WO2024160111A1 - Method and apparatus for processing persistent sidelink listen-before-talk (lbt) failure, and terminal - Google Patents

Abstract

The present application belongs to the technical field of communications. Disclosed are a method and apparatus for processing a persistent sidelink listen-before-talk (LBT) failure, and a terminal. The method comprises: when a persistent sidelink LBT failure occurs on a first resource, a terminal executing at least one of a first operation, a second operation and a third operation, wherein the first operation is used for recovering the first resource, the second operation is used for resource switching, and the third operation comprises at least one of the following: stopping all transmissions on the first resource, deactivating the first resource, stopping the transmission of a first message or a first channel on the first resource, clearing or suspending a selected sidelink licensed transmission resource associated with the first resource, clearing or suspending a sidelink configuration licensed type-2 transmission resource associated with the first resource, and clearing or suspending a sidelink configuration licensed type-1 transmission resource associated with the first resource.

Description

Method, device and terminal for handling failure of continuous secondary link LBT (Listen-Before-Talk)

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202310093159.1 filed in China on February 1, 2023 and Chinese Patent Application No. 202310102401.7 filed in China on February 8, 2023, 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 method, device and terminal for handling failure of a continuous secondary link listen-before-talk (LBT).

Background Art

In the new radio unlicensed (NR-U) technology based on unlicensed frequency bands, the Uu interface communication between the terminal (User Equipment, UE) and the base station is supported on the unlicensed frequency band. In the sidelink unlicensed (SL-U) technology based on unlicensed frequency bands, considering the differences between Uu communication and sidelink (SL) communication, for example, in Uu communication, the UL transmission resources used by the UE for uplink (UL) data transmission are uniformly scheduled by the base station; while in SL-U communication, the UE can support two resource allocation modes (mode 1 (i.e. Mode-1) based on the base station scheduling SL transmission resources and mode 2 (i.e. Mode-2) based on the UE autonomously selecting SL transmission resources), therefore, SL-U cannot fully reuse the relevant designs of NR-U.

In unlicensed bands, due to resource competition from other Radio Access Technology (RAT) terminals such as WiFi, the UE may continuously detect Listen Before Talk (LBT) failures. This means that the channel is busy for a period of time and normal communication may not be possible. In particular, in the sidelink unlicensed band scenario, there is currently no solution to how the terminal should handle continuous sidelink LBT failures.

Summary of the invention

The embodiments of the present application provide a method, device and terminal for handling failure of a continuous secondary link LBT (Listen Before Talk) which can solve the related problems of handling failure of a continuous secondary link LBT.

In a first aspect, a method for handling failure of a continuous secondary link listen-before-talk LBT is provided, comprising:

In the case where a persistent secondary link LBT failure occurs on the first resource, the terminal performs at least one of the first operation, the second operation and the third operation; wherein,

The first operation is used to restore the first resource;

The second operation is used for resource switching;

The third operation includes at least one of the following:

stopping all transmissions on the first resource;

Deactivating the first resource;

Stop transmitting a first message or a first channel on the first resource;

clearing or suspending the selected secondary link authorized transmission resource associated with the first resource;

Clearing or suspending the secondary link configuration authorization type 2 transmission resource associated with the first resource;

Clear or suspend the secondary link configuration authorization type 1 transmission resource associated with the first resource.

In a second aspect, a continuous secondary link listen-before-talk LBT failure processing device is provided, which is applied to a terminal, and the device includes:

An execution module, configured to execute at least one of the first operation, the second operation and the third operation when a continuous secondary link LBT failure occurs on the first resource; wherein,

The first operation is used to restore the first resource;

The second operation is used for resource switching;

The third operation includes at least one of the following:

stopping all transmissions on the first resource;

Deactivating the first resource;

Stop transmitting a first message or a first channel on the first resource;

clearing or suspending the selected secondary link authorized transmission resource associated with the first resource;

Clearing or suspending the secondary link configuration authorization type 2 transmission resource associated with the first resource;

Clear or suspend the secondary link configuration authorization type 1 transmission resource associated with the first resource.

According to a third aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be executed on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

In a fourth aspect, a terminal is provided, the terminal comprising a processor and a communication interface, wherein the processor is configured to perform at least one of a first operation, a second operation, and a third operation when a persistent secondary link LBT failure occurs on a first resource; wherein,

The first operation is used to restore the first resource;

The second operation is used for resource switching;

The third operation includes at least one of the following:

stopping all transmissions on the first resource;

Deactivating the first resource;

Stop transmitting a first message or a first channel on the first resource;

clearing or suspending the selected secondary link authorized transmission resource associated with the first resource;

Clearing or suspending the secondary link configuration authorization type 2 transmission resource associated with the first resource;

Clear or suspend the secondary link configuration authorization type 1 transmission resource associated with the first resource.

In a fifth aspect, a communication system is provided, which includes: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method 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 steps of the method described in the first aspect are 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, wherein the computer program/program product is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect.

In an embodiment of the present application, when a persistent sub-link LBT failure occurs on a first resource, the terminal performs at least one of a first operation, a second operation, and a third operation; wherein the first operation is used to restore the first resource; the second operation is used for resource switching; and the third operation includes at least one of the following: stopping all transmissions on the first resource; deactivating the first resource; stopping the transmission of the first message or the first channel on the first resource; clearing or suspending the selected sub-link authorized transmission resource associated with the first resource; clearing or suspending the sub-link configuration authorization type 2 transmission resource associated with the first resource; clearing or suspending the sub-link configuration authorization type 1 transmission resource associated with the first resource. Through the above process, after a persistent sub-link LBT failure occurs on a certain resource, the terminal can quickly handle it, so that the problem of the terminal being unable to transmit data due to the persistent sub-link LBT failure on the resource can be avoided.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a block diagram of a wireless communication system provided by an embodiment of the present application;

FIG2 is a flow chart of a method for processing a continuous secondary link LBT failure provided by an embodiment of the present application;

FIG3 is a flow chart of Example 1 provided in the embodiments of the present application;

FIG4 is a flow chart of Example 2 provided in the embodiments of the present application;

5 is a structural diagram of a device for processing a continuous secondary link LBT failure provided by an embodiment of the present application;

FIG6 is a structural diagram of a communication device provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application.

DETAILED DESCRIPTION

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 this 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 herein, 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, "or" in the specification and claims represents at least one of the connected objects. For example "A or B" covers three solutions, namely, Solution 1: including A but not including B; Solution 2: including B but not including A; Solution 3: including both A and B. The character "/" generally indicates that the objects associated with each other are in an "or" relationship. The term "indication" in the specification and claims of this application can be either an explicit indication or an implicit indication. Among them, an explicit indication can be understood as the sender explicitly informing the receiver of the operation to be performed or the result of the request in the indication sent; an implicit indication can be understood as the receiver making a judgment based on the indication sent by the sender, and determining the operation to be performed or the result of the request based on the judgment result.

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 terminology is used in most of the following description, but these techniques may also be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems.

Fig. 1 shows a block diagram of a wireless communication system applicable to the embodiment of the present application. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may include a relay terminal and a remote terminal. 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 (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (AR)/virtual reality (VR) device, a robot, a wearable device (Wearable Device), a vehicle-mounted device (VUE), a pedestrian terminal (Pedestrian User Equipment, 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 bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), a smart wristband, a smart clothing, etc. In addition to the above-mentioned terminal devices, it can also be a chip inside the terminal, such as a modem chip or a system-on-chip (SoC). It should be noted that the specific type of the terminal 11 is not limited in the embodiments 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 may also be referred to as a wireless access network device, a wireless access network (Radio Access Network, RAN), a wireless access network function or a wireless access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point or a wireless fidelity (Wireless Fidelity, 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 (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), Home Node B, Home Evolved Node B, Transmitting Receiving Point (TRP) or other appropriate term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiments of the present application, only the base station in the NR system is introduced as an example, and the specific type of the base station is not limited.

The 3rd Generation Partnership Project (3GPP) Release 18 is standardizing SL-U communication technology. Specifically, under the control of the base station (gNB), different UEs communicate directly with each other in the unlicensed frequency band using the resources allocated/configured by the base station. In the earlier 3GPP Release 16, the design and standardization of NR-U communication technology have been completed, which can support Uu interface communication between UE and base station in the unlicensed frequency band. Since both are communication technologies based on unlicensed frequency bands, in the design of many specific technical mechanisms, the design principles of SL-U and NR-U are consistent and relevant technical solutions are reused as much as possible. On this basis, considering the differences between Uu communication and SL communication, necessary changes are made to SL-U based on the relevant design of NR-U. For example, in NR-U communication, the UL transmission resources used by the UE for uplink data transmission are uniformly scheduled by the base station; in SL-U communication, the UE can support two resource allocation modes, namely: Mode-1 based on the base station scheduling of SL transmission resources and Mode-2 in which the UE autonomously selects SL transmission resources. Since NR-U has never supported a resource allocation method similar to Mode-2, if a specific technical solution of the existing NR-U is to be applied to SL-U, it is obviously necessary to consider the impact of the resource allocation method of Mode-2 on NR-U, and make necessary changes and corrections based on the existing NR-U design.

Similar to NR-U communication, for SL-U communication, since it works in the unlicensed frequency band, the UE needs to acquire/seize the channel through LBT operation before SL transmission. The following is a brief introduction to LBT technology:

In future communication systems, shared spectrum such as unlicensed bands can be used as a supplement to licensed bands to help operators expand services. Therefore, 3GPP Release 16 standardizes NR-U communication technology as an enhanced feature of 5G NR system. For NR-U, in order to be consistent with NR deployment and maximize NR-based unlicensed access as much as possible, unlicensed bands can operate in 5GHz, 37GHz and 60GHz bands. Since unlicensed bands are shared by multiple technologies (RATs), such as WiFi, radar, Long Time Evolution Licensed Assisted Access (LTE-LAA), etc., unlicensed bands must comply with regulations when used to ensure that all devices can use the resources fairly, such as LBT, Maximum Channel Occupancy Time (MCOT) and other rules. When a transmission node needs to send information, it needs to do LBT first, and then perform power detection (Energy Detection, ED) on the surrounding nodes. When the detected power is lower than a threshold, the channel is considered to be idle, and the transmission node can send. Otherwise, the channel is considered to be busy, and the transmission node cannot send. The transmission node can be a base station, UE, WiFi wireless access point (Access Point, AP), etc. After the transmission node starts transmitting, the occupied channel time (Channel Occupancy Time, COT) cannot exceed MCOT. In addition, according to the occupied channel bandwidth (OCB) rule, in the unlicensed frequency band, the transmission node must occupy at least 70% (60GHz) or 80% (5GHz) of the bandwidth of the entire frequency band during each transmission.

The types of LBT commonly used in NR-U can be divided into Type 1, Type 2A, Type 2B and Type 2C. Type 1 LBT is a channel listening mechanism based on back-off. The transmission node (gNB or UE) monitors the channel for a period of time before a certain transmission. When the transmission node detects that the channel is busy, it backs off and continues to listen until it detects that the channel is empty. Type 2C is that the sending node does not perform LBT, that is, no LBT or immediate transmission. Type 2A and Type 2B LBT are one-shot LBT, that is, the node performs LBT once before transmission. If the channel is empty, it transmits, and if the channel is busy, it does not transmit. The difference is that Type 2A performs LBT within 25us before transmission, while Type 2B performs LBT within 16us before transmission. In particular, for each UL transmission opportunity (including the transmission of the physical uplink control channel (PUCCH)/physical uplink shared channel (PUSCH)/physical random access channel (PRACH) and the transmission of the UL reference signal), the UE usually needs to perform LBT operations for a period of time before performing UL transmission to determine whether the channel is idle. Only when it is determined that the channel is idle can the corresponding UL transmission resources allocated by the base station be used to perform transmission; otherwise, the channel is considered unusable and "LBT failure" is detected.

In the unlicensed band, both NR-U and SL-U designs support a resource structure based on "sub-band". The so-called "sub-band" refers to a part of the entire bandwidth corresponding to a carrier in the unlicensed band. In NR-U and SL-U, a sub-band is called a resource block set (RB set), which corresponds to a set of "time-frequency" resources. The LBT operation of NR-U is performed independently on each RB set. In each cell (i.e., a carrier) of NR-U, the network will configure one or more bandwidth parts (BandWidth Part, BWP) for the UE, where each BWP will contain part of the frequency domain resources in the cell bandwidth, and each BWP can contain one or more RB sets. At the same time, the network will activate a BWP for the UE and schedule UL and DL communication resources for the UE on the activated BWP. The UE is also only allowed to use the resources of the currently activated BWP to communicate on the cell. In view of this, for each UL transmission of the UE, since a BWP may include one or more RB sets in the frequency domain, its UL transmission resources may include resources on one or more RB sets; for each UL transmission, the UE will perform LBT operations on all RB sets involved respectively, and if LBT failure occurs on "any" RB set (i.e., the channel is busy or unavailable), the UE considers that LBT failure is detected for the UL transmission and the UL transmission cannot be performed. In particular, for SL-U, for the transmission resources corresponding to SL channels such as Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Control Channel (PSCCH), Physical Sidelink Feedback Channel (PSFCH), and Physical Sidelink Broadcast Channel (PSBCH): the transmission resources of the three types of channels, PSSCH, PSCCH, and PSFCH, are all included in the SL resource pool (RP), and are (pre) configured to the UE by the network in the form of the resource pool. In other words, any PSSCH, PSSCH, and PSFCH transmissions are carried out in the corresponding SL RP. Correspondingly, the transmission resources of the Sidelink Synchronization Signal Block (S-SSB) are separately (pre) configured by the network and do not belong to any SL RP. That is, the resources used for S-SSB transmission do not belong to any SL RP. A resource pool can contain one or more RB sets (corresponding resources); and an S-SSB transmission resource can also be composed of transmission resources on one or more RB sets.

In unlicensed frequency bands, due to resource competition from other RAT terminals such as WiFi, the UE may continue to detect To LBT failure. This means that the channel is busy for a period of time and normal communication may not be possible. To this end, NR-U supports the UE's "continuous LBT failure" detection and related processing mechanisms, and determines whether to trigger the "continuous LBT failure" process by recording the cumulative number of LBT failures that occur on the currently activated BWP of each cell. Specifically, the UE's physical layer (PHY layer) will perform LBT operations for each UL transmission. When an LBT failure is detected for a certain UL transmission, it will indicate to the Medium Access Control (MAC) layer that an LBT failure has been detected for this UL transmission (i.e., "LBT failure indication"). Since the physical layer will not inform the MAC layer on which specific RB set the LBT failure occurred, the MAC layer believes that the BWP where the current UL transmission is located (i.e., the current activated BWP) detects an LBT failure and accumulates the number of detected LBT failures; when the cumulative number of detected LBT failures for any UL transmission reaches a threshold value configured by the network, the UE triggers a continuous LBT failure. After triggering a persistent LBT failure, the UE will stop communicating on the corresponding cell and BWP, report to the network, and wait for the network to recover from the persistent LBT failure (eg, resource reconfiguration, etc.).

In the sidelink unlicensed scenario, there is currently no solution to what to do when a persistent sidelink (SIDELINK) LBT failure occurs.

In combination with the accompanying drawings, the continuous secondary link LBT failure processing method, continuous secondary link LBT failure processing device, terminal, storage medium, etc. provided in the embodiments of the present application are described in detail through some embodiments and their application scenarios.

Please refer to Figure 2, which is a flow chart of a method for handling a continuous secondary link LBT failure provided by an embodiment of the present application. As shown in Figure 2, the method for handling a continuous secondary link LBT failure includes the following steps:

Step 201: When a continuous secondary link LBT failure occurs on a first resource, the terminal performs at least one of a first operation, a second operation, and a third operation; wherein,

The first operation is used to restore the first resource;

The second operation is used for resource switching;

The third operation includes at least one of the following:

stopping all transmissions on the first resource;

Deactivating the first resource;

Stop transmitting a first message or a first channel on the first resource;

Clearing or suspending a selected sidelink grant transmission resource associated with the first resource;

Clear or suspend a configured sidelink grant type 1 transmission resource associated with the first resource;

Clear or suspend the configured sidelink grant type 2 transmission resource associated with the first resource.

The first resource may be a certain resource granularity, or may be a part of the resources in a certain resource granularity. The resource granularity may include any one of a resource pool, a resource block set, a subchannel, and a bandwidth part.

Among them, for the operation of stopping the transmission of the first message or the first channel on the first resource, the first message may include a discovery message, a PC5 radio resource control (Radio Resource Control, RRC) message, a PC5 media access control control message, and a PC5 media access control message. The first channel may include at least one of a medium access control control element (MAC CE) message, a side link multicast message, and a side link broadcast message. The first channel may include at least one of a PSSCH, a PSCCH, a PSFCH, and a PSBCH.

PSSCH is a physical channel used for data transmission between UEs. Data on PSSCH is transmitted in the form of transport blocks (TB), which contain service data and control signaling of each protocol layer, and are multiplexed to TB for transmission through the MAC layer.

PSCCH is a channel used to transmit Sidelink Control Information (SCI) between UEs. SCI contains scheduling information for scheduling the above-mentioned PSSCH transmission resources. For data reception on SL, the UE first decodes SCI on PSSCH, and determines the corresponding PSSCH resource location based on the scheduling information carried in SCI, thereby decoding TB on the corresponding PSSCH to complete data reception.

PSFCH is a channel used to transmit sidelink feedback signals between UEs. For a received TB, the receiving UE will send a physical layer feedback signal to the transmitting UE on PSFCH to determine whether the TB is received successfully. The PSFCH resource is determined by the PSSCH resource position corresponding to the TB.

PSBCH is a channel used to transmit SL synchronization information between UEs. The SL synchronization information is delivered directly from the RRC protocol layer to the physical layer in the form of SL Master Information Block (MIB) and transmitted through PSBCH.

After a continuous side-link LBT failure occurs on the first resource, in addition to stopping the transmission of the first message or the first channel on the first resource, it is also possible to allow certain messages to continue to be sent on the first resource or allow the transmission of certain channels. In this way, after a continuous side-link LBT failure occurs on the first resource, the terminal can continue to perform LBT on the resource where the continuous side-link LBT failure occurs to know in time when the first resource is restored. Specifically, after a continuous side-link LBT failure occurs on the first resource, the terminal can continue to send certain messages or transmit certain channels on the first resource where the continuous side-link LBT failure occurs. After knowing that the first resource has been restored, the terminal can perform an operation for restoring the first resource, that is, a first operation, to restore the first resource by performing the first operation. After the first resource is restored, the terminal can perform data transmission through the first resource, so that the problem of the terminal being unable to perform data transmission due to the continuous side-link LBT failure on the first resource can be avoided.

After a persistent secondary link LBT failure occurs on the first resource, the terminal can, in addition to taking the above-mentioned methods related to resource recovery, also perform an operation for resource switching (or reselection or change), i.e., a second operation. After a persistent secondary link LBT failure occurs on the first resource, the terminal can avoid the problem of the terminal being unable to perform data transmission due to a persistent secondary link LBT failure on the first resource by performing the second operation for resource switching.

After a persistent secondary link LBT failure occurs on the first resource, the terminal may also perform at least one of the third operations as described above. Furthermore, some of the third operations as described above may be performed in combination with the first operation, or some of the operations may be performed in combination with the second operation. It should be noted that if the terminal performs some of the third operations as described above in combination with the first operation (or the second operation), the terminal may first perform this part of the third operation, and then perform the first operation (or the second operation). For example, in the event of a persistent secondary link LBT failure on the first resource, the terminal may first deactivate the first resource, and then perform the first operation after determining that the first resource has recovered. For another example, In the event that a continuous secondary link LBT failure occurs on the first resource, the terminal may first stop all transmissions on the first resource and then perform the second operation.

In an embodiment of the present application, when a persistent sub-link LBT failure occurs on a first resource, the terminal performs at least one of a first operation, a second operation, and a third operation; wherein the first operation is used to restore the first resource; the second operation is used for resource switching; and the third operation includes at least one of the following: stopping all transmissions on the first resource; deactivating the first resource; stopping the transmission of the first message or the first channel on the first resource; clearing or suspending the selected sub-link authorized transmission resource associated with the first resource; clearing or suspending the sub-link configuration authorization type 2 transmission resource associated with the first resource; clearing or suspending the sub-link configuration authorization type 1 transmission resource associated with the first resource. Through the above process, after a persistent sub-link LBT failure occurs on a certain resource, the terminal can perform corresponding processing, so that the problem of the terminal being unable to transmit data due to a persistent sub-link LBT failure on the resource can be avoided.

In some embodiments, the terminal performs the first operation, including:

When a first target condition is met, the terminal performs the first operation;

The first operation includes at least one of the following:

confirming that the first resource has been restored;

activating the first resource;

A triggered and pending persistent secondary link LBT failure associated with the first resource is canceled.

In this implementation, after a continuous SIDELINK LBT failure occurs on the first resource, the terminal may be allowed to transmit certain messages or certain channels on the first resource so that the terminal knows in time when the first resource is restored. How the terminal determines whether the first resource is restored can be achieved by introducing a first target condition. When the first target condition is met, the terminal can consider that the first resource has been restored, and the terminal executes at least one of the above-mentioned first operations.

In combination with the third operation, if the third operation includes an operation of deactivating the first resource, then when the first target condition is met, the first operation performed by the terminal may include an operation of activating the first resource. If the third operation does not include an operation of deactivating the first resource, then when the first target condition is met, the first operation performed by the terminal may include: an operation of confirming that the first resource has been restored, or an operation of canceling a triggered and pending continuous sub-link LBT failure related to the first resource. It should be noted that after the terminal confirms that the first resource has been restored, or the terminal cancels the triggered and pending continuous sub-link LBT failure related to the first resource, the terminal may transmit data on the first resource according to data transmission requirements.

In some embodiments, the first target condition includes at least one of the following:

A second message is transmitted on the first resource or there is a transmission through a second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure (SL LBT failure);

The second message is transmitted on the first resource or there is a transmission through the second channel, and the number of times of a first counter is greater than or equal to a first threshold, and the first counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the failure of triggering the continuous secondary link LBT is failed;

Within a first preset time period from the moment when the continuous secondary link LBT failure is triggered, the first resource is uploaded the second message is input or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

Within a first preset time period from the moment when the continuous secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the second counter is greater than or equal to a second threshold, and the second counter is used to count the number of successful transmissions of the second message or the second channel from the moment when the continuous secondary link LBT failure is triggered;

Within a first preset time period from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times the physical layer indicates a secondary link LBT failure is less than or equal to a third threshold;

Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the second preset duration;

After the timing duration reaches or exceeds a second preset duration from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the third counter is greater than or equal to a fourth threshold, the third counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the continuous secondary link LBT failure is triggered;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to a fifth threshold;

Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the backoff duration randomly selected by the terminal;

After the timing duration reaches or exceeds the backoff duration randomly selected by the terminal since the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the fourth counter is greater than or equal to a sixth threshold, the fourth counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the continuous secondary link LBT failure is triggered;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to the seventh threshold.

In this implementation manner, “the second message or the second channel is successfully transmitted” can be understood as the second message is transmitted on the first resource or there is transmission through the second channel, and the physical layer does not indicate that the secondary link LBT fails.

The above-mentioned second message may include at least one of a discovery message, a PC5RRC message, a PC5MAC CE message, a sub-link multicast message, and a sub-link broadcast message.

The above-mentioned second channel may include at least one of PSSCH, PSCCH, PSFCH, and PSBCH.

In some embodiments, when the second channel includes a PSBCH (or S-SSB) and satisfies the first target condition, the first operation further includes at least one of the following:

Confirm that the second resource has been restored;

activating the second resource;

Cancel all triggered and pending persistent secondary link LBT failures;

The second resource includes at least one of the following:

The terminal is configured with an exceptional pool;

All or part of the resource pool to which the resource block set where the S-SSB is located belongs;

All or part of the resource pool on the portion of the bandwidth where the S-SSB is located.

Here, the second channel includes PSBCH and meets the first target condition, which can be understood as that the second channel includes PSBCH and the second channel is sent successfully.

In some embodiments, when the second channel includes a PSFCH and the first target condition is met, the first operation further includes at least one of the following:

Confirm that the third resource has been restored;

activating the third resource;

Cancel all triggered and pending persistent secondary link LBT failures;

The third resource includes at least one of the following:

A resource pool (such as Rx pool) for sending or receiving the PSFCH;

The transmission resource pool (such as Tx pool) associated with the terminal sending the PSFCH;

A resource pool that overlaps with the frequency domain or resource block set of the second channel.

Here, the second channel includes PSFCH and meets the first target condition, which can be understood as that the second channel includes PSFCH and the second channel is sent successfully.

In some embodiments, at least one of the first preset duration, the second preset duration, the first counter, the second counter, the third counter, and the fourth counter is configured based on at least one of the secondary link SL logical channel (Logical Channel, LCH) priority, the quality of service (Quality of Service, QoS) of the SL service, the resource granularity of the first resource, the channel type of the second channel, the message type of the second message, the channel access type (channel access type) of the second channel, and the channel access priority (Channel Access Priority Class, CAPC) of the second channel.

It should be noted that the first preset time length and the second preset time length can be set by setting a timer (timer), for example, the first preset time length is set by a first timer (T_Recovery1), and the second preset time length is set by a second timer (T_Recovery2).

In some embodiments, the backoff duration is determined by the terminal according to a backoff time (MaxBackOff);

The backoff time is configured based on at least one of the SL LCH priority, the QoS of the SL service, the resource granularity of the first resource, the channel type of the second channel, the message type of the second message, the channel access type of the second channel and the CAPC of the second channel.

That is to say, all the above configurations or parameters, such as counters, timers, back-off time, etc., can be configured based on each (per) resource granularity, or based on SL logical channel (Logical Channel, LCH) priority configuration, or based on SL service Quality of Service (Quality of Service, QoS) configuration.

For example, based on resource granularity configuration, different parameters can be configured for different pools;

Based on the LCH priority configuration, different configurations or parameters may be configured for different LCH priorities;

Based on QoS configuration, different configurations or parameters can be configured for different QoS;

Based on the channel access type configuration, different configuration parameters can be configured for type1, type2A, type2B, type2C, etc.

Based on the CAPC configuration, different parameters can be configured for different CAPCs;

Based on different channel/message configurations, different counting weights may be configured for different channels/messages. For example, assuming that the weight of S-SSB or PSFCH is small and the weight of PSSCH is large, for example, each success of PSFCH may be counted as 1, and each success of PSSCH may be counted as 5.

In addition, all the above configurations or parameters, such as counters, timers, back-off time, etc., can also be agreed upon through a protocol.

In some embodiments, the method further comprises at least one of the following:

When the physical layer indicates that the secondary link LBT fails, the terminal clears the first counter;

When the physical layer indicates that the secondary link LBT fails, the terminal clears the second counter;

When the physical layer indicates that the secondary link LBT fails, the terminal clears the third counter;

When the physical layer indicates that the secondary link LBT fails, the terminal clears the fourth counter.

The above-mentioned multiple possible first target conditions can be understood as recovery judgment conditions after a continuous SIDELINK LBT failure occurs on the first resource. The following takes the premise condition of "allowing transmission of channel X after a continuous SIDELINK LBT failure occurs on the first resource" as an example to illustrate several recovery judgment conditions:

Condition 1: Transmission of channel X occurs on the first resource, and the terminal determines that the physical layer (which can be Layer 1 (L1)) does not indicate SL LBT failure.

It should be noted that the transmission of channel X occurred on the first resource, and the terminal determined that the physical layer did not indicate SL LBT failure. This situation can be understood as the successful transmission of channel X on the first resource.

Condition 2: The cumulative number of times that transmission of channel X occurs on the first resource, and the cumulative number of times that the terminal determines that the physical layer does not indicate SL LBT failure is greater than or equal to a first threshold (such as N_Recovery, where N_Recovery can be a threshold configured by the network or a threshold defined by the protocol). Here, the cumulative number of times can be counted by setting a counter (COUNTER).

Additionally, during the counting process, if the physical layer indicates an SL LBT failure, the terminal may clear the counter.

Condition 3: On the first resource, from the moment the persistent SIDELINK LBT failure is triggered, the number of times the physical layer indicates SL LBT failure within the first time period (T_Recovery1) is less than or equal to the second threshold.

Here, the second threshold value may be 0, that is, no physical layer indication LBT failure occurs. T_Recovery1 may be a time interval parameter or a first timer. When T_Recovery1 is the first timer, T_Recovery1 may be It is started at the moment of triggering the continuous SIDELINK LBT failure. After T_Recovery1 times out, if the number of times the physical layer indicates SL LBT failure is less than or equal to the second threshold, it can be considered that condition 3 is met.

Condition 4: After a period of time T_Recovery2 has passed since the triggering of the persistent SIDELINK LBT failure.

Here, T_Recovery2 can be a time interval parameter or a second timer. When T_Recovery2 is the second timer, T_Recovery2 can be started at the moment of triggering the continuous SIDELINK LBT failure. When T_Recovery2 times out, it can be considered that condition 4 is met.

Condition 5: On the first resource, after a period of time T_Recovery2 has passed since the triggering of the persistent SIDELINK LBT failure, at least one of the following conditions occurs:

A transmission on channel X occurs and the terminal determines that the physical layer does not indicate an SL LBT failure;

Transmission of channel X occurs and the terminal determines that the cumulative number of times that the physical layer does not indicate SL LBT failure is greater than or equal to a first threshold;

The number of times the physical layer indicates SL LBT failure is less than or equal to the second threshold; here, the second threshold may be 0, i.e., no physical layer indication LBT failure occurs.

Condition 6: From the moment when the persistent sidelink LBT failure is triggered, the UE randomly selects a backoff time based on the backoff time (MaxBackOff), and when the selected backoff time is reached.

Condition 7: On the first resource, from the moment of triggering the persistent sidelink LBT failure, the UE randomly selects a backoff time based on the backoff time (MaxBackOff), and when the backoff time selected by the terminal is reached or exceeded, at least one of the following conditions occurs:

A transmission on channel X occurs and the terminal determines that the physical layer does not indicate an SL LBT failure;

Transmission of channel X occurs and the terminal determines that the cumulative number of times that the physical layer does not indicate SL LBT failure is greater than or equal to a first threshold;

The number of times the physical layer indicates SL LBT failure is less than or equal to the second threshold; here, the second threshold may be 0, i.e., no physical layer indication LBT failure occurs.

In some embodiments, after the terminal performs the second operation, the method further includes:

In a case where the second target condition is met, the terminal cancels the triggered and pending persistent secondary link LBT failure.

In some embodiments, the second target condition includes at least one of the following:

The terminal switches to a second resource where no persistent secondary link LBT failure occurs;

The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource;

The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource, and the terminal determines that the physical layer does not indicate a secondary link LBT failure.

In this implementation, the terminal switches resources after triggering a persistent sidelink LBT failure, and after certain messages or channels are successfully transmitted on the new resources, the terminal cancels all triggered and pending persistent sidelink LBT failures. In this way, the terminal can avoid the terminal being unable to respond due to resource shortages and other situations through resource switching operations. The end cannot transmit data.

The following provides specific examples 1 and 2 to illustrate the overall process of the relevant scheme.

Example 1

As shown in Figure 3, the following steps are included:

Step 301: The UE selects a resource pool and determines the secondary link authorized resources;

Step 302: Before the UE sends the PSCCH or PSSCH on the secondary link granted resources, the UE performs LBT;

Step 303: The UE determines that a continuous secondary link LBT failure is triggered through a series of rules;

Step 304: The UE starts timer A, and the UE continues to send at least one of the following channels or messages on the resource pool that triggers the failure of the continuous secondary link LBT: PSCCH, Discovery message, S-SSB, PSFCH;

Step 305: When the LBT before the channel or message is sent triggers the failure of the secondary link LBT, the timer A is restarted;

Step 306: When timer A times out, the UE cancels all triggered and pending persistent sidelink LBT failures;

Step 307: The UE considers that the resources in the resource pool have been recovered, and continues to use the resource pool to send the PSCCH or PSSCH.

Example 2

As shown in FIG4 , the process includes the following steps:

Step 401: The UE selects a resource pool and determines the secondary link authorized resources;

Step 402: Before the UE sends the PSCCH or PSSCH on the secondary link granted resources, it performs LBT at the resource block set level;

Step 403: The UE determines that a continuous secondary link LBT failure is triggered through a series of rules;

Step 404: UE triggers resource or resource pool reselection;

Step 405: The UE determines new secondary link granted resources in a new resource block set or a new resource pool;

Step 406: Before the UE sends the PSCCH or PSSCH on the new secondary link granted resources, it performs LBT at the resource block set level;

Step 407: After the LBT succeeds, the UE performs PSCCH or PSSCH transmission and cancels all triggered and pending persistent secondary link LBT failures.

In summary, through this application, the UE can promptly determine whether a certain resource has been restored after a continuous sidelink LBT failure occurs, and can promptly use the restored resources for normal data transmission, avoiding the problem of UE being unable to perform data transmission due to resource shortages, etc., and also avoiding the problem of UE not knowing when the resources will be restored.

The method for processing a continuous secondary link LBT failure provided in the embodiment of the present application can be executed by a continuous secondary link LBT failure processing device. In the embodiment of the present application, the continuous secondary link LBT failure processing method is executed by a continuous secondary link LBT failure processing device as an example to illustrate the continuous secondary link LBT failure processing device provided in the embodiment of the present application.

FIG5 shows a structural diagram of a continuous secondary link LBT failure processing device provided in an embodiment of the present application, and the continuous secondary link LBT failure processing device can be applied to a terminal. As shown in FIG5 , the continuous secondary link LBT failure processing device 500 includes:

Execution module 501, configured to execute a first operation when a continuous secondary link LBT failure occurs on a first resource. At least one of the first operation, the second operation and the third operation; wherein,

The first operation is used to restore the first resource;

The second operation is used for resource switching;

The third operation includes at least one of the following:

stopping all transmissions on the first resource;

Deactivating the first resource;

Stop transmitting a first message or a first channel on the first resource;

clearing or suspending the selected secondary link authorized transmission resource associated with the first resource;

Clearing or suspending the secondary link configuration authorization type 2 transmission resource associated with the first resource;

Clear or suspend the secondary link configuration authorization type 1 transmission resource associated with the first resource.

Optionally, the first message includes at least one of a discovery message, a PC5 radio resource control RRC message, a PC5 media access control MAC control unit CE message, a side-link multicast message, and a side-link broadcast message.

Optionally, the first channel includes at least one of a physical side-link shared channel PSSCH, a physical side-link control channel PSCCH, a physical side-link feedback channel PSFCH, and a physical side-link broadcast channel PSBCH.

Optionally, the execution module 501 is specifically used for:

When the first target condition is met, performing the first operation;

The first operation includes at least one of the following:

confirming that the first resource has been restored;

activating the first resource;

A triggered and pending persistent secondary link LBT failure associated with the first resource is canceled.

Optionally, the first target condition includes at least one of the following:

A second message is transmitted on the first resource or there is a transmission through a second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

The second message is transmitted on the first resource or there is a transmission through the second channel, and the number of times of a first counter is greater than or equal to a first threshold, and the first counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the failure of triggering the continuous secondary link LBT is failed;

within a first preset time period from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

Within a first preset time period from the moment when the continuous secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the second counter is greater than or equal to a second threshold, and the second counter is used to count the number of times the second message or the second channel is successfully transmitted from the moment when the continuous secondary link LBT failure is triggered;

The number of times the second message is transmitted on the first resource or there is transmission through the second channel and the physical layer indicates a secondary link LBT failure within a first preset time period from the moment when the persistent secondary link LBT failure is triggered is less than or equal to a third threshold;

Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the second preset duration;

After the timing duration reaches or exceeds a second preset duration from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the third counter is greater than or equal to a fourth threshold, the third counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the continuous secondary link LBT failure is triggered;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to a fifth threshold;

Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the backoff duration randomly selected by the terminal;

After the timing duration reaches or exceeds the backoff duration randomly selected by the terminal since the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the fourth counter is greater than or equal to a sixth threshold, the fourth counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the continuous secondary link LBT failure is triggered;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to the seventh threshold.

Optionally, at least one of the first preset duration, the second preset duration, the first counter, the second counter, the third counter, and the fourth counter is configured based on at least one of the secondary link SL logical channel LCH priority, the quality of service QoS of the SL service, the resource granularity of the first resource, the channel type of the second channel, the message type of the second message, the channel access type of the second channel, and the channel access priority CAPC of the second channel.

Optionally, the backoff duration is determined by the terminal according to a backoff time;

The backoff time is configured based on at least one of the SL LCH priority, the QoS of the SL service, the resource granularity of the first resource, the channel type of the second channel, the message type of the second message, the channel access type of the second channel and the CAPC of the second channel.

Optionally, the continuous secondary link LBT failure processing device 500 further includes at least one of the following items:

A first processing module, configured to clear the first counter when the physical layer indicates that the secondary link LBT fails;

The second processing module is used to clear the second counter when the physical layer indicates that the secondary link LBT fails. zero;

A third processing module, configured to clear the third counter when the physical layer indicates that the secondary link LBT fails;

The fourth processing module is used to clear the fourth counter when the physical layer indicates that the secondary link LBT fails.

Optionally, the second message includes at least one of a discovery message, a PC5RRC message, a PC5MAC CE message, a sub-link multicast message, and a sub-link broadcast message.

Optionally, the second channel includes at least one of PSSCH, PSCCH, PSFCH, and PSBCH.

Optionally, when the second channel includes a PSBCH and satisfies the first target condition, the first operation further includes at least one of the following:

Confirm that the second resource has been restored;

activating the second resource;

Cancel all triggered and pending persistent secondary link LBT failures;

The second resource includes at least one of the following:

The abnormal resource pool configured by the terminal;

All or part of the resource pool to which the resource block set where the secondary link synchronization signal block S-SSB belongs belongs;

All or part of the resource pool on the portion of the bandwidth where the S-SSB is located.

Optionally, when the second channel includes a PSFCH and satisfies the first target condition, the first operation further includes at least one of the following:

Confirm that the third resource has been restored;

activating the third resource;

Cancel all triggered and pending persistent secondary link LBT failures;

The third resource includes at least one of the following:

A resource pool for sending or receiving the PSFCH;

a transmission resource pool associated with a terminal that transmits the PSFCH;

A resource pool that overlaps with the frequency domain or resource block set of the second channel.

Optionally, the continuous secondary link LBT failure processing device 500 further includes:

The fifth processing module is configured to cancel the triggered and pending continuous secondary link LBT failure when the second target condition is met.

Optionally, the second target condition includes at least one of the following:

The terminal switches to a second resource where no persistent secondary link LBT failure occurs;

The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource;

The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource, and the terminal determines that the physical layer has no Indicates that the secondary link LBT failed.

Optionally, the first resource is a resource granularity or a partial resource in the resource granularity, and the resource granularity includes any one of a carrier, a resource pool, a resource block set, a subchannel and a bandwidth part.

The continuous sub-link LBT failure processing 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 the 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 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 continuous secondary link LBT failure processing device provided in the embodiment of the present application can implement the various processes implemented by the method embodiments of Figures 2 to 4 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

Optionally, as shown in FIG6 , the embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602, wherein the memory 602 stores a program or instruction that can be run on the processor 601, and when the program or instruction is executed by the processor 601, each step of the above-mentioned continuous secondary link LBT failure processing method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

The embodiment of the present application further provides a terminal, including a processor and a communication interface, wherein the processor is configured to perform at least one of a first operation, a second operation, and a third operation when a persistent secondary link LBT failure occurs on a first resource; wherein,

The first operation is used to restore the first resource;

The second operation is used for resource switching;

The third operation includes at least one of the following:

stopping all transmissions on the first resource;

Deactivating the first resource;

Stop transmitting a first message or a first channel on the first resource;

clearing or suspending the selected secondary link authorized transmission resource associated with the first resource;

Clearing or suspending the secondary link configuration authorization type 1 transmission resource associated with the first resource;

Clear or suspend the secondary link configuration authorization type 2 transmission resource associated with the first resource.

This terminal embodiment corresponds to the above method embodiment. Each implementation process and implementation method of the above method embodiment can be applied to this terminal embodiment and can achieve the same technical effect.

Specifically, FIG7 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

The terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709 and at least some of the components of a processor 710.

Those skilled in the art will appreciate that the terminal 700 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 710 through a power management system, so that the power management system can manage charging, discharging, and power consumption. The present invention may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

It should be understood that in the embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processor 7041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and at least one of other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 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 701 can transmit the data to the processor 710 for processing; in addition, the RF unit 701 can send uplink data to the network side device. Generally, the RF unit 701 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

The memory 709 can be used to store software programs or instructions and various data. The memory 709 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 709 may include a volatile memory or a non-volatile memory, or the memory 709 may include both a volatile and a non-volatile memory, or the memory 709 may include a non-transient memory. Among them, the non-volatile memory or non-transient 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 709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

The processor 710 may include one or more processing units; optionally, the processor 710 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 710.

The processor 710 is used for:

In the case of a persistent secondary link LBT failure on the first resource, at least one of the first operation, the second operation and the third operation is performed; wherein,

The first operation is used to restore the first resource;

The second operation is used for resource switching;

The third operation includes at least one of the following:

stopping all transmissions on the first resource;

Deactivating the first resource;

Stop transmitting a first message or a first channel on the first resource;

clearing or suspending the selected secondary link authorized transmission resource associated with the first resource;

Clearing or suspending the secondary link configuration authorization type 2 transmission resource associated with the first resource;

Clear or suspend the secondary link configuration authorization type 1 transmission resource associated with the first resource.

In an embodiment of the present application, when a persistent sub-link LBT failure occurs on a first resource, the terminal performs at least one of a first operation, a second operation, and a third operation; wherein the first operation is used to restore the first resource; the second operation is used for resource switching; and the third operation includes at least one of the following: stopping all transmissions on the first resource; deactivating the first resource; stopping the transmission of the first message or the first channel on the first resource; clearing or suspending the selected sub-link authorized transmission resource associated with the first resource; clearing or suspending the sub-link configuration authorization type 2 transmission resource associated with the first resource; clearing or suspending the sub-link configuration authorization type 1 transmission resource associated with the first resource. Through the above process, after a persistent sub-link LBT failure occurs on a certain resource, the terminal can perform corresponding processing, so that the problem of the terminal being unable to transmit data due to a persistent sub-link LBT failure on the resource can be avoided.

Optionally, the first message includes at least one of a discovery message, a PC5 radio resource control RRC message, a PC5 media access control MAC control unit CE message, a side-link multicast message, and a side-link broadcast message.

Optionally, the first channel includes at least one of a physical side-link shared channel PSSCH, a physical side-link control channel PSCCH, a physical side-link feedback channel PSFCH, and a physical side-link broadcast channel PSBCH.

Optionally, the processor 710 is further configured to:

When the first target condition is met, performing the first operation;

The first operation includes at least one of the following:

confirming that the first resource has been restored;

activating the first resource;

A triggered and pending persistent secondary link LBT failure associated with the first resource is canceled.

Optionally, the first target condition includes at least one of the following:

A second message is transmitted on the first resource or there is a transmission through a second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

The second message is transmitted on the first resource or there is a transmission through the second channel, and the number of times of a first counter is greater than or equal to a first threshold, and the first counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the failure of triggering the continuous secondary link LBT is failed;

Within a first preset time period from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate that the secondary link LBT failed;

Within a first preset time period from the moment when the continuous secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the second counter is greater than or equal to a second threshold, and the second counter is used to count the number of times the second message or the second channel is successfully transmitted from the moment when the continuous secondary link LBT failure is triggered;

Within a first preset time period from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times the physical layer indicates a secondary link LBT failure is less than or equal to a third threshold;

Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the second preset duration;

After the timing duration reaches or exceeds a second preset duration from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the third counter is greater than or equal to a fourth threshold, the third counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the continuous secondary link LBT failure is triggered;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to a fifth threshold;

Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the backoff duration randomly selected by the terminal;

After the timing duration reaches or exceeds the backoff duration randomly selected by the terminal since the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the fourth counter is greater than or equal to a sixth threshold, the fourth counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the continuous secondary link LBT failure is triggered;

Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to the seventh threshold.

Optionally, at least one of the first preset duration, the second preset duration, the first counter, the second counter, the third counter, and the fourth counter is configured based on at least one of the secondary link SL logical channel LCH priority, the quality of service QoS of the SL service, the resource granularity of the first resource, the channel type of the second channel, the message type of the second message, the channel access type of the second channel, and the channel access priority CAPC of the second channel.

Optionally, the backoff duration is determined by the terminal according to a backoff time;

The backoff time is configured based on at least one of the SL LCH priority, the QoS of the SL service, the resource granularity of the first resource, the channel type of the second channel, the message type of the second message, the channel access type of the second channel and the CAPC of the second channel.

Optionally, the processor 710 is further configured to perform at least one of the following:

When the physical layer indicates that the secondary link LBT fails, clearing the first counter;

When the physical layer indicates that the secondary link LBT fails, clearing the second counter;

When the physical layer indicates that the secondary link LBT fails, clearing the third counter;

When the physical layer indicates that the secondary link LBT fails, the terminal clears the fourth counter.

Optionally, the second message includes at least one of a discovery message, a PC5RRC message, a PC5MAC CE message, a sub-link multicast message, and a sub-link broadcast message.

Optionally, the second channel includes at least one of PSSCH, PSCCH, PSFCH, and PSBCH.

Optionally, when the second channel includes a PSBCH and satisfies the first target condition, the first operation further includes at least one of the following:

Confirm that the second resource has been restored;

activating the second resource;

Cancel all triggered and pending persistent secondary link LBT failures;

The second resource includes at least one of the following:

The abnormal resource pool configured by the terminal;

All or part of the resource pool to which the resource block set where the secondary link synchronization signal block S-SSB belongs belongs;

All or part of the resource pool on the portion of the bandwidth where the S-SSB is located.

Optionally, when the second channel includes a PSFCH and satisfies the first target condition, the first operation further includes at least one of the following:

Confirm that the third resource has been restored;

activating the third resource;

Cancel all triggered and pending persistent secondary link LBT failures;

The third resource includes at least one of the following:

A resource pool for sending or receiving the PSFCH;

a transmission resource pool associated with a terminal that transmits the PSFCH;

A resource pool that overlaps with the frequency domain or resource block set of the second channel.

Optionally, the processor 710 is further configured to:

In case the second target condition is met, the triggered and pending persistent secondary link LBT failure is canceled.

Optionally, the second target condition includes at least one of the following:

The terminal switches to a second resource where no persistent secondary link LBT failure occurs;

The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource;

The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource, and the terminal determines that the physical layer does not indicate a secondary link LBT failure.

Optionally, the first resource is a resource granularity or a partial resource in the resource granularity, and the resource granularity includes any one of a carrier, a resource pool, a resource block set, a subchannel and a bandwidth part.

In summary, through this application, the UE can promptly determine whether a certain resource has been restored after a continuous sidelink LBT failure occurs, and can promptly use the restored resources for normal data transmission, avoiding the problem of UE being unable to perform data transmission due to resource shortages, etc., and also avoiding the problem of UE not knowing when the resources will be restored.

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, each process of the above-mentioned continuous sub-link LBT failure processing method embodiment is 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 continuous sub-link LBT failure processing 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.

An embodiment of the present application further provides a computer program/program product, which is stored in a non-volatile storage medium. The computer program/program product is executed by at least one processor to implement the various processes of the above-mentioned continuous sub-link LBT failure processing 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 communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the above-mentioned method for handling continuous secondary link LBT failure.

It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a 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, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment 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 above description of the implementation mode, those skilled in the art can clearly understand that the above embodiment method can be It can be implemented by means of software plus a necessary general hardware platform, or by hardware, but in many cases the former is a better implementation method. Based on this 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, disk, CD), and includes several instructions for a terminal (which can be a mobile phone, computer, server, air conditioner, or network side device, 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 (32)

A method for handling failure of a continuous secondary link listen-before-talk LBT, comprising: In the case where a persistent secondary link LBT failure occurs on the first resource, the terminal performs at least one of the first operation, the second operation and the third operation; wherein, The first operation is used to restore the first resource; The second operation is used for resource switching; The third operation includes at least one of the following: stopping all transmissions on the first resource; Deactivating the first resource; Stop transmitting a first message or a first channel on the first resource; clearing or suspending the selected secondary link authorized transmission resource associated with the first resource; Clearing or suspending the secondary link configuration authorization type 1 transmission resource associated with the first resource; Clear or suspend the secondary link configuration authorization type 2 transmission resource associated with the first resource. According to the method according to claim 1, the first message includes at least one of a discovery message, a PC5 radio resource control RRC message, a PC5 media access control MAC control unit CE message, a side link multicast message, and a side link broadcast message. The method according to claim 1, wherein the first channel includes at least one of a physical sidelink shared channel PSSCH, a physical sidelink control channel PSCCH, a physical sidelink feedback channel PSFCH, and a physical sidelink broadcast channel PSBCH. The method according to claim 1, wherein the terminal performs the first operation, comprising: When a first target condition is met, the terminal performs the first operation; The first operation includes at least one of the following: confirming that the first resource has been restored; activating the first resource; A triggered and pending persistent secondary link LBT failure associated with the first resource is canceled. The method according to claim 4, wherein the first target condition includes at least one of the following: A second message is transmitted on the first resource or there is a transmission through a second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure; The second message is transmitted on the first resource or there is a transmission through the second channel, and the number of times of a first counter is greater than or equal to a first threshold, and the first counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the failure of triggering the continuous secondary link LBT is failed; within a first preset time period from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure; Within a first preset time period from the moment when the continuous secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the second counter is greater than or equal to a second threshold, and the second counter is used to count the number of times the second message or the second channel is successfully transmitted from the moment when the continuous secondary link LBT failure is triggered; Within a first preset time period from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times the physical layer indicates a secondary link LBT failure is less than or equal to a third threshold; Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the second preset duration; After the timing duration reaches or exceeds a second preset duration from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure; Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the third counter is greater than or equal to a fourth threshold, the third counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the continuous secondary link LBT failure is triggered; Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to a fifth threshold; Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the backoff duration randomly selected by the terminal; After the timing duration reaches or exceeds the backoff duration randomly selected by the terminal since the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure; Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the fourth counter is greater than or equal to a sixth threshold, the fourth counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the continuous secondary link LBT failure is triggered; Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to the seventh threshold. The method according to claim 5, wherein at least one of the first preset duration, the second preset duration, the first counter, the second counter, the third counter, and the fourth counter is configured based on at least one of the following: Secondary link SL logical channel LCH priority; QoS of SL services; a resource granularity of the first resource; a channel type of the second channel; a message type of the second message; a channel access type of the second channel; The channel access priority level CAPC of the second channel. The method according to claim 5, wherein the backoff duration is determined by the terminal according to a backoff time; The backoff time is configured based on at least one of the SL LCH priority, the QoS of the SL service, the resource granularity of the first resource, the channel type of the second channel, the message type of the second message, the channel access type of the second channel and the CAPC of the second channel. The method according to claim 5, wherein the method further comprises at least one of the following: When the physical layer indicates that the secondary link LBT fails, the terminal clears the first counter; When the physical layer indicates that the secondary link LBT fails, the terminal clears the second counter; When the physical layer indicates that the secondary link LBT fails, the terminal clears the third counter; When the physical layer indicates that the secondary link LBT fails, the terminal clears the fourth counter. According to the method according to claim 5, the second message includes at least one of a discovery message, a PC5RRC message, a PC5MAC CE message, a sub-link multicast message, and a sub-link broadcast message. The method according to claim 5, wherein the second channel includes at least one of PSSCH, PSCCH, PSFCH, and PSBCH. The method according to claim 10, wherein, when the second channel includes a PSBCH and the first target condition is met, the first operation further includes at least one of the following: Confirm that the second resource has been restored; activating the second resource; Cancel all triggered and pending persistent secondary link LBT failures; The second resource includes at least one of the following: The abnormal resource pool configured by the terminal; All or part of the resource pool to which the resource block set where the secondary link synchronization signal block S-SSB belongs belongs; All or part of the resource pool on the portion of the bandwidth where the S-SSB is located. The method according to claim 10, wherein, when the second channel includes a PSFCH and the first target condition is met, the first operation further includes at least one of the following: Confirm that the third resource has been restored; activating the third resource; Cancel all triggered and pending persistent secondary link LBT failures; The third resource includes at least one of the following: A resource pool for sending or receiving the PSFCH; a transmission resource pool associated with a terminal that transmits the PSFCH; A resource pool that overlaps with the frequency domain or resource block set of the second channel. The method according to claim 1, wherein after the terminal performs the second operation, the method further comprises: In a case where the second target condition is met, the terminal cancels the triggered and pending persistent secondary link LBT failure. The method according to claim 13, wherein the second target condition includes at least one of the following: The terminal switches to a second resource where no persistent secondary link LBT failure occurs; The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource; The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource, and the terminal determines that the physical layer does not indicate a secondary link LBT failure. The method according to any one of claims 1 to 14, wherein the first resource is a resource granularity or a partial resource in the resource granularity, and the resource granularity includes any one of a carrier, a resource pool, a resource block set, a subchannel and a bandwidth part. A device for processing failure of continuous secondary link listen-before-talk LBT, applied to a terminal, the device comprising: An execution module, configured to execute at least one of the first operation, the second operation and the third operation when a continuous secondary link LBT failure occurs on the first resource; wherein, The first operation is used to restore the first resource; The second operation is used for resource switching; The third operation includes at least one of the following: stopping all transmissions on the first resource; deactivating the first resource; Stop transmitting a first message or a first channel on the first resource; clearing or suspending the selected secondary link authorized transmission resource associated with the first resource; Clearing or suspending the secondary link configuration authorization type 1 transmission resource associated with the first resource; Clear or suspend the secondary link configuration authorization type 2 transmission resource associated with the first resource. The device according to claim 16, wherein the first message includes at least one of a discovery message, a PC5 radio resource control RRC message, a PC5 media access control MAC control unit CE message, a side link multicast message, and a side link broadcast message. The apparatus according to claim 16, wherein the first channel comprises at least one of a physical sublink shared channel (PSSCH), a physical sublink control channel (PSCCH), a physical sublink feedback channel (PSFCH), and a physical sublink broadcast channel (PSBCH). The apparatus according to claim 16, wherein the execution module is specifically configured to: When the first target condition is met, performing the first operation; The first operation includes at least one of the following: confirming that the first resource has been restored; activating the first resource; A triggered and pending persistent secondary link LBT failure associated with the first resource is canceled. The apparatus according to claim 19, wherein the first target condition comprises at least one of the following: A second message is transmitted on the first resource or there is a transmission through a second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure; The second message is transmitted on the first resource or there is a transmission through the second channel, and the number of times of a first counter is greater than or equal to a first threshold, and the first counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the failure of triggering the continuous secondary link LBT is failed; within a first preset time period from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure; Within a first preset time period from the moment when the continuous secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the second counter is greater than or equal to a second threshold, and the second counter is used to count the number of times the second message or the second channel is successfully transmitted from the moment when the continuous secondary link LBT failure is triggered; Within a first preset time period from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times the physical layer indicates a secondary link LBT failure is less than or equal to a third threshold; Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the second preset duration; After the timing duration reaches or exceeds a second preset duration from the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure; Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the second message is transmitted on the first resource or there is transmission through the second channel, and the number of times of the third counter is greater than or equal to a fourth threshold, the third counter is used to count the number of successful transmissions of the second message or the second channel since the moment when the continuous secondary link LBT failure is triggered; Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the second preset duration, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to a fifth threshold; Since the moment when the continuous secondary link LBT failure is triggered, the timing duration reaches or exceeds the backoff duration randomly selected by the terminal; After the timing duration reaches or exceeds the backoff duration randomly selected by the terminal since the moment when the persistent secondary link LBT failure is triggered, the second message is transmitted on the first resource or there is a transmission through the second channel, and the terminal determines that the physical layer does not indicate a secondary link LBT failure; Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the second message is transmitted on the first resource or there is a transmission through the second channel, and the The number of the fourth counter is greater than or equal to a sixth threshold, the fourth counter being used to count the number of successful transmissions of the second message or the second channel since the moment when the failure of the continuous secondary link LBT is triggered; Since the moment when the continuous secondary link LBT failure is triggered, after the timing duration reaches or exceeds the backoff duration randomly selected by the terminal, the number of times the physical layer indicates that the secondary link LBT failure is less than or equal to the seventh threshold. The apparatus according to claim 20, wherein at least one of the first preset duration, the second preset duration, the first counter, the second counter, the third counter, and the fourth counter is configured based on at least one of the following: Secondary link SL logical channel LCH priority; QoS of SL services; a resource granularity of the first resource; a channel type of the second channel; a message type of the second message; a channel access type of the second channel; The channel access priority level CAPC of the second channel. The apparatus according to claim 20, wherein the backoff duration is determined by the terminal according to a backoff time; The backoff time is configured based on at least one of the SL LCH priority, the QoS of the SL service, the resource granularity of the first resource, the channel type of the second channel, the message type of the second message, the channel access type of the second channel and the CAPC of the second channel. The device according to claim 20, wherein the device further comprises at least one of the following: A first processing module, configured to clear the first counter when the physical layer indicates that the secondary link LBT fails; A second processing module, configured to clear the second counter to zero when the physical layer indicates that the secondary link LBT fails; A third processing module, configured to clear the third counter when the physical layer indicates that the secondary link LBT fails; The fourth processing module is used to clear the fourth counter when the physical layer indicates that the secondary link LBT fails. According to the device according to claim 20, wherein the second message includes at least one of a discovery message, a PC5RRC message, a PC5MAC CE message, a sub-link multicast message, and a sub-link broadcast message. The apparatus according to claim 20, wherein the second channel comprises at least one of a PSSCH, a PSCCH, a PSFCH, and a PSBCH. The apparatus according to claim 25, wherein, when the second channel includes a PSBCH and the first target condition is satisfied, the first operation further comprises at least one of the following: Confirm that the second resource has been restored; activating the second resource; Cancel all triggered and pending persistent secondary link LBT failures; The second resource includes at least one of the following: The abnormal resource pool configured by the terminal; All or part of the resource pool to which the resource block set where the secondary link synchronization signal block S-SSB belongs belongs; All or part of the resource pool on the portion of the bandwidth where the S-SSB is located. The apparatus according to claim 25, wherein, when the second channel includes a PSFCH and the first target condition is met, the first operation further includes at least one of the following: Confirm that the third resource has been restored; activating the third resource; Cancel all triggered and pending persistent secondary link LBT failures; The third resource includes at least one of the following: A resource pool for sending or receiving the PSFCH; a transmission resource pool associated with a terminal that transmits the PSFCH; A resource pool that overlaps with the frequency domain or resource block set of the second channel. The device according to claim 16, wherein the device further comprises: The fifth processing module is configured to cancel the triggered and pending continuous secondary link LBT failure when the second target condition is met. The apparatus according to claim 28, wherein the second target condition comprises at least one of the following: The terminal switches to a second resource where no persistent secondary link LBT failure occurs; The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource; The terminal switches to a second resource where no persistent secondary link LBT failure occurs, and performs at least one transmission of a third message or at least one transmission through a third channel on the second resource, and the terminal determines that the physical layer does not indicate a secondary link LBT failure. The device according to any one of claims 16 to 29, wherein the first resource is a resource granularity or a partial resource in the resource granularity, and the resource granularity includes any one of a carrier, a resource pool, a resource block set, a subchannel and a bandwidth part. A terminal 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 steps of the continuous sub-link listen-before-talk (LBT) failure processing method as described in any one of claims 1 to 15 are implemented. A readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps of the continuous sub-link listen-before-talk (LBT) failure processing method as described in any one of claims 1 to 15 are implemented.