Automatic retransmission method and device

Abstract

This disclosure discloses an automatic retransmission method, apparatus, device, and storage medium, belonging to the field of communication technology. The method includes determining the automatic retransmission of the terminal device using at least one of the following information: a sidelink SL retransmission timer; and configuring the maximum authorized transmission count. This disclosure provides a processing method for an "automatic retransmission" scenario, providing a mechanism for determining automatic retransmission on the Sidelink configuration authorization, which can solve the problem of unclear automatic retransmission mechanisms and improve the accuracy of automatic retransmission.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to an automatic retransmission method, apparatus, device and storage medium. Background Technology

[0002] In communication systems, sidelink communication is introduced to support direct communication between terminal devices. Depending on the correspondence between sending and receiving terminal devices, various transmission methods can be supported on the sidelink. These methods may include unicast, multicast, and broadcast. Summary of the Invention

[0003] This disclosure presents an automatic retransmission method, apparatus, device, and storage medium to provide a mechanism for determining automatic retransmission on Sidelink configuration authorization, which can solve the problem of unclear automatic retransmission mechanism and improve the accuracy of automatic retransmission.

[0004] One embodiment of this disclosure provides an automatic retransmission method, which is executed by a terminal device and includes:

[0005] The automatic retransmission of the terminal device is determined by at least one of the following pieces of information:

[0006] Side link SL retransmission timer;

[0007] Configure the maximum number of authorized transfers.

[0008] An automatic retransmission method is proposed in one embodiment of this disclosure, the method being executed by a network device, including:

[0009] Send at least one of the following messages to the terminal device:

[0010] Side link SL retransmission timer;

[0011] Configure the maximum number of authorized transfers.

[0012] Another aspect of this disclosure provides a communication device, comprising:

[0013] The determination module is configured to determine the automatic retransmission of the terminal device based on at least one of the following information:

[0014] Side link SL retransmission timer;

[0015] Configure the maximum number of authorized transfers.

[0016] Another aspect of this disclosure provides a network device, characterized in that it includes:

[0017] The sending module is used to send at least one of the following information to the terminal device:

[0018] Side link SL retransmission timer;

[0019] Configure the maximum number of authorized transfers.

[0020] Another aspect of this disclosure provides a terminal device including a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory to cause the device to perform the method as described in the preceding aspect of the embodiment.

[0021] Another aspect of this disclosure provides a network device including a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory to cause the device to perform the method as described in the preceding aspect of the embodiment.

[0022] Another aspect of this disclosure provides a communication device, including: a processor and an interface circuit;

[0023] The interface circuit is used to receive code instructions and transmit them to the processor;

[0024] The processor is configured to run the code instructions to perform the method as proposed in one aspect of the embodiments.

[0025] Another aspect of this disclosure provides a computer-readable storage medium for storing instructions that, when executed, cause the method described in one aspect of the disclosure to be implemented.

[0026] In summary, in the embodiments of this disclosure, the automatic retransmission of the terminal device is determined by at least one of the following pieces of information: the sidelink SL retransmission timer; and the configured maximum number of authorized transmissions. In the embodiments of this disclosure, an automatic retransmission mechanism can be provided on the Sidelink configuration license, reducing the ambiguity of the automatic retransmission mechanism due to Sidelink's enhanced support for unlicensed spectrum, thereby improving the accuracy of automatic retransmission and data transmission. This disclosure provides a processing method for an "automatic retransmission" scenario, providing a mechanism for determining automatic retransmission on the Sidelink configuration license, resolving the ambiguity of the automatic retransmission mechanism, and improving the accuracy of automatic retransmission. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0028] Figure 1 This is a schematic diagram illustrating an example of a communication system provided in one embodiment of the present disclosure;

[0029] Figure 2 This is an example diagram illustrating a transmission resource provided in one embodiment of the present disclosure;

[0030] Figure 3 This is a flowchart illustrating an automatic retransmission method provided in one embodiment of the present disclosure.

[0031] Figure 4 This is a flowchart illustrating an automatic retransmission method provided in yet another embodiment of this disclosure;

[0032] Figure 5 This is a flowchart illustrating an automatic retransmission method provided in yet another embodiment of this disclosure;

[0033] Figure 6 This is a flowchart illustrating an automatic retransmission method provided in yet another embodiment of this disclosure;

[0034] Figure 7 An interactive schematic diagram of an automatic retransmission method provided in yet another embodiment of this disclosure;

[0035] Figure 8 This is a schematic diagram of the structure of an automatic retransmission system provided in an embodiment of the present disclosure;

[0036] Figure 9 A schematic diagram of an automatic retransmission device provided in another embodiment of this disclosure;

[0037] Figure 10 A schematic diagram of an automatic retransmission device provided in another embodiment of this disclosure;

[0038] Figure 11 This is a block diagram of a terminal device provided in one embodiment of the present disclosure;

[0039] Figure 12 This is a block diagram of a network device provided in one embodiment of the present disclosure. Detailed Implementation

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this disclosure as detailed in the appended claims.

[0041] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0042] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of embodiments of this disclosure, and similarly, second information may also be referred to as first information. Depending on the context, the words “if” and “suppose” as used herein may be interpreted as “when”, “when”, or “in response to a determination”.

[0043] The network elements or network functions involved in the embodiments of this disclosure can be implemented by independent hardware devices or by software in hardware devices. This disclosure does not limit this.

[0044] like Figure 1 As shown, this disclosure provides a communication system including: core network equipment 11 (e.g., 5G core network (5th generation core, 5GC), evolved packet core (EPC)), access network equipment 12 (e.g., evolved node B (gNB), evolved node B (eNB)), and terminal equipment 13.

[0045] Terminal equipment 13, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., refers to devices that provide voice and / or data connectivity to users. Examples include handheld devices with wireless connectivity and in-vehicle devices. Currently, some examples of terminal equipment include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes.

[0046] Core network equipment 11 refers to the equipment in the core network (CN) that provides service support for terminal equipment. For example, core network equipment includes the 5G core network (5GC) 11 and the evolved packet core (EPC) 12. Some core network equipment includes: access and mobility management functions (AMF), session management functions (SMF), user plane functions (UPF), etc., which are not listed here. Among them, the AMF can be responsible for the access management and mobility management of terminal equipment. The SMF can be responsible for session management, such as user session establishment. The UPF can be a user plane functional entity, mainly responsible for connecting to external networks.

[0047] Access network equipment 12 refers to a radio access network (RAN) node (or device) that connects terminal devices to a wireless network; it can also be called a base station. For example, access network equipment includes evolved node B (gNB) and evolved node B (eNB). Examples of RAN nodes include: gNB, eNB, transmission reception point (TRP), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved node B, or home node B, HNB), base band unit (BBU), or wireless fidelity (Wi-Fi) access point (AP), etc. Furthermore, in a network architecture, access network equipment may include a centralized unit (CU), a distributed unit (DU), or RAN equipment including both CU and DU. This includes RAN devices for CU and DU that separate the protocol layer from a logical function perspective. Some protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU, which is centrally controlled by the CU.

[0048] It is understood that the communication system described in the embodiments of this disclosure is for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and does not constitute a limitation on the technical solutions provided in the embodiments of this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this disclosure are also applicable to similar technical problems.

[0049] in, Figure 1 The entities shown are illustrative; the implementation methods or embodiments of this disclosure may include... Figure 1 All or part of the main body, or may include Figure 1 Other entities besides these, the number of each entity is arbitrary, not limited to Figure 1 . Figure 1 The connections shown are illustrative. Any entities may be connected or not connected, and the connection can be in any way, whether it is a direct or indirect connection, a wired connection or a wireless connection.

[0050] Optionally, in one embodiment of this disclosure, a sidelink communication method is introduced to support direct communication between terminal devices. The interface between terminal devices can be, for example, a PC-5 interface. Depending on the correspondence between the sending and receiving terminal devices, three transmission methods can be supported on the sidelink: unicast, multicast, and broadcast. The sending terminal device transmits sidelink control information (SCI) on the Physical Sidelink Control Channel (PSCCH) and a second-stage SCI on the Physical Sidelink Shared Channel (PSSCH), which carries the resource location of the transmitted data and source and destination identifiers, etc. New Radio Sidelink (NR Sidelink) supports Hybrid Automatic Repeat Request (HARQ) feedback, allowing network devices to configure HARQ attributes for Sidelink logical channels (SL-LCH), including HARQ-enabled and HARQ-disabled. For HARQ-enabled logical channels (LCH), during Link Control Protocol (LCP) operations, they can only be multiplexed with other HARQ-enabled LCHs belonging to the same destination address. For HARQ-disabled LCHs, during LCP operations, they can only be multiplexed with other HARQ-disabled LCHs belonging to the same destination address. For HARQ-enabled packets, HARQ feedback is required; in NR Sidelink, HARQ feedback is carried through the Physical Sidelink Feedback Channel (PSFCH).

[0051] Optionally, in one embodiment of this disclosure, sidelink communication has two transmission resource allocation methods: one is a network dynamic scheduling method (mode 1), and the other is a method where the terminal device autonomously selects from the network-configured or pre-configured resource pool (mode 2). Dynamic scheduling involves the network dynamically allocating sidelink transmission resources to the terminal device based on the terminal device's cached data report, while autonomous selection involves the terminal device randomly selecting transmission resources from the network-configured or pre-configured resource pool. The network device can configure multiple resource pools for the UE on a single bandwidth (BWP). The specific allocation method used is configured by the network device through Radio Resource Control (RRC) signaling. A terminal device operating in mode 1 can transmit sidelink data through a dynamic sidelink grant scheduled by the network device, or through a configured sidelink grant configured by the network device. The dynamic scheduling grant can indicate three transmission resources through a Downlink Control Information (DCI), including PSCCH and PSSCH resources. If the New Data Indicator (NDI) in the DCI has flipped compared to the last schedule, these three transmission resources are newtransmission resources and retransmission resources; if the NDI in the DCI has not flipped compared to the last schedule, these three transmission resources are retransmission resources. Configuration authorization determines the location of transmission resources through network configuration. A configuration authorization cycle includes three transmission resources: newtransmission resources and retransmission resources. An example diagram of these transmission resources can be shown below. Figure 2 As shown.

[0052] Optionally, in one embodiment of this disclosure, the configured sidelink grant only supports retransmissions within a single configuration grant period. That is, for a Protocol Data Unit (MAC PDU), the configuration grant can perform a maximum of one new transmission and two retransmissions. Retransmissions across configuration grant periods are not supported. The HARQ process ID used in the configuration grant is associated with a time period (CURRENT_slot, PeriodicitySL). Although retransmissions across configuration grant periods are not supported, Release 16 introduces a maximum number of retransmissions for configuration grants, which can be configured to, for example, 32.

[0053] Optionally, in one embodiment of this disclosure, the New Radio Unlicensed (NR-U) spectrum is a project initiated by the 3rd Generation Partnership Project (3GPP) in Release 16, providing operators with the necessary technology to fully integrate unlicensed spectrum into 5G network equipment. NR-U supports uplink and downlink operations in unlicensed frequency bands. In NR-U, both downlink and uplink channel access rely on the listen-before-talk (LBT) feature. The wireless device or base station must first "sense" the communication channel, determining that no other device is communicating before any transmission.

[0054] Optionally, in one embodiment of this disclosure, the New Radio Unlicensed (NR-U) spectrum supports autonomous uplink transmission (AUL) on configured grant (CG). Automatic transmission means that the terminal device can perform automatic transmission or automatic retransmission. The network device controls the automatic transmission of the terminal device by configuring a configured grant timer (CGT) and a configured grant retransmission timer (CGRT) for the terminal device. Upon successful new transmission, the terminal device starts the CGT (Configured Transfer Gateway). During CGT operation, the terminal device cannot use the HARQ process associated with this new transmission for new transmission. Upon successful new transmission or retransmission, the terminal device starts or restarts the CGRT (Configured Transfer Gateway). During CGRT operation, the terminal device cannot use configured grants for retransmission. If CGRT times out, the terminal device defaults to a negative acknowledgment (NACK) for the HARQ response of the data packet and performs automatic retransmission on the next configured grant (CG) resource. The length of the CGRT is less than or equal to the length of the CGT. When the CGT times out or stops, the terminal device must also stop the CGRT. Automatic retransmission can only occur during CGT operation. After CGT timeout, the terminal device can use this HARQ process for new transmission. The terminal device stops CGT and CGRT upon receiving a DCI (Distributed Access Code) for retransmission scheduled by the network device or an acknowledgment (ACK) from the network device. To support the automatic retransmission mechanism, the HARQ process ID in NR-U is not bound to time. Instead, the terminal device selects it from the available HARQ process IDs configured. In other words, for a given configuration authorization, the terminal device decides which HARQ process ID to use.

[0055] The following is a detailed description of an automatic retransmission method, apparatus, device, and storage medium provided in the embodiments of this disclosure, with reference to the accompanying drawings.

[0056] Figure 3 This is a flowchart illustrating an automatic retransmission method provided in an embodiment of this disclosure. The method is executed by a terminal device, such as... Figure 3 As shown, the method may include the following steps:

[0057] Step 301: Determine the automatic retransmission of the terminal device using at least one of the following pieces of information:

[0058] Side link SL retransmission timer;

[0059] Configure the maximum number of authorized transfers.

[0060] It should be noted that, in one embodiment of this disclosure, the executing entity of this embodiment may be, for example, a terminal device. The terminal device may be a device that provides voice and / or data connectivity to a user. The terminal device may communicate with one or more core networks via a RAN (Radio Access Network). The terminal device may be an Internet of Things (IoT) terminal, such as a sensor device, a mobile phone (or "cellular" phone), or a computer with an IoT terminal. For example, it may be a fixed, portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted device. Examples include a station (STA), subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, and user equipment (UE). Alternatively, the terminal device may also be a device from an unmanned aerial vehicle (UAV). Alternatively, the terminal device may also be a vehicle-mounted device, such as a vehicle computer with wireless communication capabilities, or a wireless terminal connected to an external vehicle computer. Alternatively, the terminal device can also be a roadside device, such as a street light, traffic light, or other roadside device with wireless communication capabilities.

[0061] In one embodiment of this disclosure, the automatic retransmission method can be applied, for example, to a sidelink-unlicensed (Sidelink-U) scenario.

[0062] Furthermore, in one embodiment of this disclosure, the sidelink SL retransmission timer may be a timer used to control whether automatic retransmission is possible on the configuration grant. This SL retransmission timer may be, for example, an SL configuration grant retransmission timer, or an SL timer; the name of the SL retransmission timer is not limited here.

[0063] Furthermore, in one embodiment of this disclosure, configuring the maximum authorized number of transmissions may, for example, refer to configuring the maximum number of authorized transmissions.

[0064] In one embodiment of this disclosure, different SL processes can be associated with different SL retransmission timers. One SL process can be associated with one SL retransmission timer. The timing duration of the SL retransmission timers (slcg-retransmissiontimer) associated with different SL processes can, for example, be the same. An SL process can maintain the SL retransmission timer corresponding to its own SL process. In this embodiment of the disclosure, the SL process can be, for example, an SLHARQ process.

[0065] Furthermore, in one embodiment of this disclosure, the timing duration of the SL retransmission timer corresponding to different SL processes may be different, for example.

[0066] Furthermore, in one embodiment of this disclosure, an SL retransmission timer may be defined, for example, which may be configured by a network device, for example, at at least one of the following granularities: per user equipment (UE), per configured grant configuration (CG configuration), per resource pool, per band width part (BWP), and per resource block set (RB set).

[0067] For example, in one embodiment of this disclosure, the SL retransmission timer may be configured by the network device at the granularity of each terminal device, and different terminal devices may be configured with the same or different SL retransmission timers.

[0068] For example, in one embodiment of this disclosure, the SL retransmission timer may be configured by the network device at the granularity of each configuration authorization configuration. Different configuration authorization configurations may be configured with the same or different SL retransmission timers.

[0069] For example, in one embodiment of this disclosure, the SL retransmission timer may be configured by the network device at the granularity of each resource pool. Different resource pools may be configured with the same or different SL retransmission timers.

[0070] For example, in one embodiment of this disclosure, the SL retransmission timer may be configured by a network device at a per-sub-bandwidth granularity. Different sub-bandwidths may be configured with the same or different SL retransmission timers.

[0071] For example, in one embodiment of this disclosure, the SL retransmission timer may be configured by the network device at the granularity of each resource block set. Different resource blocks may be configured with the same or different SL retransmission timers.

[0072] In one embodiment of this disclosure, determining the automatic retransmission of the terminal device includes at least one of the following:

[0073] In response to the successful transmission of a new data transfer upon successful SL configuration authorization, the SL retransmission timer associated with the corresponding SL HARQ process for the new data transfer is started.

[0074] In response to successful retransmission of SL configuration authorization, restart the SL retransmission timer associated with the SL HARQ process;

[0075] In response to a failure indication message for receiving a Listen Before Talk (LBT) message in the new transmission, the SL retransmission timer associated with the SL HARQ process is not started, and automatic transmission is performed on the next configuration authorization.

[0076] In response to receiving an LBT failure indication message for retransmission, the SL retransmission timer associated with the SL HARQ process is not restarted, and automatic retransmission is performed on the next configuration authorization.

[0077] For example, in one embodiment of this disclosure, a successful new transmission or retransmission of SL configuration authorization may be achieved if the terminal device does not receive an LBT failure indication message from the physical layer.

[0078] For example, in one embodiment of this disclosure, the terminal device may receive LBT failure indication information from the physical layer. The LBT failure indication information received by the terminal device from the physical layer may be, for example, indicate that the transmission failed due to the Listen-After-Talk LBT failure.

[0079] For example, in one embodiment of this disclosure, in response to a new transmission failing due to a Listen-After-Talk (LBT) failure, the SL retransmission timer associated with the SL HARQ process is not started, and automatic transmission is performed on the next configuration authorization.

[0080] For example, in one embodiment of this disclosure, in response to a retransmission failure due to a Listen-After-Talk (LBT) failure, the SL retransmission timer associated with the SL HARQ process is not restarted, and an automatic retransmission is performed on the next configuration authorization.

[0081] For example, in one embodiment of this disclosure, in response to receiving a Listen-Before-Speak (LBT) failure indication message from the physical layer for a new transmission, the SL retransmission timer associated with the SL HARQ process is not started, and automatic transmission is performed on the next configuration authorization.

[0082] For example, in one embodiment of this disclosure, in response to receiving an LBT failure indication message from the physical layer for retransmission, the SL retransmission timer associated with the SL HARQ process is not restarted, and automatic retransmission is performed on the next configuration authorization.

[0083] In one embodiment of this disclosure, the LBT failure indication information received from the physical layer may be, for example, sent by the physical layer to the media access control (MAC) layer.

[0084] Specifically, in one embodiment of this disclosure, the terminal device may start or restart the SL retransmission timer at the first slot or first symbol at the end of a new transmission or retransmission. For example, the terminal device may start the SL retransmission timer at the first slot at the end of a new transmission. For example, the terminal device may restart the SL retransmission timer at the first slot at the end of a retransmission. For example, the terminal device may start the SL retransmission timer at the first symbol at the end of a new transmission. For example, the terminal device may restart the SL retransmission timer at the first symbol at the end of a retransmission.

[0085] In one embodiment of this disclosure, the method further includes:

[0086] The SL retransmission timer associated with the SL HARQ process is running, and automatic retransmission is not configured in the authorization settings.

[0087] If the SL retransmission timer associated with the SL HARQ process times out or stops, automatic retransmission will be performed on the next configuration authorization.

[0088] For example, in one embodiment of this disclosure, during the operation of the SL retransmission timer associated with the SL HARQ process, the terminal device may not, for example, perform automatic retransmission on the configuration authorization.

[0089] For example, in one embodiment of this disclosure, if the SL retransmission timer associated with the SL HARQ process times out, the terminal device may, for example, acknowledge a negative acknowledgment (NACK), and the terminal device may perform automatic retransmission on the next configuration authorization.

[0090] For example, in one embodiment of this disclosure, if the SL retransmission timer associated with the SL HARQ process stops, automatic retransmission can be performed, for example, on the next configuration authorization.

[0091] For example, in one embodiment of this disclosure, the terminal device may not perform automatic retransmission on the configuration authorization during the operation of the SL retransmission timer associated with the SL HARQ process.

[0092] For example, in one embodiment of this disclosure, in response to the timeout of the SL retransmission timer associated with the SL HARQ process, the terminal device may, for example, acknowledge a negative acknowledgment (NACK), and the terminal device may perform automatic retransmission on the next configuration authorization.

[0093] For example, in one embodiment of this disclosure, in response to the SL retransmission timer associated with the SL HARQ process stopping, automatic retransmission may be performed, for example, on the next configuration authorization.

[0094] Furthermore, in one embodiment of this disclosure, the method further includes:

[0095] For SL configuration grant transmissions with HARQ feedback enabled, in response to the detection of Hybrid Automatic Repeat Request (HARQ) feedback on the physical link feedback channel (PSFCH) resource associated with new or retransmission on the SL configuration grant, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped.

[0096] In one embodiment of this disclosure, HARQ feedback may be sent from the receiving terminal to the sending terminal.

[0097] For example, in one embodiment of this disclosure, for a HARQ-enabled SL configuration grant transmission, in response to the detection of Hybrid Automatic Repeat Request (HARQ) feedback on the physical side link feedback channel (PSFCH) resource associated with the new transmission on the SL configuration grant, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped.

[0098] For example, in one embodiment of this disclosure, for a HARQ-enabled SL configuration grant transmission, in response to the detection of Hybrid Automatic Repeat Request (HARQ) feedback on the physical side link feedback channel (PSFCH) resource associated with the SL configuration grant retransmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped.

[0099] For example, in one embodiment of this disclosure, for HARQ feedback enabled SL configuration authorization transmission, SL configuration authorization may refer to the configuration authorization for transmitting the SL MAC PDU. The SL HARQ process in this embodiment may be, for example, the SL HARQ process associated with the SL MAC PDU.

[0100] For example, in one embodiment of this disclosure, in response to the detection of HARQ feedback on the PSFCH resource associated with the SL configuration authorization and the determination that the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped.

[0101] For example, in one embodiment of this disclosure, in response to the detection of HARQ feedback on the PSFCH resource associated with the SL configuration authorization retransmission, and determining that the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped.

[0102] Furthermore, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, stopping the SL retransmission timer associated with the SL HARQ process further includes at least one of the following:

[0103] When HARQ feedback is ACK, the SL retransmission timer associated with the SL HARQ process is stopped;

[0104] If the HARQ response is NACK, stop the SL retransmission timer associated with the SL HARQ process and perform automatic retransmission on the next configuration authorization.

[0105] For example, in one embodiment of this disclosure, for SL configuration authorized transmission with HARQ feedback enabled, when the service type is unicast, in response to the detection of HARQ feedback on the PSFCH resource associated with newtransmission or retransmission, and the HARQ feedback being ACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped. The service type is the service type associated with newtransmission or retransmission.

[0106] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is unicast, in response to the detection of HARQ feedback on the PSFCH resource associated with newtransmission or retransmission, and the HARQ feedback being NACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with newtransmission or retransmission.

[0107] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is unicast, in response to the detection of HARQ feedback on the PSFCH resource associated with newtransmission or retransmission, and the HARQ feedback is ACK, the SL retransmission timer associated with the SL HARQ process is stopped; in response to the detection of HARQ feedback on the PSFCH resource associated with newtransmission or retransmission, and the HARQ feedback is NACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with newtransmission or retransmission.

[0108] Furthermore, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, stopping the SL retransmission timer associated with the SL HARQ process further includes at least one of the following:

[0109] In response to HARQ feedback being ACK, if the SL retransmission timer associated with the SL HARQ process is running, stop the SL retransmission timer associated with the SL HARQ process.

[0110] In response to a NACK HARQ response, if the SL retransmission timer associated with the SL HARQ process is running, stop the SL retransmission timer associated with the SL HARQ process and perform automatic retransmission on the next configuration authorization.

[0111] For example, in one embodiment of this disclosure, for SL configuration authorized transmission with HARQ feedback enabled, when the service type is unicast, in response to the detection of HARQ feedback on the PSFCH resource associated with newtransmission or retransmission, and the HARQ feedback being ACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped. The service type is the service type associated with newtransmission or retransmission.

[0112] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is unicast, in response to the detection of HARQ feedback on the PSFCH resource associated with newtransmission or retransmission, and the HARQ feedback being NACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with newtransmission or retransmission.

[0113] For example, in one embodiment of this disclosure, for SL configuration authorized transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is ACK-NACK feedback mode, in response to the detection of HARQ feedback on the PSFCH resource associated with the new transmission, and the HARQ feedback being ACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped. The service type is the service type associated with the new transmission.

[0114] For example, in one embodiment of this disclosure, for SL configuration authorized transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is ACK-NACK feedback mode, in response to the detection of HARQ feedback on the PSFCH resource associated with retransmission, and the HARQ feedback being ACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped. The service type is the service type associated with the retransmission.

[0115] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is ACK-NACK feedback mode, in response to the detection of HARQ feedback on the PSFCH resource associated with the new transmission, and the HARQ feedback being NACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with the new transmission.

[0116] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is ACK-NACK feedback mode, in response to detecting HARQ feedback on the PSFCH resource associated with retransmission, and the HARQ feedback being NACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with the retransmission.

[0117] Furthermore, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, stopping the SL retransmission timer associated with the SL HARQ process further includes at least one of the following:

[0118] If the HARQ feedback is ACK, and the SL retransmission timer associated with the SL HARQ process is running, stop the SL retransmission timer associated with the SL HARQ process.

[0119] If the HARQ response is NACK, and the SL retransmission timer associated with the SL HARQ process is running, stop the SL retransmission timer associated with the SL HARQ process and perform automatic retransmission on the next configuration authorization.

[0120] For example, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, if HARQ feedback is detected on the PSFCH resource associated with newtransmission or retransmission and the HARQ feedback is ACK, and the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped; if HARQ feedback is detected on the PSFCH resource associated with newtransmission or retransmission and the HARQ feedback is NACK, and the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration authorization.

[0121] For example, in one embodiment of this disclosure, when the service type is multicast service and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast service, if HARQ feedback is detected on the PSFCH resource associated with newcast or retransmission and the HARQ feedback is ACK, and if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped.

[0122] For example, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, if HARQ feedback is detected on the PSFCH resource associated with newcast or retransmission and the HARQ feedback is NACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration authorization.

[0123] Furthermore, in one embodiment of this disclosure, when the service type is multicast service and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast service, in response to the detection of HARQ feedback on the PSFCH resource associated with new transmission or retransmission, and the HARQ feedback is NACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped.

[0124] Furthermore, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, in response to the detection of HARQ feedback on the PSFCH resource associated with newtransmission or retransmission, and the HARQ feedback being NACK, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the configuration authorization associated with the SL HARQ process. The associated configuration authorization could be, for example, a subsequent configuration authorization associated with the SL HARQ process. The associated configuration authorization could also be, for example, the next-next configuration authorization.

[0125] Furthermore, in one embodiment of this disclosure, the method further includes:

[0126] For SL configuration license transmissions with HARQ feedback enabled, if no HARQ feedback is detected on the PSFCH resource associated with the new or retransmission, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration license.

[0127] For example, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, for SL configuration grant transmission with HARQ feedback enabled, in response to the absence of HARQ feedback on the PSFCH resource associated with new transmission or retransmission, the SL retransmission timer associated with the SLHARQ process is stopped, and automatic retransmission is performed on the next configuration grant.

[0128] For example, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, for SL configuration license transmission with HARQ feedback enabled, in response to the absence of HARQ feedback on the PSFCH resource associated with newtransmission or retransmission, the SL retransmission timer associated with the SLHARQ process is stopped.

[0129] For example, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and NACK (ACK-NACK), or when the service type is unicast, for SL configuration grant transmission with HARQ feedback enabled, in response to the absence of HARQ feedback detected on the PSFCH resource associated with the newtransmission or retransmission, the SL retransmission timer associated with the SLHARQ process is stopped, and automatic retransmission is performed on the configuration grant associated with the SL HARQ process. The associated configuration grant could be, for example, a subsequent configuration grant associated with the SL HARQ process. The associated configuration grant could also be, for example, the next-to-next configuration grant.

[0130] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is unicast, in response to no HARQ feedback being detected on the PSFCH resource associated with the new transmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with the new transmission.

[0131] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is unicast, in response to no HARQ feedback being detected on the PSFCH resource associated with retransmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with retransmission.

[0132] For example, in one embodiment of this disclosure, if a PSSCH transmission can be associated with more than one PSFCH resource, the response to no HARQ feedback detected on the PSFCH resource associated with the new transmission may mean that no HARQ feedback was detected on any of the more than one PSFCH resource associated with the new transmission, and the response to no HARQ feedback detected on the PSFCH resource associated with the retransmission may mean that no HARQ feedback was detected on any of the more than one PSFCH resource associated with the retransmission.

[0133] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), in response to no HARQ feedback being detected on the PSFCH resource associated with the new transmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with the new transmission.

[0134] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), in response to no HARQ feedback being detected on the PSFCH resource associated with the retransmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with the retransmission.

[0135] For example, in one embodiment of this disclosure, the response to no HARQ feedback detected on the PSFCH resource associated with new transmission can specifically mean that no HARQ feedback was detected on any PSFCH resource associated with new transmission, and the response to no HARQ feedback detected on the PSFCH resource associated with retransmission can specifically mean that no HARQ feedback was detected on any PSFCH resource associated with retransmission. Each of the multiple receiving terminal devices in the group has a corresponding PSFCH resource, and in this embodiment of the disclosure, for example, it could mean that no HARQ feedback was detected on the PSFCH resource associated with any one terminal device.

[0136] Furthermore, in one embodiment of this disclosure, the method further includes:

[0137] For SL configuration grant transmissions with HARQ feedback enabled, if no HARQ feedback is detected on the PSFCH resource associated with the new or retransmission, and if the SL retransmission timer associated with the SL HARQ process is running, automatic retransmission can be performed on the next configuration grant if the SL retransmission timer associated with the SL HARQ process times out.

[0138] Furthermore, in one embodiment of this disclosure, when the service type is multicast service and the HARQ feedback mode is NACK-only, in response to the detection of Hybrid Automatic Repeat Request (HARQ) feedback on the physical link feedback channel (PSFCH) resource associated with new transmission or retransmission on the SL configuration grant, the SL retransmission timer associated with the SL HARQ process is stopped, including:

[0139] In response to the detection of HARQ feedback on the PSFCH resource associated with new or retransmission under SL configuration authorization, the SL retransmission timer associated with the SLHARQ process is stopped, and automatic retransmission is performed on the next configuration authorization.

[0140] Furthermore, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is multicast service and the HARQ feedback mode is NACK-only, in response to the detection of Hybrid Automatic Repeat Request (HARQ) feedback on the physical link feedback channel (PSFCH) resource associated with new or retransmission on the SL configuration grant, the SL retransmission timer associated with the SL HARQ process is stopped.

[0141] Furthermore, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is NACK-only, in response to the detection of a Hybrid Automatic Repeat Request (HARQ) feedback on the physical link feedback channel (PSFCH) resource associated with a new or retransmission on the SL configuration grant, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the configuration grant associated with the SL HARQ process. The associated configuration grant could be, for example, a subsequent configuration grant associated with the SL HARQ process. The associated configuration grant could also be, for example, the next-to-next configuration grant.

[0142] Furthermore, in one embodiment of this disclosure, when the service type is multicast service and the HARQ feedback mode is NACK-only, the method further includes:

[0143] For SL configuration licensed transports with HARQ feedback enabled, if no HARQ feedback is detected on the PSFCH resource associated with the new transfer or retransmission, the SL retransmission timer associated with the SL HARQ process is stopped.

[0144] For example, in one embodiment of this disclosure, for SL configuration authorized transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is NACK-only, in response to no HARQ feedback being detected on the PSFCH resource associated with the new transmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped. The service type is the service type associated with the new transmission.

[0145] For example, in one embodiment of this disclosure, for SL configuration licensed transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is NACK-only, in response to no HARQ feedback being detected on the PSFCH resource associated with the retransmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped. The service type is the service type associated with the retransmission.

[0146] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is NACK-only, in response to the detection of HARQ feedback on the PSFCH resource associated with the new transmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with the new transmission.

[0147] For example, in one embodiment of this disclosure, for SL configuration grant transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is NACK-only, in response to detecting HARQ feedback on the PSFCH resource associated with retransmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant. The service type is the service type associated with the retransmission.

[0148] For example, in one embodiment of this disclosure, the terminal device determines that the SL retransmission timer associated with the SL HARQ process is running, and stops the SL retransmission timer associated with the SL HARQ process.

[0149] Furthermore, in one embodiment of this disclosure, the method further includes:

[0150] For SL configuration grant transmissions with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, in response to the absence of HARQ feedback on the PSFCH resource associated with new transmission or retransmission, if the SL retransmission timer associated with the SL HARQ process is running, automatic retransmission can be performed on the next configuration grant if the SL retransmission timer associated with the SL HARQ process expires.

[0151] For SL configuration authorized transmission with HARQ feedback enabled, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, in response to the absence of HARQ feedback on the PSFCH resource associated with new transmission or retransmission, if the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped.

[0152] Furthermore, in one embodiment of this disclosure, the method further includes:

[0153] In response to the detection of Hybrid Automatic Repeat Request (HARQ) feedback on the physical link feedback channel (PSFCH) resource associated with the new or retransmission on the SL configuration authorization, if the SL retransmission timer associated with the SL HARQ process is running, stop the SL retransmission timer associated with the SL HARQ process.

[0154] For example, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, stopping the SL retransmission timer associated with the SL HARQ process includes at least one of the following:

[0155] When HARQ feedback is ACK, the SL retransmission timer associated with the SL HARQ process is stopped;

[0156] If the HARQ response is NACK, stop the SL retransmission timer associated with the SL HARQ process and perform automatic retransmission on the next configuration authorization.

[0157] For example, in one embodiment of this disclosure, the method further includes:

[0158] If no HARQ feedback is detected on the PSFCH resource associated with new or retransmission, stop the SL retransmission timer associated with the SL HARQ process and perform automatic retransmission on the next configuration authorization.

[0159] For example, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is NACK-only, in response to the detection of Hybrid Automatic Repeat Request (HARQ) feedback on the physical link feedback channel (PSFCH) resource associated with new or retransmission on the SL configuration grant, the SL retransmission timer associated with the SL HARQ process is stopped, including:

[0160] In response to the detection of HARQ feedback on the PSFCH resource associated with new or retransmission under SL configuration authorization, the SL retransmission timer associated with the SLHARQ process is stopped, and automatic retransmission is performed on the next configuration authorization.

[0161] For example, in one embodiment of this disclosure, the method further includes:

[0162] In response to the absence of HARQ feedback on the PSFCH resource associated with new or retransmission, the SL retransmission timer associated with the SL HARQ process is stopped.

[0163] Furthermore, in one embodiment of this disclosure, the method further includes:

[0164] For SL configuration authorization transmissions disabled by HARQ feedback, if the number of configuration authorization transmissions has not reached the maximum number of configuration authorization transmissions, the implementation determines whether to stop the SL retransmission timer associated with the SL HARQ process.

[0165] In one embodiment of this disclosure, implementation may mean that the protocol does not specify, and different manufacturers' terminal devices may have different implementation schemes.

[0166] For example, in one embodiment of this disclosure, the terminal device determines that the SL retransmission timer associated with the SL HARQ process is running, and stops the SL retransmission timer associated with the SL HARQ process.

[0167] For example, in one embodiment of this disclosure, determining whether to stop the SL retransmission timer associated with the SL HARQ process, based on the implementation, includes at least one of the following:

[0168] If the implementation determines that no further retransmission will be performed, stop the SL retransmission timer associated with the SL HARQ process;

[0169] Based on the implementation, it is determined that no further retransmission will be performed, and the SL retransmission timer associated with the SL HARQ process will not be started or restarted.

[0170] For example, in one embodiment of this disclosure, determining that no further retransmission will be performed and therefore the SL retransmission timer associated with the SL HARQ process will not be started or restarted, could be, for example, determining that the last retransmission was successful and no further retransmission will be performed, and therefore the SL retransmission timer associated with the SL HARQ process will not be started or restarted. Determining that the last retransmission was successful could be, for example, not receiving LBT failure indication information from the physical layer.

[0171] For example, in one embodiment of this disclosure, determining that no further retransmission will be performed and that the SL retransmission timer associated with the SL HARQ process will not be started or restarted, could be, for instance, determining that an LBT failure indication message was received from the physical layer for the last retransmission and that no further retransmission will be performed, and therefore, the SL retransmission timer associated with the SL HARQ process will not be started or restarted. The LBT failure indication message received from the physical layer could, for example, be used to indicate that the transmission failed due to an LBT failure.

[0172] Furthermore, in one embodiment of this disclosure, the method further includes:

[0173] Receive control information sent by network devices, wherein the control information is used to instruct at least one of scheduling-side crosslink new transmission or crosslink retransmission;

[0174] In response to the received control information, stop the SL retransmission timer associated with the SL HARQ process.

[0175] In one embodiment of this disclosure, the control information may be, for example, downlink control information (DCI).

[0176] For example, in one embodiment of this disclosure, the terminal device receives a DCI sent by the network device, and the DCI is used to schedule the SL HARQ process (the SL HARQ process associated with the SL MAC PDU) to perform new transmission or retransmission. The terminal device can stop the SL retransmission timer associated with the SL HARQ process. For example, when the SL retransmission timer associated with the SL HARQ process is running, the terminal device can stop the SL retransmission timer associated with the SL HARQ process.

[0177] For example, in one embodiment of this disclosure, DCI may be used to indicate the transmission resources corresponding to a new transmission or retransmission.

[0178] Furthermore, in one embodiment of this disclosure, in response to received control information, stopping the SL retransmission timer associated with the SL HARQ process includes:

[0179] Based on the HARQ process identifier carried in the control information, determine the SL HARQ process associated with the HARQ process identifier;

[0180] Stop the SL retransmission timer associated with the SL HARQ process.

[0181] For example, in one embodiment of this disclosure, the SL HARQ process associated with the HARQ process identifier is determined based on the HARQ process identifier carried by the downlink control information DCI.

[0182] Stop the SL retransmission timer associated with the SL HARQ process.

[0183] For example, in one embodiment of this disclosure, a HARQ process identifier can be used to identify a HARQ process. Different HARQ processes can correspond to different HARQ process identifiers. For instance, in response to the HARQ process identifier carried in the DCI, the SL HARQ process associated with the HARQ process identifier is determined, and the SL retransmission timer associated with the SL HARQ process is stopped.

[0184] Furthermore, in one embodiment of this disclosure, the method further includes:

[0185] In response to the determination that the configured authorized transmission count has reached the configured maximum authorized transmission count, the SL retransmission timer associated with the SL HARQ process is stopped.

[0186] In response to the determination that the configured authorized transmission count has reached the configured maximum transmission count, and the SL retransmission timer associated with the SL HARQ process is running, the SL retransmission timer associated with the SL HARQ process is stopped.

[0187] For example, in one embodiment of this disclosure, stopping the SL retransmission timer associated with the SL HARQ process in response to determining that the configured authorized transmission count has reached the configured authorized maximum transmission count includes:

[0188] In response to the determination that the configured authorized transmission count has reached the maximum configured authorized transmission count, the SL retransmission timer associated with the SL HARQ process will not be started or restarted during the last retransmission opportunity.

[0189] For example, in one embodiment of this disclosure, the SL retransmission timer associated with the SLHARQ process is not started or restarted during the last retransmission opportunity, including:

[0190] In response to a successful last retransmission, the SL retransmission timer associated with the SL HARQ process is not started or restarted.

[0191] In response to receiving an LBT failure indication message for the last retransmission, the SL retransmission timer associated with the SL HARQ process is not started or restarted.

[0192] For example, in one embodiment of this disclosure, the response to a successful last retransmission could be, for example, the response to not receiving an LBT failure indication from the physical layer. Received LBT failure indication information from the physical layer could, for example, be used to indicate that the transmission failed due to an LBT failure.

[0193] For example, in one embodiment of this disclosure, in response to receiving an LBT failure indication message for the last retransmission, the SL retransmission timer associated with the SL HARQ process is not started or restarted, and in response to receiving an LBT failure indication message from the physical layer for the last retransmission, the SL retransmission timer associated with the SL HARQ process is not started or restarted.

[0194] Furthermore, in one embodiment of this disclosure, the method further includes at least one of the following:

[0195] The terminal device is in the Radio Resource Control (RRC) connected state and obtains the SL retransmission timer configuration through dedicated signaling.

[0196] The terminal device is in at least one of the RRC Idle state (RRC IDLE) and RRC Inactive state (RRC INACTIVE), and obtains the SL retransmission timer configuration through the system message block SIB;

[0197] When the terminal device is in an out-of-coverage (OOC) area, it obtains the SL retransmission timer configuration through pre-configuration.

[0198] For example, in one embodiment of this disclosure, the terminal device is in a Radio Resource Control (RRC) connected state and can obtain the SL retransmission timer configuration through dedicated signaling.

[0199] For example, in one embodiment of this disclosure, the terminal device is in at least one of an RRC idle state and an RRC inactive state, and can obtain the SL retransmission timer configuration through the system message block SIB.

[0200] For example, in one embodiment of this disclosure, the terminal device is in an RRC idle state and can obtain the SL retransmission timer configuration through the system message block SIB.

[0201] For example, in one embodiment of this disclosure, the terminal device is in an RRC inactive state and can obtain the SL retransmission timer configuration through the system message block SIB.

[0202] For example, in one embodiment of this disclosure, if the terminal device is in an uncovered area (OOC), the SL retransmission timer configuration can be obtained through pre-configuration.

[0203] In one embodiment of this disclosure, the dedicated signaling may be sent from a network device to a terminal device. This dedicated signaling may, for example, carry an SL retransmission timer configuration.

[0204] In one embodiment of this disclosure, the System Message Block (SIB) may be sent from a network device to a terminal device. The SIB may, for example, carry an SL retransmission timer configuration.

[0205] In one embodiment of this disclosure, the pre-configuration may be pre-configured in the terminal device.

[0206] Furthermore, in one embodiment of this disclosure, the method further includes at least one of the following:

[0207] In response to the terminal device being in the Radio Resource Control (RRC) connected state, the SL retransmission timer configuration is obtained through dedicated signaling;

[0208] In response to the terminal device being in at least one of the RRC Idle state (RRC IDLE) and RRC Inactive state (RRC INACTIVE), the SL retransmission timer configuration is obtained through the system message block SIB;

[0209] In response to the terminal device being in an out-of-coverage (OOC) area, the SL retransmission timer configuration is obtained through pre-configuration.

[0210] For example, in one embodiment of this disclosure, in response to the terminal device being in the Radio Resource Control (RRC) connected state, the SL retransmission timer configuration can be obtained through dedicated signaling.

[0211] For example, in one embodiment of this disclosure, in response to the terminal device being in at least one of an RRC idle state (RRCIDLE) and an RRC inactive state (RRC INACTIVE), the SL retransmission timer configuration can be obtained through the system message block SIB.

[0212] For example, in one embodiment of this disclosure, in response to the terminal device being in an RRC idle state, the SL retransmission timer configuration can be obtained through the system message block SIB.

[0213] For example, in one embodiment of this disclosure, in response to the terminal device being in an RRC inactive state, the SL retransmission timer configuration can be obtained through the system message block SIB.

[0214] For example, in one embodiment of this disclosure, in response to the terminal device being in an uncovered area (OOC), the SL retransmission timer configuration can be obtained through pre-configuration.

[0215] Furthermore, in one embodiment of this disclosure, the method further includes at least one of the following:

[0216] When the terminal device is in the Radio Resource Control (RRC) connected state, the SL retransmission timer configuration is obtained through dedicated signaling.

[0217] When the terminal device is in at least one of the RRC Idle state (RRC IDLE) and RRC Inactive state (RRC INACTIVE), the SL retransmission timer configuration is obtained through the system message block SIB;

[0218] When the terminal device is in an out-of-coverage (OOC) area, the SL retransmission timer configuration is obtained through pre-configuration.

[0219] For example, in one embodiment of this disclosure, when the terminal device is in the Radio Resource Control (RRC) connected state, the SL retransmission timer configuration can be obtained through dedicated signaling.

[0220] For example, in one embodiment of this disclosure, when the terminal device is in at least one of the RRC Idle state and the RRC Inactive state, the SL retransmission timer configuration can be obtained through the System Message Block (SIB).

[0221] For example, in one embodiment of this disclosure, when the terminal device is in an RRC idle state, the SL retransmission timer configuration can be obtained through the system message block SIB.

[0222] For example, in one embodiment of this disclosure, when the terminal device is in an inactive RRC state, the SL retransmission timer configuration can be obtained through the system message block SIB.

[0223] For example, in one embodiment of this disclosure, when the terminal device is in an out-of-coverage area (OOC), the SL retransmission timer configuration can be obtained through pre-configuration.

[0224] The embodiments or examples disclosed herein are not exhaustive, but merely illustrative of some embodiments or examples, and are not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment or example can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment or example can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment or example can be arbitrarily interchanged. Furthermore, optional methods or examples in a particular embodiment or example can be arbitrarily combined; moreover, embodiments or examples can be arbitrarily combined. For example, some or all steps of different embodiments or examples can be arbitrarily combined, and a particular embodiment or example can be arbitrarily combined with optional methods or examples of other embodiments or examples.

[0225] In some implementations or embodiments, terms such as “in response to…”, “in the case of…”, “when…”, “when…”, “if…”, etc. in this disclosure can be replaced with each other.

[0226] In some implementations or embodiments, the notation "A or B", "A and / or B", "at least one of A and B", "A in one case, B in another case", "in response to one case A, in response to another case B", etc., may include at least one of the following technical solutions depending on the circumstances: executing A regardless of B, that is, A in some implementations or embodiments; executing B regardless of A, that is, B in some implementations or embodiments; selectively executing A and B, that is, selecting to execute from A and B in some implementations or embodiments; executing both A and B, that is, A and B in some implementations or embodiments.

[0227] In some implementations or embodiments, the terms "including A", "containing A", "for indicating A", and "carrying A" in this disclosure can be interpreted as directly carrying A or indirectly indicating A.

[0228] Furthermore, each element, each row, or each column in the tables involved in this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0229] In summary, in the embodiments of this disclosure, the automatic retransmission of the terminal device is determined by at least one of the following pieces of information: the sidelink SL retransmission timer; and the maximum number of authorized transmissions. In the embodiments of this disclosure, an automatic retransmission mechanism on the Sidelink configuration authorization can be provided, reducing the situation where the automatic retransmission mechanism is unclear due to Sidelink's enhanced support for unlicensed spectrum, thereby improving the accuracy of automatic retransmission and data transmission. This disclosure provides a processing method for an "automatic retransmission" scenario, providing a mechanism for determining automatic retransmission on the Sidelink configuration authorization, which can solve the situation where the automatic retransmission mechanism is unclear and improve the accuracy of automatic retransmission. Second, by ensuring that the SL retransmission timer associated with the SLHARQ process is running, automatic retransmission is not performed on the configuration authorization, which can improve the accuracy of automatic retransmission and data transmission. Third, by determining whether to restart or start the SL retransmission timer based on whether the retransmission or new transmission is successful, the accuracy of starting or restarting the SL retransmission timer can be improved. Fourth, by detecting HARQ feedback on the PSFCH resource associated with new or retransmission on the SL configuration authorization, stopping the SL retransmission timer associated with the SL HARQ process can improve the accuracy of stopping the SL retransmission timer and thus the accuracy of automatic transmission. Fifth, by determining whether to stop the SL retransmission timer associated with the SL HARQ process based on the implementation when the configured authorized transmission count has not reached the maximum configured authorized transmission count, the accuracy of stopping the SL retransmission timer can be improved. Sixth, by responding to control information sent by the network device, the SL retransmission timer associated with the SL HARQ process can be stopped, further improving the accuracy of stopping the SL retransmission timer. Seventh, by stopping the SL retransmission timer associated with the SL HARQ process in response to the determination that the configured authorized transmission count has reached the maximum configured authorized transmission count, the accuracy of stopping the SL retransmission timer can be improved.

[0230] Figure 4 This is a flowchart illustrating an automatic retransmission method provided in an embodiment of this disclosure. The method is executed by a terminal device, such as... Figure 4 As shown, the method may include the following steps:

[0231] Step 401: Receive dedicated signaling sent by the network device, wherein the dedicated signaling carries the SL retransmission timer configuration;

[0232] Step 402: Receive the System Message Block (SIB) sent by the network device, wherein the System Message Block (SIB) carries the SL retransmission timer configuration.

[0233] In one embodiment of this disclosure, the description of steps 401-402 can be found in the description of step S301, and this embodiment is not limited thereto. The optional examples in this embodiment can be arbitrarily combined, and without contradiction, this embodiment can be combined with steps from other embodiments and optional examples from other embodiments.

[0234] It should be noted that, in the embodiments of this disclosure, the terminal device may execute at least one of steps 401 and 402, and may include at least one of the following schemes depending on the situation: executing step 402 independently of step 401, that is, executing step 402 in some embodiments; executing step 401 independently of executing step 402, that is, executing step 401 in some embodiments; selectively executing steps 401 and 402, that is, selecting to execute from executing step 401 and executing step 402 in some embodiments; executing both steps 401 and 402, that is, executing steps 401 and 402 in some embodiments.

[0235] Figure 5 This is a flowchart illustrating an automatic retransmission method provided in an embodiment of this disclosure. The method is executed by a terminal device, such as... Figure 5 As shown, the method may include the following steps:

[0236] Step 501: Receive control information sent by the network device, wherein the control information carries a HARQ process identifier;

[0237] Step 502: Determine the SLHARQ process associated with the HARQ process identifier based on the HARQ process identifier carried in the control information.

[0238] In one embodiment of this disclosure, the description of steps 501-502 can be found in the description of step S301, and this embodiment is not limited thereto. The optional examples in this embodiment can be arbitrarily combined, and without contradiction, this embodiment can be combined with steps from other embodiments and optional examples from other embodiments.

[0239] Figure 6 This is a flowchart illustrating an automatic retransmission method provided in an embodiment of this disclosure. The method is executed by a network device, such as... Figure 6 As shown, the method may include the following steps:

[0240] Step 601: Send at least one of the following messages to the terminal device:

[0241] Side link SL retransmission timer;

[0242] Configure the maximum number of authorized transfers.

[0243] Furthermore, in one embodiment of this disclosure, the method further includes:

[0244] Send control information to the terminal device, wherein the control information is used to instruct at least one of the following: a new transmission on the scheduling side or a retransmission on the scheduling side.

[0245] For example, in one embodiment of this disclosure, control information is sent to a terminal device, wherein the control information includes a HARQ process identifier.

[0246] In one embodiment of this disclosure, the network device may send proprietary signaling to the terminal device. This proprietary signaling may, for example, carry an SL retransmission timer configuration. The terminal device can obtain the SL retransmission timer configuration through the proprietary signaling.

[0247] In one embodiment of this disclosure, the network device may send a System Message Block (SIB) to the terminal device. The SIB may carry, for example, an SL retransmission timer configuration. The terminal device can obtain the SL retransmission timer configuration through the SIB.

[0248] In one embodiment of this disclosure, the description of step 401 can be found in the description of step S301, and this disclosure does not limit the scope of the embodiment. The optional examples in this disclosure can be arbitrarily combined, and without contradiction, this disclosure can be combined with steps from other embodiments and optional examples from other embodiments.

[0249] Figure 7 This is an interactive schematic diagram of an automatic retransmission method provided in an embodiment of the present disclosure, as shown below. Figure 5 As shown, the method may include the following steps:

[0250] Step 701: The network device sends at least one of the following information to the terminal device:

[0251] Side link SL retransmission timer;

[0252] Configure the maximum number of authorized transfers;

[0253] Step 702: The terminal device receives at least one type of information sent by the network device;

[0254] Step 703: Based on the received information, the terminal device determines the automatic retransmission of the terminal device.

[0255] In one embodiment of this disclosure, the description of step 701 can be referenced to the description of step 601 above, and the descriptions of steps 702-703 can be referenced to the description of step 301 above. This embodiment is not limited herein. The optional examples in this embodiment can be arbitrarily combined, and without contradiction, this embodiment can be combined with steps from other embodiments and optional examples from other embodiments.

[0256] Figure 8 This is a schematic diagram of the structure of an automatic retransmission system provided in an embodiment of this disclosure, as shown below. Figure 8 As shown, the system may include the following steps:

[0257] Network devices are used to send at least one of the following types of information to terminal devices:

[0258] Side link SL retransmission timer;

[0259] Configure the maximum number of authorized transfers;

[0260] A terminal device for receiving at least one type of information sent by a network device;

[0261] The terminal device is also used to determine automatic retransmission of the terminal device based on at least one type of information received.

[0262] In one embodiment of this disclosure, the network device is further configured to send control information to the terminal device, wherein the control information is used to instruct at least one of scheduling-side crosslink new transmission or crosslink retransmission;

[0263] Terminal devices are also used to receive control information sent by network devices;

[0264] The terminal device is also used to stop the SL retransmission timer associated with the SL HARQ process in response to received control information.

[0265] In one embodiment of this disclosure, the network device is further configured to send downlink control information (DCI) to the terminal device, wherein the DCI is used to indicate at least one of scheduling-side downlink new transmission or scheduling-side downlink retransmission.

[0266] The terminal equipment is also used to receive DCI sent by the network equipment;

[0267] The terminal device is also used to stop the SL retransmission timer associated with the SL HARQ process in response to the received DCI.

[0268] In one embodiment of this disclosure, the system description of this embodiment can be referred to the description of step 301 above, and this embodiment is not limited thereto. The optional examples in this embodiment can be arbitrarily combined, and without contradiction, this embodiment can be combined with steps of other embodiments and optional examples of other embodiments.

[0269] For example, in one embodiment of this disclosure, automatic retransmission of the terminal device is controlled by using an SL retransmission timer and configuring a maximum authorized number of transmissions.

[0270] Optionally, in one embodiment of this disclosure, a sidelink (SL) configuration grant retransmission timer (slcg-retransmissiontimer) can be defined. This timer can be configured per user equipment (UE), per configured grant (CG), per resource pool, per bandwidth part (BWP), and per resource block set (RB set). Terminal devices in Radio Resource Control (RRC) connected state can obtain the SL retransmission timer configuration via dedicated signaling. Terminal devices in RRC idle or RRC inactive state can obtain the SL retransmission timer configuration via System Message Block (SIB). Terminal devices in out-of-coverage (OOC) areas can obtain the SL retransmission timer configuration through pre-configuration. This SL retransmission timer is maintained per SL process.

[0271] Optionally, in one embodiment of this disclosure, if the terminal device successfully transmits or retransmits (without receiving a Listen Before Talk (LBT) failure indication from the physical layer), the terminal device starts or restarts the SL retransmission timer associated with the SL process. If the terminal device's new transmission or retransmission fails due to LBT failure (receiving an LBT failure indication from the physical layer), the terminal device may not start or restart the SL retransmission timer associated with the SL process and may perform automatic transmission or automatic retransmission on the next configuration authorization. If the terminal device cannot perform automatic retransmission on the configuration authorization while the SL retransmission timer associated with the SL process is running, and the SL retransmission timer associated with the SL process times out, the terminal device considers this a negative acknowledgement (NACK) and may perform automatic retransmission on the next configuration authorization.

[0272] Optionally, in one embodiment of this disclosure, if the terminal device detects a Hybrid Automatic Repeat Request (HARQ) feedback on the Physical Side Link Feedback Channel (PSFCH) resource associated with the configuration authorization, it can stop the SL retransmission timer associated with the SL process.

[0273] Optionally, in one embodiment of this disclosure, for a HARQ-enabled Media Access Control (MAC) Packet Data Unit (PDU), if the transmitting terminal detects a HARQ feedback sent by the receiving terminal on the PSFCH resource associated with the configuration grant (the configuration grant for transmitting the SL MAC PDU), the transmitting terminal can stop the SL retransmission timer associated with the SL process (the SL process associated with the SL MAC PDU). For unicast and multicast ACK-NACK feedback modes, if an ACK is detected, the terminal device can stop the SL retransmission timer associated with the SL process (if the SL retransmission timer associated with the SL process is running). If a NACK is detected (NACK received on the PSFCH or no HARQ feedback detected on the PSFCH), the terminal device can stop the SL retransmission timer associated with the SL process (if the SL retransmission timer associated with the SL process is running) and perform automatic retransmission on the next configuration grant. For multicast NACK-only mode, if no HARQ feedback is detected on the PSFCH, the terminal device can stop the SL retransmission timer associated with the SL process (if the SL retransmission timer associated with the SL process is running).

[0274] Optionally, in one embodiment of this disclosure, for a HARQ-disabled MAC PDU, before reaching the maximum number of transmissions, the terminal device can determine, based on its implementation, when to stop the SL retransmission timer associated with the SL process (if the SL retransmission timer associated with the SL process is running). One possible implementation is that, if the terminal device determines, based on its implementation, that it will not perform another retransmission, it can stop the SL retransmission timer associated with the SL process (if the SL retransmission timer associated with the SL process is running). If the terminal device determines that the last retransmission was successful and that it will not perform another retransmission (no LBT failure indication received from the physical layer), it may not start or restart the SL retransmission timer associated with the SL process; if the terminal device determines that the last retransmission failed due to an LBT failure and that it will not perform another retransmission (no LBT failure indication received from the physical layer), it may not start or restart the SL retransmission timer associated with the SL process.

[0275] Optionally, in one embodiment of this disclosure, the terminal device may stop the SL retransmission timer associated with the SL process when it receives a new or retransmission scheduled by the network device.

[0276] Optionally, in one embodiment of this disclosure, when the transmitting terminal device receives a DCI from the network device to schedule the HARQ process (the HARQ process associated with the SL MAC PDU) to perform new transmission or retransmission, the terminal device may stop the SL retransmission timer associated with the SL process (associated with the HARQ process) (if the SL retransmission timer associated with the SL process is running).

[0277] Optionally, in one embodiment of this disclosure, if the terminal device determines that the configured authorized transmission has reached the maximum number of transmissions, the terminal device may stop the SL retransmission timer associated with the SL process.

[0278] Optionally, in one embodiment of this disclosure, if the terminal device determines that the configured authorized transmission has reached the maximum number of transmissions, and if the SL retransmission timer associated with the SL process is running, the terminal device may stop the SL retransmission timer associated with the SL process.

[0279] Optionally, in one embodiment of this disclosure, if the terminal device determines that the configuration authorization has reached the maximum number of transmissions, the terminal device may choose not to start or restart the SL retransmission timer associated with the SL process during the last retransmission opportunity.

[0280] Optionally, in one embodiment of this disclosure, if the terminal device determines that the last retransmission was successful (no LBT failure indication was received from the physical layer), it may not start or restart the SL retransmission timer associated with the SL process; if the terminal device determines that the last retransmission failed due to LBT failure (LBT failure indication was received from the physical layer), it may not start or restart the SL retransmission timer associated with the SL process.

[0281] Figure 9 This is a schematic diagram of the structure of a communication device provided in an embodiment of this disclosure, as shown below. Figure 9 As shown, the communication device 900 may include:

[0282] The determination module 901 is used to determine the automatic retransmission of the terminal device based on at least one of the following information:

[0283] Side link SL retransmission timer;

[0284] Configure the maximum number of authorized transfers.

[0285] In summary, in the automatic retransmission apparatus of this disclosure embodiment, the determining module 901 is used to determine the automatic retransmission of the terminal device through at least one of the following information: the sidelink SL retransmission timer; and the configured maximum number of authorized transmissions. In this disclosure embodiment, an automatic retransmission mechanism on Sidelink configuration authorization can be provided, reducing the situation where the automatic retransmission mechanism is unclear due to Sidelink's enhanced support for unlicensed spectrum, thereby improving the accuracy of automatic retransmission and data transmission. This disclosure provides a processing apparatus for an "automatic retransmission" scenario, providing a determination mechanism for automatic retransmission on Sidelink configuration authorization, which can solve the problem of unclear automatic retransmission mechanisms and improve the accuracy of automatic retransmission.

[0286] Optionally, in one embodiment of this disclosure, the determining module 901 is used to determine the automatic retransmission of the terminal device, including at least one of the following:

[0287] In response to the successful transmission of a new data transfer upon successful SL configuration authorization, the SL retransmission timer associated with the corresponding SL HARQ process is started.

[0288] In response to successful retransmission of SL configuration authorization, restart the SL retransmission timer associated with the SL HARQ process;

[0289] In response to a failure indication message for receiving a Listen Before Talk (LBT) message in the new transmission, the SL retransmission timer associated with the SL HARQ process is not started, and automatic transmission is performed on the next configuration authorization.

[0290] In response to receiving an LBT failure indication message for retransmission, the SL retransmission timer associated with the SL HARQ process is not restarted, and automatic retransmission is performed on the next configuration authorization.

[0291] Optionally, in one embodiment of this disclosure, the determining module 901 is further configured to:

[0292] The SL retransmission timer associated with the SL HARQ process is running, and automatic retransmission is not configured in the authorization settings.

[0293] If the SL retransmission timer associated with the SL HARQ process times out or stops, automatic retransmission will be performed on the next configuration authorization.

[0294] Optionally, in one embodiment of this disclosure, the determining module 901 is further configured to:

[0295] For SL configuration grant transmissions with HARQ feedback enabled, in response to the detection of Hybrid Automatic Repeat Request (HARQ) feedback on the physical link feedback channel (PSFCH) resource associated with new or retransmissions on the SL configuration grant, the SL retransmission timer associated with the SL HARQ process is stopped.

[0296] Optionally, in one embodiment of this disclosure, when the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, the determining module 901 stops the SL retransmission timer associated with the SLHARQ process, specifically for at least one of the following:

[0297] When HARQ feedback is ACK, the SL retransmission timer associated with the SL HARQ process is stopped;

[0298] If the HARQ response is NACK, stop the SL retransmission timer associated with the SL HARQ process and perform automatic retransmission on the next configuration authorization.

[0299] Optionally, in one embodiment of this disclosure, the determining module 901 is further configured to:

[0300] For SL configuration license transmissions with HARQ feedback enabled, if no HARQ feedback is detected on the PSFCH resource associated with the new or retransmission, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration license.

[0301] Optionally, in one embodiment of this disclosure, when the service type is multicast service and the HARQ feedback mode is NACK-only, the determining module 901 is further configured to:

[0302] For SL configuration authorized transmissions with HARQ feedback enabled, if no HARQ feedback is detected on the PSFCH resource associated with the new or retransmission, the SL retransmission timer associated with the SL HARQ process is stopped.

[0303] For SL configuration grant transmissions with HARQ feedback enabled, in response to the detection of HARQ feedback on the PSFCH resource associated with the new or retransmission, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant.

[0304] Optionally, in one embodiment of this disclosure, the determining module 901 is further configured to:

[0305] For SL configuration authorization transmissions disabled by HARQ feedback, if the number of configuration authorization transmissions has not reached the maximum number of configuration authorization transmissions, the implementation determines whether to stop the SL retransmission timer associated with the SL HARQ process.

[0306] Optionally, in one embodiment of this disclosure, the determining module 901 is configured to determine, based on the implementation, whether to stop the SL retransmission timer associated with the SL HARQ process, specifically for at least one of the following:

[0307] If the implementation determines that no further retransmission will be performed, stop the SL retransmission timer associated with the SL HARQ process;

[0308] Based on the implementation, it is determined that no further retransmission will be performed, and the SL retransmission timer associated with the SL HARQ process will not be started or restarted.

[0309] Optionally, in one embodiment of this disclosure, the determining module 901 is further configured to:

[0310] Receive control information sent by network devices, wherein the control information is used to instruct at least one of scheduling-side crosslink new transmission or crosslink retransmission;

[0311] In response to the received control information, stop the SL retransmission timer associated with the SL HARQ process.

[0312] Optionally, in one embodiment of this disclosure, the determining module 901, in response to receiving control information and stopping the SL retransmission timer associated with the SL HARQ process, is specifically configured to:

[0313] Based on the HARQ process identifier carried in the control information, determine the SL HARQ process associated with the HARQ process identifier;

[0314] Stop the SL retransmission timer associated with the SL HARQ process.

[0315] Optionally, in one embodiment of this disclosure, the determining module 901 is further configured to:

[0316] In response to the determination that the configured authorized transmission count has reached the configured maximum authorized transmission count, the SL retransmission timer associated with the SL HARQ process is stopped.

[0317] Optionally, in one embodiment of this disclosure, the determining module 901 is configured to stop the SL retransmission timer associated with the SL HARQ process in response to determining that the configured authorized transmission count has reached the configured authorized maximum transmission count. Specifically, it is configured to:

[0318] In response to the determination that the configured authorized transmission count has reached the maximum configured authorized transmission count, the SL retransmission timer associated with the SL HARQ process will not be started or restarted during the last retransmission opportunity.

[0319] Optionally, in one embodiment of this disclosure, the determining module 901 is specifically configured to: When the SL retransmission timer associated with the SL HARQ process is not started or restarted during the last retransmission opportunity, it is specifically configured to:

[0320] In response to a successful last retransmission, the SL retransmission timer associated with the SL HARQ process is not started or restarted.

[0321] In response to receiving an LBT failure indication message for the last retransmission, the SL retransmission timer associated with the SL HARQ process is not started or restarted.

[0322] Optionally, in one embodiment of this disclosure, the determining module 901 is further used for at least one of the following:

[0323] The terminal device is in the Radio Resource Control (RRC) connected state and obtains the SL retransmission timer configuration through dedicated signaling.

[0324] The terminal device is in at least one of the RRC idle state and the RRC inactive state, and obtains the SL retransmission timer configuration through the system message block SIB.

[0325] When the terminal device is in an uncovered area (OOC), the SL retransmission timer configuration is obtained through pre-configuration.

[0326] Figure 10 This is a schematic diagram of the structure of a network device provided in an embodiment of the present disclosure, such as... Figure 10 As shown, the network device 1000 may include:

[0327] The sending module 1001 is used to send at least one of the following information to the terminal device:

[0328] Side link SL retransmission timer;

[0329] Configure the maximum number of authorized transfers.

[0330] Optionally, in one embodiment of this disclosure, the sending module 1001 is further configured to send control information to the terminal device, wherein the control information is used to instruct at least one of scheduling-side link new transmission or side link retransmission.

[0331] Optionally, in one embodiment of this disclosure, the control information carries a HARQ process identifier.

[0332] Optionally, in one embodiment of this disclosure, the sending module 1001 is further configured to include at least one of the following:

[0333] Send dedicated signaling to the terminal device, wherein the dedicated signaling carries the SL retransmission timer configuration;

[0334] Send a System Message Block (SIB) to the terminal device, wherein the SIB carries the SL retransmission timer configuration.

[0335] Figure 11 This is a block diagram of a terminal device 1100 provided in one embodiment of this disclosure. The terminal device 1100 may be, for example, a user equipment 1100 (UE). For instance, the UE 1100 may be a mobile phone, computer, digital broadcasting terminal device, messaging transceiver, game console, tablet device, medical device, fitness device, personal digital assistant, etc.

[0336] Reference Figure 11 UE1100 may include at least one of the following components: processing component 1102, memory 1104, power supply component 1106, multimedia component 1108, audio component 1110, input / output (I / O) interface 1112, sensor component 1114, and communication component 1116.

[0337] Processing component 1102 typically controls the overall operation of UE 1100, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 1102 may include at least one processor 1120 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 1102 may include at least one module to facilitate interaction between processing component 1102 and other components. For example, processing component 1102 may include a multimedia module to facilitate interaction between multimedia component 1108 and processing component 1102.

[0338] Memory 1104 is configured to store various types of data to support the operation of UE 1100. Examples of this data include instructions for any application or method operating on UE 1100, contact data, phonebook data, messages, pictures, videos, etc. Memory 1104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0339] Power supply component 1106 provides power to various components of UE1100. Power supply component 1106 may include a power management system, at least one power supply, and other components associated with generating, managing, and distributing power to UE1100.

[0340] The multimedia component 1108 includes a screen that provides an output interface between the UE 1100 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes at least one touch sensor to sense touch, swipe, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or swipe action but also detect the wake-up time and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 1108 includes a front-facing camera and / or a rear-facing camera. When the UE 1100 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0341] Audio component 1110 is configured to output and / or input audio signals. For example, audio component 1110 includes a microphone (MIC) configured to receive external audio signals when UE 1100 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 1104 or transmitted via communication component 1116. In some embodiments, audio component 1110 also includes a speaker for outputting audio signals.

[0342] I / O interface 1112 provides an interface between processing component 1102 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0343] Sensor assembly 1114 includes at least one sensor for providing status assessment of various aspects of UE 1100. For example, sensor assembly 1114 can detect the on / off state of device 1100, the relative positioning of components, such as the display and keypad of UE 1100, changes in position of UE 1100 or one of its components, the presence or absence of user contact with UE 1100, orientation or acceleration / deceleration of UE 1100, and temperature changes of UE 1100. Sensor assembly 1114 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 1114 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 1114 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0344] Communication component 1116 is configured to facilitate wired or wireless communication between UE 1100 and other devices. UE 1100 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 1116 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 1116 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0345] In an exemplary embodiment, UE1100 may be implemented by at least one application-specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field-programmable gate array (FPGA), controller, microcontroller, microprocessor or other electronic component to perform the above method.

[0346] Figure 12 This is a block diagram of a network device 1200 provided in an embodiment of this disclosure. For example, network device 1200 can be provided as a network device. See also... Figure 12The network device 1200 includes a processing component 1222, which further includes at least one processor, and memory resources represented by memory 1232 for storing instructions, such as application programs, that can be executed by the processing component 1222. The application programs stored in memory 1232 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 1222 is configured to execute instructions to perform any of the methods described above applied to the network device, such as... Figure 6 The method shown.

[0347] Network device 1200 may also include a power supply component 1226 configured to perform power management of network device 1200, a wired or wireless network interface 1250 configured to connect network device 1200 to a network, and an input / output (I / O) interface 1258. Network device 1200 can operate on an operating system stored in memory 1232, such as Windows Server™, Mac OS X™, Unix™, Linux™, Free BSD™, or similar.

[0348] In the embodiments provided above, the methods provided by the present disclosure have been described from the perspectives of network devices and UEs, respectively. To implement the functions of the methods provided in the embodiments of the present disclosure, the network device and the UE may include hardware structures and software modules, implementing the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. One of the above functions can be executed in the form of hardware structures, software modules, or a combination of hardware structures and software modules.

[0349] This disclosure provides a communication device. The communication device may include a transceiver module and a processing module. The transceiver module may include a sending module and / or a receiving module. The sending module is used to implement the sending function, and the receiving module is used to implement the receiving function. The transceiver module can implement both sending and / or receiving functions.

[0350] The communication device can be a terminal device (such as the terminal device in the aforementioned method embodiments), a device within a terminal device, or a device that can be used in conjunction with a terminal device. Alternatively, the communication device can be a network device, a device within a network device, or a device that can be used in conjunction with a network device.

[0351] This disclosure provides another communication device. The communication device can be a network device, a terminal device (such as the terminal device in the foregoing method embodiments), a chip, chip system, or processor that supports the implementation of the above methods in a network device, or a chip, chip system, or processor that supports the implementation of the above methods in a terminal device. This device can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0352] Communication equipment may include one or more processors. The processor can be a general-purpose processor or a dedicated processor. For example, it can be a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control the communication equipment (e.g., network equipment, baseband chip, terminal equipment, terminal equipment chip, DU or CU, etc.), execute computer programs, and process the data of the computer programs.

[0353] Optionally, the communication device may further include one or more memories, on which computer programs may be stored. The processor executes the computer programs to cause the communication device to perform the methods described in the above method embodiments. Optionally, the memories may also store data. The communication device and the memories may be configured separately or integrated together.

[0354] Optionally, the communication equipment may also include a transceiver and an antenna. A transceiver, also known as a transceiver unit, transceiver, or transceiver circuit, is used to implement transmission and reception functions. A transceiver may include a receiver and a transmitter. The receiver, also known as a receiver circuit, is used to implement the receiving function; the transmitter, also known as a transmitter or transmitting circuit, is used to implement the transmitting function.

[0355] Optionally, the communication device may further include one or more interface circuits. The interface circuits are used to receive code instructions and transmit them to the processor. The processor executes the code instructions to cause the communication device to perform the methods described in the above method embodiments.

[0356] The communication equipment is a terminal device: the processor is used to execute... Figure 3 The method shown.

[0357] The communication equipment is a network device: the processor is used to execute... Figure 6 The method shown.

[0358] In one implementation, the processor may include a transceiver for implementing receive and transmit functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receive and transmit functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit can be used for reading and writing code / data, or it can be used for transmitting or relaying signals.

[0359] In one implementation, the processor may store a computer program that runs on the processor, causing the communication device to perform the methods described in the above method embodiments. The computer program may be embedded in the processor; in this case, the processor may be implemented in hardware.

[0360] In one implementation, the communication device may include circuitry capable of performing the transmitting, receiving, or communication functions described in the foregoing method embodiments. The processor and transceiver described in this disclosure can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal-oxide-semiconductor (CMOS), n-metal-oxide-semiconductor (NMOS), positive-channel metal-oxide-semiconductor (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon-germanium (SiGe), gallium arsenide (GaAs), etc.

[0361] The communication device described in the above embodiments can be a network device or a terminal device (such as the terminal device in the foregoing method embodiments), but the scope of the communication device described in this disclosure is not limited thereto, and the structure of the communication device is not limited. The communication device can be a standalone device or part of a larger device. For example, the communication device can be:

[0362] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0363] (2) A collection of one or more ICs, optionally including storage components for storing data and computer programs;

[0364] (3) ASIC, such as modem;

[0365] (4) Modules that can be embedded in other devices;

[0366] (5) Receivers, terminal equipment, smart terminal equipment, cellular phones, wireless equipment, handheld devices, mobile units, vehicle-mounted equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.

[0367] (6) Others, etc.

[0368] In the case where the communication device can be a chip or a chip system, the chip includes a processor and an interface. There can be one or more processors, and multiple interfaces.

[0369] Optionally, the chip also includes a memory for storing necessary computer programs and data.

[0370] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this disclosure can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented in hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the described functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this disclosure.

[0371] This disclosure also provides a readable storage medium having instructions stored thereon that, when executed by a computer, implement the functions of any of the above method embodiments.

[0372] This disclosure also provides a computer program product that, when executed by a computer, implements the functions of any of the above method embodiments.

[0373] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program can be transferred from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0374] Those skilled in the art will understand that the various numerical designations such as "first," "second," etc., used in this disclosure are merely for the convenience of description and are not intended to limit the scope of the embodiments of this disclosure, nor do they indicate the order of events.

[0375] At least one of the features described in this disclosure can also be described as one or more, and multiple features can be two, three, four or more, and this disclosure does not impose any limitations. In the embodiments of this disclosure, for a technical feature, the technical features in that technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no sequential order or size order among the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0376] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0377] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An automatic retransmission method, characterized in that, The method is executed by a terminal device and includes: The automatic retransmission of the terminal device is determined by at least one of the following pieces of information: Side link SL retransmission timer; Configure the maximum number of authorized transfers; The method further includes: For SL configuration grant transmissions with HARQ feedback enabled, if a Hybrid Automatic Repeat Request (HARQ) feedback is detected on the PSFCH resource of the physical side link feedback channel associated with the new or retransmission on the SL configuration grant, the SL retransmission timer associated with the SL HARQ process is stopped. When the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, stopping the SL retransmission timer associated with the SL HARQ process includes at least one of the following: The HARQ feedback is the ACK, which stops the SL retransmission timer associated with the SL HARQ process; The HARQ feedback is NACK, which stops the SL retransmission timer associated with the SL HARQ process and performs automatic retransmission on the next configuration authorization.

2. The method according to claim 1, characterized in that, The determination of automatic retransmission of the terminal device includes at least one of the following: In response to the successful transmission of a new data transfer on the SL configuration authorization, the SL retransmission timer associated with the SL Hybrid Automatic Repeat Request (HARQ) process corresponding to the new data transfer is started. In response to successful retransmission of SL configuration authorization, restart the SL retransmission timer associated with the SL HARQ process; In response to the LBT failure indication message received by the new transmission, the SL retransmission timer associated with the SL HARQ process is not started, and automatic transmission is performed on the next configuration authorization. In response to receiving an LBT failure indication message for the retransmission, the SL retransmission timer associated with the SL HARQ process is not restarted, and automatic retransmission is performed on the next configuration authorization.

3. The method according to claim 1, characterized in that, The method further includes at least one of the following: The SL retransmission timer associated with the SL HARQ process is running, and automatic retransmission is not configured in the authorization settings. If the SL retransmission timer associated with the SL HARQ process times out or stops, automatic retransmission will be performed on the next configuration authorization.

4. The method according to claim 1, characterized in that, The method further includes: For SL configuration grant transmissions with HARQ feedback enabled, in response to the absence of HARQ feedback on the PSFCH resource associated with the new transmission or the retransmission, the SL retransmission timer associated with the SL HARQ process is stopped, and automatic retransmission is performed on the next configuration grant.

5. The method according to claim 1, characterized in that, When the service type is multicast and the HARQ feedback mode is NACK-only, stopping the SL retransmission timer associated with the SL HARQ process includes: In response to the detection of HARQ feedback on the PSFCH resource associated with new or retransmission on the SL configuration authorization, the SL retransmission timer associated with the SLHARQ process is stopped, and automatic retransmission is performed on the next configuration authorization.

6. The method according to claim 5, characterized in that, The method further includes: For SL configuration licensed transmissions with HARQ feedback enabled, in response to the absence of HARQ feedback on the PSFCH resource associated with the new transmission or the retransmission, the SL retransmission timer associated with the SL HARQ process is stopped.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: For SL configuration authorization transmissions that are disabled by HARQ feedback, if the number of configuration authorization transmissions has not reached the maximum number of configuration authorization transmissions, the implementation determines whether to stop the SL retransmission timer associated with the SL HARQ process.

8. The method according to claim 7, characterized in that, The step of determining whether to stop the SL retransmission timer associated with the SL HARQ process based on the implementation includes at least one of the following: Based on the implementation, it is determined that no further retransmission will be performed, and the SL retransmission timer associated with the SL HARQ process is stopped; Based on the implementation, it is determined that no further retransmission will be performed, and the SL retransmission timer associated with the SL HARQ process will not be started or restarted.

9. The method according to claim 1, characterized in that, The method further includes: Receive control information sent by a network device, wherein the control information is used to instruct at least one of scheduling-side crosslink new transmission or crosslink retransmission; In response to the received control information, the SL retransmission timer associated with the SL HARQ process is stopped.

10. The method as described in claim 9, characterized in that, The step of stopping the SL retransmission timer associated with the SL HARQ process in response to the received control information includes: Based on the HARQ process identifier carried in the control information, determine the SLHARQ process associated with the HARQ process identifier; Stop the SL retransmission timer associated with the SL HARQ process.

11. The method according to claim 1, characterized in that, The method further includes: In response to determining that the configured authorized transmission count has reached the configured authorized maximum transmission count, the SL retransmission timer associated with the SL HARQ process is stopped.

12. The method according to claim 11, characterized in that, The step of stopping the SL retransmission timer associated with the SL HARQ process in response to determining that the configured authorized transmission count has reached the configured authorized maximum transmission count includes: In response to determining that the configured authorized transmission count has reached the configured authorized maximum transmission count, the SL retransmission timer associated with the SL HARQ process will not be started or restarted during the last retransmission opportunity.

13. The method according to claim 12, characterized in that, The SL retransmission timer associated with the SL HARQ process that is not started or restarted during the last retransmission opportunity includes at least one of the following: In response to the successful retransmission of the last time, the SL retransmission timer associated with the SL HARQ process is not started or restarted; In response to receiving an LBT failure indication message for the last retransmission, the SL retransmission timer associated with the SLHARQ process is not started or restarted.

14. The method according to any one of claims 1 to 6 or 8 to 13, characterized in that, The method further includes at least one of the following: The terminal device is in Radio Resource Control (RRC) connected state and obtains the SL retransmission timer configuration through dedicated signaling. The terminal device is in at least one of the RRC idle state and the RRC inactive state, and obtains the SL retransmission timer configuration through the system message block SIB; The terminal device is in an uncovered area (OOC) and obtains the SL retransmission timer configuration through pre-configuration.

15. An automatic retransmission method, characterized in that, The method is executed by a network device and includes: Send at least one of the following messages to the terminal device: Side link SL retransmission timer; Configure the maximum number of authorized transfers; Specifically, for SL configuration grant transmission with HARQ feedback enabled, if a hybrid automatic repeat request (HARQ) feedback is detected on the physical side link feedback channel (PSFCH) resource associated with the new or retransmission on the SL configuration grant, the SL retransmission timer associated with the SLHARQ process is stopped. When the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, stopping the SL retransmission timer associated with the SL HARQ process includes at least one of the following: The HARQ feedback is the ACK, which stops the SL retransmission timer associated with the SL HARQ process; The HARQ feedback is NACK, which stops the SL retransmission timer associated with the SL HARQ process and performs automatic retransmission on the next configuration authorization.

16. The method according to claim 15, characterized in that, The method further includes: Send control information to the terminal device, wherein the control information is used to instruct at least one of scheduling-side link new transmission or side link retransmission.

17. The method according to claim 16, characterized in that, in, The control information carries the HARQ process identifier.

18. The method according to any one of claims 15 to 17, characterized in that, The method further includes at least one of the following: Send dedicated signaling to the terminal device, wherein the dedicated signaling carries the SL retransmission timer configuration; A System Message Block (SIB) is sent to the terminal device, wherein the SIB carries the SL retransmission timer configuration.

19. A communication device, characterized in that, include: The determination module is used to determine the automatic retransmission of the terminal device based on at least one of the following information: Side link SL retransmission timer; Configure the maximum number of authorized transfers; The device is also used for: For SL configuration grant transmissions with HARQ feedback enabled, if a Hybrid Automatic Repeat Request (HARQ) feedback is detected on the PSFCH resource of the physical side link feedback channel associated with the new or retransmission on the SL configuration grant, the SL retransmission timer associated with the SL HARQ process is stopped. When the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, stopping the SL retransmission timer associated with the SL HARQ process includes at least one of the following: The HARQ feedback is the ACK, which stops the SL retransmission timer associated with the SL HARQ process; The HARQ feedback is NACK, which stops the SL retransmission timer associated with the SL HARQ process and performs automatic retransmission on the next configuration authorization.

20. A network device, characterized in that, include: The sending module is used to send at least one of the following information to the terminal device: Side link SL retransmission timer; Configure the maximum number of authorized transfers; Specifically, for SL configuration grant transmission with HARQ feedback enabled, if a hybrid automatic repeat request (HARQ) feedback is detected on the physical side link feedback channel (PSFCH) resource associated with the new or retransmission on the SL configuration grant, the SL retransmission timer associated with the SLHARQ process is stopped. When the service type is multicast and the HARQ feedback mode is ACK and negative acknowledgment NACK (ACK-NACK), or when the service type is unicast, stopping the SL retransmission timer associated with the SL HARQ process includes at least one of the following: The HARQ feedback is the ACK, which stops the SL retransmission timer associated with the SL HARQ process; The HARQ feedback is NACK, which stops the SL retransmission timer associated with the SL HARQ process and performs automatic retransmission on the next configuration authorization.

21. A terminal device, characterized in that, It includes a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory to cause the terminal device to perform the method as described in any one of claims 1 to 14.

22. A network device, characterized in that, It includes a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory to cause the network device to perform the method as described in any one of claims 15 to 18.

23. A communication device, characterized in that, include: Processor and interface circuitry, among which The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to run the code instructions to perform the method as described in any one of claims 1 to 14 or 15 to 18.

24. A computer-readable storage medium, characterized in that, It is used to store instructions that, when executed, cause the method as described in any one of claims 1 to 14 or 15 to 18 to be implemented.

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