CN116458259A

CN116458259A - Communication method, device and system

Info

Publication number: CN116458259A
Application number: CN202180068600.XA
Authority: CN
Inventors: 刘俊; 曾清海; 常俊仁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2023-07-18
Also published as: WO2022151449A1

Abstract

A communication method, device and system, the method at least includes: the method comprises the steps that first communication equipment determines first information, wherein the first information is used for indicating second communication equipment to start a first timer and/or a second timer in a side uplink SL process corresponding to the first information, or not to start the first timer and/or the second timer; or, the first information is used for indicating that the second communication device requests or does not request retransmission resources for the SL process; the first communication device transmits the first information to the second communication device. By adopting the method, the device and the system, the first communication equipment can indicate whether the second terminal equipment starts the first timer and/or the second timer or not, so that the timers of the first communication equipment and the second communication equipment can be aligned.

Description

Communication method, device and system

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a communications method, apparatus, and system.

Background

In a wireless communication system, in order to save power consumption of a terminal on the premise of ensuring that data can be effectively transmitted, a discontinuous reception (discontinuous reception, DRX) mechanism is introduced to control a mode in which the terminal listens to a physical downlink control channel (physical downlink control channel, PDCCH). When the DRX is configured, the terminal may periodically enter a sleep state (sleep mode), where the terminal does not need to monitor the PDCCH, and when the terminal needs to monitor, the terminal wakes up (wake up) from the sleep state, so that the terminal may achieve the purpose of saving power. When the terminal is not configured with DRX or does not execute DRX, the terminal can monitor PDCCH continuously, and the power consumption is high.

In the Side Link (SL) similar DRX to Uu described above is proposed. In SL DRX, the timer associated with retransmission includes a first timer and a second timer, and typically the first timer is started first, the first timer times out, and then the second timer is started, and at the running period of the second timer, the terminal device is in active time. How to start the first timer and/or the second timer for both parties of SL communication is a technical problem to be solved in the embodiments of the present application.

Disclosure of Invention

The embodiment of the application provides a communication method, a communication device and a communication system, so that a first timer and/or a second timer are started.

In a first aspect, a communication method is provided, including: the method comprises the steps that first communication equipment determines first information, wherein the first information is used for indicating second communication equipment to start a first timer and/or a second timer in a side uplink SL process corresponding to the first information, or not to start the first timer and/or the second timer; or, the first information is used for indicating that the second communication device requests or does not request retransmission resources for the SL process; the first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is used for indicating the maximum duration required by the receiving end to receive the resource allocation information or the authorization information of SL retransmission; the first communication device transmits the first information to the second communication device.

By the method, the first communication device indicates whether the second communication device starts the first timer and/or the second timer according to whether the retransmission resource of the SL process is requested to the network device, so that the operation of the first timer and the second timer between the first communication device and the second communication device can be aligned, and the situations of packet loss, ineffective monitoring, resource wasting and the like can be avoided.

In a possible implementation manner, the first information is used to instruct the second communication device to start the first timer and/or the second timer at the corresponding SL process, and includes: the first information is used for indicating the second communication equipment to start the first timer and/or the second timer in the corresponding SL process when or after the second communication equipment receives or receives at least one second information; the first information is used for indicating that the second communication device does not start the first timer and/or the second timer in the corresponding SL process, and includes: the first information is used for indicating the second communication device not to start the first timer and/or the second timer in the corresponding SL process when or after the second communication device receives or finishes receiving the at least one second information.

In a possible implementation manner, the first information is used to instruct the second communication device to request or not request retransmission resources for the corresponding SL process, including: the first information is used for indicating that the second communication device requests or does not request retransmission resources for the corresponding SL process when the first communication device runs out of, sends or finishes sending the at least one second information.

In a possible implementation manner, the first information is used to instruct the second communication device to request or not request retransmission resources for the SL process, and includes: the first information is used for indicating to the second communication device that at least one first transmission requests or does not request retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent; or, the first information is used for indicating to the second communication device that at least one first transmission is used up, sent or after the at least one second information is sent, and sending a SL negative acknowledgement NACK or a SL positive acknowledgement ACK to the third communication device.

In one possible implementation, the first information is carried in side-uplink control information SCI, medium access control element MAC CE, or radio resource control RRC message.

In a possible implementation manner, the first information includes at least a number or an identification of the SL process.

In one possible implementation, the method further includes: the first communication device receives third information from a third communication device, the third information being used to indicate to the first communication device that at least one first transmission is requesting or not requesting retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent.

In one possible implementation, the third information is carried in an RRC message or downlink control information DCI.

In one possible implementation, the method further includes: the first communication device determines that the first transmission requests or does not request retransmission resources from the third communication device when or after the first transmission runs out of, sends or sends the at least one second information; the first communication device sends the indication information of the first transmission to the third communication device.

In one possible implementation, the sending, by the first communication device, the indication information of the first transmission to the third communication device includes: if the third communication device configures the first transmission for the first communication device through an RRC reconfiguration message, the first communication device sends an RRC reconfiguration complete message to the third communication device, wherein the RRC reconfiguration complete message carries indication information of the first transmission.

In one possible implementation, the first transmission is a SL radio bearer SLRB, or a SL logical channel LCH, or a SL procedure.

In one possible implementation, the at least one second information includes: all second information, or the last second information, or one second information.

In one possible implementation, the at least one second information includes: the at least one second information during the current dynamic scheduling DG or the configuration scheduling CG; or the at least one second information during one DG or CG.

In one possible implementation, the second information is SCI, or SL transmission opportunity, or SL grant, or SL medium access control protocol data unit MAC PDU.

In one possible implementation, the hybrid automatic repeat request, HARQ, feedback of the SL process is de-enabled.

In a second aspect, a communication method is provided, including: the second communication equipment receives first information from the first communication equipment, wherein the first information is used for indicating the second communication equipment to start a first timer and/or a second timer or not at a side uplink SL process corresponding to the first information; or, the first information is used for indicating that the first communication device requests or does not request retransmission resources for the SL process; and the second communication equipment determines to start the first timer and/or the second timer for the corresponding SL process according to the first information, or does not start the first timer and/or the second timer. The first timer is used for indicating the minimum duration before the arrival of the resource configuration information or the authorization information expected to be used for SL retransmission, and the second timer is used for indicating the maximum duration required by the receiving end to receive the resource configuration information or the authorization information of SL retransmission.

In one possible implementation, the first information is carried in a first SCI of the SL process. Alternatively, the first information is carried in any or all SCIs of the SL process.

In one possible implementation manner, the second communication device determines, according to the first information, to start a first timer and/or a second timer for a corresponding SL process, or does not start the first timer and/or the second timer, including: the first information indicates that the first communication device requests retransmission resources for the SL process when or after the at least one second information is used up, sent, or sent; when or after the second communication device receives or receives the at least one second message, the first timer and/or the second timer are/is started in the corresponding SL process.

Or, the first information indicates that the first communication device does not request retransmission resources for the corresponding SL process when the first communication device runs out of, sends or finishes sending the at least one second information; when or after the second communication device receives or receives the at least one second message, the first timer and/or the second timer are not started in the corresponding SL process. Or the first information indication indicates that the second communication equipment starts a first timer and/or a second timer at the SL process corresponding to the first information when or after receiving at least one second information; when the second communication equipment receives or finishes receiving at least one second message, starting a first timer and/or a second timer in a corresponding SL process; or the first information indicates that the second communication equipment does not start the first timer and/or the second timer in the SL process corresponding to the first information when or after receiving at least one second information; when or after the second communication device receives or receives at least one second message, the first timer and/or the second timer are not started in the corresponding SL process. Or, the first information indicates the first communication device to send a SL negative acknowledgement NACK to the third communication device when or after the first communication device runs out of, sends or has sent at least one second information; when or after the second communication device receives or receives at least one second message, the first timer and/or the second timer are/is started in the corresponding SL process. Or, the first information indicates the first communication device to send SL positive acknowledgement ACK to the third communication device when or after running out of, sending or sending at least one second information; when the second communication equipment receives or receives at least one second message or later, the corresponding SL process does not start the first timer and/or the second timer; optionally, in the foregoing, the first information indicates that the first communication device requests or does not request retransmission resources for a corresponding SL process, and may be replaced by: the first information indicates to the first communication device to request or not request retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent for at least one first transmission. The first information indicates that the second communication device starts or does not start the first timer and/or the second timer in the SL process corresponding to the first information when or after receiving or finishing at least one second information, and may be replaced by: the first information indicates that the second communication device starts or does not start the first timer and/or the second timer for at least one first transmission at or after receiving or finishing at least one second information at the SL process corresponding to the first information. The first information indicates that the first communication device sends a SL negative acknowledgement, NACK, or a SL positive acknowledgement, ACK, to said third communication device when or after the at least one second information is used up, sent, or sent, alternatively the first information indicates that the first communication device sends a SL negative acknowledgement, NACK, or a SL positive acknowledgement, ACK, to said third communication device when or after the at least one second information is used up, sent, or sent for the at least one first transmission.

In one possible implementation, the first information is configured to instruct the second communications device to request or not request retransmission resources for the SL process, including: the first information is used for indicating to the second communication device that at least one first transmission requests or does not request retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent; or, the first information is used to indicate to the second communication device that at least one first transmission is sending a SL NACK or a SL ACK to the third communication device when or after the at least one second information is used up, sent or sent.

In one possible implementation, the at least one second information includes: all second information, or the last second information.

In a third aspect, a communication method is provided, including: the first condition is satisfied, and the first condition is: the first communication device transmitting a MAC PDU or SCI on the configured SL grant; or the first communication device receives a physical downlink control channel PDCCH transmitted by the third communication device indication SL; the first communication device starts a third timer when or after sending the SL HARQ corresponding to the first condition to the third communication device, and/or stops a fourth timer, where the third timer is used to indicate a minimum duration before the resource configuration information or the authorization information expected to be used for SL retransmission arrives, and the fourth timer is used to indicate a maximum duration required by the receiving end to receive the resource configuration information or the authorization information for SL retransmission.

In one possible implementation, the first communication device transmits a MAC PDU or SCI on a configured SL grant; or the first communication device receives a physical downlink control channel PDCCH from a third communication device indicating SL transmission, including: when the first communication device adopts CG, the first communication device transmits MAC PDU or SCI on the configured SL authorization; or when the first communication device adopts DG, the first communication device receives a physical downlink control channel PDCCH from a third communication device indicating SL transmission.

In one possible implementation, the third timer includes a third timer corresponding to the first condition, and/or the fourth timer includes a fourth timer corresponding to the first condition.

In one possible implementation, the method further includes: the third timer times out; when a second condition is met, the first communication device starts the fourth timer.

In one possible implementation, the second condition includes at least one of: the SL HARQ fed back to the third communication equipment by the first communication equipment is NACK; the first communication device receives NACK feedback from the second communication device; the first communication device does not successfully transmit SL data.

In one possible implementation manner, SL HARQ fed back by the first communications device to the third communications device is NACK; comprising the following steps: and when the SL HARQ feedback corresponding to the first condition is de-enabled, the SL HARQ fed back to the third communication equipment by the first communication equipment is NACK.

In one possible implementation, the first communication device receiving NACK feedback from a second communication device includes: and when the SL HARQ feedback corresponding to the first condition is enabled, the first communication equipment receives NACK feedback from the second communication equipment.

In one possible implementation, the first communication device does not successfully transmit SL data, including: and when the SL HARQ feedback corresponding to the first condition is de-enabled, the first communication equipment does not successfully send SL data.

In a fourth aspect, a communication method is provided, including: when a first communication device sends at least one second information to a second communication device, and/or the first communication device indicates to the second communication device retransmission resources of a SL process that has requested the at least one second information or HARQ feedback of the SL process has been sent, or later, the first communication device starts a first timer of the SL process, and/or stops a second timer of the SL process; or when the first communication device sends a positive determination ACK to a third communication device or later, the first communication device stops running or does not start the first timer of the SL process, and/or stops running or does not start the second timer of the SL process; or when the first communication device sends NACK to the third communication device or after the first communication device sends NACK to the second communication device or after the first communication device starts a first timer of the SL process and/or stops a second timer of the SL process; or when the first communication device sends an ACK to the third communication device or after the first communication device sends an ACK to the second communication device, the first communication device stops running or does not start the first timer of the SL process, and/or stops running or does not start the second timer of the SL process; the first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission arrives, and the second timer is used for indicating the maximum duration required by receiving the resource allocation information or the authorization information of SL retransmission.

By the method, when a certain SL HARQ process is enabled, the first communication equipment and the second communication equipment can start the first timer and the second timer according to PSFCH resources or HARQ feedback, so that the active time of the first communication equipment and the second communication equipment is aligned, the situation of packet loss and invalid monitoring is avoided, and the performance of SL communication is improved.

In one possible implementation, the indicating, by the first communication device, to the second communication device that retransmission resources of the SL process have been requested, or that SL HARQ feedback of the SL process has been sent, includes: when the first communication device requests retransmission resources of the SL process to the third communication device or sends NACK feedback of the SL process, or later, the first communication device indicates to the second communication device that retransmission resources of the SL process have been requested or that SL HARQ feedback corresponding to the SL process has been sent to the third communication device.

In one possible implementation, the SL HARQ feedback is NACK.

In one possible implementation, if HARQ feedback of the SL process is enabled, when the first timer expires and the first communication device receives NACK feedback from the second communication device, starting the second timer; or if the HARQ feedback of the SL process is disabled, the first communication device starts the second timer when the first timer expires.

In one possible implementation, the first communication device is configured to report the resources of the SL HARQ feedback to the third communication device.

In one possible implementation, the method further includes: when or after the second timer is started, the first communication device sends third information to the third communication device, where the third information is used to instruct the third communication device to not send a SL retransmission resource configuration of a SL new transmission or other SL process or not schedule a SL retransmission resource of the SL new transmission or other SL process only during operation of the second timer.

In one possible implementation, the method further includes: when or after the first communication device sends an ACK to the third communication device, the first communication device sends the first timer for instructing the second communication device to stop running or not to start the SL process, and/or the second timer to stop running or not to start the SL process.

In one possible implementation, the at least one second information includes: the at least one second information during the current DG or CG; or at least one second information during one DG or CG, said second information comprising SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.

In one possible implementation, the HARQ feedback of the SL process is de-enabled.

In a fifth aspect, a communication method is provided, including: when or after a second communication device receives at least one second information from a first communication device and/or the second communication device receives information from the first communication device indicating that retransmission resources of a SL process corresponding to the at least one second information have been requested or an indication of SL HARQ feedback of the SL process corresponding to the at least one second information has been sent, the second communication device starts a first timer of the SL process and/or stops a second timer; or when or after the second communication device receives the information of the first timer for indicating the second communication device to stop running or not start the SL process and/or the second timer for stopping running or not start the SL process, the second communication device stops running or not starts the first timer and/or the second timer; the first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission arrives, and the second timer is used for indicating the maximum duration required by receiving the resource allocation information or the authorization information of SL retransmission.

In one possible implementation, the SL HARQ feedback is NACK.

In one possible implementation, the method further includes: if the HARQ feedback of the SL process is enabled and the second communication device does not successfully decode the SL data of the SL process, when the first timer times out, the second communication device starts the second timer; or if the HARQ feedback of the SL process is disabled, the second communication device starts the second timer when the first timer expires.

In one possible implementation, the first communication device is configured to report the resources of SL HARQ feedback to the third communication device.

In one possible implementation, the at least one second information includes: the at least one second information during the current DG or CG; or at least one second information during one DG or CG, said second information being SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.

In a sixth aspect, a communication method is provided, including: the first communication device sends at least one piece of second information to the second communication device; the first communication device starts a first timer of a SL process corresponding to the at least one second information according to a physical sidelink feedback channel PSFCH resource or SL HARQ feedback corresponding to the at least one second information, and/or stops a second timer of the SL process, where the PSFCH resource is used for transmitting the HARQ feedback of the at least one second information; the first timer is configured to indicate a minimum duration before the resource configuration information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is configured to indicate a maximum duration required by the receiving end to receive the resource configuration information or the authorization information for SL retransmission.

In a possible implementation manner, the first communication device starts a first timer of the SL process corresponding to the at least one second information according to the physical sidelink feedback channel PSFCH resource corresponding to the at least one second information, and/or stops a second timer of the SL process, including: the first communication device starts a first timer of the SL process and/or stops a second timer of the SL process in a first time domain symbol in the PSFCH resource; or, the first communication device starts a first timer of the SL process and/or stops a second timer of the SL process at a first symbol after the PSFCH resource ends.

In a possible implementation manner, the first communication device starts a first timer of a SL process corresponding to the at least one second information according to HARQ feedback corresponding to the at least one second information, and stops a second timer of the SL process, including: the first communication device receives HARQ feedback corresponding to the at least one piece of second information from the second communication device; and when the first communication equipment receives the HARQ feedback, or after the HARQ feedback, or a first time domain symbol after the HARQ feedback, starting a first timer of the SL process, and stopping a second timer of the SL process.

In one possible implementation, the second information of the at least one includes: the at least one second information during the current DG or CG; or at least one second information during one DG or CG, said second information being SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.

In one possible implementation, HARQ feedback of the SL process is enabled.

In a seventh aspect, a communication method is provided, including: the second communication device receives at least one second information from the first communication device; the second communication device starts a first timer of a SL process corresponding to the at least one second information according to a PSFCH resource or HARQ feedback corresponding to the at least one second information, and/or stops a second timer of the SL process, where the PSFCH resource is used for transmitting the HARQ feedback of the at least one second information; the first timer is configured to indicate a minimum duration before the resource configuration information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is configured to indicate a maximum duration required by the receiving end to receive the resource configuration information or the authorization information for SL retransmission.

In a possible implementation manner, the second communication device starts a first timer of a SL process corresponding to the at least one second information according to a PSFCH resource corresponding to the at least one second information, and/or stops a second timer of the SL process, including: the second communication device starts a first timer of the SL process and stops a second timer of the SL process in a first time domain symbol in the PSFCH resource; or, the second communication device starts the first timer of the SL process and/or stops the second timer of the SL process according to the first symbol after the PSFCH resource ends.

In a possible implementation manner, the second communication device starts a first timer of a SL process corresponding to the at least one second information according to HARQ feedback corresponding to the at least one second information, and stops a second timer of the SL process, including: the second communication device sending HARQ feedback of the at least one second information to the first communication device; and when the second communication equipment sends the HARQ feedback, or after the HARQ feedback, or a first time domain symbol after the HARQ feedback, starting a first timer of the SL process, and stopping a second timer of the SL process.

In one possible implementation, the at least one second information includes: the at least one second information during the current DG or CG; or, the at least one second information during one DG or CG, the second information being SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.

In one possible implementation, HARQ feedback of the SL process is enabled.

In one possible implementation, the SLRB is a SL data radio bearer DRB, or a SL signaling radio bearer SRB.

In one possible implementation, the SL process includes: SL hybrid automatic repeat request HARQ process.

An eighth aspect provides a communication method, including: when the communication equipment is configured with SL discontinuous reception DRX and the communication equipment is in SL active time, the communication equipment monitors SCI corresponding to at least one SL DRX; and/or when the SCI indicates one or the last current SL transmission, SL data transmission, SL transmission opportunity, SL transmission of transmission opportunity, SL grant, or SL MAC PDU, the communication device starts a first timer on a SL process corresponding to the SCI, and/or stops a second timer on the corresponding SL process; and/or if the SCI indicates a new SL transmission or SL data transmission, starting or restarting a third timer on the SL DRX corresponding to the SCI in the first symbol or slot after the SCI receives.

By the above method, it is specified that when SL DRX is turned on, for any SL connection, the condition of SCI on that SL connection can be handled. Also, the reason why "when a new transmission grant of SL connection #1 is received during the inactive time of its SL connection # 1" may be that the SCI of SL connection #1 was missed by the Rx before causes only Tx to extend the active time and Rx to not extend the active time, thereby causing misalignment of the active time between Tx-Rx. In this way, the alignment activity time of Tx and Rx can be recovered as early as possible, and the packet loss of Rx is reduced.

In one possible implementation, the communication device listens for SL DRX in the SCI corresponding to at least one SL DRX may be a SL connection, or an SL DRX corresponding to a SL connection.

In one possible implementation, the SCI is a first stage SCI, or PSCCH, or both a first stage SCI and a second stage SCI.

In one possible implementation, the current last SL transmission, SL data transmission, SL transmission opportunity, SL transmission of transmission opportunity, SL grant, or SL MAC PDU may be the last SL transmission, SL data transmission, SL transmission opportunity, SL transmission of transmission opportunity, SL grant, or SL MAC PDU during the current DG or CG.

In one possible implementation, the communication device includes, at a SL active time: if Uu and SL share the same MAC entity and at least one SL connection or SL DRX is active time; or if Uu and SL do not share the same MAC entity and the SL MAC entity is active at the time.

In one possible implementation manner, the communication device starts a first timer on the SL process corresponding to the SCI, and stops a second timer on the corresponding SL process, including: after the transmission carrying the SL HARQ feedback is finished, the communication equipment starts a first timer on the corresponding SL process of the SCI and/or stops a second timer on the corresponding SL process.

In one possible implementation, when the communication device is at the SL active time, the method includes: when at least one SL DRX of the communication device is active time; the monitoring of the SCI corresponding to the at least one SL DRX includes: and monitoring SCIs corresponding to any/all SL DRX.

In one possible implementation, when the communication device is at the SL active time, the method includes: at least one of a duration timer for SL connection or SL DRX, a side-uplink DRX duration timer DRX-onduration SL, an activity timer inactivity timer, a side-uplink DRX activity timer DRX-inactivity timer SL or retransmission timer retansmission timer, a side-uplink DRX retransmission timer DRX-retransmission timer SL running, or at least one of a retransmission timer retransmission timer for SL process, or a side-uplink DRX retransmission timer DRX-retransmission timer SL running, or within time domain resources of the energy-saving resource configuration for SL broadcast/multicast; the monitoring of the SCI corresponding to the at least one SL DRX includes: and monitoring SCIs corresponding to any/all SL DRX.

In one possible implementation manner, the monitoring SCI corresponding to any/all SL DRX includes: the communication device listens for SCIs that it can listen to, addressed to itself.

In one possible implementation, when the UE is at the SL active time, the method includes: when one SL DRX or SL connection is active time; the monitoring of the SCI corresponding to the at least one SL DRX includes: monitoring the SL DRX or SL connection employs SCI on carrier frequency/frequency point.

In one possible implementation, the UE when in SL active time includes when one SL DRX or SL connection is in active time; the monitoring of the SCI corresponding to the at least one SL DRX includes: monitor the SL DRX or the SCI of the SL connection.

In one possible implementation, the SL process further includes: SL HARQ process.

In one possible implementation, the communication device is configured with SL discontinuous reception DRX.

In a ninth aspect, embodiments of the present application provide a communication apparatus, which may be a communication device, and may also be a chip in the communication device. The apparatus has a function of realizing the respective realizing methods in the first to eighth aspects described above. The functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a tenth aspect, embodiments of the present application provide a communication device comprising a processor and a memory; the memory is configured to store computer-executable instructions that, when executed by the apparatus, cause the apparatus to perform the functions of the implementation methods of the first to eighth aspects described above.

In an eleventh aspect, embodiments of the present application provide a communication device including a unit or means (means) for performing each step of each implementation method of the above first to eighth aspects.

In a twelfth aspect, embodiments of the present application provide a communication device, including a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit, and perform each implementation method of the first aspect to the eighth aspect. The processor includes one or more.

In a thirteenth aspect, an embodiment of the present application provides a communications device, including a processor, configured to be connected to a memory, and configured to invoke a program stored in the memory, so as to execute each implementation method of the first aspect to the eighth aspect. The memory may be located within the device or may be located external to the device. And the processor includes one or more.

In a fourteenth aspect, embodiments of the present application further provide a computer-readable storage medium having instructions stored therein, which when run on a computer, cause each implementation method of the above-mentioned first to eighth aspects to be performed.

In a fifteenth aspect, embodiments of the present application also provide a computer program product comprising a computer program which, when run, causes the implementation of the methods of the first to eighth aspects described above.

In a sixteenth aspect, embodiments of the present application further provide a chip system, including: a processor, configured to perform each implementation method of the first aspect to the eighth aspect.

In a seventeenth aspect, embodiments of the present application further provide a communication system, including a first communication device configured to perform any implementation method of the first aspect, and/or a second communication device configured to perform any implementation method of the second aspect.

In an eighteenth aspect, embodiments of the present application further provide a communication system including a first communication device configured to perform any implementation method of the fourth aspect, and/or a fifth communication device configured to perform any implementation method of the second aspect.

In a nineteenth aspect, embodiments of the present application further provide a communication system, including a first communication device configured to perform any implementation method of the sixth aspect, and/or a second communication device configured to perform any implementation method of the seventh aspect.

Drawings

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

fig. 2 is a schematic diagram of an application scenario provided in an embodiment of the present application;

FIG. 3 is a flow chart of a communication method according to an embodiment of the present application;

FIG. 4 is another flow chart of the communication method according to the present disclosure;

fig. 5 is another schematic diagram of an application scenario provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 7 is another schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

Fig. 1 shows a communication system 100 to which embodiments of the present application are applicable. Communication systemThe system 100 may be a long term evolution (long term evolution, LTE) system, a fifth generation mobile communication (5 ^th generation, 5G) system, new Radio (NR) system, machine-to-machine communication (machine to machine, M2M) system, future evolution sixth generation communication system, etc. As shown in fig. 1, the communication system 100 may include: one or more network devices 101, two or more terminal devices 102, and a core network (not shown).

The communication interface between the network device 101 and the terminal device 102 is called Uu air interface. Wherein the network device 101 is operable to communicate with the terminal device 102 via a wireless interface (e.g., uu air interface) under control of a network device controller (not shown), such as a base station controller (base station controller, BSC). On the Uu air interface, a link in which the terminal apparatus 102 transmits data to the network apparatus 101 is referred to as an Uplink (UL), and a link in which the terminal apparatus 102 receives data transmitted by the network apparatus 101 is referred to as a Downlink (DL). In some embodiments, the network device controller may be part of the core network or may be integrated into the network device 101.

Communication between the terminal device 102 and the terminal device 102 may also be via a wireless interface (e.g., a PC5 port). On the PC5 interface, the link between the terminal device 102 and the terminal device 102 for transmitting data is called a Sidelink (SL). The Uu interface may be used under control of the cellular network when the terminal equipment 102 is within the coverage area of an evolved universal terrestrial radio access network (evolved universal terrestrial radio access network, E-UTRAN). Terminal equipment 102 may use the PC5 interface for SL communication whether or not within the E-UTRAN coverage area. The SL communication may be a point-to-point communication between two terminal apparatuses 102, or a multicast communication performed by a group of two or more terminal apparatuses 102.

SL communication is generally applicable to the scenario of V2X etc. device direct communication. V2X refers to the networking of vehicles to a net or the networking of vehicles, which has 4 different types of applications, respectively car-to-car (vehicle to vehicle, V2V), car-to-infrastructure (vehicle to infrastructure, V2I), car-to-net (vehicle to network, V2N), car-to-pedestrian (vehicle to pedestrian, V2P). With these 4 applications, vehicles, roadside infrastructure, application servers, and pedestrians collect, process, and share status information of surrounding vehicles and environments to provide more intelligent services such as unmanned driving (automated driving/ADS), assisted driving (driver assistance/ADAS), intelligent driving (intelligent driving), online driving (connected driving), intelligent online driving (intelligent network driving), car sharing (car sharing), and the like.

As shown in fig. 1, in a V2V scenario, the terminal device 102 may be an in-vehicle terminal. On the PC5 interface, data such as vehicle position, vehicle speed, traveling direction, and the like, which indicate vehicle dynamics, are exchanged between the in-vehicle terminal and the in-vehicle terminal through SL. For example, the in-vehicle terminal a may transmit data indicating the running state of the vehicle in which the in-vehicle terminal a is located to another in-vehicle terminal B through SL. When the in-vehicle terminal B receives the data, the content expressed by the data may be displayed in the user interface. For example, the content displayed in the user interface may be "license plate number of rear vehicle (" FAF787 "), driving operation being performed by the rear vehicle (" rear vehicle FAF787 is performing an overtaking operation "), current vehicle speed of the rear vehicle (" 80km/h "), and so on. Therefore, the occurrence rate of traffic accidents can be reduced, and the driving safety is enhanced.

It should be noted that, the wireless communication system 100 shown in fig. 1 is only for illustrating the technical solution of the present application more clearly, and is not limited to the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the present application is also applicable to similar technical problems.

Based on the communication system shown in fig. 1, an application scenario is provided: as shown in fig. 2, when the hybrid automatic repeat request (hybrid automatic repeat qequest, HARQ) feedback attribute of a certain SL process is disabled. The receiving end user equipment (receive user equipment, RX UE) does not send HARQ feedback to the transmitting end user equipment (transmit user equipment, TX UE) upon receiving the corresponding information for the SL process. Currently, the timers associated with retransmissions include a first timer and a second timer. In this scenario, regarding how the RX UE starts the first timer and the second timer, the following processing schemes currently exist:

scheme 1, the rx UE does not start the first timer on SL DRX or does not start the second timer if the first timer times out even if the first timer is started. The disadvantages are as follows: if the TX UE reports NACK to the base station (requests new resources for blind retransmission), the TX UE and the base station start the first timer of the SL process on Uu DRX, and when the first timer expires, start the second timer. At this time, the base station may schedule a new SL transmission grant or a SL retransmission grant of other SL processes during the running period of the second timer, and the RX UE will be in a sleep state because the second timer is not started, and cannot receive the data packet, which results in packet loss.

Scheme 2, the rx UE starts a first timer on SL DRX and starts a second timer when the first timer expires. The disadvantages are as follows: if the TX UE reports ACK to the base station (does not request new resources for blind retransmission), the TX UE and the base station will not start the second timer on Uu DRX, which may cause the SL to start the second timer to perform ineffective listening, which wastes power consumption.

Based on the above, the embodiments of the present application provide the following solutions: the TX UE may send indication information to the RX UE according to whether to request retransmission resources from the base station, the indication information may indicate whether the RX UE starts the first timer and/or the second timer on SL DRX, or may indicate whether the TX UE requests retransmission resources from the base station, or the like, or may indicate that the TX sends NACK or SL HARQ feedback information of SL ACK to the base station. For this solution, see embodiment one and embodiment three below. In addition, the embodiment of the present application further provides the following second, fourth and fifth embodiments, where the second embodiment is applicable to a scenario of starting a third timer and a fourth timer in Uu DRX; embodiment four HARQ feedback enabled (enabled) scenarios applicable to SL processes; the fifth embodiment is applicable to the problem of what conditions the SCI on the SL connection can be handled and/or the associated timer on the corresponding SL DRX is stopped or started for any SL connection when the SL DRX is turned on.

For ease of understanding, the terms or terminology referred to in the embodiments of the present application are first introduced as part of the inventive content of the embodiments of the present application.

1. Terminal equipment

The terminal device may be simply called a terminal, and is a device with a wireless transceiver function. The terminal device may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned driving (self driving), a wireless terminal device in remote medical (remote media), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), and may further include a User Equipment (UE), etc. The terminal device may also be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future fifth generation (5th generation,5G) network or a terminal device in a future evolved public land mobile network (public land mobile network, PLMN), etc. A terminal device may also sometimes be referred to as a terminal, access terminal device, vehicle-mounted terminal device, industrial control terminal device, UE unit, UE station, mobile station, remote terminal device, mobile device, UE terminal device, wireless communication device, UE agent, UE apparatus, or the like. The terminal device may also be fixed or mobile. The embodiments of the present application are not limited in this regard.

In the embodiment of the present application, the device for implementing the function of the terminal may be the terminal; or may be a device, such as a chip system, capable of supporting the terminal to perform the function, which may be installed in the terminal. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the terminal is the terminal, and the terminal is the UE as an example, which describes the technical solution provided in the embodiment of the present application.

2. Network equipment

The network device may be an access network device, which may also be referred to as a radio access network (radio access network, RAN) device, which is a device that provides wireless communication functionality for the terminal device. Access network devices include, for example, but are not limited to: a next generation base station (gcb) in 5G, evolved node B (eNB), radio network controller (radio network controller, RNC), node B (NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (e.g., home evolved nodeB, or home node B, HNB), baseband unit (BBU), transceiving point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), mobile switching center, and the like. The access network device may also be a wireless controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in the cloud wireless access network (cloud radio access network, CRAN) scenario, or the network device may be a relay station, an access point, an in-vehicle device, a wearable device, and a network device in a future 5G network or a network device in a PLMN network that is evolving in the future, etc. The terminal device may communicate with multiple access network devices of different technologies, e.g. the terminal device may communicate with an access network device supporting long term evolution (long term evolution, LTE), with an access network device supporting 5G, with an access network device supporting LTE and with a dual connection of the access network device supporting 5G. The embodiments of the present application are not limited.

In the embodiment of the present application, the means for implementing the function of the network device may be the network device; or may be a device, such as a system-on-a-chip, capable of supporting the network device to perform this function, which may be installed in the network device. In the technical solution provided in the embodiments of the present application, the device for implementing the function of the network device is a network device, and the network device is a base station as an example, which describes the technical solution provided in the embodiments of the present application.

3. SL HARQ process

In the embodiment of the present application, the TX UE may set one SL HARQ process for each SL data, such as a medium access control element protocol data unit (media access control protocol data unit, MAC PDU) or Transport Block (TB) block that the TX UE transmits to the RX UE. I.e. one SL HARQ process is associated with one SL data, which may be stored in the SL HARQ buffer associated with the SL HARQ process. A SL HARQ process may maintain a state variable current_sl_tx_nb that indicates the number of transmissions of SL data associated with the SL HARQ process. Current_sl_tx_nb may be initialized to 0.

The HARQ feedback resource of one SL HARQ process associated with SL data may be used for the RX UE to send HARQ feedback of the SL HARQ process to the TX UE. The HARQ feedback resources are physical side uplink feedback channel (physical sidelink feedback channel, PSFCH) resources that may be used to carry the RX UE to send HARQ feedback to the TX UE. The HARQ feedback may be used to indicate whether the reception of one transmission of the SL HARQ process was successful, i.e., whether the reception of one transmission of SL data associated with the SL HARQ process was successful. If the HARQ feedback is ACK, the success of the reception of one transmission of the SL HARQ process can be indicated; if the HARQ feedback is a NACK, it may indicate that the reception of one transmission of the SL HARQ process was unsuccessful.

If Uu DRX is configured when the TX UE is in radio resource control (radio resource control, RRC) connected state. The physical downlink control channel (physical downlink control channel, PDCCH) may be listened to while the TX UE is active. One PDCCH may be used to schedule one transmission of the SL data. The one transmission may be an initial transmission (initial transmission) of the SL data or a retransmission of the SL data, e.g., a second, third, etc. The one transmission may include one or more SL transmission opportunities.

4. Configuration authorization (configured grant, CG)

The configuration authorization means that the uplink transmission of the terminal equipment does not need the scheduling of the network equipment, and the terminal equipment performs the uplink transmission according to the configuration information. The grant transmission, also called Grant Free (GF) or scheduling-free (scheduling-free) uplink transmission, is configured. The configuration grant includes two types, namely a type 1 configuration grant and a type 2 configuration grant. The difference between the two is that all parameters in the configuration authorization of the type 1 are preconfigured by the network device, so that when the configuration authorization of the type 1 is used for sending the uplink service data, the terminal device can directly utilize the parameters configured by the network device without additional scheduling information. And when the terminal equipment uses the configuration authorization of the type 2 to send the uplink service data, the terminal equipment needs to additionally receive a touch transmission message to transmit the uplink service data.

5. Dynamic authorization (DG)

When the network device performs dynamic authorization (also called dynamic scheduling), the information such as the time-frequency resource position of the scheduled transmission resource of the terminal device is indicated through downlink control information (downlink control information, DCI). Resource information of the transmission data, for example, time domain resource information and/or frequency domain resource information, etc. The transmission data may be data received or transmitted by the terminal device, etc. The resources allocated by the base station through dynamic scheduling are valid once, that is, the resources allocated by the base station for the terminal through DG can only be used once, but one DG scheduling on Uu may include one or more transmission opportunities, that is, one or more SL transmission opportunities may be indicated in one DCI indicating SL transmission, where each transmission opportunity may be understood as one grant (grant).

6. First timer and second timer

The first timer and the second timer are timers in SL DRX, where the first timer is used to indicate a minimum duration before the resource configuration information or the grant information expected to be used for SL retransmission reaches the receiving end, that is, the value of the first timer may be "the minimum duration before the resource configuration information or the grant information expected to be used for SL retransmission reaches the receiving end"; the second timer is used for indicating the maximum duration required by the receiving end to receive the resource configuration information or the authorization information of the SL retransmission, that is, the value of the second timer may be "the maximum duration until the receiving end receives the resource configuration information or the authorization information of the SL retransmission".

Alternatively, the first Timer and the second Timer may be referred to as sl-drx-HARQ-RTT-Timer and sl-drx-retransmission Timer, respectively.

7. Third timer and fourth timer

The third timer and the fourth timer are timers in Uu DRX, where the third timer is used to indicate a minimum duration before the resource configuration information or the grant information expected to be used for SL retransmission arrives, that is, the value of the third timer may be "the minimum duration before the resource configuration information or the grant information expected to be used for SL retransmission arrives at the receiving end"; the fourth timer is configured to indicate a maximum duration required for receiving the resource configuration information or the authorization information of the SL retransmission, that is, the value of the fourth timer may be "the maximum duration until the receiving end receives the resource configuration information or the authorization information of the SL retransmission".

Alternatively, the third timer and the fourth timer may be referred to as drx-HARQ-RTT-timer sl and drx-retransmission timer sl, respectively.

8. SL connection and SL DRX

In an embodiment of the present application, the SL connection may include at least one of: SL connection, SL link, SL unicast connection, or SL multicast connection, etc. SL DRX may include SL unicast DRX, SL multicast DRX, or SL broadcast DRX, etc.

It should be noted that, in the description of the present application, unless otherwise indicated, "/" means that the related objects are in a "or" relationship, for example, a/B may mean a or B; the term "and/or" in this application is merely an association relation describing an association object, and means that three kinds of relations may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. Also, in the description of the present application, unless otherwise indicated, "a plurality" means two or more than two. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", and the like are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

Example 1

An embodiment of the present application provides a communication method, including: the first communication equipment determines first information, wherein the first information is used for indicating a second communication equipment to start a first timer and/or a second timer in a corresponding SL process or not to start the first timer and/or the second timer; or, the first information is used for indicating that the second communication device requests or does not request retransmission resources for the corresponding SL process; the first communication device transmits the first information to the second communication device.

As shown in fig. 3, a flow of a communication method is provided. In this flow, the first communication device is taken as TX UE, and the second communication device is taken as RX UE for example. The method at least comprises the following steps:

step 300: the TX UE determines first information.

For example, the TX UE may determine the first information according to whether to request retransmission resources of the corresponding SL process from the base station. For example, if the TX UE requests the base station for retransmission resources of the corresponding SL process, the first information is used to instruct the RX UE to request retransmission resources in the SL process corresponding to the first information; if the TX UE does not request the retransmission resource of the corresponding SL process from the base station, the first information is used to instruct the RX UE to not request the retransmission resource in the SL process corresponding to the first information. Or if the TX UE requests retransmission resources of the corresponding SL process from the base station, the first information is used to instruct the RX UE to start at least one of the first timer and/or the second timer in the SL process corresponding to the first information; if the TX UE does not request the retransmission resource of the corresponding SL process from the base station, the first information is used to instruct the RX UE to not start the first timer and/or the second timer in the SL process corresponding to the first information.

Step 301: the TX UE transmits the first information to the RX UE. Alternatively, the first information may be carried in a SCI, a medium access control element (media access control control element, MAC CE), or an RRC message. The first information may include a number or an identification of the corresponding SL process. The number or identification is used to identify the SL process, e.g. the number or identification of the SL process may be the number (number) or identity (identity document, ID) of the SL HARQ process, etc. In the above description, the SL process is described as an example. In the embodiment of the present application, the "SL process" may also be replaced by the "SL HARQ process". In the embodiment of the present application, both the SL process and the SL HARQ process may be replaced with each other.

Step 302: and the RX UE starts or does not start the first timer and the second timer in the SL process corresponding to the first information according to the first information. Wherein step 302 described above is optional.

It may be appreciated that, in the above step 302, if the first information indicates whether the RX UE starts the first timer and/or the second timer in the corresponding SL process, the RX UE may start the first timer and/or the second timer in the corresponding SL process according to the indication of the first information. If the first information indicates whether the corresponding SL process requests retransmission resources from the base station, the RX UE may perform the following operations: the RX UE determines whether the TX UE requests retransmission resources for the corresponding SL process according to the first information; the RX UE determines whether to start the first timer and/or the second timer according to whether the TX UE requests retransmission resources for the corresponding SL process. For example, when it is determined that the TX UE requests retransmission resources for a corresponding SL process, the RX UE starts the first timer and/or the second timer of the SL process. Or when determining that the TX UE does not request retransmission resources for the corresponding SL process, the RX UE does not start or stop running the first timer and/or the second timer.

Optionally, in an embodiment of the present application, starting the first timer and/or the second timer with respect to the TX UE or the RX UE may include: starting a first timer; alternatively, if the second timer is currently running, the running second timer may also be stopped. When the first timer times out, a second timer is started, and the like. And not starting or stopping the operation of the first timer and/or the second timer with respect to the TX UE or the RX UE may include: judging whether the first timer and/or the second timer are/is running currently; if the first timer and/or the second timer are/is running, the first timer and/or the second timer are/is stopped. If not, the first timer and/or the second timer are/is not started.

According to the method, the TX UE indicates whether the RX UE starts the first timer and/or the second timer according to whether the retransmission resource of the SL process is requested to the base station or not, so that the operation of the first timer and the second timer between the TX UE and the RX UE can be aligned, and the situations of packet loss, ineffective monitoring, resource waste and the like can be avoided.

In one example, the HARQ feedback for the SL process in the embodiment shown in fig. 1 above is disabled. That is, the RX UE does not feed back HARQ feedback to the TX UE when receiving SL data transmitted by the TX UE. There is currently no relevant solution for the RX UE as to how to start the corresponding first and second timers associated with HARQ retransmissions. In the embodiment of the present application, the TX UE indicates whether the RX UE starts the first timer and the second timer according to whether the retransmission resource of the SL process corresponding to the SL data is requested from the base station. For example, if the TX UE requests the base station for the retransmission resource of the SL process, it indicates that the base station will allocate the retransmission resource of the SL process to the TX UE later, the TX UE will start the first timer, and when the first timer expires, start the second timer, so as to ensure that the PDCCH for scheduling the retransmission resource of the SL process sent by the base station can be received in the active time. Meanwhile, the TX UE also instructs the RX UE to start the first timer of the SL process, and when the first timer is overtime, the second timer is started, so that the RX UE can receive the SL data of the SL process and the like sent by the TX UE in the active time, and the RX UE can successfully receive the SL data of the SL process in the active time, and the SL communication performance is improved. Or,

If the TX UE does not request HARQ retransmission of a certain SL process to the base station, the base station will not allocate retransmission resources for the TX UE, and the TX UE will not send SL data to the RX UE. At this time, the TX UE may indicate to the RX UE that the first timer and the second timer of the SL process are not started or stopped, so that the RX UE may avoid wasting resources due to invalid listening caused by starting the second timer.

In example 1, the first information may be used to instruct the RX UE to start the first timer and/or the second timer at the corresponding SL process when or after the RX UE receives or receives at least one second information. Or, the first information is used for indicating that the RX UE does not start the first timer and/or the second timer in the corresponding SL process when or after the RX UE receives or finishes receiving at least one second information. Optionally, the at least one second information includes: all second information, or the last second information, or one second information. The second information is SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU. At least one second information comprising: at least one second information during the current DG or CG. Or at least one second information during one DG or CG.

With respect to example 1 above, in one possible implementation: the TX UE may transmit first information to the RX UE in advance, which may be carried in RRC, MAC CE, or SCI. That is, the TX UE may send RRC, MAC CE, SCI, or the like to the RX UE, and the first information may be carried in the above message or information. The first information may be used to indicate whether the RX UE starts a first timer and/or a second timer of the SL process corresponding to the first information when receiving or finishing at least one second message. Thereafter, the TX UE may transmit at least one second information to the RX UE. The RX UE may start or not start the first timer and/or the second timer when or after receiving or receiving the at least one second information according to the first information. When the at least one second information includes a plurality of second information, the RX UE receives the at least one second information, which generally means that the RX UE receives a first second information of the at least one second information. When the at least one second information includes a plurality of second information, the RX UE receives the at least one second information, which generally means that the RX UE receives the last second information of the at least one second information. And when the at least one second information includes only one second information, the RX UE receives the at least one second information, which may refer to a time when the RX UE starts to receive the second information, and the RX UE receives the at least one second information, which may refer to a time when the RX UE receives the second information.

For example, the at least one second information includes all SL transmission opportunities, SL grants or MAC PDUs during the current DG or CG, and one possible implementation of the above example may be: the TX UE may indicate to the RX UE, via RRC, MAC or RRC messages, whether to start the first timer/second timer for the corresponding SL procedure when or after receiving or finishing all SL transmission opportunities, SL grants or MAC PDUs during the current DG or CG. If the TX UE instructs the RX UE to start the first timer/the second timer corresponding to the SL process, it indicates that the TX UE requests the base station for the retransmission resource of the SL process under the corresponding condition. If the TX UE indicates that the RX UE does not start the first timer/the second timer of the corresponding SL process, it indicates that the TX UE will not request the base station for the retransmission resource of the SL process under the corresponding condition.

For example, the at least one second information is the last SL transmission opportunity during the current CG or DG, the SL grant, or the SCI of the MAC PDU, and one possible implementation of the foregoing example 1 may be: the TX UE may indicate to the RX UE, via SCI, MAC CE or RRC message, whether to start the first timer/second timer for the corresponding SL HARQ process when or after the RX UE receives or receives the SCI indicating the last SL transmission opportunity, SL grant or MAC PDU during the current DG or CG.

Example 2, the first information may indicate that the RX UE requests or does not request retransmission resources for the corresponding SL process when or after the TX UE runs out of, transmits or has transmitted the at least one second information.

With respect to example 2 above, in one possible implementation, the TX UE sends, in advance, first information to the RX UE, where the first information is used to indicate that the RX UE requests or does not request retransmission resources for the SL process corresponding to the first information when or after the TX UE runs out of, sends, or sends at least one second information. The TX UE transmits at least one second information to the RX UE. When the RX UE receives the at least one second information, if the TX UE is determined to run out, send or send the at least one second information or later, the RX UE requests retransmission resources of a corresponding SL process from the base station, and then a first timer and/or a second timer of the SL process are started; otherwise, the first timer and/or the second timer running the SL process is not started or stopped. The information about the TX UE running out of, transmitting or having transmitted at least one second information may be understood as follows: since the TX UE may perform a corresponding operation according to the at least one second information, the above-mentioned running out of the at least one second information may be considered that the related processes performed on the second information are all completed. And transmitting at least one second information may be considered as transmitting a first second information of the plurality of second information when the at least one second information includes the plurality of second information. And transmitting the at least one second information may be considered that when the at least one second information includes a plurality of second information, the TX UE transmits the last second information of the plurality of second information. And when one of the at least one second information is included, the transmitting of the at least one second information may be regarded as a time when the transmission of the second information is started, and the transmitting of the at least one second information may be regarded as a time when the transmission of the second information is completed.

For example, the at least one second information is all SL transmission opportunities, SL grants or MAC PDUs during the current DG or CG, and the one possible implementation of the foregoing example 2 includes: the TX UE indicates to the RX UE through SCI, MAC CE or RRC whether to initiate retransmission resources for the corresponding SL HARQ process when or after the TX UE runs out, sends or has sent all SL transmission opportunities, SL grants, or MAC PDUs during the current DG or CG.

Example 3, the above first information may be used to indicate to the RX UE that at least one first transmission is requesting or not requesting retransmission resources from the base station when or after running out of, sending or sending the at least one second information; alternatively, the first information is used to indicate to the RX UE that at least one first transmission is sending a SL NACK or SL ACK to the base station when or after the at least one second information is used up, sent or sent.

It will be appreciated that if the TX UE sends a SL NACK to the base station, this indicates that it requests retransmission resources from the base station, and the RX UE may start the first timer and/or the second timer. Alternatively, if the TX UE sends a SL ACK to the base station, indicating that it has not requested retransmission resources from the base station, the RX UE may stop running or not start the first timer and/or the second timer, etc.

It should be noted that, in the above embodiment, whether the TX UE requests the retransmission resource from the base station may be related to transmission. Among them, the transmission may include a SL Radio Bearer (RB), or a SL Logical Channel (LCH), or a SL process (process), or the like. That is, not all transmissions, the TX UE may request retransmission resources from the base station. For example, if transmission a is used to transmit at least one second information, after the TX UE sends the at least one second information to the RX UE, if transmission a is preconfigured to request retransmission resources from the base station, the TX UE may request retransmission resources of the at least one second information from the base station and retransmit the at least one second information to the RX UE using the retransmission resources.

In one approach, the base station may pre-configure for the TX UE which transmissions need to request retransmission resources from the base station, or which transmissions do not need to request retransmission resources from the base station. For example, the TX UE may receive third information from the base station indicating to the TX UE that the at least one first transmission requests or does not request retransmission resources from the base station when or after the at least one second information is used up, sent, or sent. Alternatively, the third information may be carried in an RRC message, DCI, or the like, which is not limited.

For example, where the first transmission includes a SL RB, SL LCH, or HARQ process, and the at least one second information includes all SL transmission opportunities, SL grants, or MAC PDUs during the current DG or CG, one possible implementation of the above described base station transmitting third information to the TX UE may be for the base station to indicate to the TX UE whether the base station requests retransmission resources when or after each SLRB, SL LCH, or HARQ process runs out, transmits, or has transmitted all SL transmission opportunities, SL grants, or MAC PDUs during the current DG or CG. Alternatively, the SLRB may include an SL data radio bearer (data resource bearer, DRB) or an SL signaling radio bearer (signal resource bearer, SRB), or the like. The RRC reconfiguration message sent by the base station to the TX UE may carry the indication per SLRB or SL LCH, and the indication per SL HARQ process is carried by DCI.

In another approach, the TX UE may determine which transmissions need to request retransmission resources from the base station and inform the base station. For example, the TX UE may determine that the first transmission is requesting or not requesting retransmission resources from the base station when or after the at least one second information is used up, sent, or sent, and the TX UE informs the base station by sending an indication of the first transmission to the base station. In one possible implementation, the TX UE may send an RRC reconfiguration complete message to the base station, where the RRC reconfiguration complete message may carry the indication information of the first transmission. The indication information of the first transmission is used for indicating the first transmission to the base station, and the indication information of the first transmission may be an identifier or a number of the first transmission. For example, the ID of the SLRB, the ID of the SLLCH, the ID of the HARQ process, or the like may be used. Correspondingly, when the base station receives the indication information of the first transmission, the base station can determine that the terminal equipment needs to request transmission of at least one piece of second information of retransmission resources according to the indication information of the first transmission. Subsequently, when the terminal equipment requests a certain retransmission resource of the second information from the base station, the base station can judge whether the transmission of the retransmission resource is previously reported or not, and if so, the current request is considered legal; otherwise, the current request is considered illegal, and retransmission resources are not distributed for the second information.

For example, taking the example that the first transmission includes SLRB, SL LCH or HARQ process, and the at least one second information includes all SL transmission opportunities, SL grants, and MAC PDUs during the current DG or CG, when or after the TX UE determines that the first transmission is used up, sends or finishes at least one second information, and requests or does not request retransmission resources from the base station, one implementation may be: the TX UE determines which SLRBs, SL LCHs or HARQ processes need to request retransmission resources to the base station when or after all transmission opportunities, SL grants, MAC PDUs during the current DG or CG are exhausted, sent or sent, and sends indication information per SLRB, per SL LCH or HARQ process to the base station. For example, if when the base station sends the SLRB configuration to the TX UE through the RRC reconfiguration message, the TX UE determines to use the indication per SLRB or SL LCH in the foregoing, the TX may send an RRC reconfiguration complete message to the base station, where the RRC reconfiguration complete message carries the indication per SLRB or SL LCH in the foregoing. Alternatively, if the TX UE adopts the SLRB or the SL LCH configured by itself, the TX UE does not need to send the above message to the base station.

It should be noted that the solution in the first embodiment described above may be applied to: HARQ feedback for SL process is a de-enabled scenario. And the first timer and the second timer in the first embodiment may be the first timer and the second timer in SL DRX.

By the above scheme, when the TX UE has resource configuration for reporting the SL HARQ feedback to the base station and the SL HARQ feedback is disabled, it is possible to avoid that the RX UE loses packets on the SL due to the fact that the second timer is not started, or wastes power consumption due to the fact that the second timer is started to perform ineffective monitoring on the SCI when not necessary.

Example two

An embodiment II of the present application provides a communication method, which at least includes: when the first condition is met, the first communication device starts the third timer and stops the fourth timer when or after the first communication device sends the SL HARQ for the first condition to the third communication device. And a third timer for indicating a minimum time period before the arrival of the resource configuration information or the grant information desired for the SL retransmission, and a fourth timer for indicating a maximum time period required for receiving the resource configuration information or the grant information of the SL retransmission. Optionally, the third timer includes a third timer corresponding to the first condition, and the fourth timer includes a fourth timer corresponding to the first condition.

Wherein the first condition comprises: the first condition is: the first communication device transmitting a MAC PDU or SCI on the configured SL grant; or the first communication device receives a physical downlink control channel PDCCH transmitted by the third communication device indication SL. In one possible implementation, the first condition is: the first communication device transmitting a MAC PDU or SCI on the configured SL grant; or the first communication device receives a physical downlink control channel PDCCH from a third communication device indicating SL transmission, including: when the first communication device adopts CG, the first communication device transmits MAC PDU or SCI on the configured SL authorization; or when the first communication device adopts DG, the first communication device receives a physical downlink control channel PDCCH from a third communication device indicating SL transmission;

Optionally, the third timer times out; when the second condition is satisfied, the first communication device starts the fourth timer. Optionally, the second condition includes at least one of:

the SL HARQ feedback fed back to the third communication device by the first communication device is NACK; optionally, when the SL HARQ feedback corresponding to the first condition is disabled, the SL HARQ fed back by the first communications device to the third communications device is negative acknowledgement NACK;

the first communication device receives NACK feedback from the second communication device; optionally, when the SL HARQ feedback corresponding to the first condition is enabled, the first communications device receives NACK feedback from the second communications device.

The first communication device does not successfully transmit the SL data. Optionally, when the SL HARQ feedback corresponding to the first condition is enabled, the first communication device does not successfully send SL data.

In the following description, a first communication device is taken as a TX UE, a second communication device is taken as an RX UE, and a third communication device is taken as a base station as an example.

In a first example, with the second condition including that the SL HARQ feedback sent by the TX UE to the base station is NACK, one possible implementation may include: when the first condition is satisfied, the TX UE starts the third timer and stops the fourth timer when or after transmitting corresponding SL HARQ feedback to the base station. And when the first timer is overtime and the SL HARQ feedback sent by the TX UE to the base station is NACK, starting a fourth timer. This example is applicable to scenarios where HARQ for SL processes is de-enabled.

A second example, in a second condition, includes at least one of: as an example, in which the SL HARQ feedback sent by the TX UE to the base station is NACK, or NACK feedback received from the RX UE, or the SL data is not successfully sent by the TX UE, one possible implementation may be: when the first condition is met, after the TX UE sends the corresponding PUCCH carrying SL HARQ feedback, starting the third timer of the HARQ process associated with the PUCCH, and stopping the fourth timer. And when the third timer is overtime and the SL HARQ feedback=NACK, or NACK is received on the SL, or the TX UE does not successfully send the SL data, starting a fourth timer.

By the method, when the third timer is overtime, the TX UE does not directly start the fourth timer, but judges whether a PDCCH for monitoring and scheduling SL retransmission resources exists according to actual conditions. For example, when the second condition is met, the fourth timer is started again if the TX UE needs to monitor the PDCCH for scheduling SL retransmission resources. Compared with the time out of the third timer, the method directly starts the fourth timer, so that invalid monitoring of the UE can be reduced, and the power consumption of the UE can be saved.

It should be noted that, in the second embodiment, the foregoing third timer and fourth timer in Uu DRX may be applied, which are both the third timer and fourth timer in Uu DRX.

Example III

The third embodiment provides a communication method, at least including: when or after a first communication device sends at least one second information to a second communication device and/or the first communication device indicates to the second communication device that retransmission resources of a SL process have been requested for the at least one second information or HARQ feedback of the SL process has been sent, the first communication device starts a first timer of the SL process and/or stops a second timer of the SL process.

Correspondingly, when or after the RX UE receives at least one second information from the TX UE and/or the RX UE receives information from the TX UE indicating that retransmission resources of an SL process corresponding to the at least one second information are requested or indicating that SL HARQ feedback of the SL process corresponding to the at least one second information is sent, the RX UE starts a first timer of the SL process and/or stops a second timer; or when or after the RX UE receives information from the TX UE for instructing the RX UE to stop running or not to start the SL process and/or stopping running or not to start the second timer of the SL process, the RX UE stops running or not to start the first timer and/or the second timer. Alternatively, the TX UE may start the second timer when the first timer expires. The SL HARQ feedback may be NACK.

Taking the first terminal device as TX UE, the second communication device as RX UE, and at least one second information as the most or all SCI, SL grant, SL transmission opportunity, or SL MAC PDU during the current CG or DG as an example. For the above scheme, the TX UE starts the first timer and/or the second timer, and possible implementation manners may be: when or after the TX UE sends the last or all SCI, SL grant, SL transmission opportunity or SL MAC PDU during the current DG or CG to the RX UE and indicates to the RX UE that "retransmission resources have been requested or SL HARQ feedback has been sent", the first timer of the SL HARQ process associated with the SL grant is started and the second timer is stopped. Optionally, the HARQ feedback of the SL process is NACK. The TX UE may indicate to the RX UE "retransmission resources of the SL process have been requested, or HARQ feedback of the SL process has been transmitted", etc., upon or after transmitting a NACK to the base station.

Wherein, in the above scheme, when the first timer expires, the TX UE may perform any one of the following manners:

mode 1: starting a second timer;

corresponding to this mode 1, one implementation on the rx UE side is: when or after the RX UE receives the last or all SCI, SL grant, SL transmission opportunity or SL MAC PDU during the current DG or CG and receives the "indication of requested retransmission resources or sent HARQ feedback" sent by the TX UE, the first timer of the SL HARQ process associated with the grant is started and the second timer is stopped. And when the first timer is overtime, starting the second timer. Or if the RX UE does not receive the above indication of the TX UE, starting the first timer of the SL HARQ process associated with the grant and stopping the second timer when or after receiving the last or all SCI, SL grant, transmission opportunity or SL MAC PDU during the current DG or CG.

Mode 2: the second timer is started and third information is sent to the base station, the third information being used to instruct the base station to not send a SL retransmission resource configuration for a SL new transmission or other SL process or to not schedule a SL retransmission resource for a SL new transmission or other SL process during operation of the second timer only. This consideration is mainly based on the following reasons: since the base station considers that the second timer is started during this period, it is possible to send other SL new transmission grants, or SL retransmission resource configurations for other SL processes.

Corresponding to the above manner 2, one implementation manner of the rx UE side may be: when or after the RX UE receives the last or all SCI, SL grant, SL transmission opportunity or SL MAC PDU during the current DG or CG and receives the "indication of requested retransmission resources or sent HARQ feedback" sent by the TX UE, the first timer of the SL HARQ process associated with the grant is started and the second timer is stopped. The first timer times out and if the SL data is not successfully decoded, the second timer is started.

This means that when the SL HARQ process times out, the second timer is not started if the SL data is successfully decoded. At this time, on the Tx UE side, even if the second timer is started, the Tx UE instructs the base station not to transmit a new SL transmission or retransmission of another SL HARQ process when only the second timer is running, so that the Rx will not drop packets on SL.

The third embodiment also provides a communication method, at least including: when or after the first communication device sends an ACK to the third communication device, the first communication device stops running or does not start the first timer of the SL process, and/or stops running or does not start the second timer of the SL process. Optionally, when or after the first communication device sends an ACK to the third communication device, the first communication device may also send, to the second communication device, indication information of a first timer for instructing the second communication device to stop running or not start the SL process, and/or indication information of a second timer for stopping running or not start the SL process. Correspondingly, when or after receiving the indication information from the first communication device, the second communication device is used for indicating the second communication device to stop running or not to start the first timer of the SL process, and/or stopping running or not to start the second timer of the SL process, if the second communication device has started the first timer and/or the second timer of the SL process, the second communication device stops running the first timer and/or the second timer.

Taking the first terminal device as TX UE, the second terminal device as RX UE, and the third communication device as a base station as an example, one possible implementation manner of the foregoing embodiment includes: when or after the TX UE sends ACK to the base station, the first timer corresponding to the SL HARQ process is stopped or not started to the RX, so that the resource waste caused by invalid monitoring by the second timer started by the RX UE is avoided.

The third embodiment also provides a communication method, at least including: when the first communication device sends NACK to the third communication device or after the first communication device sends NACK to the second communication device or after the first communication device starts a first timer of the SL process and stops a second timer of the SL process. Correspondingly, when or after receiving the NACK, the second communication device starts the first timer of the SL process and stops the second timer of the SL process.

Taking the first terminal device as TX UE, the second terminal device as RX UE, and the third communication device as a base station as an example, one possible implementation manner of the foregoing embodiment includes: and when the TX UE requests retransmission resources of the SL process to the base station or transmits NACK of the SL process or later, the TX UE indicates that the NACK is transmitted to the base station. Accordingly, the RX UE starts the first timer and/or stops the second timer when or after receiving the NACK. And the TX UE may start the first timer and/or stop the second timer when or after a NACK is sent to the base station, or when or after a NACK is indicated to the RX UE to have been sent to the base station.

The embodiment also provides a communication method, at least including: when or after the first communication device sends an ACK to the third communication device, when or after the first communication device sends an ACK to the second communication device, the first communication device stops running or does not start the first timer of the SL process, and/or stops running or does not start the second timer of the SL process. Accordingly, the second communication device does not start or stop running the first timer and/or does not start or stop running the second timer when or after receiving the ACK.

Taking the first terminal device as TX UE, the second terminal device as RX UE, and the third communication device as a base station as an example, one possible implementation manner of the foregoing embodiment includes: when or after the TX UE sends an ACK to the base station, it indicates to the RX UE that the ACK has been sent to the base station. Correspondingly, when or after receiving the ACK, the RX UE stops running or does not start the first timer, and if the second timer runs, stops running the second timer. The TX UE may stop running or not start the first timer when or after sending an ACK to the base station, or when or after indicating to the RX UE that an ACK has been sent to the base station, and stop running the second timer if it is running.

It should be noted that, in the third embodiment, the HARQ feedback of the SL process may be disabled, but the embodiment is not limited thereto. The scheme like the third embodiment described above can also be applied to a scenario in which HARQ feedback of SL process is enabled, and the like.

For any one of the communication methods provided in the third embodiment, the embodiments of the present application further provide the following schemes: how to start the second timer when the first timer times out.

For TX UE: if the HARQ feedback of the SL process is enabled, when the first timer times out and the first communication device receives the NACK feedback from the second communication device, starting the second timer, where the scheme may be applied to a scenario in which the HARQ feedback of the SL process is enabled; or if the HARQ feedback of the SL process is disabled, when the first timer expires, the first communication device starts the second timer, and the scheme may be applied to a scenario in which the HARQ feedback of the SL process is disabled. Optionally, the first communication device is configured to report the resource of the SL HARQ feedback to the third communication device.

In one possible implementation, when the first timer times out, then: if the TX UE has the resource reporting the SL HARQ feedback to the base station or the resource reporting the SL HARQ feedback to the base station, and the HARQ feedback is enabled, the TX UE starts the second timer when receiving the NACK feedback of the RX UE. Or if the TX UE has the resource reporting the SL HARQ feedback to the base station or the resource reporting the SL HARQ feedback to the base station and the HARQ feedback is de-enabled, starting a second timer.

In this embodiment of the present application, the TX UE may report the SL HARQ feedback to the base station through the PUCCH, or may report the SL HARQ feedback to the base station through the PUSCH.

For RX UE: if the HARQ feedback of the SL process is enabled and the second communication device does not successfully decode the SL data of the SL process, when the first timer expires, the second communication device starts the second timer, and the scheme may be applied to a scenario in which the HARQ feedback of the SL process is enabled; or if the HARQ feedback of the SL process is disabled, the second communication device starts the second timer when the first timer expires. Optionally, the first communication device is configured to report the resource of the SL HARQ feedback to the third communication device, and the scheme may be used in a scenario in which the HARQ feedback of the SL process is disabled.

In one possible implementation, when the first timer expires, then: if the TX UE has a resource for reporting SL HARQ feedback to the base station or the TX UE reports the resource for SL HARQ feedback to the base station and the HARQ feedback is enabled, the RX UE starts a second timer after not successfully decoding SL data, and the scheme can be applied to a scene that the HARQ feedback of the SL process is enabled; or if the TX UE has a resource reporting the SL HARQ feedback to the base station or if the TX UE reports the SL HARQ feedback to the base station, and the HARQ feedback is de-enabled, starting a second timer, where the scheme may be applied to a scenario where the HARQ feedback of the SL process is de-enabled.

By the above scheme, when the TX UE has resource configuration for reporting the feedback of the SL HARQ to the base station and the feedback of the SL HARQ is disabled, it is possible to avoid the packet loss of the RX UE on the SL due to the fact that the second timer is not started, or the power consumption is wasted due to the fact that the second timer is started to perform ineffective monitoring of the SCI when not necessary.

Example IV

An embodiment provides a communication method, which at least includes: the first communication device sends at least one piece of second information to the second communication device; and the first communication equipment starts a first timer of the SL process corresponding to the at least one second information according to PSFCH resource or SL HARQ feedback of a physical sidestream feedback channel corresponding to the at least one second information, and/or stops a second timer of the SL process. Accordingly, the second communication device receives at least one second information from the first communication device; and the second communication equipment starts a first timer of the SL process corresponding to the at least one second information according to PSFCH resources or HARQ feedback corresponding to the at least one second information, and/or stops a second timer of the SL process. Wherein the PSFCH resource is used for transmitting HARQ feedback of the at least one second information.

As shown in fig. 4, a flow of a communication method is provided, in which a first communication device is taken as a TX UE, and a second communication device is taken as an RX UE, and at least the following steps are included:

step 401: the TX UE transmits at least one second information to the RX.

Step 402: and the TX UE starts a first timer of the SL process corresponding to the at least one second information according to PSFCH resources or SL HARQ feedback corresponding to the at least one second information, and/or stops a second timer of the SL process. Optionally, when the first timer expires and the TX UE receives NACK feedback from the RX UE corresponding to the SL process, the second timer is started.

In an example, the TX UE starts a first timer of a SL process corresponding to the at least one second information according to a physical sidelink feedback channel PSFCH resource corresponding to the at least one second information, and/or stops a second timer of the SL process, including: the TX UE starts a first timer of the SL process and/or stops a second timer of the SL process in a first time domain symbol of the PSFCH resource. Or, the first symbol after the PSFCH resource ends, the first timer of the SL process is started, and/or the second timer of the SL process is stopped by the TX UE.

For example, taking the example that the at least one second information includes the last or all SCI, SL grant, SL transmission opportunity or SL MAC PDU during the current DG or CG, one possible implementation of the above example may be: when or after the TX UE sends the last or last SCI, SL grant, SL transmission opportunity or SL MAC PDU during the current DG or CG to the RX UE, the TX UE starts the first timer of the SL HARQ process associated with the SCI, SL grant, SL transmission opportunity or SL MAC PDU at the first symbol or slot after or corresponding to the PSFCH resource location of the SCI, SL grant, SL transmission opportunity or SL MAC PDU, and stops the second timer.

For example, with at least one second information including SCI, SL grant, SL transmission opportunity or SL MAC PDU, one possible implementation of the above example may be: when or after the TX UE sends one or more of SCI, SL grant, SL transmission opportunity, and SL MAC PDU, the TX UE starts the first timer of the SL HARQ process associated with the grant at the first symbol of the PSFCH resource position or the first time domain symbol after the PSFCH resource position corresponding to the SCI, SL grant, SL transmission opportunity, and SL MAC PDU, and stops the second timer.

In another example, the TX UE starts a first timer of a SL process corresponding to the at least one second information according to HARQ feedback corresponding to the at least one second information, and stops a second timer of the SL process, including: the TX UE receives HARQ feedback corresponding to the at least one piece of second information from the RX UE; and when the TX UE receives the HARQ feedback, or after the HARQ feedback, or a first time domain symbol after the HARQ feedback, starting a first timer of the SL process and stopping a second timer of the SL process.

For example, with at least one second information including SCI, SL grant, SL transmission opportunity or SL MAC PDU, one possible implementation of the above example may be: when receiving the first symbol of HARQ feedback (PSFCH) of the RX UE, the TX UE starts the first timer of the corresponding or associated SL HARQ process of the SCI, SL grant, SL transmission opportunity, SL MAC PDU, and stops the second timer.

Step 403: and the RX UE starts a first timer of the SL process corresponding to the at least one second information according to PSFCH resources or SL HARQ feedback corresponding to the at least one second information, and stops a second timer of the SL process. Optionally, when the first timer times out and the SL data corresponding to the SL process is not successfully received or decoded, the second timer is started.

In an example, the RX UE starts a first timer of a SL process corresponding to the at least one second information according to HARQ feedback corresponding to the at least one second information, and stops a second timer of the SL process, including: the RX UE sends HARQ feedback of the at least one second information to the TX UE; and when the RX UE transmits the HARQ feedback, or after the HARQ feedback, or a first time domain symbol after the HARQ feedback, starting a first timer of the SL process and stopping a second timer of the SL process.

For example, taking the example that the at least one second information includes the last or all SCI, SL grant, SL transmission opportunity or SL MAC PDU during the current DG or CG, one possible implementation of the above example may be: the RX UE receives the last or all SCI, SL grant, SL transmission opportunity, or SL MAC PDU during the current DG or CG and starts the first timer of the SL HARQ process associated with the grant and stops the second timer when the first symbol after HARQ feedback is sent to the TX UE. Wherein the HARQ feedback is HARQ feedback for the SCI, SL grant, SL transmission opportunity, or SL MAC PDU.

For example, taking at least one second information including SCI, SL grant, SL transmission opportunity or SL MAC PDU as an example, one possible implementation of the above example may be: when the RxUE receives SCI, SL grant, SL transmission opportunity and SL MAC PDU, and the first symbol after sending HARQ feedback to TX UE, the first timer of the SL HARQ process associated with the grant is started, and the second timer is stopped.

In another example, the RX UE starts a first timer of a SL process corresponding to the at least one second information according to a PSFCH resource corresponding to the at least one second information, and stops a second timer of the SL process, including: the RX UE starts a first timer of the SL process and stops a second timer of the SL process in a first time domain symbol in the PSFCH resource.

Optionally, in this embodiment of the present application, as shown in fig. 5, HARQ feedback of the SL process is enabled.

It should be noted that in this third embodiment, the first timer and the second timer may be the first timer and the second timer of SL DRX.

By the method, when a certain SL HARQ process is enabled, the TX UE and the RX UE can start the first timer and the second timer according to PSFCH resources or HARQ feedback, so that the active time of the TX UE and the RX UE is aligned, the situations of packet loss and invalid monitoring are avoided, and the performance of SL communication is improved.

In the present invention, the SCI may include a first stage SCI, or a PSCCH, or both.

In the invention, the start-stop actions of the first timer and the second timer on the SL DRX of the TX UE side can be selected as optional, namely, for the content of the TX UE side, after the related content of the start-stop actions of the first timer and the second timer on the SL DRX is deleted, the residual actions are still effective, and the residual actions are independently used as the protection content of the invention.

Example five

The fifth embodiment provides a communication method, including: when the communication equipment is configured with SL discontinuous reception DRX and the communication equipment is in SL active time, the communication equipment monitors SCI corresponding to at least one SL DRX; and/or when the SCI indicates one or the last current SL transmission, SL data transmission, SL transmission opportunity, SL transmission of transmission opportunity, SL grant, or SL MAC PDU, the communication device starts a first timer on a SL process corresponding to the SCI, and/or stops a second timer on the corresponding SL process; and/or if the SCI indicates a new SL transmission or SL data transmission, starting or restarting a third timer on the SL DRX corresponding to the SCI in the first symbol or slot after the SCI receives.

In the present invention, the active time may be replaced with an active time (active time).

Optionally, the communication device monitors SL DRX in the SCI corresponding to at least one SL DRX, which may be SL connection, or SL DRX corresponding to SL connection. The SCI is a first stage SCI, or PSCCH, or both. The last current SL transmission, SL data transmission, SL transmission opportunity, SL transmission of transmission opportunity, SL grant, or SL MAC PDU may be the last SL transmission, SL data transmission, SL transmission opportunity, SL transmission of transmission opportunity, SL grant, or SL MAC PDU during the current DG or CG.

Optionally, the communication device includes, at SL active time: if Uu and SL share the same MAC entity and at least one SL connection or SL DRX is active time; alternatively, if Uu and SL do not share the same MAC entity and the SL MAC entity is active at the time.

Optionally, the communication device starts a first timer on the SL process corresponding to the SCI, and stops a second timer on the corresponding SL process, including: after the transmission carrying the SL HARQ feedback is finished, the communication equipment starts a first timer on the corresponding SL process of the SCI and/or stops a second timer on the corresponding SL process.

In one example, the method when the communication device is at SL active time comprises: when at least one SL DRX of the communication device is active time; the monitoring of the SCI corresponding to the at least one SL DRX includes: and monitoring SCIs corresponding to any/all SL DRX.

For example, assume that the active time of SL DRX for different SL connections is shared, i.e. when the UE receives the SCI of connection #1 during the inactive time of its connection #1, if its connection #2 is active time, the UE processes the SCI and/or triggers "start/restart SL inactivity timer on connection #1 and HARQ RTT timer, stop corresponding retransmission timer".

Mode 1: it is not reflected whether Uu and SL share the same MAC entity:

if at least one SL connection or SL DRX is active, then the SCI of any/all SL connections is monitored, and/or for the SL DRX of the SL connection indicated by the SCI, the corresponding SL inactivity timer, SL HARQ RTT timer, SL retransmission timer is started or stopped when the existing start or stop conditions are met. For example: when the SCI indicates a SL transmission or indicates a last SL transmission opportunity, SL grant, MAC PDU corresponding to a current DG or CG period, the UE starts a HARQ RTT timer on a SL (HARQ) process corresponding to the SCI, and stops retransmission timer on the corresponding SL (HARQ) process; if the SCI indicates a new SL transmission on a SL connection or SL DRX, the first symbol after the SCI reception ends starts or restarts SL inactivity timer on the SL connection or SL DRX.

Mode 2: whether Uu and SL share the same MAC entity:

if Uu and SL share the same MAC entity and at least one SL connection or SL DRX is active, or if Uu and SL do not share the same MAC entity and the SL MAC entity is active, then the SCI of any SL connection is monitored/all, and for the SL DRX of the SL connection indicated by the SCI, the corresponding SL inactivity timer, SL HARQ RTT timer, SL retransmission timer is started or stopped when the existing start or stop conditions are met. Reference is specifically made to the corresponding parts in the above mode 1.

Optionally, when the communication device is at SL active time, the method includes: at least one of a duration timer for SL connection or SL DRX, a side-uplink DRX duration timer DRX-onduration SL, an activity timer inactivity timer, a side-uplink DRX activity timer DRX-InactyityTimersl or a retransmission timer retansmission timer, a side-uplink DRX retransmission timer DRX-retransmission timer SL running, or at least one of a retransmission timer retransmission timer for SL process, or a side-uplink DRX retransmission timer DRX-retransmission timer SL running, or in a time domain resource of a power saving resource configuration or resource mode for SL broadcast/multicast, which is mainly applied to the case of saving power consumption by receiving SL broadcast, multicast traffic with specific resources; the monitoring of the SCI corresponding to the at least one SL DRX includes: and monitoring SCIs corresponding to any/all SL DRX. Alternatively, the SL DRX corresponds to SL unicast, SL multicast or broadcast, or the like.

In a possible implementation manner, the monitoring SCI corresponding to any or all SL DRX includes: the communication device listens for SCIs that it can listen to, addressed to itself.

For example, assume that the active time of SL DRX for different SL connections is not fully shared. This is considered for the case where "some SL is connected to carrier a and some SL is connected to carrier B". In this case, when the UE receives SCI of connection #1, the UE can also receive SCI of other SL connections on the same carrier frequency as connection # 1. Monitoring a SCI on a carrier frequency for a SL DRX or SL connection when the SL DRX or SL connection is active, and/or starting a HARQ RTT timer on a SL (HARQ) process corresponding to the SCI and stopping retransmission timer on the corresponding SL (HARQ) process when the SCI indicates a SL transmission or indicates a last SL transmission opportunity, SL grant, MAC PDU corresponding to a current DG or CG period; if the SCI indicates a new SL transmission (on a certain SL connection or SL DRX), the first symbol after the SCI reception ends starts or restarts SL inactivity timer on the SL connection or SL DRX.

Optionally, the above-mentioned when the UE is in SL active time includes when one SL DRX or SL connection is in active time; the monitoring of the SCI corresponding to the at least one SL DRX includes: monitor the SL DRX or the SCI of the SL connection.

In addition to the above, this embodiment five also provides an example in which: assuming that the active time of the SL DRX of the different SL connections is independent, i.e. when the UE receives the SCI of connection #1 during the inactive time of its connection #1, if its connection #2 is active time, the UE does not process this SCI and/or does not trigger "start/restart SL inactivity timer on connection #1 and HARQ RTT timer, stop the corresponding retransmission timer".

If one SL connection or SL DRX is active, then the SCI of the SL connection is listened to, and/or when the SCI indicates one SL transmission, or the last SL transmission opportunity of the current DG/CG period, SL HARQ RTT timer corresponding to the SL HARQ process is started. If the SCI indicates a SL new pass, SL inactivity timer is started. Optionally, the communication device is configured with SL DRX.

By the above method, this embodiment five specifies that when SL DRX is on, the condition of SCI on any SL connection can be handled for that SL connection. Also, the reason why "when a new transmission grant of SL connection #1 is received during the inactive time of its SL connection # 1" may be that the SCI of SL connection #1 was missed by the Rx before causes only Tx to extend the active time and Rx to not extend the active time, thereby causing misalignment of the active time between Tx-Rx. In this way, the alignment activity time of Tx and Rx can be recovered as early as possible, and the packet loss of Rx is reduced.

Referring to fig. 6, a schematic diagram of a communication device according to an embodiment of the present application is provided. The apparatus is configured to implement the steps performed by the first communication device, the second communication device, or the communication device in the foregoing embodiments, and as shown in fig. 6, the apparatus 600 includes a transceiver unit 610 and a processing unit 620.

In a first embodiment, the communication apparatus may be the first communication device or a chip used in the first communication device, then:

a processing unit 620, configured to determine first information, where the first information is used to instruct a second communication device to start a first timer and/or a second timer in a side uplink SL process corresponding to the first information, or not to start the first timer and/or the second timer; or, the first information is used for indicating that the second communication device requests or does not request retransmission resources for the corresponding SL process; the first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is used for indicating the maximum duration required by the receiving end to receive the resource allocation information or the authorization information of SL retransmission. And a transceiver unit 610, configured to send the first information to the second communication device.

In one possible implementation, the transceiver unit 610 is further configured to: and receiving third information from a third communication device, wherein the third information is used for indicating that at least one first transmission is used up, sent or after the at least one second information is sent to the first communication device, and requesting or not requesting retransmission resources from the third communication device.

In one possible implementation, the processing unit 620 is further configured to: determining that the first transmission requests or does not request retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent; the transceiver unit 610 is further configured to send the indication information of the first transmission to the third communication device.

In one possible implementation manner, the sending, to the third communication device, the indication information of the first transmission includes: and if the third communication equipment configures the first transmission for the first communication equipment through an RRC reconfiguration message, sending an RRC reconfiguration completion message to the third communication equipment, wherein the RRC reconfiguration completion message carries the indication information of the first transmission.

In a second embodiment, the communication apparatus may be the first communication device or a chip used in the second communication device, then:

a transceiver unit 610 for receiving first information from a first communication device; a processing unit 620, configured to determine, according to the first information, to start a first timer and/or a second timer for a SL process corresponding to the first information, or not to start the first timer and/or the second timer; or determining whether to request or not request retransmission resources in the corresponding SL process, wherein a first timer is used for indicating the minimum time length before the arrival of the resource configuration information or the authorization information expected to be used for SL retransmission, and a second timer is used for indicating the maximum time length required for receiving the resource configuration information or the authorization information of SL retransmission.

In a third embodiment, the communication apparatus may be the first communication device or a chip used in the first communication device, then:

the processing unit 620 is configured to satisfy a first condition, where the first condition is: the first communication device transmitting a MAC PDU or SCI on the configured SL grant; or the first communication device receives a physical downlink control channel PDCCH transmitted by the third communication device indication SL; a transceiver unit 610, configured to start a third timer to stop a fourth timer when or after the SL HARQ for the first condition is transmitted to the third communication device, where the third timer is used to indicate a minimum duration before the resource configuration information or the grant information for SL retransmission is expected to arrive, and the fourth timer is used to indicate a maximum duration required for receiving the resource configuration information or the grant information for SL retransmission.

In one possible implementation, the MAC PDU or SCI is sent on a configured SL grant; or the first communication device receives a physical downlink control channel PDCCH from a third communication device indicating SL transmission, including: when the first communication device adopts CG, the first communication device transmits MAC PDU or SCI on the configured SL authorization; or when the first communication device adopts DG, the first communication device receives a physical downlink control channel PDCCH from a third communication device indicating SL transmission; the method of claim 1, wherein the first timer comprises a first timer corresponding to the first condition, and/or the second timer comprises a second timer corresponding to the first condition.

The processing unit 620 is further configured to start the second timer when the first timer expires and a second condition is satisfied.

In one possible implementation, the second condition includes at least one of:

the SL HARQ fed back to the third communication equipment by the first communication equipment is negative acknowledgement NACK;

the first communication device receives NACK feedback from the second communication device;

The first communication device does not successfully transmit SL data.

In one possible implementation manner, SL HARQ fed back by the first communications device to a third communications device is a negative acknowledgement NACK; comprising the following steps: when the feedback of the SL HARQ corresponding to the first condition is disabled, the SL HARQ fed back by the first communication equipment to the third communication equipment is negative acknowledgement NACK;

In a fourth embodiment, the communication apparatus may be the first communication device or a chip used in the first communication device, then:

a processing unit 620, configured to start a first timer of the SL process and/or stop a second timer of the SL process when a first communication device sends at least one second information to a second communication device and/or the first communication device indicates to the second communication device that retransmission resources of the SL process have requested the at least one second information or HARQ feedback of the SL process has been sent or later; or, the processing unit 620 is configured to stop running or not starting the first timer of the SL process and/or stop running or not starting the second timer of the SL process when the first communication device sends a positive determination ACK to the third communication device or after the first communication device sends a positive determination ACK; or, the processing unit 620 is configured to, when the first communication device sends a NACK to the third communication device or after the first communication device sends a NACK to the second communication device or after the NACK is sent to the third communication device, start a first timer of the SL process, and stop a second timer of the SL process; or, the processing unit 620 is configured to stop running or not starting the first timer of the SL process and/or stop running or not starting the second timer of the SL process when or after the first communication device sends an ACK to the third communication device.

In one possible implementation, the indicating, by the first communication device, to the second communication device that retransmission resources of the SL process have been requested, or that SL HARQ feedback of the SL process has been sent, includes: when the first communication device requests retransmission resources of a SL process to the third communication device or transmits NACK feedback of the SL process, or later, the first communication device indicates to the second communication device that retransmission resources of the SL process have been requested, or that SL HARQ feedback corresponding to the SL process has been transmitted to the third communication device.

In one possible implementation, the SL HARQ feedback is NACK.

In one possible implementation, the transceiver unit 610 is configured to: and when or after the second timer is started, sending third information to the third communication device, wherein the third information is used for indicating that the third communication device does not send the SL retransmission resource configuration of the SL new transmission or other SL processes or does not schedule the SL retransmission resource of the SL new transmission or other SL processes only during the operation of the second timer.

In one possible implementation, the transceiver unit 610 is further configured to: when or after the first communication device sends an ACK to the third communication device, the first timer for instructing the second communication device to stop running or not to start the SL process and/or the second timer to stop running or not to start the SL process are sent to the second communication device.

In a fifth embodiment, the communication apparatus may be the second communication device or a chip used in the second communication device, and then:

a processing unit 620, configured to, when or after a second communication device receives at least one second information from a first communication device, and/or the second communication device receives information from the first communication device indicating that retransmission resources of a SL process corresponding to the at least one second information have been requested or an indication of SL HARQ feedback of the SL process corresponding to the at least one second information has been sent, start a first timer of the SL process, and/or stop a second timer; or,

when or after the second communication device receives information from the first communication device, the information is used for indicating the second communication device to stop running or not starting the SL process, and/or stopping running or not starting the second timer of the SL process, the second communication device stops running or not starting the first timer and/or the second timer;

The first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission arrives, and the second timer is used for indicating the maximum duration required by receiving the resource allocation information or the authorization information of SL retransmission.

In one possible implementation, the SL HARQ feedback is NACK.

In one possible implementation, the processing unit 620 is configured to: when the HARQ feedback of the SL process is enabled and the second communication device does not successfully decode the SL data of the SL process, the first timer times out, and the second communication device starts the second timer; or when the HARQ feedback of the SL process is disabled, the first timer times out, and the second communication device starts the second timer.

In a sixth embodiment, the communication apparatus may be the first communication device or a chip used in the first communication device, then:

a transceiver unit 610, configured to send at least one second information to the second communication device; a processing unit 620, configured to start a first timer of a SL process corresponding to the at least one second information according to a physical side feedback channel PSFCH resource or a SL HARQ feedback corresponding to the at least one second information, and/or stop a second timer of the SL process, where the PSFCH resource is used for transmitting the HARQ feedback of the at least one second information; the first timer is configured to indicate a minimum duration before the resource configuration information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is configured to indicate a maximum duration required by the receiving end to receive the resource configuration information or the authorization information for SL retransmission.

In one possible implementation manner, according to the physical sidelink feedback channel PSFCH resource corresponding to the at least one second information, starting a first timer of the SL process corresponding to the at least one second information, and stopping a second timer of the SL process, including: starting a first timer of the SL process in a first symbol in the PSFCH resource and/or stopping a second timer of the SL process, or starting the first timer of the SL process and/or stopping the second timer of the SL process in the first symbol after the PSFCH resource ends.

In one possible implementation manner, according to the HARQ feedback corresponding to the at least one second information, starting a first timer of a SL process corresponding to the at least one second information, and stopping a second timer of the SL process, including: receiving HARQ feedback corresponding to the at least one piece of second information from the second communication device; and starting a first timer of the SL process and stopping a second timer of the SL process when the HARQ feedback is received or after the HARQ feedback is received.

In one possible implementation, HARQ feedback of the SL process is enabled.

In a seventh embodiment, the communication apparatus may be a second communication device or a chip used in the second communication device, and then:

A transceiver unit 610 for receiving at least one second information from the first communication device; a processing unit 620, configured to: and starting a first timer of the SL process corresponding to the at least one second information according to PSFCH resources or HARQ feedback corresponding to the at least one second information, and/or stopping a second timer of the SL process, wherein the PSFCH resources are used for transmitting the HARQ feedback of the at least one second information.

In one possible implementation manner, according to the PSFCH resource corresponding to the at least one second information, starting a first timer of the SL process corresponding to the at least one second information, and stopping a second timer of the SL process, including:

starting a first timer of the SL process and/or stopping a second timer of the SL process at a first symbol in the PSFCH resource; or, starting a first timer of the SL process and/or stopping a second timer of the SL process at a first symbol after the PSFCH resource ends.

In one possible implementation manner, according to the HARQ feedback corresponding to the at least one second information, starting a first timer of a SL process corresponding to the at least one second information, and stopping a second timer of the SL process, including: transmitting HARQ feedback of the at least one second information to the first communication device; and when the HARQ feedback is sent, or after the HARQ feedback is sent, or a first time domain symbol after the HARQ feedback is sent, starting a first timer of the SL process, and stopping a second timer of the SL process.

In one possible implementation, HARQ feedback of the SL process is enabled.

In an eighth embodiment, the communication apparatus may be a communication device or a chip used in a communication device, then:

a processing unit 620, configured to monitor, when the communication device configures SL discontinuous reception DRX and the communication device is in an SL active time, an SCI corresponding to at least one SL DRX; and/or when the SCI indicates one or the last SL transmission, SL data transmission, SL transmission opportunity, SL transmission of transmission opportunity, SL grant, or SL MAC PDU, starting a first timer on a SL process corresponding to the SCI, and/or stopping a second timer on a corresponding SL process; and/or if the SCI indicates a new SL transmission or SL data transmission, starting or restarting a third timer on the SL DRX corresponding to the SCI in the first symbol or slot after the SCI receives.

In one possible implementation, the monitoring for SL DRX in the SCI corresponding to at least one SL DRX may be SL connection, or SL DRX corresponding to SL connection.

In one possible implementation, starting a first timer on the SL process corresponding to the SCI and stopping a second timer on the corresponding SL process includes: after the transmission carrying the SL HARQ feedback is finished, a first timer is started on the SL process corresponding to the SCI, and/or a second timer on the corresponding SL process is stopped.

Optionally, the communication device 600 may further include a storage unit, where the storage unit is configured to store data or instructions (which may also be referred to as codes or programs), and the respective units may interact or be coupled with the storage unit to implement the corresponding methods or functions. For example, the processing unit 620 may read data or instructions in the storage unit, so that the communication device implements the method in the above embodiment.

It should be understood that the division of the units in the above apparatus is merely a division of a logic function, and may be fully or partially integrated into a physical entity or may be physically separated when actually implemented. And the units in the device can be all realized in the form of software calls through the processing element; or can be realized in hardware; it is also possible that part of the units are implemented in the form of software, which is called by the processing element, and part of the units are implemented in the form of hardware. For example, each unit may be a processing element that is set up separately, may be implemented as integrated in a certain chip of the apparatus, or may be stored in a memory in the form of a program, and the functions of the unit may be called and executed by a certain processing element of the apparatus. Furthermore, all or part of these units may be integrated together or may be implemented independently. The processing element described herein may in turn be a processor, which may be an integrated circuit with signal processing capabilities. In implementation, each step of the above method or each unit above may be implemented by an integrated logic circuit of hardware in a processor element or in the form of software called by a processing element.

In one example, the unit in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, for example: one or more specific integrated circuits (application specific integrated circuit, ASIC), or one or more microprocessors (digital singnal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA), or a combination of at least two of these integrated circuit forms. For another example, when the units in the apparatus may be implemented in the form of a scheduler of processing elements, the processing elements may be general-purpose processors, such as a central processing unit (central processing unit, CPU) or other processor that may invoke the program. For another example, the units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

The above transceiver unit 610 is an interface circuit of the apparatus for receiving signals from other apparatuses or transmitting signals to other apparatuses. For example, when the device is implemented in a chip, the transceiving unit 610 is an interface circuit of the chip for receiving signals from other chips or devices, or an interface circuit for transmitting signals to other chips or devices.

Referring to fig. 7, a schematic diagram of a communication device is provided in an embodiment of the present application. For realizing the operation of the first communication device, the second communication device, or the communication device in the above embodiments. As shown in fig. 7, the communication apparatus includes: processor 710 and interface 730, and optionally, memory 720. Interface 730 is used to enable communication with other devices.

The method performed by the first communication device, the second communication device, or the communication device in the above embodiments may be implemented by the processor 710 calling a program stored in a memory (which may be the memory 720 in the first communication device, the second communication device, or the communication device, or an external memory). That is, the first communication device, the second communication device, or the communication device may include a processor 710, and the processor 710 executes the method executed by the first communication device, the second communication device, or the communication device in the above method embodiment by calling a program in a memory. The processor here may be an integrated circuit with signal processing capabilities, such as a CPU. The first communication device, the second communication device, or the communication device may be implemented by one or more integrated circuits configured to implement the above methods. For example: one or more ASICs, or one or more microprocessor DSPs, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. Alternatively, the above implementations may be combined.

In particular, the functions/implementation of the transceiver unit 610 and the processing unit 620 in fig. 6 may be implemented by the processor 710 in the communication device 700 shown in fig. 7 invoking computer executable instructions stored in the memory 720. Alternatively, the functions/implementation procedure of the processing unit 610 in fig. 6 may be implemented by the processor 710 in the communication device 700 shown in fig. 7 invoking computer executable instructions stored in the memory 720, and the functions/implementation procedure of the transceiver unit 610 in fig. 6 may be implemented by the interface 730 in the communication device 700 shown in fig. 7.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

The present application also provides a computer readable medium having stored thereon a computer program which, when executed by a computer, performs the functions of any of the method embodiments described above.

The present application also provides a computer program product which, when executed by a computer, implements the functions of any of the method embodiments described above.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. that can be integrated with the available medium. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The various illustrative logical blocks and circuits described in the embodiments of the present application may be implemented or performed with a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the general purpose processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

The steps of a method or algorithm described in the embodiments of the present application may be embodied directly in hardware, in a software element executed by a processor, or in a combination of the two. The software cells may be stored in random access memory (random access memory, RAM), flash memory, read-only memory (ROM), EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In an example, a storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC.

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

In one or more exemplary designs, the functions described herein may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, the functions may be stored on a computer-readable medium or transmitted as one or more instructions or code on the computer-readable medium. Computer readable media includes both computer storage media and communication media that facilitate transfer of computer programs from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, such computer-readable media may include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that may be used to carry or store program code in the form of instructions or data structures and other data structures that may be read by a general or special purpose computer, or a general or special purpose processor. Further, any connection is properly termed a computer-readable medium, e.g., if the software is transmitted from a website, server, or other remote source via a coaxial cable, fiber optic computer, twisted pair, digital Subscriber Line (DSL), or wireless such as infrared, radio, and microwave, and is also included in the definition of computer-readable medium. The disks (disks) and disks (disks) include compact disks, laser disks, optical disks, digital versatile disks (digital versatile disc, DVD), floppy disk and blu-ray disk where disks usually reproduce data magnetically, while disks usually reproduce data optically with lasers. Combinations of the above may also be included within the computer-readable media.

Those of skill in the art will appreciate that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The foregoing embodiments have been provided for the purpose of illustrating the technical solution and advantageous effects of the present application in further detail, and it should be understood that the foregoing embodiments are merely illustrative of the present application and are not intended to limit the scope of the present application, and any modifications, equivalents, improvements, etc. made on the basis of the technical solution of the present application should be included in the scope of the present application. The foregoing description of the specification may enable any person skilled in the art to make or use the content of the application, and any modifications may be made based on the disclosure as will be apparent to the person skilled in the art, and the basic principles described herein may be applied to other variations without departing from the spirit and scope of the invention of the application. Thus, the disclosure is not limited to the embodiments and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the present application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to include such modifications and variations as well.

Claims

A method of communication, comprising:

the method comprises the steps that first communication equipment determines first information, wherein the first information is used for indicating second communication equipment to start a first timer and/or a second timer in a side uplink SL process corresponding to the first information, or not to start the first timer and/or the second timer; or, the first information is used for indicating that the second communication device requests or does not request retransmission resources for the SL process;

The first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is used for indicating the maximum duration required by the receiving end to receive the resource allocation information or the authorization information of SL retransmission;

the first communication device transmits the first information to the second communication device.
The method of claim 1, wherein the first information is used to instruct the second communication device to start the first timer and/or the second timer at the corresponding SL process, comprising:

the first information is used for indicating the second communication equipment to start the first timer and/or the second timer in the corresponding SL process when or after the second communication equipment receives or receives at least one second information;

the first information is used for indicating that the second communication device does not start the first timer and/or the second timer in the corresponding SL process, and includes:

the first information is used for indicating the second communication device not to start the first timer and/or the second timer in the corresponding SL process when or after the second communication device receives or finishes receiving the at least one second information.
The method of claim 1 or 2, wherein the first information is used to instruct the second communication device to request or not request retransmission resources for the corresponding SL process, comprising:

the first information is used for indicating that the second communication device requests or does not request retransmission resources for the corresponding SL process when the first communication device runs out of, sends or finishes sending the at least one second information.
A method according to any one of claims 1 to 3, wherein the first information is used to instruct the second communications device to request or not request retransmission resources for the SL process, comprising:

the first information is used for indicating to the second communication device that at least one first transmission requests or does not request retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent; or,

the first information is used to indicate to the second communication device that at least one first transmission is sending a SL negative acknowledgement, NACK, or a SL positive acknowledgement, ACK, to the third communication device when or after the at least one second information is used up, sent, or sent.
The method according to any of claims 1 to 4, wherein the first information is carried in side-uplink control information SCI, medium access control element MAC CE, or radio resource control RRC message.
The method of claim 5, wherein the first information includes at least a number or an identification of the SL process.
The method of any one of claims 1 to 6, further comprising:

the first communication device receives third information from a third communication device, the third information being used to indicate to the first communication device that at least one first transmission is requesting or not requesting retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent.
The method of claim 7, wherein the third information is carried in an RRC message or downlink control information, DCI.
The method of any one of claims 1 to 6, further comprising:

the first communication device determines that the first transmission requests or does not request retransmission resources from the third communication device when or after the first transmission runs out of, sends or sends the at least one second information;

the first communication device sends the indication information of the first transmission to the third communication device.
The method of claim 9, wherein the first communication device sending the indication of the first transmission to the third communication device comprises:

If the third communication device configures the first transmission for the first communication device through an RRC reconfiguration message, the first communication device sends an RRC reconfiguration complete message to the third communication device, wherein the RRC reconfiguration complete message carries indication information of the first transmission.
The method according to any of claims 4 to 10, wherein the first transmission is a SL radio bearer, SLRB, or a SL logical channel, LCH, or a SL procedure.
The method of any of claims 2 to 11, wherein the at least one second information comprises: all second information, or the last second information, or one second information.
The method of any of claims 2 to 12, wherein the at least one second information comprises:

the at least one second information during the current dynamic scheduling DG or the configuration scheduling CG; or alternatively

The at least one second information during one DG or CG.
The method according to any of claims 2 to 13, wherein the second information is SCI, or SL transmission opportunity, or SL grant, or SL medium access control protocol data unit MAC PDU.
The method according to any of claims 1 to 14, wherein the hybrid automatic repeat request, HARQ, feedback of the SL process is de-enabled.
A method of communication, comprising:

the second communication equipment receives first information from the first communication equipment, wherein the first information is used for indicating the second communication equipment to start a first timer and/or a second timer or not at a side uplink SL process corresponding to the first information; or, the first information is used for indicating that the second communication device requests or does not request retransmission resources for the SL process;

the second communication device determines to start a first timer and/or a second timer for a corresponding SL process according to the first information, or does not start the first timer and/or the second timer; the first timer is used for indicating the minimum duration before the arrival of the resource configuration information or the authorization information expected to be used for SL retransmission, and the second timer is used for indicating the maximum duration required by the receiving end to receive the resource configuration information or the authorization information of SL retransmission.
The method of claim 16, wherein the first information is used to instruct the second communication device to start the first timer and/or the second timer at the corresponding SL process, comprising:

The first information is used for indicating the second communication equipment to start the first timer and/or the second timer in the corresponding SL process when or after the second communication equipment receives or receives at least one second information;

the first information is used for indicating that the second communication device does not start the first timer and/or the second timer in the corresponding SL process, and includes:

the first information is used for indicating the second communication device not to start the first timer and/or the second timer in the corresponding SL process when or after the second communication device receives or finishes receiving the at least one second information.
The method of claim 16 or 17, wherein the first information is used to instruct the second communication device to request or not request retransmission resources for the corresponding SL process, comprising:

the first information is used for indicating that the second communication device requests or does not request retransmission resources for the corresponding SL process when the first communication device runs out of, sends or finishes sending the at least one second information.
The method of any of claims 16 to 18, wherein the first information is to instruct the second communication device to request or not request retransmission resources for the SL process, comprising:

The first information is used for indicating to the second communication device that at least one first transmission requests or does not request retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent; or,

the first information is used to indicate to the second communication device that at least one first transmission is sending a SL NACK or SL ACK to the third communication device when or after the at least one second information is used up, sent or sent.
The method according to any of the claims 16 to 19, wherein the first information is carried in side-uplink control information SCI, medium access control element MAC CE, or radio resource control RRC message.
The method of claim 20, wherein the first information includes at least a number or an identification of the SL process.
The method of any of claims 17 to 21, wherein the at least one second information comprises: all second information, or the last second information.
The method of any of claims 17 to 22, wherein the at least one second information comprises:

The at least one second information during the current dynamic scheduling DG or the configuration scheduling CG; or alternatively

The at least one second information during one DG or CG.
The method according to any of claims 17 to 23, wherein the second information is SCI, or SL transmission opportunity, or SL grant, or SL medium access control protocol data unit MAC PDU.
The method according to any of claims 16 to 24, wherein the hybrid automatic repeat request, HARQ, feedback of the SL process is de-enabled.
A method of communication, comprising:

the first condition is satisfied, and the first condition is: the first communication device transmitting a MAC PDU or SCI on the configured SL grant; or the first communication device receives a physical downlink control channel PDCCH transmitted by the third communication device indication SL;

the first communication device starts a third timer when or after sending the SL HARQ corresponding to the first condition to the third communication device, and/or stops a fourth timer, where the third timer is used to indicate a minimum duration before the resource configuration information or the authorization information expected to be used for SL retransmission arrives, and the fourth timer is used to indicate a maximum duration required by the receiving end to receive the resource configuration information or the authorization information for SL retransmission.
The method of claim 26, wherein the first communication device transmits a MAC PDU or SCI on a configured SL grant; or the first communication device receives a physical downlink control channel PDCCH from a third communication device indicating SL transmission, including:

when the first communication device adopts CG, the first communication device transmits MAC PDU or SCI on the configured SL authorization; or,

when the first communication device adopts DG, the first communication device receives a physical downlink control channel PDCCH from a third communication device indicating SL transmission.
The method according to claim 26 or 27, wherein the third timer comprises a third timer corresponding to the first condition and/or the fourth timer comprises a fourth timer corresponding to the first condition.
The method of any one of claims 26 to 28, further comprising

The third timer times out;

when a second condition is met, the first communication device starts the fourth timer.
The method of claim 29, wherein the second condition comprises at least one of:

the SL HARQ fed back to the third communication equipment by the first communication equipment is NACK;

The first communication device receives NACK feedback from the second communication device;

the first communication device does not successfully transmit SL data.
The method of claim 30, wherein the SL HARQ fed back by the first communication device to the third communication device is NACK; comprising the following steps:

and when the SL HARQ feedback corresponding to the first condition is de-enabled, the SL HARQ fed back to the third communication equipment by the first communication equipment is NACK.
The method of claim 30, wherein the first communication device receiving NACK feedback from a second communication device comprises:

and when the SL HARQ feedback corresponding to the first condition is enabled, the first communication equipment receives NACK feedback from the second communication equipment.
The method of claim 30, wherein the first communication device does not successfully transmit SL data, comprising:

and when the SL HARQ feedback corresponding to the first condition is de-enabled, the first communication equipment does not successfully send SL data.
A method of communication, comprising:

when a first communication device sends at least one second information to a second communication device, and/or the first communication device indicates to the second communication device retransmission resources of a SL process that has requested the at least one second information or HARQ feedback of the SL process has been sent, or later, the first communication device starts a first timer of the SL process, and/or stops a second timer of the SL process; or,

When or after the first communication device sends a positive determination ACK to a third communication device, the first communication device stops running or does not start the first timer of the SL process, and/or stops running or does not start the second timer of the SL process; or,

when the first communication device sends NACK to the third communication device or after the first communication device sends NACK to the second communication device or after the first communication device sends NACK, the first communication device starts a first timer of the SL process and/or stops a second timer of the SL process; or,

when the first communication device sends an ACK to the third communication device or after the first communication device sends an ACK to the second communication device, the first communication device stops running or does not start the first timer of the SL process, and/or stops running or does not start the second timer of the SL process;

the first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission arrives, and the second timer is used for indicating the maximum duration required by receiving the resource allocation information or the authorization information of SL retransmission.
The method of claim 34, wherein the first communication device indicating to the second communication device that retransmission resources for the SL process have been requested or that SL HARQ feedback for the SL process has been sent comprises:

when the first communication device requests retransmission resources of the SL process to the third communication device or sends NACK feedback of the SL process, or later, the first communication device indicates to the second communication device that retransmission resources of the SL process have been requested or that SL HARQ feedback corresponding to the SL process has been sent to the third communication device.
The method of claim 34 or 35, wherein the SL HARQ feedback is a NACK.
The method of any one of claim 34 to 36,

and if the HARQ feedback of the SL process is disabled, the first communication equipment starts the second timer when the first timer times out.
The method of claim 37, wherein a first communication device is configured to report resources for SL HARQ feedback to the third communication device.
The method of any one of claims 34 to 38, further comprising:

When or after the second timer is started, the first communication device sends third information to the third communication device, where the third information is used to instruct the third communication device to not send a SL retransmission resource configuration of a SL new transmission or other SL process or not schedule a SL retransmission resource of the SL new transmission or other SL process only during operation of the second timer.
The method of any one of claims 34 to 39, further comprising:

when or after the first communication device sends an ACK to the third communication device, the first communication device sends the first timer for instructing the second communication device to stop running or not to start the SL process, and/or the second timer to stop running or not to start the SL process.
The method of any of claims 34 to 39, wherein the at least one second information comprises: all second information, or the last second information, or one second information.
The method of any of claims 34 to 41, wherein the at least one second information comprises:

The at least one second information during the current DG or CG; or alternatively

The at least one second information during one DG or CG, the second information comprising SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.
A method according to any of claims 34 to 42, wherein HARQ feedback of the SL process is de-enabled.
A method of communication, comprising:

when or after a second communication device receives at least one second information from a first communication device and/or the second communication device receives information from the first communication device indicating that retransmission resources of a SL process corresponding to the at least one second information have been requested or an indication of SL HARQ feedback of the SL process corresponding to the at least one second information has been sent, the second communication device starts a first timer of the SL process and/or stops a second timer; or,

when or after the second communication device receives information from the first communication device, the information is used for indicating the second communication device to stop running or not starting the SL process, and/or stopping running or not starting the second timer of the SL process, the second communication device stops running or not starting the first timer and/or the second timer;

The first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission arrives, and the second timer is used for indicating the maximum duration required by receiving the resource allocation information or the authorization information of SL retransmission.
The method of claim 44, wherein the SL HARQ feedback is a NACK.
The method of claim 44 or 45, further comprising:

and if the HARQ feedback of the SL process is disabled, the second communication equipment starts the second timer when the first timer times out.
The method of claim 46, wherein the first communication device is configured to report resources for SL HARQ feedback to the third communication device.
The method of any of claims 44 to 47, wherein the at least one second information comprises: all second information, or the last second information, or one second information.
The method of any of claims 44 to 48, wherein the at least one second information comprises:

the at least one second information during the current DG or CG; or alternatively

The at least one second information during one DG or CG is SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.
A method according to any of claims 44 to 49, wherein HARQ feedback of the SL process is de-enabled.
A method of communication, comprising:

the first communication device sends at least one piece of second information to the second communication device;

the first communication device starts a first timer of a SL process corresponding to the at least one second information according to a physical sidelink feedback channel PSFCH resource or SL HARQ feedback corresponding to the at least one second information, and/or stops a second timer of the SL process, where the PSFCH resource is used for transmitting the HARQ feedback of the at least one second information;

the first timer is configured to indicate a minimum duration before the resource configuration information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is configured to indicate a maximum duration required by the receiving end to receive the resource configuration information or the authorization information for SL retransmission.
The method of claim 51, wherein the first communication device starts a first timer of a SL process corresponding to the at least one second message according to a physical sidelink feedback channel, PSFCH, resource corresponding to the at least one second message, and/or stops a second timer of the SL process, comprising:

The first communication device starts a first timer of the SL process and/or stops a second timer of the SL process in a first time domain symbol in the PSFCH resource; or,

the first communication device starts a first timer of the SL process and/or stops a second timer of the SL process at a first symbol after the PSFCH resource ends.
The method of claim 51 or 52, wherein the first communication device starts a first timer of a SL process corresponding to the at least one second message according to HARQ feedback corresponding to the at least one second message, and stops a second timer of the SL process, comprising:

and when the first communication equipment receives the HARQ feedback, or after the HARQ feedback, or a first time domain symbol after the HARQ feedback, starting a first timer of the SL process, and stopping a second timer of the SL process.
The method of any one of claims 51 to 53, wherein the at least one second information comprises: all second information, or the last second information, or one second information.
The method of any of claims 51 to 54, wherein the second information of the at least one comprises:

The at least one second information during the current DG or CG; or alternatively

The at least one second information during one DG or CG is SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.
A method according to any of claims 51 to 55, wherein HARQ feedback of the SL process is enabled.
A method of communication, comprising:

the second communication device receives at least one second information from the first communication device;

the second communication device starts a first timer of a SL process corresponding to the at least one second information according to a PSFCH resource or HARQ feedback corresponding to the at least one second information, and/or stops a second timer of the SL process, where the PSFCH resource is used for transmitting the HARQ feedback of the at least one second information;

the first timer is configured to indicate a minimum duration before the resource configuration information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is configured to indicate a maximum duration required by the receiving end to receive the resource configuration information or the authorization information for SL retransmission.
The method of claim 57, wherein the second communication device starts a first timer of a SL process corresponding to the at least one second message based on a PSFCH resource corresponding to the at least one second message, and/or stops a second timer of the SL process, comprising:

The second communication device starts a first timer of the SL process and stops a second timer of the SL process in a first time domain symbol in the PSFCH resource; or,

the second communication device starts a first timer of the SL process and/or stops a second timer of the SL process at a first symbol after the PSFCH resource ends.
The method of claim 58, wherein the second communication device starting a first timer of a SL process corresponding to the at least one second message based on HARQ feedback corresponding to the at least one second message, and stopping a second timer of the SL process, comprising:

the second communication device sending HARQ feedback of the at least one second information to the first communication device;

and when the second communication equipment sends the HARQ feedback, or after the HARQ feedback, or a first time domain symbol after the HARQ feedback, starting a first timer of the SL process, and stopping a second timer of the SL process.
The method of any one of claims 57 to 59, wherein the at least one second information comprises: all second information, or the last second information.
The method of any of claims 57 to 60, wherein the at least one second information comprises:

the at least one second information during the current DG or CG; or alternatively

The at least one second information during one DG or CG is SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.
A method according to any one of claims 57 to 61, characterized in that HARQ feedback of the SL process is enabled.
A communication device, comprising:

the processing unit is used for determining first information, wherein the first information is used for indicating the second communication equipment to start a first timer and/or a second timer or not at the side uplink SL process corresponding to the first information; or, the first information is used for indicating that the second communication device requests or does not request retransmission resources for the SL process;

the first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is used for indicating the maximum duration required by the receiving end to receive the resource allocation information or the authorization information of SL retransmission;

And the receiving and transmitting unit is used for transmitting the first information to the second communication equipment.
The apparatus of claim 63, wherein the first information is used to instruct the second communication device to start the first timer and/or the second timer at the corresponding SL process, comprising:

the first information is used for indicating the second communication equipment to start the first timer and/or the second timer in the corresponding SL process when or after the second communication equipment receives or receives at least one second information;

the first information is used for indicating that the second communication device does not start the first timer and/or the second timer in the corresponding SL process, and includes:

the first information is used for indicating the second communication device not to start the first timer and/or the second timer in the corresponding SL process when or after the second communication device receives or finishes receiving the at least one second information.
The apparatus of claim 63 or 64, wherein the first information for indicating whether the second communication device requests or does not request retransmission resources for the corresponding SL process comprises:

the first information is used for indicating that the second communication device requests or does not request retransmission resources for the corresponding SL process when the first communication device runs out of, sends or finishes sending the at least one second information.
The apparatus of any one of claims 63-65, wherein the first information to instruct the second communication device to request or not request retransmission resources for the SL process comprises:

the first information is used for indicating to the second communication device that at least one first transmission requests or does not request retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent; or,

the first information is used to indicate to the second communication device that at least one first transmission is sending a SL negative acknowledgement, NACK, or a SL positive acknowledgement, ACK, to the third communication device when or after the at least one second information is used up, sent, or sent.
The apparatus according to any of claims 63 to 66, wherein the first information is carried in side-uplink control information SCI, medium access control element MAC CE, or radio resource control RRC message.
The apparatus of claim 67, wherein the first information includes at least a number or identification of the SL process.
The apparatus of any one of claims 63 to 68, wherein the transceiver unit is further configured to:

And receiving third information from a third communication device, wherein the third information is used for indicating that at least one first transmission is used up, sent or after the at least one second information is sent to the first communication device, and requesting or not requesting retransmission resources from the third communication device.
The apparatus of claim 69, wherein the third information is carried in an RRC message or downlink control information, DCI.
The apparatus of any one of claims 63 to 68, wherein the processing unit is further configured to determine that the first transmission requests or does not request retransmission resources from the third communication device when or after the at least one second information is used up, sent, or sent; and the receiving and transmitting unit is also used for sending the indication information of the first transmission to the third communication equipment.
The apparatus of claim 71, wherein the sending the indication of the first transmission to the third communication device comprises:

and if the third communication equipment configures the first transmission for the first communication equipment through an RRC reconfiguration message, sending an RRC reconfiguration completion message to the third communication equipment, wherein the RRC reconfiguration completion message carries the indication information of the first transmission.
The apparatus of any one of claims 66-72, wherein the first transmission is a SL radio bearer, SLRB, or a SL logical channel, LCH, or a SL process.
The apparatus of any one of claims 64 to 73, wherein the at least one second information comprises: all second information, or the last second information, or one second information.
The apparatus of any one of claims 64 to 74, wherein the at least one second information comprises:

the at least one second information during the current dynamic scheduling DG or the configuration scheduling CG; or alternatively

The at least one second information during one DG or CG.
The apparatus of any of claims 64 to 75, wherein the second information is a SCI, or a SL transmission opportunity, or a SL grant, or a SL medium access control protocol data unit, MAC PDU.
The apparatus of any one of claims 63-76, wherein hybrid automatic repeat request, HARQ, feedback for the SL process is de-enabled.
A communication device, comprising:

a transceiver unit for receiving first information from a first communication device;

The processing unit is used for determining to start a first timer and/or a second timer for a corresponding SL process or not to start the first timer and/or the second timer according to the first information; or determining whether to request or not request retransmission resources in a corresponding SL process, wherein the first timer is used for indicating the minimum time length before the arrival of the resource configuration information or the authorization information expected to be used for SL retransmission, and the second timer is used for indicating the maximum time length required by the receiving end to receive the resource configuration information or the authorization information of SL retransmission.
The apparatus of claim 78, wherein the first information is used to instruct the second communication device to start the first timer and/or the second timer at the corresponding SL process, comprising:

the first information is used for indicating the second communication equipment to start the first timer and/or the second timer in the corresponding SL process when or after the second communication equipment receives or receives at least one second information;

the first information is used for indicating that the second communication device does not start the first timer and/or the second timer in the corresponding SL process, and includes:

The first information is used for indicating the second communication device not to start the first timer and/or the second timer in the corresponding SL process when or after the second communication device receives or finishes receiving the at least one second information.
The apparatus of claim 78 or 79, wherein the first information for indicating whether the second communication device requests or does not request retransmission resources for the corresponding SL process, comprises:

the first information is used for indicating that the second communication device requests or does not request retransmission resources for the corresponding SL process when the first communication device runs out of, sends or finishes sending the at least one second information.
The apparatus of any one of claims 78-80, wherein the first information to instruct the second communication device to request or not request retransmission resources for the SL process comprises:

the first information is used for indicating to the second communication device that at least one first transmission requests or does not request retransmission resources from the third communication device when or after the at least one second information is used up, sent or sent; or,

the first information is used to indicate to the second communication device that at least one first transmission is sending a SL NACK or SL ACK to the third communication device when or after the at least one second information is used up, sent or sent.
The apparatus according to any of claims 78 to 81, wherein the first information is carried in side-uplink control information, SCI, medium access control element, MAC CE, or radio resource control, RRC, message.
The apparatus of claim 82, wherein the first information comprises at least a number or an identification of the SL process.
The apparatus of any one of claims 79 to 83, wherein the at least one second information comprises: all second information, or the last second information.
The apparatus of any one of claims 79 to 84, wherein the at least one second information comprises:

the at least one second information during the current dynamic scheduling DG or the configuration scheduling CG; or alternatively

The at least one second information during one DG or CG.
The apparatus of any one of claims 79 to 85, wherein the second information is a SCI, or a SL transmission opportunity, or a SL grant, or a SL medium access control protocol data unit, MAC PDU.
The apparatus of any of claims 78-86, wherein hybrid automatic repeat request, HARQ, feedback for the SL process is de-enabled.
A communication device, comprising:

the processing unit is used for meeting a first condition, and the first condition is that: the first communication device transmitting a MAC PDU or SCI on the configured SL grant; or the first communication device receives a physical downlink control channel PDCCH transmitted by the third communication device indication SL;

and the receiving and transmitting unit is used for starting a third timer and/or stopping a fourth timer when or after the SL HARQ corresponding to the first condition is transmitted to the third communication equipment, the third timer is used for indicating the minimum time before the resource configuration information or the authorization information expected to be used for SL retransmission arrives, and the fourth timer is used for indicating the maximum time required by the receiving end to receive the resource configuration information or the authorization information of SL retransmission.
The apparatus of claim 88, wherein the first communication device sends a MAC PDU or SCI on a configured SL grant; or, the receiving the physical downlink control channel PDCCH from the third communications device to instruct SL transmission includes:

when the first communication device adopts CG, sending MAC PDU or SCI on configured SL authorization; or,

And when the first communication equipment adopts DG, receiving a physical downlink control channel PDCCH from a third communication equipment to instruct SL transmission.
The apparatus of claim 88 or 89, wherein the third timer comprises a third timer corresponding to the first condition and/or the fourth timer comprises a fourth timer corresponding to the first condition.
The apparatus of any one of claims 88 to 90, further comprising

The third timer times out;

when a second condition is met, the first communication device starts the fourth timer.
The apparatus of claim 91, wherein the second condition comprises at least one of:

the SL HARQ fed back to the third communication equipment by the first communication equipment is NACK;

the first communication device receives NACK feedback from the second communication device;

the first communication device does not successfully transmit SL data.
The apparatus of claim 92, wherein the SL HARQ feedback to the third communication device is NACK; comprising the following steps:

and when the SL HARQ feedback corresponding to the first condition is de-enabled, the SL HARQ fed back to the third communication equipment is NACK.
The apparatus of claim 92, wherein the receiving NACK feedback from the second communication device comprises:

and receiving NACK feedback from the second communication equipment when the SL HARQ feedback corresponding to the first condition is enabled.
The apparatus of claim 92, wherein the unsuccessful transmission of SL data comprises:

and when the SL HARQ feedback corresponding to the first condition is disabled, the SL data is not successfully transmitted.
A communication device, comprising:

a processing unit, configured to start a first timer of a SL process and/or stop a second timer of the SL process when at least one second information is transmitted to a second communication device and/or retransmission resources of the SL process that have requested the at least one second information or HARQ feedback of the SL process has been transmitted are indicated to the second communication device or after the at least one second information is transmitted; or,

stopping running or not starting the first timer of the SL process and/or stopping running or not starting the second timer of the SL process when or after a positive determination ACK is sent to a third communication device; or,

when or after transmitting NACK to the third communication device, when or after transmitting NACK to the second communication device, the first communication device starts a first timer of the SL process and/or stops a second timer of the SL process; or,

When or after sending an ACK to the third communication device, or when or after sending an ACK to the second communication device, the first communication device stops running or does not start the first timer of the SL process, and/or stops running or does not start the second timer of the SL process;

the first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission arrives, and the second timer is used for indicating the maximum duration required by receiving the resource allocation information or the authorization information of SL retransmission.
The apparatus of claim 96, wherein the indicating to the second communication device that retransmission resources for the SL process have been requested, or that SL HARQ feedback for the SL process has been sent, comprises:

and when the retransmission resource of the SL process is requested to the third communication equipment or NACK feedback of the SL process is sent or later, indicating that the retransmission resource of the SL process is requested to the second communication equipment or SL HARQ feedback corresponding to the SL process is sent to the third communication equipment.
The apparatus of claim 96 or 97, wherein the SL HARQ feedback is a NACK.
The apparatus of any one of claims 96 to 98,

and if the HARQ feedback of the SL process is disabled, starting the second timer when the first timer times out.
The apparatus of claim 99, wherein the communication means is configured to report resources for SL HARQ feedback to the third communication device.
The apparatus of any one of claims 96 to 100, further comprising:

and the receiving and transmitting unit is used for sending third information to the third communication device when or after the second timer is started, wherein the third information is used for indicating that the third communication device does not send the SL retransmission resource configuration of the SL new transmission or other SL processes or does not schedule the SL retransmission resources of the SL new transmission or other SL processes only during the operation of the second timer.
The apparatus of any one of claims 96 to 101, wherein the processing unit is further configured to:

when or after sending an ACK to the third communication device, sending the first timer for instructing the second communication device to stop running or not to start the SL process, and/or the second timer to stop running or not to start the SL process, to the second communication device.
The apparatus of any one of claims 96 to 101, wherein the at least one second information comprises: all second information, or the last second information, or one second information.
The apparatus of any one of claims 100 to 103, wherein the at least one second information comprises:

the at least one second information during the current DG or CG; or alternatively

The at least one second information during one DG or CG, the second information comprising SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.
The apparatus of any of claims 96-104, wherein HARQ feedback of the SL process is de-enabled.
A communication device, comprising:

a processing unit, configured to, when or after receiving at least one second information from a first communication device, and/or receiving information from the first communication device indicating that retransmission resources of a SL process corresponding to the at least one second information have been requested or an indication of SL HARQ feedback of the SL process corresponding to the at least one second information has been sent, start a first timer of the SL process, and/or stop a second timer; or,

Stopping running or not starting the first timer and/or the second timer when or after receiving information from the first communication device indicating that the second communication device stops running or does not start the SL process and/or stopping running or not starting the second timer of the SL process;

the first timer is used for indicating the minimum duration before the resource allocation information or the authorization information expected to be used for SL retransmission arrives, and the second timer is used for indicating the maximum duration required by receiving the resource allocation information or the authorization information of SL retransmission.
The apparatus of claim 106, wherein the SL HARQ feedback is a NACK.
The apparatus of claim 106 or 107, wherein the processing unit is further configured to:

and if the HARQ feedback of the SL process is disabled, starting the second timer when the first timer times out.
The apparatus of claim 108, wherein the first communication device is configured to report resources for SL HARQ feedback to the third communication device.
The apparatus of any one of claims 106 to 109, wherein the at least one second information comprises: all second information, or the last second information, or one second information.
The apparatus of any one of claims 106 to 110, wherein the at least one second information comprises:

the at least one second information during the current DG or CG; or alternatively

The at least one second information during one DG or CG is SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.
The apparatus of any of claims 106 to 111, wherein HARQ feedback of the SL process is de-enabled.
A communication device, comprising:

a transceiver unit for transmitting at least one second information to the second communication device;

a processing unit, configured to start a first timer of a SL process corresponding to the at least one second information according to a physical side feedback channel PSFCH resource or a SL HARQ feedback corresponding to the at least one second information, and/or stop a second timer of the SL process, where the PSFCH resource is used for transmitting the HARQ feedback of the at least one second information;

the first timer is configured to indicate a minimum duration before the resource configuration information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is configured to indicate a maximum duration required by the receiving end to receive the resource configuration information or the authorization information for SL retransmission.
The apparatus as recited in claim 113, wherein said starting a first timer of a SL process corresponding to said at least one second information based on physical side feedback channel, PSFCH, resources corresponding to said at least one second information, and/or stopping a second timer of said SL process comprises:

starting a first timer of the SL process and/or stopping a second timer of the SL process at a first time domain symbol in the PSFCH resource; or,

a first symbol after the end of the PSFCH resource, a first timer to start the SL process, and/or a second timer to stop the SL process.
The apparatus of claim 113 or 114, wherein the starting the first timer of the SL process corresponding to the at least one second information based on the HARQ feedback corresponding to the at least one second information, and stopping the second timer of the SL process, comprises:

and starting a first timer of the SL process and stopping a second timer of the SL process when the HARQ feedback is received or after the HARQ feedback is received.
The apparatus of any one of claims 113-115, wherein the at least one second information comprises: all second information, or the last second information, or one second information.
The apparatus of any one of claims 113-116, wherein the second information of the at least one comprises:

the at least one second information during the current DG or CG; or alternatively

The at least one second information during one DG or CG is SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.
The apparatus of any of claims 113-117, wherein HARQ feedback of the SL process is enabled.
A communication device, comprising:

a transceiver unit for receiving at least one second information from the first communication device;

a processing unit, configured to start a first timer of a SL process corresponding to the at least one second information according to a PSFCH resource or HARQ feedback corresponding to the at least one second information, and/or stop a second timer of the SL process, where the PSFCH resource is used to transmit the HARQ feedback of the at least one second information;

the first timer is configured to indicate a minimum duration before the resource configuration information or the authorization information expected to be used for SL retransmission reaches the receiving end, and the second timer is configured to indicate a maximum duration required by the receiving end to receive the resource configuration information or the authorization information for SL retransmission.
The apparatus of claim 119, wherein the starting a first timer of the SL process corresponding to the at least one second information and/or stopping a second timer of the SL process based on the PSFCH resource corresponding to the at least one second information comprises:

starting a first timer of the SL process and stopping a second timer of the SL process in a first time domain symbol in the PSFCH resource; or,

a first symbol after the end of the PSFCH resource, a first timer to start the SL process, and/or a second timer to stop the SL process.
The apparatus of claim 119, wherein the starting the first timer of the SL process corresponding to the at least one second message based on the HARQ feedback corresponding to the at least one second message, and stopping the second timer of the SL process, comprises:

transmitting HARQ feedback of the at least one second information to the first communication device;

and when the HARQ feedback is sent, or after the HARQ feedback is sent, or a first time domain symbol after the HARQ feedback is sent, starting a first timer of the SL process, and stopping a second timer of the SL process.
The apparatus of any one of claims 119-121, wherein the at least one second information comprises: all second information, or the last second information.
The apparatus of any one of claims 119-122, wherein the at least one second information comprises:

the at least one second information during the current DG or CG; or alternatively

The at least one second information during one DG or CG is SCI, or SL transmission opportunity, or SL grant, or SL MAC PDU.
The apparatus of any one of claims 119-123, wherein HARQ feedback for the SL process is enabled.
A communication device, comprising:

a processor, the memory being coupled to the processor, the memory being for storing program instructions, the processor being for executing the program instructions to implement the method of any one of claims 1 to 62.
A computer program product comprising instructions which, when run on a computer, implement the method of any one of claims 1 to 62.
A computer readable storage medium having instructions stored thereon which, when executed on a computer, implement the method of any of claims 1 to 62.
A communication system comprising a first communication device for performing the method of any of the preceding claims 1 to 15 and/or a second communication device for performing the method of any of the preceding claims 16 to 25; or comprises a first communication device for performing the method of any of the preceding claims 34 to 43 and/or a second communication device for performing the method of any of the preceding claims 44 to 50; or comprises a first communication device for performing the method of any of the preceding claims 51 to 56 and/or a second communication device for performing the method of any of the preceding claims 57 to 62.