponds to the target transmission path, and / or the path identifier corresponds to the DRX configuration.

[0008] In another possible design, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0009] In another possible design, in a scenario supporting retransmission, after UE1 sends a scheduling request (for example, a BSR or an SR) to the base station, the base station allocates SL resources to the UE. After UE1 receives the SL resources, according to the LCP rule, UE1 selects one or more transmission paths between UE1 and UE2, multiplexes data on the transmission path onto the SL resources, and sends the data to UE2 through the SL resources. In this process, if the data transmission fails and UE1 needs to retransmit data to UE2 but has no SL resources, UE1 can send a first message to the base station, wherein the first message is used to request SL resources for retransmission.

[0010] In another possible design, the first message can comprise a hybrid automatic repeat request (HARQ) feedback, for example, a negative acknowledgement (NACK) message. Alternatively, the first message can also be carried in the HARQ feedback, that is, the HARQ feedback carries the path identifier in the first message.

[0011] In another possible design, in a scenario supporting initial transmission, if UE1 needs to send data to UE2 but has no SL resources, UE1 can send a first message to the base station, wherein the first message is used to request sidelink resources for initial transmission.

[0012] In a second aspect, an embodiment of the present application provides a communication method, which can be applied to a first terminal device or a component in the first terminal device, such as a chip, a processor, etc. The method comprises the following steps: sending a first message to a network device, the first message comprising a path identifier, the path identifier being associated with at least one of a target transmission path and a discontinuous reception (DRX) configuration, the first message being used to request a sidelink (SL) resource, the target transmission path being a transmission path between the first terminal device and a second terminal device; and receiving the SL resource sent by the network device. The first terminal device reports the path identifier, so that the base station can determine which transmission path the allocated SL resource falls within the active time of the DRX of, thereby improving the utilization rate of the SL resource, and the transmission through the allocated SL resource ensures the successful transmission of the first terminal device to the second terminal device, and improves the transmission efficiency.

[0013] In another possible design, the path identifier comprises at least one of the following: a target identifier corresponding to the transmission path, a source identifier corresponding to the transmission path, and an identifier of the sidelink.

[0014] In another possible design, the path identifier corresponds to the target transmission path, and / or the path identifier corresponds to the DRX configuration.

[0015] In another possible design, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0016] In another possible design, in a scenario supporting retransmission, the UE 1 can send an SR to the base station, and the base station allocates an SL resource to the UE. After the UE 1 receives the SL resource, the UE 1 selects one or more transmission paths between the UE 1 and the UE 2 according to the LCP rule, multiplexes data on the transmission path onto the SL resource, and sends the data to the UE 2 through the SL resource. In this process, if the data fails to be sent, the UE 1 needs to retransmit the data to the UE 2 but has no SL resource, and the UE 1 can send a first message to the base station, the first message being used to request an SL resource for retransmission.

[0017] In another possible design, the first message further comprises a hybrid automatic repeat request (HARQ) feedback, such as a negative acknowledgement (NACK) message.

[0018] In another possible design, the first message is sent on a control channel, for example, the first terminal device sends the first message on a PUCCH resource. Alternatively, the first terminal device sends the first message on a PUSCH resource in a piggyback manner.

[0019] In another possible design, in the initial transmission scenario, if UE1 needs to send data to UE2, UE1 can send a first message to the base station, where the first message is used to request a sidelink resource for initial transmission.

[0020] In a third aspect, an embodiment of the present application provides a communication method, which can be applied to a network device or a component in the network device, such as a chip, a processor, etc. The method includes: determining, by the network device, a correspondence between a hybrid automatic repeat request (HARQ) identifier and a path identifier; receiving first request information sent by a first terminal device, where the first request information is used to request a sidelink resource; and allocating, according to the correspondence between the HARQ identifier and the path identifier, the sidelink resource for the first terminal device. Through the correspondence between the HARQ identifier and the path identifier, the base station can determine in which DRX active time of which transmission path the allocated SL resource falls, thereby improving the utilization rate of the SL resource, and ensuring the transmission of the first terminal device to the second terminal device through the allocated SL resource, and improving the transmission efficiency.

[0021] In a possible design, the first information includes the correspondence between the HARQ identifier and the path identifier. The network device determines the correspondence between the HARQ identifier and the path identifier by receiving the first information.

[0022] In another possible design, the first information is used to indicate the correspondence between the HARQ identifier and the path identifier, or to indicate the correspondence between the sidelink resource and the path identifier, or to indicate the correspondence between the uplink resource and the path identifier.

[0023] In another possible design, second information is sent to the first terminal device, where the second information includes the correspondence between the HARQ identifier and the path identifier. The second terminal device determines the correspondence between the HARQ identifier and the path identifier by receiving the second information.

[0024] In another possible design, path information sent by the first terminal device is received, where the path information includes the path identifier; and the correspondence between the HARQ identifier and the path identifier is established. The correspondence between the HARQ identifier and the path identifier is established by receiving the path identifier.

[0025] In another possible design, the first request information is sent by the first terminal device through UE assistance information (UAI), a medium access control control element (MAC CE), or uplink control information (UCI).

[0026] In another possible design, the first request information is used to request a sidelink resource for retransmission. For example, UE1 determines that data needs to be retransmitted on transmission path 2, and thus UE1 sends the first request information to the base station through a PUCCH resource, where the PUCCH resource corresponds to a HARQ identification. After the base station receives the first request information, the base station allocates a SL resource for UE1 according to the correspondence between the HARQ identification and the path identification, so that the SL resource can fall within the active time of the DRX of the transmission path 2, or so that the SL resource matches the DRX configuration.

[0027] In another possible design, the path identification includes at least one of the following: a target identification corresponding to the transmission path, a source identification corresponding to the transmission path, and an identification of the sidelink.

[0028] In a fourth aspect, an embodiment of the present application provides a communication method, which can be applied to a first terminal device or a component in the first terminal device, for example, a chip, a processor, etc. The method includes: determining, by the first terminal device, a correspondence between a hybrid automatic repeat request (HARQ) identification and a path identification; and sending, by the first terminal device, first request information to a network device, where the first request information is used to request a sidelink (SL) resource, and the correspondence between the HARQ identification and the path identification is used to determine at least one of a target transmission path corresponding to the SL resource and a DRX configuration, and the target transmission path is a transmission path between the first terminal device and a second terminal device. Through the correspondence between the HARQ identification and the path identification, the first terminal device can determine in which DRX active time of which transmission path the allocated SL resource falls, thereby improving the utilization rate of the SL resource, and ensuring successful transmission from the first terminal device to the second terminal device through the allocated SL resource, and improving the transmission efficiency.

[0029] In a possible design, the SL resource is received from the network device. The first terminal device sends data to the second terminal device through the received SL resource, and ensures successful data transmission.

[0030] In another possible design, the first information is sent to the network device, where the first information includes the correspondence between the HARQ identification and the path identification. The first information is sent to the network device, so that the network device determines the correspondence between the HARQ identification and the path identification.

[0031] In another possible design, the second information is received from the network device, where the second information includes the correspondence between the HARQ identification and the path identification. The second information is received, so that the correspondence between the HARQ identification and the path identification is determined.

[0032] In another possible design, a negative acknowledgement (NACK) message is received from the second terminal device, and first request information is sent to the network device according to the NACK message. The NACK message is used to determine that data transmission fails, and thus triggers the request for the SL resource for retransmission, so as to ensure successful data transmission.

[0033] In another possible design, the first request information is sent to the network device through UE assistance information (UAI), a medium access control control element (MAC CE), or uplink control information (UCI).

[0034] In another possible design, the first request information is used to request the sidelink resource for retransmission. For example, the UE 1 determines that data needs to be retransmitted on the transmission path 2, and thus the UE 1 sends the first request information to the base station through a PUCCH resource, where the PUCCH resource corresponds to a HARQ identifier. After the base station receives the first request information, the base station allocates the SL resource for the UE 1 according to the correspondence between the HARQ identifier and the path identifier, so that the SL resource can fall within the active time of the DRX of the transmission path 2.

[0035] In another possible design, the path identifier includes at least one of the following: a target identifier corresponding to the transmission path, a source identifier corresponding to the transmission path, or an identifier of the sidelink.

[0036] In another possible design, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0037] In a fifth aspect, an embodiment of the present application provides a communication method, which can be applied to a network device or a component in the network device, for example, a chip, a processor, etc. The method includes the following steps: receiving second request information sent by a first terminal device through a first resource associated with a logical channel, the logical channel corresponding to a target transmission path, and the target transmission path being a transmission path between the first terminal device and a second terminal device; sending a second resource to the first terminal device; and receiving first indication information sent by the first terminal device through the second resource, the first indication information being used to request a sidelink resource. The second request information is sent to the base station through the first resource associated with the logical channel, so that the base station can determine that the allocated SL resource falls within the active time of the DRX of the transmission path corresponding to the logical channel, thereby improving the utilization rate of the SL resource, and ensuring successful transmission from the first terminal device to the second terminal device through the allocated SL resource, and improving the transmission efficiency.

[0038] In another possible design, the first indication information is included in a buffer status report (BSR), and the first indication information is used to indicate that the BSR includes a resource request for the sidelink resource. The BSR is used to indicate the request for the SL resource, so that signaling resources can be saved.

[0039] In another possible design, the first indication information is contained in a medium access control control element (MAC CE). The SL resource is indicated by the newly defined MAC CE, so that the terminal device can successfully transmit data to the UE 2 through the allocated SL resource, and the data transmission efficiency is improved.

[0040] In another possible design, the first indication information is contained in a SL BSR MAC CE, and the first indication information is used to request a sidelink resource for transmitting a channel state information (CSI) MAC CE. The SL resource is indicated by reusing the SL BSR MAC CE, so that signaling resources can be saved.

[0041] In another possible design, the sidelink resource corresponds to a target transmission path, and the sidelink resource is used for transmission on the target transmission path.

[0042] In another possible design, the first resource is a scheduling request (SR) resource.

[0043] In another possible design, the second resource is an uplink resource.

[0044] In another possible design, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0045] In a sixth aspect, an embodiment of the present application provides a communication method, which can be applied to a first terminal device or a component in the first terminal device, for example, a chip, a processor, etc. The method includes the following steps: transmitting second request information to a network device through a first resource associated with a logical channel, the logical channel corresponding to a target transmission path, and the target transmission path being a transmission path between the first terminal device and a second terminal device; receiving a second resource sent by the network device; and transmitting first indication information to the network device through the second resource, the first indication information being used to request a sidelink resource. The second request information is transmitted to the base station through the first resource associated with the logical channel, so that the base station can determine that the allocated SL resource falls within the active time of the DRX of the transmission path corresponding to the logical channel, thereby improving the utilization rate of the SL resource, and transmission is performed through the allocated SL resource, so that the transmission of the first terminal device to the second terminal device is successfully guaranteed, and the transmission efficiency is improved.

[0046] In another possible design, the first indication information is contained in a buffer status report (BSR), and the first indication information is used to indicate that the sidelink resource is contained in a resource request in the BSR. The SL resource is indicated by the BSR, so that signaling resources can be saved.

[0047] In another possible design, the first indication information is contained in a medium access control control element (MAC CE). The SL resource is indicated by the newly defined MAC CE, so that the terminal device can successfully transmit data to the UE 2 through the allocated SL resource, and the data transmission efficiency is improved.

[0048] In another possible design, the first indication information is contained in a SL BSR MAC CE, and the first indication information is used to request a sidelink resource for transmitting a sidelink channel state report (CSI) MAC CE. The SL resource is indicated by reusing the SL BSR MAC CE, so that signaling resources can be saved.

[0049] In another possible design, the sidelink resource corresponds to a target transmission path, and the sidelink resource is used for transmission on the target transmission path.

[0050] In another possible design, the first resource is a scheduling request (SR) resource.

[0051] In another possible design, the second resource is an uplink resource.

[0052] In another possible design, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0053] In a seventh aspect, an embodiment of the present application provides a first communication apparatus, which is configured to implement the method and functions performed by the network device in the first aspect, the third aspect, and the fifth aspect, and is implemented by hardware / software, and the hardware / software includes a module corresponding to the above functions.

[0054] In an eighth aspect, an embodiment of the present application provides a second communication apparatus, which is configured to implement the method and functions performed by the first terminal device in the second aspect, the fourth aspect, and the sixth aspect, and is implemented by hardware / software, and the hardware / software includes a module corresponding to the above functions.

[0055] In a ninth aspect, an embodiment of the present application provides a first communication apparatus, which is applied to a network device, and can be the network device or a chip in the network device. The first communication apparatus includes a processor, a memory, and a communication bus. The communication bus is used to realize connection communication between the processor and the memory. The processor executes a program stored in the memory to implement the steps in the first aspect, the third aspect, and the fifth aspect.

[0056] In a tenth aspect, an embodiment of the present application provides a second communication device applied to a first terminal device, the second communication device can be the first terminal device or a chip in the first terminal device, and the second communication device includes a processor, a memory and a communication bus, wherein the communication bus is configured to realize connection communication between the processor and the memory, and the processor executes a program stored in the memory to realize the steps in the second aspect, the fourth aspect and the sixth aspect.

[0057] In an eleventh aspect, an embodiment of the present application provides a chip including a processor, which is configured to call and run instructions stored in a memory, so that a communication device installed with the chip executes the method in any of the aspects.

[0058] In a twelfth aspect, an embodiment of the present application provides another chip including an input interface, an output interface, a processor and optionally a memory, the input interface, the output interface, the processor and the memory are connected through internal connection paths, and the processor is configured to execute code in the memory, and when the code is executed, the processor is configured to execute the method in any of the aspects.

[0059] In a thirteenth aspect, the present application provides a computer readable storage medium, and the computer readable storage medium stores instructions, when the instructions are executed on a computer, the computer is caused to execute the method in the aspects.

[0060] In a fourteenth aspect, the present application provides a computer program product including instructions, when the instructions are executed on a computer, the computer is caused to execute the method in the aspects.

[0061] In a fifteenth aspect, an embodiment of the present application provides a communication system, the communication system includes at least one network device and at least one terminal device, the network device is configured to execute the steps in the first aspect, the third aspect and the fifth aspect, and the terminal device is configured to execute the steps in the second aspect, the fourth aspect and the sixth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings needed to be used in the embodiments of the present application or the background art will be described below.

[0063] Figure 1 FIG. 1 is a schematic diagram of an architecture of a communication system provided by an embodiment of the present application;

[0064] Figure 2 FIG. 2 is a schematic diagram of a DRX cycle;

[0065] Figure 3 FIG. 3 is a schematic diagram of resource scheduling;

[0066] Figure 4 is a flowchart of a communication method provided by an embodiment of the present application;

[0067] Figure 5 is a flowchart of another communication method provided by an embodiment of the present application;

[0068] Figure 6 is a flowchart of another communication method provided by an embodiment of the present application;

[0069] Figure 7 is a structural diagram of a first communication device provided by an embodiment of the present application;

[0070] Figure 8 is a structural diagram of a second communication device provided by an embodiment of the present application;

[0071] Figure 9 is a structural diagram of a network device provided by an embodiment of the present application;

[0072] Figure 10 is a structural diagram of a terminal device provided by an embodiment of the present application;

[0073] Figure 11 is a diagram of an entry field provided by an embodiment of the present application. DETAILED DESCRIPTION

[0074] The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0075] As shown in Figure 1 Figure 1 ​Fig. 1 is a schematic diagram of an architecture of a communication system 100 according to an embodiment of the present application. The communication system 100 can include a network device 110 and terminal devices 101-106. It should be understood that more or fewer network devices or terminal devices can be included in the communication system 100 to which the methods according to embodiments of the present application can be applied. The network device or the terminal device can be hardware, or software functionally divided, or a combination of the two. The network device and the terminal device can communicate through other devices or network elements. In the communication system 100, the network device 110 can send downlink data to the terminal devices 101-106. Of course, the terminal devices 101-106 can also send uplink data to the network device 110. The terminal devices 101-106 can be a UE, a vehicle-mounted communication device, a cellular phone, a smart phone, a portable computer, a handheld communication device, a handheld computing device, a satellite radio, a global positioning system, a personal digital assistant (PDA), and / or any other suitable device for communicating over the wireless communication system 100, and the like. The communication system 100 can employ a public land mobile network (PLMN), a vehicle to everything (V2X) network, a device-to-device (D2D) network, a machine to machine (M2M) network, an internet of things (IoT), or other networks. In addition, the terminal devices 104-106 can also form a communication system. In the communication system, the terminal device 105 can send downlink data to the terminal devices 104 or 106. The methods according to embodiments of the present application can be applied to the communication system 100 shown in Fig. 1. Figure 1

[0076] In the embodiments of the present application, the UE is taken as the terminal device, and the base station is taken as the network device to explain the technical solutions of the present application, which will not be described hereinafter.

[0077] The following describes the technologies related to the present application.

[0078] (1) NR V2X:

[0079] ​In NR V2X, the physical uplink shared channel (PUSCH) and the physical sidelink shared channel (PSSCH) cannot be transmitted simultaneously, that is, when the SL resource and the uplink (UL) resource overlap in the time domain, only one of them can be selected for communication.

[0080] In V2X communication, UEs can communicate with each other in a sidelink manner. In the communication mode based on the sidelink technology, resource allocation on the sidelink includes two modes:

[0081] The first mode (mode 1): base station scheduling resource allocation, also known as scheduling mode. That is, in V2X communication, if the connected UE needs to transmit data on the sidelink, the UE needs to first send a buffer status report (BSR) to the base station to inform the base station of the amount of data currently needing to be transmitted on the sidelink. After the base station receives the BSR, it can allocate sidelink resources (such as SL grant) according to the data amount. In this process, if the UE currently has no uplink resource (such as UL grant) to send the BSR, the UE can trigger a scheduling request (SR). If the UE has configured SR resources, the UE can send an SR to the base station through the SR resources. After the base station receives the SR, it allocates UL grant for the UE to send the BSR according to the scheduling result. After the UE receives the UL grant, it sends the BSR to the base station through the UL grant.

[0082] Among them, R16 defines two types of SR for SL: the first type is the SR triggered by SL BSR, that is, the SL BSR is sent through the SR request UL grant. The second type is the SR triggered by SL channel state information (CSI), that is, the SL grant is sent through the SR request SL grant. A dedicated SR configuration is used to send the SR, which is applicable to all PC5 unicast connections of the UE, that is, all transmission paths (also known as pairs) are shared. If the UE triggers a SL CSI media access control (MAC) control element (CE), but has no SL grant, it can trigger an SR to directly request a SL grant.

[0083] The second mode (mode 2): UE autonomous resource selection, also known as autonomous mode. When the UE is conducting sidelink communication, if it needs to transmit data on the sidelink, the UE can select resources from a resource pool configured or pre-configured by the base station to transmit data on the sidelink. The resource pool can be configured by the base station through system information, configured by the base station through dedicated signaling after receiving a communication request from the user equipment on the sidelink, or pre-configured.

[0084] When a UE selects one of the two modes mentioned above for V2X communication, the base station can configure the UE to execute the other mode. In Long Term Evolution (LTE) V2X, a UE can only be configured to execute one of the two modes. For example, if a UE was previously operating in scheduled mode, and due to the need for sidelink communication and pending data transmission, a Single Layer Backlink Response (SL BSR) is triggered, but no uplink resources are reported for the BSR, therefore the SR is in a suspended state. Assuming all suspended SRs are triggered by SL BSRs, if a UE operating in scheduled mode is reconfigured to operate in autonomous mode, all suspended SRs are canceled. However, in NR V2X, a UE can be configured to support both scheduled and autonomous modes simultaneously.

[0085] (2) Discontinuous reception (DRX):

[0086] In wireless communication systems, to conserve UE power consumption while ensuring effective data transmission, a Uu DRX mechanism is introduced to control the UE's PDCCH listening behavior. Without the DRX mechanism, the UE would continuously listen to the PDCCH, receiving information from the serving cell. However, in reality, the UE is not constantly exchanging information with the base station, nor is it constantly performing upload or download services, and voice data is not continuously transmitted during calls. If the UE continuously listens to the PDCCH when there is no data exchange between the UE and the base station, it would obviously waste power. Therefore, a power-saving mechanism for the UE, namely DRX, is designed to ensure effective data transmission.

[0087] When configuring DRX, the UE can periodically enter a sleep state for a certain period of time. While in sleep mode, the UE does not need to listen to the PDCCH. When the UE needs to listen to the PDCCH, it switches from sleep mode to wake-up mode, thus saving power. Although this affects data transmission latency, this latency does not impact the user experience. Considering that UE power consumption is more important, implementing DRX is more meaningful. Figure 2 As shown,Figure 2 is a schematic diagram of a DRX cycle. The DRX cycle is defined as follows:

[0088] On-duration: the time period after the UE is woken up to wait for receiving PDCCH. If the UE successfully decodes PDCCH, the UE will stay in the woken up state and start an inactivity timer.

[0089] Inactivity-timer: the time period for the UE to wait for successfully decoding PDCCH again since the last time the UE successfully decoded PDCCH. If the inactivity timer expires, the UE can go back to sleep. After successfully decoding PDCCH scheduling a new transmission, the UE restarts the inactivity timer. If it is a retransmission, the inactivity timer is not restarted.

[0090] Opportunity for DRX: this is the DRX sleep time, i.e., the time period when the UE goes to sleep and does not listen to PDCCH, which serves the purpose of power saving. The longer the sleep time for DRX, the lower the power consumption of the UE. However, the latency of the corresponding service transmission will increase.

[0091] DRX Cycle: the repetition period of on-duration. A DRX cycle consists of on-duration plus the following active time and Opportunity for DRX.

[0092] Currently, in the R17 sidelink study, it is proposed to introduce SL DRX. Similar to the above Uu DRX, SL DRX is used to control the behavior of the UE listening to the physical sidelink control channel (PSCCH) carrying sidelink control information (SCI). That is, the UE is woken up at a certain time period to listen to the SCI sent by other UEs, and if the UE goes to sleep, it cannot receive the SCI sent by other UEs.

[0093] For R17 SL, SL DRX can be maintained per pair between a transmitting UE (TX UE) and a receiving UE (RX UE), and the TX UE should send SCI or transport block (TB) within the period when the RX UE DRX is in the wake-up state to ensure that the RX UE can receive. Among them, per pair corresponds to one of the multiple transmission paths between the TX UE and the RX UE.

[0094] (3) SL CSI:

[0095] In order to support the link adaptation function of unicast transmission, the NR PC5 link supports the function of CSI measurement and reporting. The SL CSI measurement and reporting function is similar to the CSI measurement and reporting framework on the Uu link. Among them, only the single unicast scenario supports SL CSI reporting. The CSI reporting mode includes:

[0096] First, SL CSI is reported in the form of MAC CE, and a new logical channel identifier (LCID) is defined for the MAC CE. Among them, the length of the SL CSI MAC CE is 1 byte, including 1 bit of rank indicator (RI) and 4 bits of channel quality indicator (CQI). In the priority list of SL logical channel prioritization (LCP), the priority of the SL CSI MAC CE is a fixed value (for example, 1), and the value is between PC5-radio resource control (RRC) / PC5-S and sidelink data (SL data). In addition, the SL CSI MAC CE can be multiplexed with data with the same unicast connection (for example, with the same source and destination L2 ID).

[0097] Second, SL CSI triggering and cancellation: the indication provided by the lower layer triggers the SL CSI MAC CE. If the UE has sent SCI, the CSI reporting is cancelled. And the UE reports the CSI through one shot, that is, it does not support periodic CSI reporting mechanism and other mechanisms. If the upper limit of the delay requirement for triggering CSI has been reached before sending CSI, the UE cancels the triggering of CSI reporting.

[0098] Third, SL CSI reporting needs to consider packet delay budget (PDB), i.e., to ensure that SL CSI MAC CE is sent under a certain delay requirement.

[0099] Among them, the resources of the CSI report include:

[0100] First, for the UE using mode 1, if there is no available SL resource, the SL CSI MAC CE triggers SR, requests SL resource through SR, and can be mapped to at most one SR configuration.

[0101] Second, for the UE using mode 2, if there is no available SL resource, resource reselection is triggered. If the SL resource does not meet the delay requirement of the CSI report, resource reselection is triggered. How to determine "does not meet the delay requirement of the CSI report" depends on the UE implementation, i.e., not to adopt the timer-based method.

[0102] Third, the base station associates an SR configuration identification (SR-config ID) to the SL CSI of all unicast links of the UE. If the CSI report of any destination (DST) triggers SR, the UE should send SR using the SR configuration associated with this SL CSI report.

[0103] The TX UE provides the SL measurement result to the RX UE through PC5-RRC signaling. The RX UE sends the SL-reference signal receiving power (RSRP) measurement result to the TX UE through PC5-RRC signaling, without the need to send the SL-RSRP measurement result to the base station. Among them, the TX UE and the RX UE support event-triggered SL-RSRP measurement results and periodic SL-RSRP measurement results. The events triggering the RSRP report at least include event A1 (SL-RSRP exceeds threshold) or event A2 (SL-RSRP is lower than threshold). On the RX UE side, the TX UE triggered SL-RSRP reporting mechanism is not supported.

[0104] For the TX UE using mode 1, resource request information such as SR, buffer status report (BSR), and uplink assistant information (UAI) needs to be sent to the base station, which is used to request SL resources. The base station receives the resource request information sent by the TX UE, schedules SL resources, and does not limit the time domain position of the SL resources.

[0105] Since the base station does not know the DRX configuration of the RX UE, the SL resource scheduled for the TX UE can fall in the non-activation period of the DRX of the RX UE. As shown in Figure 3 , due to the random scheduling of the SL resource by the base station, part of the SL resource (such as SL grant 1) for new transmission can fall in the wake-up time of the DRX of the path 1 (also referred to as pair 1) of the TX UE (i.e. in the gray interval corresponding to the path 1), and part of the SL resource (such as SL grant 2) does not fall in the wake-up time of any DRX maintained by the TX UE. If the TX UE transmits data on the SL resource (such as SL grant 2), since the RX UEs corresponding to the paths 1 to 3 (also referred to as pairs 1 to 3) are all in the sleep state, the RX UE cannot receive the data transmitted on the SL grant 2, affecting the transmission efficiency.

[0106] To solve the technical problem, the base station can be assisted to reasonably allocate the SL resource. The TX UE can report the DRX configuration of all RX UEs to the base station. The TX UE selects a pair through the LCP rule, and the DRX corresponding to the pair is in the activation state, and then transmits data through the received SL grant.

[0107] As shown in Figure 3 , the base station allocates the SL grant to the UE, the TX UE determines that the SL resource is located in the activation time of the DRX corresponding to the path 1 and the path 3, and after the TX UE receives the SL resource, the TX UE selects to multiplex the data of the path 1 to the SL grant according to the LCP rule. If the TX UE needs to perform retransmission subsequently, the TX UE requests the SL resource for retransmission from the base station. Since the base station does not know which path the SL resource for retransmission is scheduled for, if the base station randomly schedules, the SL resource does not fall in the activation time of the DRX of the path 1, so that the RX UE cannot receive the data transmitted on the SL grant 2, affecting the transmission efficiency. To solve the above technical problem, the embodiments of the present application provide the following solutions.

[0108] As shown in Figure 4 , Figure 4 is a flowchart of a communication method provided by an embodiment of the present application. The method includes but is not limited to the following steps:

[0109] S401, UE1 sends a first message to the base station, and the first message includes a path identifier.

[0110] Optionally, the first message is uplink control information (UCI), such as SR. The first message can also be other messages.

[0111] The path identifier can be used to determine the transmission path, that is, the base station or the UE 1 can determine one or more transmission paths between the UE 1 and the UE 2 according to the path identifier. As an example, several path identifiers are listed in the embodiments of the present application, including a target identifier (for example, DST index or DST ID) corresponding to the transmission path, a source identifier corresponding to the transmission path, and an identifier of the sidelink. The target identifier corresponding to the transmission path can also be understood as the target identifier associated with the transmission path, and the source identifier corresponding to the transmission path can also be understood as the source identifier associated with the transmission path. However, other identifiers that can be used to determine the transmission path also fall within the protection scope of the embodiments of the present application.

[0112] The transmission path between the UE 1 and the UE 2 includes multiple transmission paths, and each transmission path corresponds to one pair or one DST. The transmission path is a sidelink between the UE 1 and the UE 2 for transmitting data. For example, as shown in FIG. 2, the transmission path between the UE 1 (the sending end UE) and the UE 2 (the receiving end UE) includes three transmission paths, and each transmission path corresponds to one pair. The sending end UE can select any one of the transmission paths to send data to the receiving end UE according to the LCP rule, and each path is configured with DRX. Figure 3

[0113] Optionally, the first message can include hybrid automatic repeat request (HARQ) feedback, for example, the HARQ feedback can be a negative acknowledgement (NACK) message. Alternatively, the first message can also be carried in the HARQ feedback, that is, the HARQ feedback carries the path identifier.

[0114] In the scenario supporting retransmission, after the UE 1 sends a scheduling request (for example, a BSR or an SR) to the base station, the base station allocates SL resources (for example, an SL grant) to the UE. After the UE 1 receives the SL resources, the UE 1 selects one or more transmission paths between the UE 1 and the UE 2 according to the LCP rule, multiplexes data on the transmission path onto the SL resources, and sends data to the UE 2 through the SL resources. In this process, if the data transmission fails and the UE 1 needs to retransmit data to the UE 2 but has no SL resources, the UE 1 can send a first message to the base station, and the first message is used to request SL resources for retransmission. In this case, the UE 1 can feed back a NACK message to the base station, and the NACK message carries the path identifier, so that the base station can determine which transmission path the allocated SL resources fall within according to the path identifier. If the UE 1 does not need to request SL resources for retransmission, the UE 1 can send a determination ACK message to the base station, and the ACK message can not carry the path identifier.

[0115] ​Optionally, the UE 1 can receive the NACK message of the UE 2, and the UE 1 determines, according to the NACK message, that the data transmission to the UE 2 fails and needs to be retransmitted, and thus triggers the UE 1 to send the first message to the base station.

[0116] Optionally, in the retransmission scenario described above, when scheduling the SL resource, the base station configures a channel resource corresponding to the SL resource, for example, the channel resource can include a PSSCH resource, a physical sidelink feedback channel (PSFCH) resource, and a physical uplink control channel (PUCCH) resource. When the UE 1 requests the SL resource for retransmission from the base station, the first message can be sent to the base station through the previously configured uplink control channel. The uplink control channel can be a PUCCH.

[0117] In the scenario supporting initial transmission, if the UE 1 needs to send data (for example, SL CSI) to the UE 2, the UE 1 can send the first message to the base station at this time, that is, the first message is triggered by the CSI to be sent to the base station. The first message is used to request the sidelink resource for initial transmission. The path identifier can be included in the first message.

[0118] S402, the base station determines the sidelink resource allocated to the UE 1 according to at least one of a target transmission path associated with the path identifier and a discontinuous reception (DRX) configuration, the target transmission path being a transmission path between the first terminal device and the second terminal device.

[0119] The sidelink resource can be a SL grant.

[0120] It should be noted that the at least one of the target transmission path associated with the path identifier and the discontinuous reception (DRX) configuration can be understood as: the path identifier corresponds to the target transmission path, and / or the path identifier corresponds to the DRX configuration. The target transmission path can be a transmission path between the UE 1 and the UE 2, or multiple transmission paths between the UE 1 and the UE 2. Specifically, the following cases can be included:

[0121] Optionally, after the base station receives the first message, it is determined that the path identifier corresponds to the target transmission path, and thus the SL resource is allocated to the UE 1 for the target transmission path.

[0122] Optionally, the base station can receive the DRX configuration of UE2 sent by UE1, and the DRX configuration can include the DRX corresponding to each transmission path, that is, one path identification corresponds to one DRX. Then, after receiving the first message, the SL resource is scheduled to fall within the active time of the DRX of UE2 according to the DRX configuration corresponding to the path identification. Alternatively, the base station can also pre-configure the DRX of each transmission path between UE1 and UE2, and then schedule the SL resource to fall within the active time of the DRX of UE2 according to the DRX of each transmission path.

[0123] Optionally, after receiving the first message, the base station determines the target transmission path corresponding to the path identification and the DRX configuration. Then, for the target transmission path, the base station allocates the SL resource to UE1 according to the DRX configuration. For example, the SL resource can be allocated according to the size of the active time of the DRX, so that the SL resource falls within the active time of the DRX on the target transmission path.

[0124] For example, there are three transmission paths (for example, transmission path 1, transmission path 2 and transmission path 3) between UE1 and UE2. UE1 determines that the data needs to be retransmitted on the transmission path 2 or the data needs to be initially transmitted on the transmission path 2, and therefore UE1 sends an SR to the base station, and the SR includes the path identification of the transmission path 2. After receiving the SR, the base station allocates the SL resource to UE1 according to the DRX configuration of the transmission path 2, so that the SL resource can fall within the active time of the DRX on the transmission path 2.

[0125] S403, the base station sends the sidelink resource to UE1.

[0126] Optionally, after receiving the sidelink resource sent by the base station, UE1 sends data to UE2 through the sidelink resource. The data can be initial transmission data or retransmission data.

[0127] In the embodiment of the present application, UE1 reports the path identification, and the base station can determine which transmission path the allocated SL resource falls within the active time of the DRX of, thereby improving the utilization rate of the SL resource, and ensuring the successful transmission of the first terminal device to the second terminal device through the allocated SL resource, thereby improving the transmission efficiency.

[0128] As shown in FIG. 1, Figure 5 Figure 5 is a flow diagram of a communication method provided by an embodiment of the present application, which includes but is not limited to the following steps:

[0129] S501, the base station determines the correspondence between the HARQ identification and the path identification.

[0130] ​The path identifier can be used to determine the transmission path, that is, the base station or UE1 can determine one or more transmission paths between UE1 and UE2 according to the path identifier. As an example, several path identifiers are listed in the embodiments of the present application, including a target identifier corresponding to the transmission path (for example, DST index or DST ID), a source identifier corresponding to the transmission path, and an identifier of the sidelink. The target identifier corresponding to the transmission path can also be understood as the target identifier associated with the transmission path, and the source identifier corresponding to the transmission path can also be understood as the source identifier associated with the transmission path. However, other identifiers that can be used to determine the transmission path also fall within the protection scope of the embodiments of the present application.

[0131] The correspondence between the HARQ identifier and the path identifier can be in the form of a list or a function, or other forms.

[0132] Specifically, the base station determines the correspondence between the HARQ identifier and the path identifier in the following several optional ways:

[0133] The first optional way: UE1 sends an SR to the base station, which can be used to request SL resources for initial transmission. After the base station receives the SR sent by UE1, the base station allocates SL resources to UE1 and sends radio resource control (RRC) information or downlink control information (DCI) to UE1. The RRC information or DCI can include SL resources, or the HARQ identifier corresponding to the SL resources. After UE1 receives the SL resources, according to the LCP rule, one or more transmission paths between UE1 and UE2 are selected, and the correspondence between the HARQ identifier and the path identifier of the selected transmission path is established. Then UE1 sends first information to the base station. The first information includes the correspondence between the HARQ identifier and the path identifier.

[0134] Optionally, the first information is used to indicate the correspondence between the HARQ identifier and the path identifier, or to indicate the correspondence between the sidelink resource and the path identifier, or to indicate the correspondence between the uplink resource and the path identifier, and the like.

[0135] Optionally, UE1 can send the first information to the base station through UE assistant information (UAI), MAC CE or UCI, and the like.

[0136] In a second optional manner, the UE 1 sends an SR to the base station, the SR can be used to request the SL resource for initial transmission, after the base station receives the SR sent by the UE 1, the base station allocates the SL resource for the UE 1, and establishes the correspondence between the HARQ identifier corresponding to the SL resource and the path identifier. Optionally, before the UE 1 sends the SR to the base station, the UE 1 can first send path information to the base station, the path information includes the path identifier, after the base station receives the path information, the correspondence between the HARQ identifier corresponding to the SL resource and the path identifier is established.

[0137] In a third optional manner, the base station can pre-configure the correspondence between the HARQ identifier and the path identifier. The UE 1 can also pre-configure the correspondence between the HARQ identifier and the path identifier.

[0138] Optionally, the base station can send a second message to the UE 1, the second message includes the correspondence between the HARQ identifier and the path identifier. The second message can be an RRC message.

[0139] The HARQ identifier can be a HARQ ID or a HARQ index.

[0140] It should be noted that the HARQ identifier can also be replaced by a HARQ process identifier, a HARQ process ID, a sidelink process identifier, or a sidelink process ID. For example, the base station can also determine the correspondence between the HARQ process identifier and the path identifier.

[0141] S502, the UE 2 sends first request information to the base station, the first request information is used to request a sidelink resource.

[0142] Optionally, the first request information is used to request a sidelink resource for retransmission, and can also be used to request a sidelink resource for initial transmission. The sidelink resource can be a SL grant.

[0143] The first request information can be an SR.

[0144] Optionally, when the base station schedules the SL resource, the base station can configure the HARQ identifier corresponding to the SL resource, or can configure the channel resource corresponding to the SL resource, that is, the HARQ identifier corresponds to the channel resource. For example, the channel resource can include a PSSCH resource, a PSFCH resource, and a PUCCH resource. When the UE 1 requests the SL resource for retransmission from the base station, the UE 1 can send an SR to the base station through the PUCCH resource.

[0145] S503, the base station allocates the sidelink resource for the first terminal device according to the correspondence between the HARQ identifier and the path identifier.

[0146] Optionally, after the base station receives the first request information sent by UE1 through the PUCCH resource, the base station determines the HARQ identifier corresponding to the PUCCH resource according to the PUCCH resource used to carry the first request information, and then determines the path identifier according to the correspondence between the HARQ identifier and the path identifier, and then allocates the sidelink resource for UE1 according to at least one of the target transmission path associated with the path identifier and the DRX configuration.

[0147] Further, the base station can allocate the SL resource for UE1 according to the DRX configuration for the target transmission path. For example, the SL resource can be allocated according to the size of the active time of the DRX, so that the allocated SL resource falls within the active time of the DRX on the target transmission path.

[0148] It should be noted that the at least one of the target transmission path associated with the path identifier and the discontinuous reception DRX configuration can be understood as: the path identifier corresponds to the target transmission path, and / or the path identifier corresponds to the DRX configuration. The target transmission path can be a transmission path between UE1 and UE2, or multiple transmission paths between UE1 and UE2.

[0149] Optionally, the base station can receive the DRX configuration of UE2 sent by UE1, and the DRX configuration can include the DRX corresponding to each transmission path, that is, one path identifier corresponds to one DRX. Then, the SL resource is scheduled to fall within the active time of the DRX of UE2 according to the DRX configuration. Alternatively, the base station can also pre-configure the DRX of each transmission path between UE1 and UE2, and then schedule the SL resource to fall within the active time of the DRX of UE2 according to the DRX of each transmission path.

[0150] For example, there are three transmission paths (for example, transmission path 1, transmission path 2 and transmission path 3) between UE1 and UE2. UE1 determines that the data needs to be retransmitted on the transmission path 2, so UE1 sends SR to the base station through the PUCCH resource, wherein the PUCCH resource corresponds to the HARQ identifier. After the base station receives the SR, the base station allocates the SL resource for UE1 according to the correspondence between the HARQ identifier and the path identifier, so that the SL resource can fall within the active time of the DRX of the transmission path 2, or so that the SL resource matches the DRX configuration.

[0151] S504, UE1 receives the sidelink resource sent by the base station.

[0152] Optionally, after UE1 receives the SL resource sent by the base station, UE1 sends data to UE2 through the SL resource. The data can be initial transmission data or retransmission data.

[0153] Optionally, when UE1 determines the correspondence between HARQ identifier and path identifier, if UE1 receives SL resource sent by base station, it can determine the HARQ identifier corresponding to SL resource, then determine the path identifier according to the correspondence between HARQ identifier and path identifier, and then multiplex the data on the transmission path corresponding to the path identifier onto SL resource, and send data to UE2 through SL resource.

[0154] In this embodiment of the application, by using the correspondence between HARQ identifiers and path identifiers, the base station or the first terminal device can determine which transmission path's DRX activation time the allocated SL resources fall into, thereby improving the utilization rate of SL resources. Furthermore, by using the allocated SL resources for transmission, the first terminal device can successfully transmit to the second terminal device, thus improving transmission efficiency.

[0155] like Figure 6 As shown, Figure 6 This is a flowchart illustrating a communication method provided in an embodiment of this application. The method includes, but is not limited to, the following steps:

[0156] S601, UE1 sends a second request message to the base station through the first resource associated with the logical channel (LCH), the logical channel corresponding to the target transmission path, the target transmission path being the transmission path between the first terminal device and the second terminal device.

[0157] Optionally, UE1 and UE2 may include multiple transmission paths, with each transmission path corresponding to one pair or one DST. The transmission path is a side link used for data transmission between UE1 and UE2. The target transmission path can be one transmission path between UE1 and UE2, or it can be multiple transmission paths.

[0158] The first resource can be an SR resource.

[0159] The second request information can be an SR.

[0160] Optionally, when UE1 needs to send SL CSI to UE2 but has no SL resources, UE1 does not use the SR resources of the side link to directly request SL resources from the base station. Instead, it uses the SR resources of the uplink associated with the logical channel to send SR to the base station. After receiving the SR, the base station can allocate second resources for UE1 and determine the target transmission path corresponding to the allocated SL resources based on the logical channel.

[0161] Optionally, the target transmission path can correspond to one logical channel or multiple logical channels.

[0162] The first resource associated with the logical channel can also be understood as a first resource bound by the logical channel, or a first resource corresponding to the logical channel.

[0163] It should be noted that the logical channel is defined for different types of data transmission services provided by the MAC layer. The logical channel can include a control channel and a service channel. The control channel is used to transmit control plane information, and the service channel is used to transmit user plane information.

[0164] S602, the base station sends the second resource to the UE1.

[0165] The second resource can be an uplink resource.

[0166] S603, the UE1 sends first indication information to the base station through the second resource, and the first indication information is used to request a sidelink resource.

[0167] The sidelink resource corresponds to the target transmission path, and the sidelink resource is used for data transmission on the target transmission path.

[0168] Optionally, after receiving the first indication information, the base station can allocate SL resources to the UE1 according to the DRX configuration for the target transmission path. For example, the SL resources can be allocated according to the size of the active time of the DRX, so that the allocated SL resources fall within the active time of the DRX on the target transmission path.

[0169] Optionally, the base station can receive the DRX configuration of the UE2 sent by the UE1, and the DRX configuration can include a DRX corresponding to each transmission path, that is, one path identifier corresponds to one DRX. Then, according to the DRX configuration, the SL resources are scheduled to fall within the active time of the DRX of the UE2. Alternatively, the base station can also pre-configure the DRX of each transmission path between the UE1 and the UE2, and then according to the DRX of each transmission path, the SL resources are scheduled to fall within the active time of the DRX of the UE2.

[0170] For example, there are three transmission paths (for example, transmission path 1, transmission path 2 and transmission path 3) between the UE1 and the UE2. When the UE1 determines that the CSI needs to be sent to the UE2 on the transmission path 2, the UE1 first sends the SR to the base station through the SR resource associated with the logical channel corresponding to the transmission path 2. After the base station receives the SR, the UL resource is allocated to the UE1. In this way, the UE1 can send the first indication information to the base station through the UL resource. After the base station receives the first indication information, it is determined that the UE1 requests the SL resource, so the base station allocates the SL resource to the UE1, so that the SL resource can fall within the active time of the DRX of the transmission path 2. Finally, the UE1 can send the CSI to the UE2 through the SL resource.

[0171] The UE 1 can send the first indication information in the following ways.

[0172] In a first optional way, the first indication information is included in a BSR, and the first indication information is used to indicate that the BSR includes a resource request for the sidelink resource. Further, after the UE 1 receives the uplink resource, the UE 1 can send a BSR to the base station through the uplink resource, and the BSR includes not only the amount of data on the sidelink that needs to be transmitted at present, but also the first indication information. After the base station receives the BSR, the base station can not only allocate a first SL resource to the UE 1 according to the amount of data on the sidelink that needs to be transmitted at present, so that the UE 1 sends data to the UE 2 through the first SL resource, but also allocate a second SL resource to the UE 1 according to the first indication information, so that the UE 1 sends CSI to the UE 2 through the second SL resource. The first SL resource and the second SL resource are different SL resources, and are used to send different data.

[0173] In a second optional way, the first indication information is included in a medium access control control element (MAC CE). The MAC CE can be newly defined. Further, the UE 1 sends a MAC CE to the base station, and the MAC CE includes the first indication information, which is used for the SL resource corresponding to the target transmission path.

[0174] In a third optional way, the first indication information is included in a SL BSR MAC CE, and the first indication information is used to request a SL resource for sending a SL channel state report (CSI) MAC CE. The SL BSR MAC CE is reused, that is, the SL BSR MAC CE can be used to send data, or can be used to request a sidelink resource for the SL CSI MAC CE. The following two cases are included.

[0175] When the UE does not trigger the SL BSR, or when the UE has triggered the SL BSR, and the path identifier for triggering the CSI is not included in the entry of the SL BSR, that is, the transmission path corresponding to the path identifier has no buffered data, the entry corresponding to the target transmission path is still included in the SL BSR, and a special value of one of an indication field or a buffer size (BS) field is added, for example, a bit corresponding to the value 0, to indicate that the base station requests a SL resource for sending the SL CSI MAC CE, so as to preferentially schedule the SL resource corresponding to the path identifier by the base station.

[0176] Or, when the UE has triggered the SL BSR, and the SL BSR entry contains the path identification triggering the CSI, that is, the path identification corresponding to the transmission path has data, the SL BSR MAC CE can preferentially contain the entry of the logical channel group (logical channel group, LCG) and the BS corresponding to the path identification, and arrange the LCH in descending order according to the LCH priority. Make the base station know which LCH has data, so as to preferentially schedule the SL resource corresponding to the path identification. Optionally, if the UL grant is not large enough to carry the BSR completely, the BSR can be truncated, and only the previous part of the entry is reported to the base station. The entry corresponding to the LCH with high priority is placed in front, so that the base station can be preferentially scheduled.

[0177] For example, as shown in Figure 11 , the SL BSR MAC CE can include N entries, one entry can include 2 bytes, and one entry can include a target identification or target index, a logical channel group identification, and a buffer size resource. Byte 1 (Oct1) and byte 2 (Oct2) contain destination index 1 (destination index 1) field, LCG identification 1 (LCG ID1) field and buffer size 1 (buffer size1) field.

[0178] In the embodiment of the present application, UE1 sends the second request information to the base station through the first resource associated with the logical channel, so that the base station can determine that the allocated SL resource falls within the active time of the DRX of the transmission path corresponding to the logical channel, thereby improving the utilization rate of the SL resource, and transmitting through the allocated SL resource, guaranteeing the transmission of the first terminal device to the second terminal device successfully, and improving the transmission efficiency.

[0179] It should be noted that the methods of the above various embodiments can be combined or split, and the technical solutions obtained after combination or splitting are also within the protection scope of the present application.

[0180] The above describes the method of the embodiment of the present application in detail, and the device of the embodiment of the present application is provided below.

[0181] Please refer to Figure 7 , Figure 7FIG. 1 is a schematic diagram of a structure of a first communication device according to an embodiment of the present application. The first communication device can be a network device, or a chip or processing system in the network device. The first communication device can be used to implement any method and function related to the network device in any embodiment described above. The first communication device can include a receiving module 701, a processing module 702, and a sending module 703. Optionally, the receiving module 701 and the sending module 703 can correspond to radio frequency circuitry and baseband circuitry included in the network device. Details of each module are described below.

[0182] In one embodiment,

[0183] The receiving module 701 is configured to receive a first message sent by a first terminal device, where the first message includes a path identifier.

[0184] The processing module 702 is configured to determine sidelink resources allocated to the first terminal device according to at least one of a target transmission path associated with the path identifier and a discontinuous reception (DRX) configuration.

[0185] Optionally, the path identifier includes at least one of a target identifier corresponding to the transmission path, a source identifier corresponding to the transmission path, and an identifier of the sidelink.

[0186] Optionally, the at least one of the target transmission path associated with the path identifier and the DRX configuration includes that the path identifier corresponds to the target transmission path and / or the path identifier corresponds to the DRX configuration.

[0187] Optionally, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0188] Optionally, the first message is used to request the sidelink resources for retransmission.

[0189] Optionally, the first message further includes hybrid automatic repeat request (HARQ) feedback.

[0190] Optionally, the first message is used to request the sidelink resources for initial transmission.

[0191] In another embodiment,

[0192] The processing module 702 is configured to determine a correspondence between a hybrid automatic repeat request (HARQ) identifier and a path identifier.

[0193] The receiving module 701 is configured to receive first request information sent by a first terminal device, where the first request information is used to request sidelink resources.

[0194] The processing module 702 is further configured to allocate the sidelink resource for the first terminal device according to the correspondence between the HARQ identifier and the path identifier.

[0195] Optionally, the receiving module 701 is further configured to receive first information from the first terminal device, where the first information includes the correspondence between the HARQ identifier and the path identifier.

[0196] Optionally, the sending module 703 is configured to send second information to the first terminal device, where the second information includes the correspondence between the HARQ identifier and the path identifier.

[0197] Optionally, the receiving module 701 is further configured to receive path information sent by the first terminal device, where the path information includes the path identifier; and the processing module 702 is further configured to establish the correspondence between the HARQ identifier and the path identifier.

[0198] Optionally, the receiving module 703 is further configured to receive the first request information sent by the first terminal device through UE assistance information (UAI), a medium access control control element (MAC CE), or uplink control information (UCI).

[0199] Optionally, the first request information is used to request the sidelink resource for retransmission.

[0200] Optionally, the path identifier includes at least one of the following: a target identifier corresponding to a transmission path, a source identifier corresponding to a transmission path, or an identifier of a sidelink.

[0201] In another embodiment,

[0202] The receiving module 701 is configured to receive second request information sent by a first terminal device through a first resource associated with a logical channel, where the logical channel corresponds to a target transmission path, and the target transmission path is a transmission path between the first terminal device and a second terminal device.

[0203] The sending module 703 is configured to send a second resource to the first terminal device.

[0204] The receiving module 701 is further configured to receive first indication information sent by the first terminal device through the second resource, where the first indication information is used to request a sidelink resource.

[0205] Optionally, the first indication information is included in a buffer status report (BSR), and the first indication information is used to indicate that the BSR includes a resource request for the sidelink resource.

[0206] Optionally, the first indication information is included in a medium access control control element (MAC CE).

[0207] Optionally, the first indication information is included in a SL BSR MAC CE, and the first indication information is used to request a sidelink resource for transmitting a SL channel state information report CSI MAC CE.

[0208] Optionally, the sidelink resource corresponds to the target transmission path, and the sidelink resource is used for transmission on the target transmission path.

[0209] Optionally, the first resource is a scheduling request SR resource.

[0210] Optionally, the second resource is an uplink resource.

[0211] Optionally, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0212] It should be noted that the implementation of each module can also correspond to the description of the method embodiment shown in Figures 4-6 The method and function performed by the network device in the above embodiments are executed.

[0213] Please refer to Figure 8 , Figure 8 is a structural schematic diagram of a second communication device provided by an embodiment of the present application. The second communication device can be a terminal device, or a chip or processing system in the terminal device, and can be used to implement any method and function related to the terminal device in any of the preceding embodiments. The second communication device can include a sending module 801, a receiving module 802, and a processing module 803. Optionally, the sending module 801 and the receiving module 802 can correspond to the radio frequency circuit and the baseband circuit included in the terminal device. The detailed description of each module is as follows.

[0214] In one embodiment:

[0215] The sending module 801 is configured to send a first message to a network device, wherein the first message includes a path identifier, the path identifier is associated with at least one of a target transmission path and a discontinuous reception DRX configuration, the first message is used to request a sidelink resource, and the target transmission path is a transmission path between the first terminal device and a second terminal device.

[0216] The receiving module 802 is configured to receive the sidelink resource sent by the network device.

[0217] Optionally, the path identifier includes at least one of the following: a target identifier corresponding to the transmission path, a source identifier corresponding to the transmission path, and an identifier of the sidelink.

[0218] Optionally, the path identification is associated with at least one of a target transmission path and a discontinuous reception (DRX) configuration comprises that the path identification corresponds to the target transmission path and / or the path identification corresponds to the DRX configuration.

[0219] Optionally, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0220] Optionally, the first message is used for requesting the sidelink resource for retransmission.

[0221] Optionally, the first message further comprises hybrid automatic repeat request (HARQ) feedback.

[0222] Optionally, the first message is used for requesting the sidelink resource for initial transmission.

[0223] In another embodiment,

[0224] The processing module 803 is configured to determine a correspondence between a hybrid automatic repeat request (HARQ) identification and a path identification.

[0225] The sending module 801 is configured to send first request information to the network device, the first request information being used for requesting a sidelink resource, and the correspondence between the HARQ identification and the path identification being used for determining at least one of a target transmission path and a DRX configuration corresponding to the sidelink resource, the target transmission path being a transmission path between the first terminal device and a second terminal device.

[0226] Optionally, the receiving module 802 is configured to receive the sidelink resource sent by the network device.

[0227] Optionally, the sending module 801 is further configured to send first information to the network device, the first information comprising the correspondence between the HARQ identification and the path identification.

[0228] Optionally, the receiving module 802 is further configured to receive second information sent by the network device, the second information comprising the correspondence between the HARQ identification and the path identification.

[0229] Optionally, the receiving module 802 is further configured to receive a negative acknowledgement (NACK) message sent by the second terminal device, and the sending module 801 is further configured to send the first request information to the network device according to the NACK message.

[0230] Optionally, the sending module 801 is further configured to send the first request information to the network device through UE assistance information (UAI), a medium access control control element (MAC CE) or uplink control information (UCI).

[0231] Optionally, the first request information is used for requesting the sidelink resource for retransmission.

[0232] Optionally, the path identifier comprises at least one of the following: a target identifier corresponding to the transmission path, a source identifier corresponding to the transmission path, an identifier of the sidelink.

[0233] Optionally, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0234] In another embodiment,

[0235] The sending module 801 is configured to send second request information to the network device through a first resource associated with a logical channel, the logical channel corresponding to a target transmission path, the target transmission path being a transmission path between the first terminal device and a second terminal device.

[0236] The receiving module 802 is configured to receive a second resource sent by the network device.

[0237] The sending module 801 is configured to send first indication information to the network device through the second resource, the first indication information being used for requesting a sidelink resource.

[0238] Optionally, the first indication information is included in a buffer status report (BSR), and the first indication information is used for indicating that the BSR includes a resource request of the sidelink resource.

[0239] Optionally, the first indication information is included in a medium access control control element (MAC CE).

[0240] Optionally, the first indication information is included in a SL BSR MAC CE, and the first indication information is used for requesting a sidelink resource for sending a sidelink channel state information (CSI) MAC CE.

[0241] Optionally, the sidelink resource corresponds to the target transmission path, and the sidelink resource is used for transmission on the target transmission path.

[0242] Optionally, the first resource is a scheduling request (SR) resource.

[0243] Optionally, the second resource is an uplink resource.

[0244] Optionally, the transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

[0245] It should be noted that the implementation of each module can also be referred to Figures 4-6The corresponding description of the method embodiments shown is performed. The method and function performed by the terminal device in the above embodiments are executed.

[0246] As Figure 9 shown, Figure 9 is a structural schematic diagram of a network device provided by an embodiment of the present application. The network device can include at least one processor 901, at least one communication interface 902, at least one memory 903, and at least one communication bus 904.

[0247] The processor 901 can be a central processor unit, a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in combination with the disclosure of the present application. The processor can also be a combination of computing functions, such as one or more microprocessor combinations, digital signal processor and microprocessor combinations, etc. The communication bus 904 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 9 only one thick line is used in the figure, but it does not mean that there is only one bus or only one type of bus. The communication bus 904 is used to realize the connection communication between the components. In the present application, the communication interface 902 of the device is used for signaling or data communication with other node devices. The memory 903 can include volatile memory, such as non-volatile random access memory (NVRAM), phase change RAM (PRAM), magnetoresistive RAM (MRAM), etc., and can also include non-volatile memory, such as at least one magnetic disk storage device, electrically erasable programmable read-only memory (EEPROM), flash memory device, such as NOR flash memory or NAND flash memory, semiconductor device, such as solid state disk (SSD), etc. The memory 903 can also be at least one storage device located away from the aforementioned processor 901. The memory 903 can also optionally store a set of program codes. The processor 901 can also optionally execute the program stored in the memory 903. The processor can cooperate with the memory and the communication interface to execute any method and function of the network device in the above application embodiments.

[0248] As Figure 10 shown, Figure 10 is a structural schematic diagram of a terminal device. The terminal device can include at least one processor 1001, at least one communication interface 1002, at least one memory 1003, and at least one communication bus 1004.

[0249] The processor 1001 can be various types of processors mentioned above. The communication bus 1004 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 10 only one thick line is used, but it does not mean that there is only one bus or only one type of bus. The communication bus 1004 is used to realize the connection and communication between the components. In the present embodiment, the communication interface 1002 of the device is used for signaling or data communication with other node devices. The memory 1003 can be various types of memories mentioned above. The memory 1003 can also be at least one storage device located away from the aforementioned processor 1001. The memory 1003 stores a set of program codes, and the processor 1001 executes the program in the memory 1003. The processor can cooperate with the memory and the communication interface to execute any method and function of the terminal device in the above embodiments.

[0250] The present embodiment also provides a chip system, which includes a processor for supporting a terminal device or a network device to implement the functions involved in any of the above embodiments, such as generating or processing the first information or the first message involved in the above method. In a possible design, the chip system can also include a memory, and the memory is used for the necessary program instructions and data of the terminal device or the network device. The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0251] The present embodiment also provides a processor for coupling with a memory, for executing any method and function of the terminal device or the network device involved in any of the above embodiments.

[0252] The present embodiment also provides a computer-readable storage medium, which stores instructions, and when the instructions run on a computer, the computer executes any method and function of the terminal device or the network device involved in any of the above embodiments.

[0253] The embodiments of the present application further provide a computer program product containing instructions, which, when executed on a computer, cause the computer to perform any method and function related to the terminal device or the network device in any of the above embodiments.

[0254] The embodiments of the present application further provide an apparatus for performing any method and function related to the terminal device or the network device in any of the above embodiments.

[0255] The embodiments of the present application further provide a wireless communication system, which includes at least one terminal device and at least one network device related to any of the above embodiments.

[0256] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the communication apparatus, units or modules in the apparatus described above can refer to the corresponding processes in the foregoing method embodiments, which will not be described herein.

[0257] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as DVD), or semiconductor media (such as solid state disk (SSD)) and the like.

[0258] It should be understood that the term "and / or" herein merely describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone.

[0259] It should be understood that, in the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. It should also be understood that the determination of B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0260] The "multiple" appearing in the embodiments of the present application refers to two or more.

[0261] The first, second, and the like appearing in the embodiments of the present application are only for illustrative and distinguishing purposes, and there is no order, nor does it represent a special limitation on the number of the described objects in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application.

[0262] It can be understood that, in the embodiments of the present application, the terminal device and / or the network device can perform some or all of the steps in the embodiments of the present application, and these steps or operations are only examples, and other operations or variations of various operations can also be performed in the embodiments of the present application. In addition, the various steps can be executed in different orders as presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application are to be executed.

[0263] The specific embodiments described above further illustrate the purposes, technical solutions and beneficial effects of the present application. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A communication method characterized by comprising: The method comprises: receiving a first message sent by a first terminal device, the first message comprising a path identifier; determining, according to at least one of a target transmission path corresponding to the path identifier and a discontinuous reception (DRX) configuration associated with the path identifier, a sidelink resource allocated to the first terminal device, the target transmission path being a transmission path in a plurality of transmission paths between the first terminal device and a second terminal device, each of the plurality of transmission paths corresponding to a DRX configuration.

2. The method of claim 1, wherein, The path identifier comprises at least one of a target identifier corresponding to a transmission path, a source identifier corresponding to a transmission path, and an identifier of a sidelink.

3. The method of claim 1 or 2, wherein, The at least one of the target transmission path and the DRX configuration associated with the path identifier comprises: The path identifier corresponds to the target transmission path, and / or the path identifier corresponds to the DRX configuration.

4. The method of claim 1 or 2, wherein, The transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

5. The method of claim 1 or 2, wherein, The first message is used to request the sidelink resource for retransmission.

6. The method of claim 5, wherein, The first message further comprises hybrid automatic repeat request (HARQ) feedback.

7. The method of claim 1 or 2, wherein, The first message is used to request the sidelink resource for initial transmission.

8. A communication method characterized by comprising: The method comprises: sending, to a network device, a first message comprising a path identifier, the path identifier being associated with at least one of a target transmission path and a discontinuous reception (DRX) configuration, the first message being used to request a sidelink resource, the target transmission path being a transmission path in a plurality of transmission paths between a first terminal device and a second terminal device, each of the plurality of transmission paths corresponding to a DRX configuration; receiving the sidelink resource sent by the network device.

9. The method of claim 8, wherein, The path identifier comprises at least one of a target identifier corresponding to a transmission path, a source identifier corresponding to a transmission path, and an identifier of a sidelink.

10. The method of claim 8 or 9, wherein, The at least one of the target transmission path and the DRX configuration associated with the path identifier comprises: The path identifier corresponds to the target transmission path, and / or the path identifier corresponds to the DRX configuration.

11. The method of claim 8 or 9, wherein, The transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

12. The method of claim 8 or 9, wherein, The first message is used to request the sidelink resource for retransmission.

13. The method of claim 12, wherein, The first message further comprises hybrid automatic repeat request (HARQ) feedback.

14. The method of claim 8 or 9, wherein, The first message is used to request the sidelink resource for initial transmission.

15. A method of communication, comprising: The method comprises: determining a correspondence between a hybrid automatic repeat request (HARQ) identifier and a path identifier; receiving first request information sent by a first terminal device, the first request information being used to request a sidelink resource; determining, according to the correspondence between the HARQ identifier and the path identifier, a path identifier, and according to at least one of a target transmission path corresponding to the path identifier and a discontinuous reception (DRX) configuration associated with the path identifier, allocating the sidelink resource to the first terminal device, the target transmission path being a transmission path in a plurality of transmission paths between the first terminal device and a second terminal device, each of the plurality of transmission paths corresponding to a DRX configuration.

16. The method of claim 15, wherein, The method further includes: receiving first information from the first terminal device, the first information comprising a correspondence between the HARQ identifier and the path identifier.

17. The method of claim 15, wherein, The method further includes: sending second information to the first terminal device, the second information comprising the correspondence between the HARQ identifier and the path identifier.

18. The method of claim 17, wherein, The method further includes: receiving path information sent by the first terminal device, the path information comprising the path identifier; establishing the correspondence between the HARQ identifier and the path identifier.

19. The method of any one of claims 15-18, wherein, The receiving first request information sent by the first terminal device comprises: receiving the first request information sent by the first terminal device through UE assistance information (UAI), a medium access control control element (MAC CE), or uplink control information (UCI).

20. The method of any one of claims 15-18, wherein, The first request information is used to request the sidelink resource for retransmission.

21. The method of any one of claims 15-18, wherein, The path identifier comprises at least one of: a target identifier corresponding to a transmission path, a source identifier corresponding to a transmission path, or an identifier of a sidelink.

22. A method of communication, comprising: The method comprises: determining a correspondence between a hybrid automatic repeat request (HARQ) identifier and a path identifier; sending first request information to a network device, the first request information being used to request a sidelink resource, and the correspondence between the HARQ identifier and the path identifier being used to determine at least one of a target transmission path and a discontinuous reception (DRX) configuration corresponding to the sidelink resource, the target transmission path being a transmission path in a plurality of transmission paths between a first terminal device and a second terminal device, each transmission path in the plurality of transmission paths corresponding to a DRX configuration.

23. The method of claim 22, wherein, The method further comprises: receiving the sidelink resource sent by the network device.

24. The method of claim 22 or 23, wherein, The method further comprises: sending first information to the network device, the first information comprising the correspondence between the HARQ identifier and the path identifier.

25. The method of claim 22 or 23, wherein, The method further comprises: receiving second information sent by the network device, the second information comprising the correspondence between the HARQ identifier and the path identifier.

26. The method of claim 22 or 23, wherein, The sending first request information to the network device comprises: receiving a negative acknowledgement (NACK) message sent by the second terminal device; according to the NACK message, sending the first request information to the network device.

27. The method of claim 22 or 23, wherein, The sending first request information to the network device comprises: sending the first request information to the network device through UE assistance information (UAI), a medium access control control element (MAC CE), or uplink control information (UCI).

28. The method of claim 22 or 23, wherein, The first request information is used to request the sidelink resource for retransmission.

29. The method of claim 22 or 23, wherein, The path identifier comprises at least one of: a target identifier corresponding to a transmission path, a source identifier corresponding to a transmission path, or an identifier of a sidelink.

30. The method of claim 22 or 23, wherein, The transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

31. A method of communication, comprising: The method comprises: receive second request information sent by a first terminal device through a first resource associated with a logical channel, the logical channel corresponding to a target transmission path, the target transmission path being a transmission path in a plurality of transmission paths between the first terminal device and a second terminal device, each of the plurality of transmission paths corresponding to a discontinuous reception (DRX) configuration; send a second resource to the first terminal device; receive first indication information sent by the first terminal device through the second resource, the first indication information being used to request a sidelink resource.

32. The method of claim 31, wherein, The first indication information is included in a buffer status report (BSR), and the first indication information is used to indicate that the sidelink resource is included in a resource request in the BSR.

33. The method of claim 31, wherein, The first indication information is included in a medium access control control element (MAC CE).

34. The method of claim 31, wherein, The first indication information is included in a SL BSR MAC CE, and the first indication information is used to request a sidelink resource for sending a SL channel state information (CSI) MAC CE.

35. The method of any one of claims 31-34, wherein, The sidelink resource corresponds to the target transmission path, and the sidelink resource is used for transmission on the target transmission path.

36. The method of any one of claims 31-34, wherein, The first resource is a scheduling request (SR) resource.

37. The method of any one of claims 31-34, wherein, The second resource is an uplink resource.

38. The method of any one of claims 31-34, wherein, The transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

39. A method of communication, the method comprising: The method comprises: send second request information to a network device through a first resource associated with a logical channel, the logical channel corresponding to a target transmission path, the target transmission path being a transmission path in a plurality of transmission paths between the first terminal device and a second terminal device, each of the plurality of transmission paths corresponding to a discontinuous reception (DRX) configuration; receive a second resource sent by the network device; send first indication information to the network device through the second resource, the first indication information being used to request a sidelink resource.

40. The method of claim 39, wherein, The first indication information is included in a buffer status report (BSR), and the first indication information is used to indicate that the sidelink resource is included in a resource request in the BSR.

41. The method of claim 39, wherein, The first indication information is included in a medium access control control element (MAC CE).

42. The method of claim 39, wherein, The first indication information is included in a SL BSR MAC CE, and the first indication information is used to request a sidelink resource for sending a SL channel state information (CSI) MAC CE.

43. The method of any one of claims 39-42, wherein, The sidelink resource corresponds to the target transmission path, and the sidelink resource is used for transmission on the target transmission path.

44. The method of any one of claims 39-42, wherein, The first resource is a scheduling request (SR) resource.

45. The method of any one of claims 39-42, wherein, The second resource is an uplink resource.

46. The method of any one of claims 39-42, wherein, The transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

47. A first communications device, characterized by: The apparatus comprises: a receiving module configured to receive a first message sent by a first terminal device, the first message comprising a path identifier; The processing module is configured to determine sidelink resources allocated to the first terminal device according to the path identifier and at least one of a target transmission path and a discontinuous reception (DRX) configuration associated with the path identifier, the target transmission path being a transmission path in a plurality of transmission paths between the first terminal device and a second terminal device, each of the plurality of transmission paths corresponding to a DRX configuration.

48. The apparatus of claim 47, wherein, The path identifier includes at least one of a target identifier corresponding to the transmission path, a source identifier corresponding to the transmission path, and an identifier of the sidelink.

49. The apparatus of claim 47 or 48, wherein, The path identifier is associated with at least one of a target transmission path and a discontinuous reception (DRX) configuration. The path identifier corresponds to the target transmission path and / or the path identifier corresponds to the DRX configuration.

50. The apparatus of claim 47 or 48, wherein, The transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

51. The apparatus of claim 47 or 48, wherein, The first message is used to request the sidelink resources for retransmission.

52. The apparatus of claim 51, wherein, The first message further includes hybrid automatic repeat request (HARQ) feedback.

53. The apparatus of claim 47 or 48, wherein, The first message is used to request the sidelink resources for initial transmission.

54. A second communications device, characterized by The apparatus includes: The sending module is configured to send a first message to a network device, the first message including a path identifier associated with at least one of a target transmission path and a discontinuous reception (DRX) configuration, the first message being used to request sidelink resources, the target transmission path being a transmission path in a plurality of transmission paths between the second communication apparatus and a second terminal device, each of the plurality of transmission paths corresponding to a DRX configuration; The receiving module is configured to receive the sidelink resources sent by the network device.

55. The apparatus of claim 54 wherein, The path identifier includes at least one of a target identifier corresponding to the transmission path, a source identifier corresponding to the transmission path, and an identifier of the sidelink.

56. The apparatus of claim 54 or 55, wherein, The path identifier is associated with at least one of a target transmission path and a discontinuous reception (DRX) configuration. The path identifier corresponds to the target transmission path and / or the path identifier corresponds to the DRX configuration.

57. The apparatus of claim 54 or 55, wherein, The transmission path is a sidelink between the second communication apparatus and the second terminal device for transmitting data.

58. The apparatus of claim 54 or 55, wherein, The first message is used to request the sidelink resources for retransmission.

59. The apparatus of claim 58 wherein, The first message further includes hybrid automatic repeat request (HARQ) feedback.

60. The apparatus of claim 54 or 55, wherein, The first message is used to request the sidelink resources for initial transmission.

61. A first communications device, characterized by: The apparatus includes: The processing module is configured to determine a correspondence between a hybrid automatic repeat request (HARQ) identifier and a path identifier. The receiving module is configured to receive first request information sent by a first terminal device, the first request information being used to request sidelink resources. The processing module is further configured to determine a path identifier according to the correspondence between the HARQ identifier and the path identifier, and allocate the sidelink resource for the first terminal device according to at least one of a target transmission path associated with the path identifier and a discontinuous reception (DRX) configuration, the target transmission path being a transmission path in a plurality of transmission paths between the first terminal device and a second terminal device, each of the plurality of transmission paths corresponding to a DRX configuration.

62. The apparatus of claim 61, wherein, The receiving module is further configured to receive first information from the first terminal device, the first information comprising the correspondence between the HARQ identifier and the path identifier.

63. The device of claim 61, wherein, The apparatus further comprises: The sending module is configured to send second information to the first terminal device, the second information comprising the correspondence between the HARQ identifier and the path identifier.

64. The apparatus of claim 63, wherein, The receiving module is further configured to receive path information sent by the first terminal device, the path information comprising the path identifier. The processing module is further configured to establish the correspondence between the HARQ identifier and the path identifier.

65. The apparatus of any one of claims 61-64, wherein, The receiving module is further configured to receive the first request information sent by the first terminal device through UE assistance information (UAI), a medium access control control element (MAC CE), or uplink control information (UCI).

66. The apparatus of any one of claims 61-64, wherein, The first request information is used to request the sidelink resource for retransmission.

67. The apparatus of any one of claims 61-64, wherein, The path identifier comprises at least one of a target identifier corresponding to a transmission path, a source identifier corresponding to a transmission path, or an identifier of a sidelink.

68. A second communications device, characterized by The apparatus comprises: The processing module is configured to determine a correspondence between a hybrid automatic repeat request (HARQ) identifier and a path identifier. The sending module is configured to send first request information to a network device, the first request information being used to request a sidelink resource, and the correspondence between the HARQ identifier and the path identifier being used to determine at least one of a target transmission path corresponding to the sidelink resource and a discontinuous reception (DRX) configuration, the target transmission path being a transmission path in a plurality of transmission paths between the second communication apparatus and a second terminal device, each of the plurality of transmission paths corresponding to a DRX configuration.

69. The apparatus of claim 68 wherein, The apparatus further comprises: The receiving module is configured to receive the sidelink resource sent by the network device.

70. The apparatus of claim 68 or 69, wherein, The sending module is further configured to send first information to the network device, the first information comprising the correspondence between the HARQ identifier and the path identifier.

71. The apparatus of claim 68 or 69, wherein, The apparatus further comprises: The receiving module is configured to receive second information sent by the network device, the second information comprising the correspondence between the HARQ identifier and the path identifier.

72. The apparatus of claim 68 or 69, wherein, The apparatus further comprises: The receiving module is configured to receive a negative acknowledgement (NACK) message sent by the second terminal device. The sending module is further configured to send, according to the NACK message, the first request information to the network device.

73. The apparatus of claim 68 or 69, wherein, The sending module is further configured to send, to the network device, the first request information through UE assistance information (UAI), a medium access control control element (MAC CE), or uplink control information (UCI).

74. The apparatus of claim 68 or 69, wherein, The first request information is used to request the sidelink resource for retransmission.

75. The apparatus of claim 68 or 69, wherein, The path identifier includes at least one of a target identifier corresponding to the transmission path, a source identifier corresponding to the transmission path, or an identifier of the sidelink.

76. The apparatus of claim 68 or 69, wherein, The transmission path is a sidelink between the second communication apparatus and the second terminal device for transmitting data.

77. A first communications device, characterized by The apparatus includes: The receiving module is configured to receive second request information sent by a first terminal device through a first resource associated with a logical channel, the logical channel corresponding to a target transmission path, the target transmission path being a transmission path in a plurality of transmission paths between the first terminal device and a second terminal device, each transmission path in the plurality of transmission paths corresponding to a discontinuous reception (DRX) configuration. The sending module is configured to send a second resource to the first terminal device. The receiving module is further configured to receive first indication information sent by the first terminal device through the second resource, the first indication information being used to request a sidelink resource.

78. The device of claim 77, wherein, The first indication information is included in a buffer status report (BSR), and the first indication information is used to indicate that the sidelink resource is included in a resource request in the BSR.

79. The device of claim 77, wherein, The first indication information is included in a medium access control control element (MAC CE).

80. The device of claim 77, wherein, The first indication information is included in a SL BSR MAC CE, and the first indication information is used to request a sidelink resource for sending a SL channel state information (CSI) MAC CE.

81. The apparatus of any one of claims 77-80, wherein, The sidelink resource corresponds to the target transmission path, and the sidelink resource is used for transmission on the target transmission path.

82. The apparatus of any one of claims 77-80, wherein, The first resource is a scheduling request (SR) resource.

83. The apparatus of any one of claims 77-80, wherein, The second resource is an uplink resource.

84. The apparatus of any one of claims 77-80, wherein, The transmission path is a sidelink between the first terminal device and the second terminal device for transmitting data.

85. A second communications device, characterized by The apparatus includes: The sending module is configured to send second request information to a network device through a first resource associated with a logical channel, the logical channel corresponding to a target transmission path, the target transmission path being a transmission path in a plurality of transmission paths between the second communication apparatus and a second terminal device, each transmission path in the plurality of transmission paths corresponding to a discontinuous reception (DRX) configuration. The receiving module is configured to receive a second resource sent by the network device. The sending module is configured to send first indication information to the network device through the second resource, the first indication information being used to request a sidelink resource.

86. The apparatus of claim 85, wherein, The first indication information is included in a buffer status report (BSR), and the first indication information is used to indicate that the sidelink resource is included in a resource request in the BSR.

87. The apparatus of claim 85, wherein, The first indication information is included in a medium access control control element (MAC CE).

88. The device of claim 85, wherein, The first indication information is contained in a SL BSR MAC CE, and the first indication information is used to request a sidelink resource for sending a sidelink channel state report CSI MAC CE.

89. The apparatus of any one of claims 85-88, wherein, The sidelink resource corresponds to the target transmission path, and the sidelink resource is used for transmission on the target transmission path.

90. The device of any one of claims 85-88, wherein, The first resource is a scheduling request SR resource.

91. The apparatus of any one of claims 85-88, wherein, The second resource is an uplink resource.

92. The apparatus of any one of claims 85-88, wherein, The transmission path is a sidelink between the second communication device and the second terminal device for transmitting data.

93. An apparatus, comprising: A processor and a memory are included, the memory is used to store instructions, and the processor executes the instructions to enable the device to perform the method in any one of claims 1-46.

94. A chip, comprising: The chip is a chip in a network device or a terminal device, the chip includes a processor and an input interface and an output interface connected to the processor, and the chip further includes a memory, and when code is executed, the method in any one of claims 1-46 is executed.

95. A computer-readable storage medium, comprising: Instructions for storing, when the instructions are executed on a computer, enable the computer to perform the method in any one of claims 1-46.

96. A computer program product, characterised in that, The computer program product includes one or more computer instructions, when the computer instructions are executed on a computer, enable the computer to perform the method in any one of claims 1-46.

97. A communication system, characterized by The system includes at least one network device and at least one terminal device, the network device executes the method in any one of claims 1-7, 15-21 and 31-38, and the terminal device executes the method in any one of claims 8-14, 22-30 and 39-46.

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