WO2024093792A1

WO2024093792A1 - Timer operating method and apparatus

Info

Publication number: WO2024093792A1
Application number: PCT/CN2023/126855
Authority: WO
Inventors: 梁敬; 黎建辉
Original assignee: 维沃移动通信有限公司
Priority date: 2022-11-04
Filing date: 2023-10-26
Publication date: 2024-05-10
Also published as: CN117998334A

Abstract

The present application relates to the field of communications, and discloses a timer operating method and apparatus. The timer operating method of embodiments of the present application comprises: at a moment corresponding to a physical sidelink feedback channel (PSFCH), a first communication device starts a first timer; and after the first timer times out, the first communication device starts a second timer, wherein the first timer comprises a sidelink discontinuous reception hybrid automatic repeat request feedback timer sl-drx-HARQ-RTT-Timer, and the second timer comprises a sidelink discontinuous reception retransmission timer sl-drx-RetransmissionTimer.

Description

Timer operation method and device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application No. 202211380055.0 filed in China on November 4, 2022, the entire contents of which are incorporated herein by reference.

Technical Field

The present application belongs to the field of communication technology, and specifically relates to a timer operation method and device.

Background technique

The purpose of discontinuous reception (DRX) is to save power. A terminal in DRX state does not need to connect to the monitoring control channel.

In order to support the DRX mechanism, the base station will configure DRX-related timers for the terminal; however, in the sidelink (SL) DRX, the start of the hybrid automatic repeat request (HARQ) round trip time (RTT) timer and the configuration of the physical sidelink feedback channel (PSFCH) are closely related; if the DRX-related timer in SL DRX runs at an inappropriate time or fails to start in time when it needs to run, the terminal will not be able to send and receive data or signaling correctly.

Summary of the invention

The embodiments of the present application provide a timer operation method and device, which can solve the problem that the DRX-related timer in SL DRX runs at an inappropriate time or fails to start in time when it needs to run, resulting in the terminal being unable to correctly send and receive data or signaling.

In a first aspect, a timer operation method is provided, the method comprising:

At a time corresponding to the physical secondary link feedback channel PSFCH, the first communication device starts a first timer;

After the first timer times out, the first communication device starts a second timer;

The first timer includes a side-link discontinuous reception hybrid automatic repeat feedback timer sl-drx-HARQ-RTT-Timer, and the second timer includes a side-link discontinuous reception retransmission timer sl-drx-RetransmissionTimer.

In a second aspect, a timer operation device is provided, comprising:

A first starting module, used for starting a first timer at a time corresponding to a physical secondary link feedback channel PSFCH;

A second starting module, used for starting a second timer after the first timer times out;

According to a third aspect, a first communication device is provided, comprising a processor and a memory, wherein the memory stores a program or instruction executable on the processor, and the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

In a fourth aspect, a first communication device is provided, including a processor and a communication interface, wherein the processor is configured to:

In a fifth aspect, a timer operation system is provided, comprising: a source communication device, a relay device and a target communication device; wherein the source communication device is a first communication device, or the target communication device is a first communication device, and the first communication device can be used to execute the first communication device method as described in the first aspect.

In a sixth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the method described in the first aspect is implemented.

In a seventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect.

In an eighth aspect, a computer program/program product is provided. The computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the method as described in the first aspect.

In the embodiment of the present application, by determining to start the sl-drx-HARQ-RTT-Timer at the time corresponding to the PSFCH, and determining to start the sl-drx-RetransmissionTimer after the sl-drx-HARQ-RTT-Timer timer expires, it is clear The start time of the DRX related timer in the SL DRX is improved, and the reliability of data transmission or signaling transmission and reception of the terminal is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied;

FIG2 is a schematic diagram of a DRX cycle provided by a related art;

FIG3 is a second schematic diagram of a DRX cycle provided by the related art;

FIG4 is a schematic diagram of a flow chart of a timer operation method provided in an embodiment of the present application;

FIG5 is a schematic diagram of a timer operation method according to an embodiment of the present application;

FIG6 is a second schematic diagram of a timer operation method provided in an embodiment of the present application;

FIG7 is a third schematic diagram of a timer operation method provided in an embodiment of the present application;

FIG8 is a fourth schematic diagram of a timer operation method provided in an embodiment of the present application;

FIG9 is a schematic diagram of the structure of a timer operation device provided in an embodiment of the present application;

FIG10 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

FIG11 is a schematic diagram of the hardware structure of a first communication device implementing an embodiment of the present application.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and/or" in the specification and claims represents at least one of the connected objects, and the character "/" generally represents that the objects associated with each other are in an "or" relationship.

It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE)/LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as other systems and radio technologies. The following description describes a new radio (NR) system for example purposes, and NR terms are used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the ^6th Generation (6G) communication system.

FIG1 shows a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/virtual reality (virtual reality, VR) device, a robot, a wearable device (Wearable Device), a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (personal computer, PC), a teller machine or a self-service machine and other terminal side devices, and the wearable device includes: a smart watch, a smart bracelet, a smart headset, a smart glasses, a smart jewelry (smart bracelet, a smart bracelet, a smart ring, a smart necklace, a smart anklet, a smart anklet, etc.), a smart wristband, a smart clothing, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (RAN), a radio access network function or a radio access network unit. The access network device 12 may include a base station, a WLAN access point or a WiFi node, etc. The base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home node B, a home evolved node B, a transmitting and receiving point (TRP) or other appropriate terms in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary, it should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited. The core network equipment may include but is not limited to at least one of the following: a core network node, a core network function, a mobility management entity (MME), an access mobility management function (AMF), a session management function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized Network Configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), Binding Support Function (BSF), Application Function (AF), etc. It should be noted that in the embodiment of the present application, only the core network device in the NR system is used as an example for introduction, and the specific type of the core network device is not limited.

First, the following contents are introduced:

(1) sidelink;

The Long Term Evolution (LTE) system can support a sidelink (also called a side link or edge link, etc.) for direct data transmission between user equipment (UE) (such as terminals) without going through network equipment.

The UE sends Sidelink Control Information (SCI) through the Physical Sidelink Control Channel (PSCCH) to schedule the transmission of the Physical Sidelink Shared Channel (PSSCH) to send data. The transmission is carried out in the form of broadcast, and the receiving end does not feedback to the sending end whether the reception is successful.

LTE sidelink design supports two resource allocation modes, namely scheduled resource allocation mode and autonomous resource selection mode. The former is controlled by the network side equipment and allocates resources to each UE, while the latter is for the UE to autonomously select resources.

LTE can support sidelink carrier aggregation (CA). LTE sidelink CA is different from the Uu interface (i.e. downlink and uplink), and there is no distinction between primary component carrier (PCC) and secondary component carrier (SCC). UE in autonomous resource selection mode independently performs resource sensing and resource reservation on each CC.

LTE sidelink is designed for specific public safety matters (such as emergency communications in disaster sites such as fires or earthquakes), or vehicle-to-everything (V2X) communications. Vehicle-to-everything communications include various services, such as basic safety communications, advanced (autonomous) driving, platooning, sensor expansion, etc. Since LTE sidelink only supports broadcast communications, it is mainly used for basic safety communications, and other advanced V2X services will be supported through NR sidelink.

The 5G NR system can be used in operating frequency bands above 6 GHz that are not supported by LTE, and supports a larger operating bandwidth. The NR system can support the interface between base stations and terminals, but does not yet support the Sidelink interface for direct communication between terminals.

Specifically, in the ProSe network architecture, the communication interface between terminals is called the PC5 interface, and the interface connecting the terminal to access network equipment such as E-UTRAN is called the Uu interface.

(2) Sidelink transmission mode;

The current sidelink transmission is mainly divided into broadcast, groupcast, and unicast transmission forms. Unicast can be one-to-one transmission. Multicast can be one-to-many transmission. Broadcast can be one-to-many transmission, but broadcast does not have the concept of UE belonging to the same group.

In the related art, Sidelink unicast and multicast communications support a physical layer HARQ feedback mechanism.

NR sidelink defines two modes, one is mode 1, where the base station schedules resources, and the other is mode 2, where the UE can decide what resources to use for transmission. At this time, the resource information may come from the base station's broadcast message or pre-configuration. If the UE works within the base station range and has an RRC connection with the base station, it can be mode 1 and/or mode 2. If the UE works within the base station range but has no RRC connection with the base station, it can only work in mode 2. If the UE is outside the base station range, it can only work in mode 2 and perform V2X transmission according to the pre-configured information. Mode 2 can also be further divided into 2a, 2b, 2c, and 2d.

(3) Resource pool;

In related technologies, there is a concept of "resource pool" during V2X transmission. The resource pool is sent or pre-configured by the network side. The resource pool contains the resources used for transmission and many transmission-related parameters. For example, in LTE, it includes the offset value of the first subframe of the resource pool, the bitmap corresponding to the resource pool, whether PSCCH and PSSCH will be transmitted in adjacent RBs, the number of subchannels and the size of each subchannel, as well as the minimum RB index value corresponding to the subchannel, the minimum RB index value corresponding to the PSCCH pool, the S-RSSI threshold of CBR measurement, area identification, etc.

In the related technology, in addition to configuring a normal transmission resource pool for the UE, the network side can also configure an exceptional resource pool (exceptional pool). The exceptional resource pool is used in some special situations, such as during the switching process, or when RLF (radio link failure) occurs, or during the transition from IDLE to CONNECTED state, etc.

For UEs in different network coverage areas, resource pools and corresponding resources can be selected based on network scheduling, or resource pools can be selected autonomously based on pre-configuration. The selection of resource pools may need to take into account the area where the UE is located, and select resource pools related to the area where the UE is located. When autonomously selecting resources in a resource pool, it is mainly based on Sensing mechanism, or it may be a random selection (such as the selection of resources in an abnormal resource pool).

(4)DRX in RRC connected state under Uu interface;

If the terminal does not monitor the control channel for a long time, once data arrives, the data transmission delay will increase. In order to balance power saving and transmission delay, 5G MAC supports two DRX cycles, DRX long cycle and DRX short cycle, according to the length of time the terminal monitors the channel. If the terminal data volume is predicted to arrive frequently or the service is sensitive to latency, the network can configure the terminal to use the DRX short cycle; if the terminal data volume is predicted to be sparse and not sensitive to latency, the network can configure the terminal to use only the DRX long cycle. In order to facilitate the terminal to switch between the DRX long cycle and the DRX short cycle, the DRX long cycle can be required to be an integer multiple of the DRX short cycle, so as to ensure that the continuous monitoring time (onDuration) of the two is aligned.

In order to support the DRX mechanism, the base station configures DRX-related timers and parameters for the terminal, which may include at least one of the following:

drx-LongCycleStartOffset: used to configure the period and offset of the long DRX cycle. The units of period and offset are milliseconds.

drx-ShortCycle: used to configure the period and offset of the short DRX cycle. The unit of period and offset is milliseconds.

drx-ShortCycleTimer: used to control the duration of the terminal using the short DRX cycle, the unit is an integer, indicating that once the terminal enters the short DRX cycle, it must maintain the integer multiple of the short cycle;

drx-onDurationTimer: DRX continuous monitoring timer. During the operation of this timer, the terminal needs to continuously monitor the PDCCH control channel of the network. The timer unit is milliseconds;

drx-SlotOffset: The delay of the terminal starting or restarting drx-onDurationTimer. This parameter is used to set the offset of the start time of DRX onDuration relative to the start point of the subframe. The offset is an integer multiple of 1/32 milliseconds.

drx-InactivityTimer: DRX inactivity timer. This timer is started or restarted at the first symbol after the terminal receives the PDCCH signaling for new uplink/downlink data scheduling. During the operation of this timer, the terminal needs to continuously monitor the control channel. The unit of this timer is milliseconds;

drx-HARQ-RTT-TimerDL: Downlink HARQ RTT timer, maintained on a per-downlink process basis, with the timer length being the minimum time interval between the HARQ feedback moment and the receipt of the HARQ retransmission for the process. The terminal will start or restart the timer in the first symbol after the HARQ NACK feedback of the process only if the data corresponding to the downlink process is not decoded successfully. If the current terminal only has drx-HARQ-RTT-TimerDL and/or drx-HARQ-RTT-TimerUL running, the terminal does not need to monitor the PDCCH control channel, and the timer unit is symbol;

drx-HARQ-RTT-TimerUL: Uplink HARQ RTT timer, maintained on a per-uplink process basis. The length of this timer is the minimum time interval between the PUSCH transmission moment and the receipt of the HARQ retransmission for the process. After the uplink PUSCH transmission, the terminal starts or restarts the uplink HARQ RTT timer for the uplink process. If the PUSCH transmission uses PUSCH repetition, the uplink HARQ RTT timer is started or restarted after the first PUSCH repetition to ensure that the base station can terminate the PUSCH repetition transmission in time after parsing the PUSCH in advance. The timer unit is symbol;

drx-RetransmissionTimerDL: Downlink retransmission timer. The next symbol after drx-HARQ-RTT-TimerDL times out starts or restarts the timer. During the operation of the timer, the terminal monitors the control channel of the network. If it receives downlink scheduling information for the process or a downlink configured grant, it stops the timer. The timer unit is time slot;

drx-RetransmissionTimerUL: Uplink retransmission timer. The next symbol after drx-HARQ-RTT-TimerUL times out starts or restarts the timer. During the operation of the timer, the terminal monitors the control channel of the network. If it receives uplink scheduling information or uplink configured grant for the process, it stops running. The timer unit is time slot.

The above-mentioned basic mechanism of DRX and the related parameters involved can constitute a DRX configuration, and the UE can perform corresponding discontinuous reception operations according to the configuration. FIG2 is one of the schematic diagrams of the DRX cycle provided by the related technology, and FIG3 is the second schematic diagram of the DRX cycle provided by the related technology. As shown in FIG2 and FIG3, in the time domain, time is divided into continuous DRX cycles. The operation mechanism of the DRX-related timer in SL DRX is not clear in the related technology.

It should be noted that the DRX-related timers in the SL DRX scenario in this application can be started by the receiving end (target communication device) in the SL link, or by the sending end (source communication device) in the SL link, and this application does not make any specific limitations on this.

The timer operation method and device provided in the embodiments of the present application are described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

FIG. 4 is a flow chart of a timer operation method provided in an embodiment of the present application. As shown in FIG. 4 , the method includes the following steps:

Step 400, at a time corresponding to a physical secondary link feedback channel PSFCH, the first communication device starts a first timer;

Optionally, the first communication device may be any terminal in the SL.

Optionally, the first communication device may be a receiving end.

Optionally, the first communication device may be a transmitting end.

Optionally, the first communication device may be a UE at the receiving end.

Optionally, the first communication device may be a UE at the transmitting end.

Optionally, PSFCH resources can be pre-configured through Radio Resource Control (RRC).

Optionally, the network side may configure a PSFCH resource for the first communication device through RRC.

Optionally, when the first communication device is configured with only one PSFCH resource, the first communication device may start the first timer at a time corresponding to the PSFCH.

Optionally, the network side may configure multiple PSFCH resources for the first communication device through RRC.

Optionally, when the first communication device is configured with multiple PSFCH resources, the first communication device may start the first timer at a time corresponding to at least one of the multiple PSFCHs, that is, may start the first timer at least once.

Optionally, the first timer may include a sub-link discontinuous reception hybrid automatic repeat transmission feedback timer sl-drx-HARQ-RTT-Timer, or any timer or other setting having similar functions to the sl-drx-HARQ-RTT-Timer, which is not limited in this embodiment of the present application.

Optionally, the first timer may be used to define: per Sidelink process except for the broadcast transmission: the minimum duration before an SL HARQ retransmission is expected bv the MAC entity.

Step 410: After the second timer times out, the first communication device starts a second timer.

Optionally, the second timer may include a side link discontinuous reception retransmission timer sl-drx-RetransmissionTimer, or any timer or other setting having similar functions to the sl-drx-RetransmissionTimer, which is not limited in this embodiment of the present application.

Optionally, a second timer can be used to define: per Sidelink process except for the broadcast transmission: the maximum duration until an SL retransmission is received.

Optionally, when the first communication device is configured with only one PSFCH resource, the first communication device may start a first timer at a time corresponding to the PSFCH, and may start a second timer after the first timer times out.

Optionally, when the first timer is started at least once (for example, K times, where K is a positive integer less than N), the first communication device may also start the second timer after the first timer is started at least once out of the K times and times out.

In an embodiment of the present application, the first electronic device can clearly know under what circumstances the sl-drx-HARQ-RTT-Timer and the sl-drx-RetransmissionTimer should be started, so as to correctly send and receive data or signaling.

In an embodiment of the present application, by determining to start the sl-drx-HARQ-RTT-Timer at the time corresponding to the PSFCH, and determining to start the sl-drx-RetransmissionTimer after the sl-drx-HARQ-RTT-Timer timer times out, the start time of the DRX-related timers in the SL DRX is clarified, thereby improving the reliability of data transmission and reception or signaling transmission and reception of the terminal.

Optionally, the first communication device is configured with at least N PSFCH resources, and the first communication device starts a first timer at a time corresponding to the PSFCH, including:

At a time corresponding to a first PSFCH, the first communication device starts a first timer, where the first PSFCH is any one or more of at least N PSFCHs, where N is greater than or equal to 2.

Optionally, when the first communication device is configured with multiple PSFCH resources, the first communication device may start a first timer at a time corresponding to a first PSFCH among the multiple PSFCHs, and the first PSFCH may be any one or more of at least N PSFCHs.

For example, when the first communication device is configured with multiple PSFCH resources, the first communication device can start the first timer at the time corresponding to the first or Lth PSFCH among the multiple PSFCHs, where L is a positive integer less than or equal to N.

Optionally, the first communication device starts a first timer at a time corresponding to the PSFCH, further comprising at least one of the following:

At a time corresponding to at least one second PSFCH, the first communications device restarts the first timer; wherein, in the time domain, the transmission resources of the second PSFCH are located after the transmission resources of the first PSFCH;

In a case where the running time of the second timer and the transmission resource of the third PSFCH at least partially overlap in the time domain, the first communications device is prohibited from restarting the first timer at the time corresponding to the third PSFCH;

In a case where the running time of the second timer at least partially overlaps with the transmission resources of the fourth PSFCH in the time domain, the first communications device restarts the first timer at a time corresponding to the fourth PSFCH, and stops the second timer whose running time at least partially overlaps with the transmission resources of the fourth PSFCH in the time domain;

The third PSFCH is any one of the second PSFCHs, and the fourth PSFCH is any one of the second PSFCHs.

Optionally, after starting the first timer at a time corresponding to the first PSFCH, the first timer may be restarted at a time corresponding to at least one second PSFCH.

Optionally, after starting the first timer at a time corresponding to the first or Lth PSFCH, the first timer may be restarted at a time corresponding to at least one subsequent second PSFCH.

For example, the sl-drx-HARQ-RTT-Timer may be started at the time corresponding to the first or Lth PSFCH, and may be restarted at the time corresponding to each subsequent PSFCH.

For example, the sl-drx-HARQ-RTT-Timer may be started at the time corresponding to the first or Lth PSFCH, and may be restarted at the time corresponding to any one or more subsequent PSFCHs.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the moment corresponding to the first or Lth PSFCH, and at the moment corresponding to each subsequent PSFCH, it is determined whether to restart the sl-drx-HARQ-RTT-Timer; the judgment principle is: if there is a next PSFCH resource during the operation of the sl-drx-RetransmissionTimer that is triggered to start after the sl-drx-HARQ-RTT-Timer started at the moment corresponding to the previous PSFCH times out, the sl-drx-HARQ-RTT-Timer will not be restarted; otherwise, the sl-drx-HARQ-RTT-Timer can be restarted.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the moment corresponding to the first or Lth PSFCH, and at the moment corresponding to at least one next PSFCH, it can be determined whether to restart the sl-drx-HARQ-RTT-Timer; the judgment principle is: if there is a next PSFCH resource during the operation of the sl-drx-RetransmissionTimer that is triggered to start after the sl-drx-HARQ-RTT-Timer started at the moment corresponding to the previous PSFCH times out, the sl-drx-HARQ-RTT-Timer will not be restarted; otherwise, the sl-drx-HARQ-RTT-Timer can be restarted.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to at least one next PSFCH; the exception is: if there is a next PSFCH resource during the operation of the sl-drx-RetransmissionTimer, the sl-drx-HARQ-RTT-Timer will not be restarted.

Optionally, Figure 5 is one of the schematic diagrams of the timer operation method provided in an embodiment of the present application. As shown in Figure 5, the initial transmission may be the resource of the first or Lth PSFCH or the transmission position of the first or Lth PSFCH, and the feedback resource may be a PSFCH resource; the sl-drx-HARQ-RTT-Timer (rtt start) may be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer (rtt start) may be restarted at each subsequent time corresponding to the PSFCH; the exception is: if there is the next PSFCH resource during the operation of the sl-drx-RetransmissionTimer (corresponding to the retx Timer in Figure 5), the sl-drx-HARQ-RTT-Timer will not be restarted.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the moment corresponding to the first or Lth PSFCH, and at the moment corresponding to each subsequent PSFCH, it is determined whether to restart the sl-drx-HARQ-RTT-Timer; the judgment principle is: if there is a next PSFCH resource during the operation of the sl-drx-RetransmissionTimer that is triggered to start after the sl-drx-HARQ-RTT-Timer started at the moment corresponding to the previous PSFCH times out, then the sl-drx-HARQ-RTT-Timer is restarted and the running sl-drx-HARQ-RTT-Timer is stopped.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the moment corresponding to the first or Lth PSFCH, and at the moment corresponding to at least one next PSFCH, it can be determined whether to restart the sl-drx-HARQ-RTT-Timer; the judgment principle is: if there is a next PSFCH resource during the operation of the sl-drx-RetransmissionTimer that is triggered to start after the sl-drx-HARQ-RTT-Timer started at the moment corresponding to the previous PSFCH times out, then the sl-drx-HARQ-RTT-Timer is restarted and the running sl-drx-HARQ-RTT-Timer is stopped.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to at least one next PSFCH; the exception is: if there is a next PSFCH resource during the operation of the sl-drx-RetransmissionTimer, the sl-drx-HARQ-RTT-Timer is restarted and the running sl-drx-HARQ-RTT-Timer is stopped.

Optionally, Figure 6 is a second schematic diagram of the timer operation method provided in an embodiment of the present application. As shown in Figure 6, the initial transmission may be the resource of the first or Lth PSFCH or the transmission position of the first or Lth PSFCH, and the feedback resource may be a PSFCH resource; the sl-drx-HARQ-RTT-Timer (rtt start) may be started at the moment corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer (rtt start) may be restarted at each subsequent moment corresponding to the PSFCH; the exception is: if there is a next PSFCH resource during the operation of the sl-drx-RetransmissionTimer, the sl-drx-HARQ-RTT-Timer is restarted and the running sl-drx-HARQ-RTT-Timer (corresponding to the retxTimer in Figure 6) is stopped.

Optionally, after the first timer times out, the first communications device starts a second timer, including at least one of the following:

After the last time the first timer is started times out, the first communication device starts a second timer;

After any one of the first timers times out, the first communication device starts a second timer;

After any multiple times of starting the first timer and it times out, the first communication device starts a second timer;

After each time the first timer times out, the first communications device starts a second timer.

Optionally, the second timer may be started after a certain, any, or every start of the first timer times out.

Optionally, Figure 7 is a third schematic diagram of the timer operation method provided in an embodiment of the present application. As shown in Figure 7, the initial transmission may be the resource of the first or Lth PSFCH or the transmission position of the first or Lth PSFCH, and the feedback resource may be a PSFCH resource; the sl-drx-HARQ-RTT-Timer (rtt start) may be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer (rtt start) may be restarted at the time corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer (rtt start) may be started only after the last sl-drx-HARQ-RTT-Timer times out (corresponding to the retx Timer in Figure 7). Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer can be started after any sl-drx-HARQ-RTT-Timer times out.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer can be started after any multiple sl-drx-HARQ-RTT-Timers expire.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer can be started after each sl-drx-HARQ-RTT-Timer times out.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to at least one next PSFCH, and the sl-drx-HARQ-RTT-Timer can be started only after the last sl-drx-HARQ-RTT-Timer times out.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to at least one next PSFCH, and the sl-drx-HARQ-RTT-Timer can be started after any sl-drx-HARQ-RTT-Timer times out.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to at least one next PSFCH, and the sl-drx-HARQ-RTT-Timer can be started after any multiple sl-drx-HARQ-RTT-Timers expire.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to at least one next PSFCH, and the sl-drx-HARQ-RTT-Timer can be started after each sl-drx-HARQ-RTT-Timer times out.

In one embodiment, when multiple PSFCHs are configured, the sl-drx-HARQ-RTT-Timer is started after each PSFCH resource or after each PSFCH transmission, but the sl-drx-Retransmission Timer may be started only after the last PSFCH resource.

In one embodiment, when multiple PSFCH is configured, sl-drx-HARQ-RTT-Timer is started after each PSFCH resource or after each PSFCH transmission, and sl-drx-RetransmissionTimer is started after any sl-drx-HARQ-RTT-Timer times out. The exception is that if sl-drx-RetransmissionTimer is running, sl-drx-HARQ-RTT-Timer is not started after the PSFCH resource or transmission during the running period.

In one embodiment, when multiple PSFCHs are configured, sl-drx-HARQ-RTT-Timer is started after each PSFCH resource or each PSFCH transmission, and sl-drx-RetransmissionTimer is started after any sl-drx-HARQ-RTT-Timer times out. Further, if sl-drx-RetransmissionTimer is running and the next PSFCH resource or transmission arrives, sl-drx-RetransmissionTimer is stopped and sl-drx-HARQ-RTT-Timer is started.

In one embodiment, when multiple PSFCHs are configured, the first electronic device is allowed to start sl-drx-HARQ-RTT-Timer after each PSFCH resource or transmission, and start sl-drx-RetransmissionTimer after any sl-drx-HARQ-RTT-Timer times out. If the first electronic device runs sl-drx-HARQ-RTT-Timer and sl-drx-RetransmissionTimer at the same time, the behavior of the first electronic device can be specified as monitoring or not monitoring PSCCH and/or PSSCH.

Optionally, the method further comprises:

After the first timer is started for the Xth time and times out, the first communication device starts a second timer;

After the first timer is started for the Yth time and times out, the first communication device does not start the second timer and does not monitor Listen to PSCCH and/or PSSCH;

X and Y are positive integers less than N, X and Y are not equal, and N is the number of PSFCHs configured for the first communication device.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the moment corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the moment corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer is started after any one or more sl-drx-HARQ-RTT-Timers time out (that is, there may be some sl-drx-HARQ-RTT-Timer timeouts that do not trigger the start of the sl-drx-Retransmission Timer), wherein the timeout of one or more sl-drx-HARQ-RTT-Timers does not trigger the start of the sl-drx-Retransmission Timer, and the PSCCH and/or PSSCH is not monitored after the one or more sl-drx-HARQ-RTT-Timers time out.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to at least one next PSFCH, and the sl-drx-HARQ-RTT-Timer is started after any one or more sl-drx-HARQ-RTT-Timers time out (that is, there may be some sl-drx-HARQ-RTT-Timer timeouts that do not trigger the start of the sl-drx-Retransmission Timer), wherein the timeout of one or more sl-drx-HARQ-RTT-Timers does not trigger the start of the sl-drx-Retransmission Timer, and the PSCCH and/or PSSCH is not monitored after the one or more sl-drx-HARQ-RTT-Timers time out.

Optionally, not monitoring PSCCH and/or PSSCH means: not monitoring PSCCH, or not monitoring PSSCH, or not monitoring PSCCH and PSSCH.

It should be noted that, in the embodiment of the present application, the first communication device performs a non-monitoring operation, which can achieve a technical effect of saving power for the device.

In one embodiment, five PSFCH resources (PSFCH1, PSFCH2, PSFCH3, PSFCH4, and PSFCH5) are configured. At the time corresponding to the first PSFCH1, the sl-drx-HARQ-RTT-Timer can be started, and at the times corresponding to the next PSFCH2, PSFCH3, PSFCH4, and PSFCH5, the sl-drx-HARQ-RTT-Timer can be restarted. The sl-drx-RetransmissionTimer can be started after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH4 times out. The sl-drx-RetransmissionTimer may be started after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to P SFCH5 times out, the PSCCH and/or PSSCH may not be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH1 times out, the PSCCH and/or PSSCH may not be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH2 times out, and the PSCCH and/or PSSCH may not be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH3 times out.

In one embodiment, four PSFCH resources (PSFCH1, PSFCH2, PSFCH3, and PSFCH4) are configured, and the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first PSFCH1, and the sl-drx-HARQ-RTT-Timer can be restarted at the times corresponding to the next PSFCH3 and PSFCH4. The sl-drx-RetransmissionTimer can be started after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH4 times out, and the PSCCH and/or PSSCH will not be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH1 times out, and the PSCCH and/or PSSCH will not be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH3 times out.

Optionally, the method further comprises:

The first communication device starts the SL retransmission timer after the first timer is started for the Zth time and times out;

And the first communication device does not start the SL retransmission timer and monitors the PSCCH and/or PSSCH after the first timer is started for the Wth time and times out;

Z and W are positive integers less than N, Z and W are not equal, and N is the number of PSFCHs configured for the first communication device.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the moment corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the moment corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer is started after any one or more sl-drx-HARQ-RTT-Timers time out (that is, there may be some sl-drx-HARQ-RTT-Timer timeouts that do not trigger the start of the sl-drx-Retransmission Timer), wherein the timeout of one or more sl-drx-HARQ-RTT-Timers does not trigger the start of the sl-drx-Retransmission Timer, and the PSCCH and/or PSSCH are monitored after the one or more sl-drx-HARQ-RTT-Timers time out.

Optionally, monitoring PSCCH and/or PSSCH means: monitoring PSCCH, or monitoring PSSCH, or monitoring PSCCH and PSSCH.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to at least one next PSFCH, and the sl-drx-HARQ-RTT-Timer is started after any one or more sl-drx-HARQ-RTT-Timers time out (that is, there may be some sl-drx-HARQ-RTT-Timer timeouts that do not trigger the start of the sl-drx-RetransmissionTimer), wherein the timeout of one or more sl-drx-HARQ-RTT-Timers does not trigger the start of the sl-drx-Retransmission Timer, and after the one or more sl-drx-HARQ-RTT-Timers time out Monitor PSCCH and/or PSSCH.

It should be noted that in the embodiment of the present application, the first communication device performs a monitoring operation to avoid packet loss during the communication process, thereby ensuring the communication quality and stability.

In one embodiment, five PSFCH resources (PSFCH1, PSFCH2, PSFCH3, PSFCH4, and PSFCH5) are configured. The sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first PSFCH1, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to the next PSFCH2, PSFCH3, PSFCH4, and PSFCH5, respectively. The sl-drx-HARQ-RTT-Timer can be started after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH4 times out. r, the sl-drx-RetransmissionTimer can be started after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH5 times out, the PSCCH and/or PSSCH can be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH1 times out, the PSCCH and/or PSSCH can be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH2 times out, and the PSCCH and/or PSSCH can be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH3 times out.

In one embodiment, four PSFCH resources (PSFCH1, PSFCH2, PSFCH3, and PSFCH4) are configured, and the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first PSFCH1, and the sl-drx-HARQ-RTT-Timer can be restarted at the times corresponding to the next PSFCH3 and PSFCH4. The sl-drx-RetransmissionTimer can be started after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH4 times out, and the PSCCH and/or PSSCH can be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH1 times out, and the PSCCH and/or PSSCH can be monitored after the sl-drx-HARQ-RTT-Timer restarted at the time corresponding to PSFCH3 times out.

Optionally, when the first communication device starts a second timer after the last start of the first timer times out, the method further includes:

The first communication device determines not to monitor the PSCCH and/or PSSCH based on a third event;

The third event includes the first timer being started for the Qth time and timing out, where Q is a positive integer less than N.

Optionally, at the time corresponding to the first or Lth PSFCH, the sl-drx-HARQ-RTT-Timer is started, and at the time corresponding to each subsequent PSFCH, the sl-drx-HARQ-RTT-Timer is restarted. The sl-drx-RetransmissionTimer may be started only after the last sl-drx-HARQ-RTT-Timer times out. If the previous sl-drx-HARQ-RTT-Timer times out, the first communication device does not monitor the PSCCH and/or PSSCH.

Optionally, at the time corresponding to the first or Lth PSFCH, the sl-drx-HARQ-RTT-Timer is started, and at the time corresponding to at least one next PSFCH, the sl-drx-HARQ-RTT-Timer is restarted. The sl-drx-RetransmissionTimer may be started only after the last sl-drx-HARQ-RTT-Timer times out. If the previous sl-drx-HARQ-RTT-Timer times out, the first communication device does not monitor the PSCCH and/or PSSCH.

In each embodiment of the present application, it is clarified in which scenarios the first communication device does not monitor the PSCCH and/or PSSCH, so as to reduce the energy consumption of the first communication device.

The first communication device determines to monitor the PSCCH and/or PSSCH based on a fourth event;

The fourth event includes the R-th time the first timer is started and times out, the R-th time the first timer is started is not the last time the first timer is started, and R is a positive integer less than N.

Optionally, at the time corresponding to the first or Lth PSFCH, the sl-drx-HARQ-RTT-Timer is started, and at the time corresponding to each subsequent PSFCH, the sl-drx-HARQ-RTT-Timer is restarted. The sl-drx-RetransmissionTimer may be started only after the last sl-drx-HARQ-RTT-Timer times out. If the previous sl-drx-HARQ-RTT-Timer times out, the first communication device monitors the PSCCH and/or PSSCH.

Optionally, at the time corresponding to the first or Lth PSFCH, the sl-drx-HARQ-RTT-Timer is started, and at the time corresponding to at least one next PSFCH, the sl-drx-HARQ-RTT-Timer is restarted. The sl-drx-RetransmissionTimer may be started only after the last sl-drx-HARQ-RTT-Timer times out. If the previous sl-drx-HARQ-RTT-Timer times out, the first communication device monitors the PSCCH and/or PSSCH.

In each embodiment of the present application, it is clarified in which scenarios the first communication device monitors PSCCH and/or PSSCH, which can avoid packet loss and improve communication quality.

Optionally, the method further comprises:

The first communication device determines to monitor the PSCCH and/or PSSCH based on the fifth event;

The fifth event includes the first timer and the second timer running simultaneously.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer can be started after any sl-drx-HARQ-RTT-Timer times out; if the first communication device is running the sl-drx-HARQ-RTT-Timer and the sl-drx-RetransmissionTimer at the same time, the behavior of the first communication device is not to monitor the PSCCH and/or PSSCH.

Optionally, sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and restarted at the time corresponding to each subsequent PSFCH. sl-drx-HARQ-RTT-Timer, starts sl-drx-RetransmissionTimer after each sl-drx-HARQ-RTT-Timer times out; if the first communication device is running sl-drx-HARQ-RTT-Timer and sl-drx-RetransmissionTimer at the same time, the behavior of the first communication device is not to monitor PSCCH and/or PSSCH.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer can be started after any multiple sl-drx-HARQ-RTT-Timers expire; if the first communication device is running the sl-drx-HARQ-RTT-Timer and the sl-drx-RetransmissionTimer at the same time, the behavior of the first communication device is not to monitor the PSCCH and/or PSSCH.

Optionally, the method further comprises:

The first communication device determines not to monitor the PSCCH and/or PSSCH based on a sixth event;

The sixth event includes the first timer and the second timer running simultaneously.

Optionally, Figure 8 is a fourth schematic diagram of the timer operation method provided in an embodiment of the present application. As shown in Figure 8, the initial transmission may be the resource of the first or Lth PSFCH or the transmission position of the first or Lth PSFCH, and the feedback resource may be a PSFCH resource; the sl-drx-HARQ-RTT-Timer (rtt start) may be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer (rtt start) may be restarted at the time corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer (rtt start) may be started after any sl-drx-HARQ-RTT-Timer times out (corresponding to the retx Timer in Figure 8); if the first communication device is simultaneously running the sl-drx-HARQ-RTT-Timer and the sl-drx-RetransmissionTimer (corresponding to the retx Timer in Figure 8), the behavior of the first communication device is not to monitor the PSCCH and/or PSSCH.

Optionally, the sl-drx-HARQ-RTT-Timer can be started at the time corresponding to the first or Lth PSFCH, and the sl-drx-HARQ-RTT-Timer can be restarted at the time corresponding to each subsequent PSFCH, and the sl-drx-HARQ-RTT-Timer can be started after each sl-drx-HARQ-RTT-Timer times out; if the first communication device is running the sl-drx-HARQ-RTT-Timer and the sl-drx-RetransmissionTimer at the same time, the behavior of the first communication device is not to monitor the PSCCH and/or PSSCH.

In an embodiment of the present application, the first electronic device can clearly know under what circumstances the sl-drx-HARQ-RTT-Timer and sl-drx-RetransmissionTimer should be started, and can clearly know when the PSCCH and/or PSSCH should be monitored and when the PSCCH and/or PSSCH should not be monitored, so as to correctly send and receive data or signaling.

Optionally, the time for starting the first timer includes any one of the following:

The first time unit after the resource of the PSFCH;

The first time unit after the PSFCH transmission.

Optionally, a time unit may refer to a time slot, or a symbol, or a sub-time slot, or any fixed time length, which is not limited in the embodiments of the present application.

Optionally, the moment of starting the first timer may be the moment corresponding to the PSFCH;

Optionally, the time corresponding to the PSFCH may be the first time unit after the resource of the PSFCH;

Optionally, the time corresponding to the PSFCH may be the first time unit after the PSFCH transmission;

Optionally, PSFCH transmission may refer to the first communication device performing an action of "sending PSFCH", such as attempting to send PSFCH, and the PSFCH may or may not be sent successfully.

Optionally, PSFCH transmission may refer to the first communication device successfully sending PSFCH.

Optionally, the moment corresponding to the first or L-th PSFCH in each embodiment of the present application may include: after the first or L-th PSFCH resource, or after the first or L-th PSFCH transmission carrying HARQ feedback.

Optionally, in the case of the PSFCH transmission, the moment of starting the first timer includes: the first time unit after the PSFCH transmission;

and / or

In the case that the PSFCH is not transmitted, the time for starting the first timer includes: the first time unit after the resource of the PSFCH.

Among them, in the case of the PSFCH transmission, the above can be understood as the HARQ A/N being successfully transmitted. In this case, the first time unit after the PSFCH transmission can be understood as the first time slot after the PSFCH transmission.

Among them, the aforementioned case where the PSFCH is not transmitted can be understood as a listen-before-talk (LBT) failure occurring in all PSFCH occasions. In this case, the first time unit after the PSFCH resource can be understood as the first time slot after the last PSFCH occasion.

Optionally, in the case where the PSFCH is not transmitted, the time corresponding to the PSFCH may be the resource time of the PSFCH. The first time unit after the source;

Optionally, in the case of PSFCH transmission, the time corresponding to the PSFCH may be the first time unit after the PSFCH transmission;

Optionally, for any PSFCH, if the PSFCH is sent successfully, a first timer is started in the first time unit after the PSFCH is sent successfully.

Optionally, for any PSFCH, if the PSFCH is not sent successfully or is not sent, a first timer is started in the first time unit after the resource of the PSFCH.

In one embodiment, the sl-drx-HARQ-RTT-Timer may be started at the first time unit (such as symbol or slot) after the first or Lth PSFCH transmission carrying HARQ feedback;

In one embodiment, if the HARQ feedback cannot be sent, the sl-drx-HARQ-RTT-Timer is started at the first time unit (such as symbol or slot) after the PSFCH resource corresponding to the HARQ feedback.

Optionally, when HARQ feedback can be transmitted, the start time of sl-drx-HARQ-RTT-Timer can be "after the first or Lth PSFCH transmission carrying HARQ feedback"; when HARQ feedback is not transmitted or HARQ feedback transmission fails, the start time of sl-drx-HARQ-RTT-Timer can be "after the first or Nth PSFCH resource".

Optionally, PSFCH non-transmission may be determined based on UL/SL prioritization.

Optionally, it can be determined that PSFCH was not transmitted based on LBT failure.

Optionally, in the case where HARQ ACK is transmitted through the PSFCH, the moment of starting the first timer includes: the first time unit after the PSFCH is transmitted;

and / or

In the case of transmitting HARQ NACK through the PSFCH, the moment of starting the first timer includes: the first time unit after the PSFCH transmission.

Optionally, it may be determined that the first timer needs to be started only when the PSFCH transmits HARQ ACK; and the first timer may be started in the first time unit after the PSFCH transmitting the HARQ ACK is sent.

Optionally, it may be determined that the first timer needs to be started only when the PSFCH transmits HARQ NACK; and the first timer may be started in the first time unit after the PSFCH transmitting the HARQ ACK is sent.

Optionally, it can be determined that the first timer needs to be started when the PSFCH transmits HARQ ACK or transmits HARQ NACK; the first timer can be started in the first time unit after the PSFCH for transmitting HARQ ACK is sent, and the first timer can be started in the first time unit after the PSFCH for transmitting HARQ NACK is sent.

In one embodiment, the feedback determination mode determined by the first communication device is a negative-only acknowledgement mode, and the sl-drx-HARQ-RTT-Timer may be started at the first time unit (such as a symbol or slot) after the first or Lth PSFCH transmission carrying HARQ negative feedback;

In one embodiment, the feedback determination mode determined by the first communication device is a negative-only acknowledgement mode. If the feedback to be transmitted is a positive acknowledgement, the sl-drx-HARQ-RTT-Timer is started at the first time unit (such as a symbol or slot) after the aforementioned PSFCH resource.

In one embodiment, after the first or L-th PSFCH transmission, or after the first or L-th PSFCH resource, the sl-drx-HARQ-RTT-Timer is started. If ACK is successfully sent subsequently, the sl-drx-HARQ-RTT-Timer is stopped. If NACK is continuously sent, the sl-drx-HARQ-RTT-Timer is stopped until the last available PSFCH resource, and the sl-drx-RetransmissionTimer is started.

Optionally, the first PSFCH may be the first or Lth PSFCH.

Optionally, when the first PSFCH is not transmitted, the time corresponding to the first PSFCH may be the first time unit after the resource of the first PSFCH;

Optionally, in the case of a first PSFCH transmission, the time corresponding to the first PSFCH may be the first time unit after the first PSFCH transmission;

Optionally, for any first PSFCH, if the first PSFCH is sent successfully, the first timer is started in the first time unit after the first PSFCH is sent successfully.

Optionally, for any first PSFCH, if the first PSFCH is not sent successfully or is not sent, a first timer is started in a first time unit after the resource of the first PSFCH.

In one embodiment, the sl-drx-HARQ-RTT-Timer may be started at the first time unit (such as symbol or slot) after any first PSFCH transmission carrying HARQ feedback;

In one embodiment, if HARQ feedback cannot be sent, the sl-drx-HARQ-RTT-Timer is started at the first time unit (such as symbol or slot) after the first PSFCH resource corresponding to the HARQ feedback.

Optionally, the first PSFCH transmission may refer to the first communication device performing an action of "sending PSFCH", such as attempting to send the first PSFCH, and the first PSFCH may be sent successfully or may not be sent successfully.

Optionally, the first PSFCH transmission may refer to the first communication device successfully sending the first PSFCH.

Optionally, the moment of restarting the first timer includes any one of the following:

The first time unit after the resource of the second PSFCH;

The first time unit after the second PSFCH transmission.

Optionally, the time corresponding to the second PSFCH may be the first time unit after the resource of the second PSFCH;

Optionally, the time corresponding to the second PSFCH may be the first time unit after the second PSFCH is transmitted;

Optionally, the moment of restarting the first timer may be the moment corresponding to the second PSFCH;

Optionally, the second PSFCH transmission may refer to the first communication device performing an action of "sending PSFCH", such as attempting to send a second PSFCH, and the second PSFCH may or may not be sent successfully.

Optionally, the second PSFCH transmission may refer to the first communication device successfully sending the second PSFCH.

Optionally, in the case where HARQ ACK is transmitted through the second PSFCH, the moment of restarting the first timer includes: the first time unit after the second PSFCH transmission;

and / or

In the case of transmitting HARQ NACK via the second PSFCH, the moment of restarting the first timer includes: the first time unit after the second PSFCH transmission.

Optionally, when the second PSFCH is not transmitted, the time corresponding to the second PSFCH may be the first time unit after the resource of the second PSFCH;

Optionally, in the case of a second PSFCH transmission, the time corresponding to the second PSFCH may be the first time unit after the second PSFCH transmission;

Optionally, for any second PSFCH, if the second PSFCH is sent successfully, the first timer is started in the first time unit after the second PSFCH is sent successfully.

Optionally, for any second PSFCH, if the second PSFCH is not sent successfully or is not sent, the first timer is started in the first time unit after the resource of the second PSFCH.

In one embodiment, the sl-drx-HARQ-RTT-Timer may be started at the first time unit (such as symbol or slot) after any second PSFCH transmission carrying HARQ feedback;

In one embodiment, if the HARQ feedback cannot be sent, the sl-drx-HARQ-RTT-Timer is started at the first time unit (such as symbol or slot) after the second PSFCH resource corresponding to the HARQ feedback.

Optionally, at a time corresponding to the PSFCH, the first communication device starts a first timer, including:

When determining that the first condition is met, the first communication device starts a first timer at a time corresponding to the PSFCH;

The first condition includes at least one of the following:

HARQ feedback enable;

HARQ feedback disabled;

cast type is unicast;

cast type is multicast and the HARQ feedback mode includes positive feedback confirmation mode and negative feedback confirmation mode;

cast type is multicast and HARQ feedback mode includes negative feedback confirmation mode;

One or more retransmission opportunities are not scheduled in the SCI.

Optionally, the embodiments of the present application may be performed when the following conditions are met at the same time, for example, at the time corresponding to the PSFCH, the first timer is started, and after the first timer times out, the second timer is started:

HARQ feedback is enabled;

cast type is unicast.

HARQ feedback is enabled;

cast type is multicast and the HARQ feedback mode includes positive feedback confirmation mode and negative feedback confirmation mode.

HARQ feedback is enabled;

cast type is multicast and the HARQ feedback mode includes negative feedback confirmation mode.

HARQ feedback is disabled;

The SCI does not schedule one or more retransmission opportunities.

Optionally, after the first communication device starts a first timer and before the first timer times out, the method further includes:

If resources for PSFCH exist, attempt to retransmit PSFCH.

Optionally, sl-drx-HARQ-RTT-Timer can be started after the first PSFCH or Lth transmission or resource. If there are available PSFCH resources before timeout, try to retransmit PSFCH until sl-drx-HARQ-RTT-Timer times out, then stop retransmitting PSFCH and start sl-drx-RetransmissionTimer.

Optionally, after the first communication device starts the first timer, the method further includes:

After sending the hybrid automatic repeat request ACK, perform at least one of the following:

Stop running the first timer, or

In one embodiment, after the first or Lth PSFCH transmission, or after the first or Lth PSFCH resource, the sl-drx-HARQ-RTT-Timer is started, and if an ACK is successfully sent subsequently, the sl-drx-HARQ-RTT-Timer is stopped, and if NACK is continuously sent, the sl-drx-HARQ-RTT-Timer is stopped until the last available PSFCH resource, and the sl-drx-RetransmissionTimer is started.

In one embodiment, the timer operation method may include:

Step 1: The first electronic device monitors PSCCH and/or PSSCH within the DRX active time;

Step 2: The first electronic device receives the SCI, which indicates a sidelink transmission;

Step 3: When PSFCH resources are configured, if the following conditions are determined to be met at the same time:

HARQ feedback is enabled, and SCI indicates that the transmission is unicast;

Or make sure that the following conditions are met at the same time:

HARQ feedback is enabled, and the SCI indicates that the transmission is multicast and positive-negative acknowledgment mode is selected;

The sl-drx-HARQ-RTT-Timer can be started at the first symbol or slot after the first PSFCH transmission carrying HARQ feedback. If HARQ feedback cannot be sent, the sl-drx-HARQ-RTT-Timer is started at the first symbol or slot after the first PSFCH resource.

Step 4: Restart the sl-drx-HARQ-RTT-Timer at each subsequent PSFCH resource. If any sl-drx-HARQ-RTT-Timer times out, start the sl-drx-RetransmissionTimer. If the first electronic device is running the sl-drx-HARQ-RTT-Timer and the sl-drx-RetransmissionTimer at the same time, the behavior of the first electronic device is to monitor the PSCCH and/or PSSCH.

In one embodiment, the timer operation method may include:

Step 3: When PSFCH resources are configured, if the following conditions are met at the same time:

HARQ feedback is enabled, and the SCI indicates that the transmission is multicast and negative-only acknowledgment mode is selected;

The sl-drx-HARQ-RTT-Timer can be started at the first symbol or slot after the first PSFCH transmission carrying HARQ feedback. If HARQ feedback cannot be sent or the feedback to be transmitted is positive acknowledgement, the sl-drx-HARQ-RTT-Timer is started at the first symbol or slot after the first PSFCH resource.

In one embodiment, the timer operation method may include:

HARQ feedback is disabled, and the SCI does not schedule one or more retransmission opportunities;

Then start the sl-drx-HARQ-RTT-Timer at the first symbol or slot after the first PSFCH resource.

The timer operation method provided in the embodiment of the present application can be executed by a timer operation device. In the embodiment of the present application, the timer operation device provided in the embodiment of the present application is described by taking the timer operation method executed by the timer operation device as an example.

FIG. 9 is a schematic diagram of the structure of a timer operation device provided in an embodiment of the present application. As shown in FIG. 9 , the timer operation device 900 includes:

The first starting module 910 is used to start the first timer at the time corresponding to the physical secondary link feedback channel PSFCH;

The second starting module 920 is used to start a second timer after the first timer times out;

In an embodiment of the present application, by determining to start the sl-drx-HARQ-RTT-Timer at the time corresponding to the PSFCH, and determining to start the sl-drx-RetransmissionTimer after the sl-drx-HARQ-RTT-Timer timer times out, the start time of the DRX-related timer in the SL DRX is clarified, thereby improving the reliability of data transmission and reception or signaling transmission and reception of the terminal.

Optionally, the first communication device is configured with at least N PSFCH resources, and the first starting module is used to:

Optionally, the first startup module is further used for at least one of the following:

At a time corresponding to at least one second PSFCH, the first communications device restarts the first timer; wherein, in the time domain, the transmission resources of the second PSFCH are located after the transmission resources of the first PSFCH; when the running time of the second timer and the transmission resources of the third PSFCH at least partially overlap in the time domain, the first communications device is prohibited from restarting the first timer at the time corresponding to the third PSFCH;

Optionally, the second startup module is used for at least one of the following:

After any multiple times of starting the first timer and timeout, the first communication device starts a second timer;

Optionally, the device further comprises:

A third starting module, configured to start the second timer by the first communication device after the first timer is started for the Xth time and times out;

A fourth starting module, configured to, after the first timer is started for the Yth time and times out, cause the first communication device to not start the second timer and not monitor the PSCCH and/or PSSCH;

Optionally, the device further comprises:

A fifth starting module, configured to start the SL retransmission timer after the first timer is started for the Zth time and times out;

A first monitoring module, configured to, after the first timer is started for the Wth time and times out, not start the SL retransmission timer and monitor the PSCCH and/or PSSCH;

Optionally, the device further comprises:

A first determining module is used to determine not to monitor the PSCCH and/or PSSCH based on a third event when the first communication device starts the second timer after the last start of the first timer times out;

Optionally, the device further comprises:

A second determining module is used to determine to monitor the PSCCH and/or PSSCH based on a fourth event when the first communication device starts the second timer after the last start of the first timer times out;

Optionally, the device further comprises:

A third determining module, configured to determine to monitor the PSCCH and/or the PSSCH based on a fifth event;

Optionally, the device further comprises:

A fourth determining module, configured to determine not to monitor the PSCCH and/or PSSCH based on a sixth event;

The first time unit after the resource of the PSFCH;

The first time unit after the PSFCH transmission.

and / or

In the case where HARQ NACK is transmitted via the PSFCH, the time for starting the first timer includes Enclosed: the first time unit after the PSFCH transmission.

The first time unit after the resource of the second PSFCH;

The first time unit after the second PSFCH transmission.

and / or

Optionally, the first startup module is used to:

When it is determined that the first condition is met, starting a first timer at a time corresponding to the PSFCH;

The first condition includes at least one of the following:

HARQ feedback enable;

HARQ feedback disabled;

cast type is unicast;

cast type is multicast;

The HARQ feedback mode includes a positive feedback confirmation mode;

The HARQ feedback mode includes a negative feedback confirmation mode;

One or more retransmission opportunities are not scheduled in the SCI.

Optionally, the device further comprises:

The retransmission module is used to attempt to retransmit the PSFCH after the first communication device starts the first timer and before the first timer expires, if there are resources for the PSFCH.

Optionally, the device further comprises:

A sixth starting module is configured to, after starting the first timer and after sending a hybrid automatic repeat request confirmation ACK, perform at least one of the following:

Stop running the first timer, or

Start the second timer. In the embodiment of the present application, by determining to start the sl-drx-HARQ-RTT-Timer at the time corresponding to the PSFCH, and determining to start the sl-drx-RetransmissionTimer after the sl-drx-HARQ-RTT-Timer timer times out, the start time of the DRX-related timer in the SL DRX is clarified, thereby improving the reliability of data transmission or signaling transmission of the terminal.

The timer operation device in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be other devices other than a terminal. Exemplarily, the terminal can include but is not limited to the types of terminals 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

The timer operation device provided in the embodiment of the present application can implement the various processes implemented by the method embodiments of Figures 4 to 8 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

Optionally, FIG10 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in FIG10, an embodiment of the present application further provides a communication device 1000, including a processor 1001 and a memory 1002. The memory 1002 stores a program or instruction that can be run on the processor 1001. For example, when the communication device 1000 is a first communication device, the program or instruction is executed by the processor 1001 to implement the various steps of the above-mentioned timer operation method embodiment, and can achieve the same technical effect. When the communication device 1000 is a network side device, the program or instruction is executed by the processor 1001 to implement the various steps of the above-mentioned timer operation method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

The embodiment of the present application further provides a first communication device, including a processor and a communication interface, wherein the processor is configured to:

The first communication device embodiment corresponds to the first communication device side method embodiment described above, and each implementation process and implementation method of the above method embodiment can be applied to the first communication device embodiment and can achieve the same technical effect. Specifically, Figure 11 is a schematic diagram of the hardware structure of a first communication device implementing an embodiment of the present application.

The first communication device 1100 includes but is not limited to: a radio frequency unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user input unit 1107, an interface unit 1108, a memory 1109 and at least some of the components of a processor 1110.

Those skilled in the art will appreciate that the first communication device 1100 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1110 through a power management system, so that the power management system can manage charging, discharging, and power consumption. The terminal may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components, which will not be described in detail here.

It should be understood that in the embodiment of the present application, the input unit 1104 may include a graphics processing unit (GPU) 11041 and a microphone 11042, and the graphics processor 11041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1107 includes a touch panel 11071 and at least one of other input devices 11072. The touch panel 11071 is also called a touch screen. The touch panel 11071 may include two parts: a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1101 can transmit the data to the processor 1110 for processing; in addition, the RF unit 1101 can send uplink data to the network side device. Generally, the RF unit 1101 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

The memory 1109 can be used to store software programs or instructions and various data. The memory 1109 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1109 may include a volatile memory or a non-volatile memory, or the memory 1109 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1109 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

The processor 1110 may include one or more processing units; optionally, the processor 1110 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1110.

The processor 1110 is used for:

At a time corresponding to the physical secondary link feedback channel PSFCH, starting a first timer;

After the first timer times out, starting a second timer;

Optionally, the first communication device is configured with at least N PSFCH resources, and the processor 1110 is configured to:

Optionally, the processor 1110 is configured to perform at least one of the following:

After the last start of the first timer times out, start the second timer;

After any start of the first timer times out, start the second timer;

After the first timer is started any number of times and times out, the second timer is started;

After each time the first timer times out, the second timer is started.

Optionally, the processor 1110 is configured to:

After the first timer times out for the Xth time, the second timer is started;

After the first timer is started for the Yth time and times out, the second timer is not started, and the PSCCH and/or PSSCH is not monitored;

Optionally, the processor 1110 is configured to:

After the first timer is started for the Zth time and times out, the SL retransmission timer is started;

After the Wth time the first timer is started and times out, the SL retransmission timer is not started, and the PSCCH and/or PSSCH are monitored;

Optionally, the processor 1110 is configured to:

Determining not to monitor the PSCCH and/or PSSCH based on a third event;

Optionally, the processor 1110 is configured to:

Determine to monitor the PSCCH and/or PSSCH based on a fourth event;

Optionally, the processor 1110 is configured to:

Determine to monitor the PSCCH and/or PSSCH based on a fifth event;

Optionally, the processor 1110 is configured to:

Determining not to monitor the PSCCH and/or PSSCH based on a sixth event;

The first time unit after the resource of the PSFCH;

The first time unit after the PSFCH transmission.

and / or

The first time unit after the resource of the second PSFCH;

The first time unit after the second PSFCH transmission.

and / or

Optionally, the processor 1110 is configured to:

The first condition includes at least one of the following:

HARQ feedback enable;

HARQ feedback disabled;

cast type is unicast;

cast type is multicast;

The HARQ feedback mode includes a positive feedback confirmation mode;

The HARQ feedback mode includes a negative feedback confirmation mode;

One or more retransmission opportunities are not scheduled in the SCI.

Optionally, after the first communication device starts a first timer and before the first timer times out, The processor 1110 is used to:

If resources for PSFCH exist, attempt to retransmit PSFCH.

Optionally, the processor 1110 is configured to: after the first communications device starts the first timer and after sending a hybrid automatic repeat request confirmation ACK, perform at least one of the following:

Stop running the first timer, or

An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned timer operation method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

The processor is the processor in the terminal described in the above embodiment. The readable storage medium may be non-volatile or non-transient. The readable storage medium may include a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned timer operation method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

The embodiment of the present application further provides a computer program/program product, which is stored in a storage medium. The computer program/program product is executed by at least one processor to implement the various processes of the above-mentioned timer operation method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

An embodiment of the present application also provides a timer operation system, including: a first communication device, wherein the first communication device can be used to execute the steps of the timer operation method as described above.

It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including a ..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the relevant technology, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, computer, server, air conditioner, or network equipment, etc.) to execute the methods described in each embodiment of the present application.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

A timer operation method, comprising:

At a time corresponding to the physical secondary link feedback channel PSFCH, the first communication device starts a first timer;

After the first timer times out, the first communication device starts a second timer;

The first timer includes a side-link discontinuous reception hybrid automatic repeat feedback timer sl-drx-HARQ-RTT-Timer, and the second timer includes a side-link discontinuous reception retransmission timer sl-drx-RetransmissionTimer.
The timer operation method according to claim 1, wherein the first communication device is configured with at least N PSFCH resources, and the first communication device starts the first timer at the time corresponding to the PSFCH, comprising:

At a time corresponding to a first PSFCH, the first communication device starts a first timer, where the first PSFCH is any one or more of at least N PSFCHs, where N is greater than or equal to 2.
The timer operation method according to claim 2, wherein the first communications device starts the first timer at a time corresponding to the PSFCH, further comprising at least one of the following:

At a time corresponding to at least one second PSFCH, the first communications device restarts the first timer; wherein, in the time domain, the transmission resources of the second PSFCH are located after the transmission resources of the first PSFCH; when the running time of the second timer and the transmission resources of the third PSFCH at least partially overlap in the time domain, the first communications device is prohibited from restarting the first timer at the time corresponding to the third PSFCH;

In a case where the running time of the second timer at least partially overlaps with the transmission resources of the fourth PSFCH in the time domain, the first communications device restarts the first timer at a time corresponding to the fourth PSFCH, and stops the second timer whose running time at least partially overlaps with the transmission resources of the fourth PSFCH in the time domain;

The third PSFCH is any one of the second PSFCHs, and the fourth PSFCH is any one of the second PSFCHs.
The timer operation method according to any one of claims 1 to 3, wherein after the first timer times out, the first communication device starts a second timer, comprising at least one of the following:

After the last time the first timer is started times out, the first communication device starts a second timer;

After any one of the first timers times out, the first communication device starts a second timer;

After any multiple times of starting the first timer and timeout, the first communication device starts a second timer;

After each time the first timer times out, the first communications device starts a second timer.
The timer operation method according to any one of claims 1 to 4, wherein the method further comprises:

After the first timer is started for the Xth time and times out, the first communication device starts a second timer;

After the first timer is started for the Yth time and times out, the first communication device does not start the second timer and does not monitor the PSCCH and/or PSSCH;

X and Y are positive integers less than N, X and Y are not equal, and N is the number of PSFCHs configured for the first communication device.
The timer operation method according to any one of claims 1 to 4, wherein the method further comprises:

The first communication device starts the SL retransmission timer after the first timer is started for the Zth time and times out;

And the first communication device does not start the SL retransmission timer and monitors the PSCCH and/or PSSCH after the first timer is started for the Wth time and times out;

Z and W are positive integers less than N, Z and W are not equal, and N is the number of PSFCHs configured for the first communication device.
The timer operation method according to claim 4, wherein, when the first communication device starts the second timer after the last start of the first timer times out, the method further comprises:

The first communication device determines not to monitor the PSCCH and/or PSSCH based on a third event;

The third event includes the first timer being started for the Qth time and timing out, where Q is a positive integer less than N.
The timer operation method according to claim 4, wherein, when the first communication device starts the second timer after the last start of the first timer times out, the method further comprises:

The first communication device determines to monitor the PSCCH and/or PSSCH based on a fourth event;

The fourth event includes the R-th time the first timer is started and times out, the R-th time the first timer is started is not the last time the first timer is started, and R is a positive integer less than N.
The timer operation method according to claim 4, wherein the method further comprises:

The first communication device determines to monitor the PSCCH and/or PSSCH based on the fifth event;

The fifth event includes the first timer and the second timer running simultaneously.
The timer operation method according to claim 4, wherein the method further comprises:

The first communication device determines not to monitor the PSCCH and/or PSSCH based on a sixth event;

The sixth event includes the first timer and the second timer running simultaneously.
The timer operation method according to any one of claims 1 to 10, wherein the moment of starting the first timer includes any one of the following:

The first time unit after the resource of the PSFCH;

The first time unit after the PSFCH transmission.
The timer operation method according to any one of claims 1 to 11, wherein, in the case of the PSFCH transmission, the moment of starting the first timer includes: the first time unit after the PSFCH transmission;

and / or

In the case that the PSFCH is not transmitted, the time for starting the first timer includes: the first time unit after the resource of the PSFCH.
The timer operation method according to any one of claims 1 to 12, wherein, in the case where HARQ ACK is transmitted through the PSFCH, the time of starting the first timer includes: the first time unit after the PSFCH transmission;

and / or

In the case of transmitting HARQ NACK through the PSFCH, the moment of starting the first timer includes: the first time unit after the PSFCH transmission.
The timer operation method according to claim 3, wherein the moment of restarting the first timer includes any one of the following:

The first time unit after the resource of the second PSFCH;

The first time unit after the second PSFCH transmission.
The timer operation method according to claim 3 or 14, wherein, in the case where HARQ ACK is transmitted via the second PSFCH, the moment of restarting the first timer includes: the first time unit after the second PSFCH transmission;

and / or

In the case of transmitting HARQ NACK via the second PSFCH, the moment of restarting the first timer includes: the first time unit after the second PSFCH transmission.
The timer operation method according to any one of claims 1 to 15, wherein at a time corresponding to the PSFCH, the first communication device starts the first timer, comprising:

When determining that the first condition is met, the first communication device starts a first timer at a time corresponding to the PSFCH;

The first condition includes at least one of the following:

HARQ feedback enable;

HARQ feedback disabled;

cast type is unicast;

cast type is multicast;

The HARQ feedback mode includes a positive feedback confirmation mode;

The HARQ feedback mode includes a negative feedback confirmation mode;

One or more retransmission opportunities are not scheduled in the SCI.
The timer operation method according to any one of claims 1 to 16, wherein after the first communication device starts the first timer and before the first timer times out, the method further comprises:

If resources for PSFCH exist, attempt to retransmit PSFCH.
The timer operation method according to any one of claims 1 to 16, wherein after the first communication device starts the first timer, the method further comprises:

After sending the hybrid automatic repeat request ACK, perform at least one of the following:

Stop running the first timer, or

The second timer is started.
A timer operating device, comprising:

A first starting module, used for starting a first timer at a time corresponding to a physical secondary link feedback channel PSFCH;

A second starting module, used for starting a second timer after the first timer times out;

The first timer includes a side-link discontinuous reception hybrid automatic repeat feedback timer sl-drx-HARQ-RTT-Timer, and the second timer includes a side-link discontinuous reception retransmission timer sl-drx-RetransmissionTimer.
The timer operation device according to claim 19, wherein the first communication device is configured with at least N PSFCH resources, and the first starting module is used to:

At a time corresponding to a first PSFCH, the first communication device starts a first timer, where the first PSFCH is any one or more of at least N PSFCHs, where N is greater than or equal to 2.
The timer operation device according to claim 20, wherein the first starting module is further used for at least one of the following:

At a time corresponding to at least one second PSFCH, the first communications device restarts the first timer; wherein, in the time domain, the transmission resources of the second PSFCH are located after the transmission resources of the first PSFCH; when the running time of the second timer and the transmission resources of the third PSFCH at least partially overlap in the time domain, the first communications device is prohibited from restarting the first timer at the time corresponding to the third PSFCH;

In the case where the running time of the second timer and the transmission resource of the fourth PSFCH at least partially overlap in the time domain In this case, the first communications device restarts the first timer at a time corresponding to the fourth PSFCH, and stops a second timer whose running time at least partially overlaps with the transmission resource of the fourth PSFCH in the time domain;

The third PSFCH is any one of the second PSFCHs, and the fourth PSFCH is any one of the second PSFCHs.
The timer operation device according to any one of claims 19 to 21, wherein the second starting module is used for at least one of the following:

After the last time the first timer is started times out, the first communication device starts a second timer;

After any one of the first timers times out, the first communication device starts a second timer;

After any multiple times of starting the first timer and timeout, the first communication device starts a second timer;

After each time the first timer times out, the first communications device starts a second timer.
The timer operation device according to any one of claims 19 to 22, wherein the device further comprises:

A third starting module, configured to start the second timer by the first communication device after the first timer is started for the Xth time and times out;

A fourth starting module, configured to, after the first timer is started for the Yth time and times out, cause the first communication device to not start the second timer and not monitor the PSCCH and/or PSSCH;

X and Y are positive integers less than N, X and Y are not equal, and N is the number of PSFCHs configured for the first communication device.
The timer operation device according to any one of claims 19 to 22, wherein the device further comprises:

A fifth starting module, configured to start the SL retransmission timer after the first timer is started for the Zth time and times out;

A first monitoring module, configured to, after the first timer is started for the Wth time and times out, not start the SL retransmission timer and monitor the PSCCH and/or PSSCH;

Z and W are positive integers less than N, Z and W are not equal, and N is the number of PSFCHs configured for the first communication device.
The timer operation device according to claim 22, wherein the device further comprises:

A first determining module is used to determine not to monitor the PSCCH and/or PSSCH based on a third event when the first communication device starts the second timer after the last start of the first timer times out;

The third event includes the first timer being started for the Qth time and timing out, where Q is a positive integer less than N.
The timer operation device according to claim 22, wherein the device further comprises:

A second determining module is used to determine to monitor the PSCCH and/or PSSCH based on a fourth event when the first communication device starts the second timer after the last start of the first timer times out;

The fourth event includes the R-th time the first timer is started and times out, the R-th time the first timer is started is not the last time the first timer is started, and R is a positive integer less than N.
The timer operation device according to claim 22, wherein the device further comprises:

A third determining module, configured to determine to monitor the PSCCH and/or the PSSCH based on a fifth event;

The fifth event includes the first timer and the second timer running simultaneously.
The timer operation device according to claim 22, wherein the device further comprises:

A fourth determining module, configured to determine not to monitor the PSCCH and/or PSSCH based on a sixth event;

The sixth event includes the first timer and the second timer running simultaneously.
The timer operation device according to any one of claims 19 to 28, wherein the moment of starting the first timer includes any one of the following:

The first time unit after the resource of the PSFCH;

The first time unit after the PSFCH transmission.
The timer operation device according to any one of claims 19 to 28, wherein, in the case of the PSFCH transmission, the time of starting the first timer includes: the first time unit after the PSFCH transmission;

and / or

In the case that the PSFCH is not transmitted, the time for starting the first timer includes: the first time unit after the resource of the PSFCH.
The timer operation device according to any one of claims 19 to 30, wherein, in the case where HARQ ACK is transmitted via the PSFCH, the moment of starting the first timer includes: the first time unit after the PSFCH transmission;

and / or

In the case of transmitting HARQ NACK through the PSFCH, the moment of starting the first timer includes: the first time unit after the PSFCH transmission.
The timer operation device according to claim 21, wherein the time of restarting the first timer includes any one of the following:

The first time unit after the resource of the second PSFCH;

The first time unit after the second PSFCH transmission.
The timer operation device according to claim 21 or 32, wherein, in the case where HARQ ACK is transmitted via the second PSFCH, the moment of restarting the first timer includes: The first time unit of

and / or

In the case of transmitting HARQ NACK via the second PSFCH, the moment of restarting the first timer includes: the first time unit after the second PSFCH transmission.
The timer operation device according to any one of claims 19 to 33, wherein the first starting module is used to:

When it is determined that the first condition is met, starting a first timer at a time corresponding to the PSFCH;

The first condition includes at least one of the following:

HARQ feedback enable;

HARQ feedback disabled;

cast type is unicast;

cast type is multicast;

The HARQ feedback mode includes a positive feedback confirmation mode;

The HARQ feedback mode includes a negative feedback confirmation mode;

One or more retransmission opportunities are not scheduled in the SCI.
The timer operation device according to any one of claims 19 to 34, wherein the device further comprises:

The retransmission module is used to attempt to retransmit the PSFCH after the first communication device starts the first timer and before the first timer expires, if there are resources for the PSFCH.
The timer operation device according to any one of claims 19 to 35, wherein the device further comprises:

A sixth starting module is configured to, after starting the first timer and after sending a hybrid automatic repeat request confirmation ACK, perform at least one of the following:

Stop running the first timer, or

The second timer is started.
A first communication device comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the timer operation method according to any one of claims 1 to 18 is implemented.
A readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the timer operation method according to any one of claims 1 to 18 is implemented.
A computer program product, wherein the program product is executed by at least one processor to implement the timer operation method according to any one of claims 1 to 18.
A user equipment UE comprises a device configured to execute a timer operation method according to any one of claims 1 to 18.