CN116980906A

CN116980906A - Processing method, terminal and network equipment for consistency LBT failure

Info

Publication number: CN116980906A
Application number: CN202211262414.2A
Authority: CN
Inventors: 赵亚利
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2022-04-22
Filing date: 2022-10-14
Publication date: 2023-10-31

Abstract

The embodiment of the application relates to the technical field of wireless communication, in particular to a method for processing consistent LBT failure, a terminal and network equipment, which are used for providing an effective solution after the terminal generates the consistent LBT failure on one carrier wave or BWP of a direct communication interface. The terminal of the embodiment of the application executes LBT on the target object of the direct communication interface; wherein the target object is a frequency domain resource unit configured by a direct communication interface or in an activated state; if it is determined that the consistent LBT fails on the target object, the terminal performs reselection of the target object, or reports first indication information to a network device serving the target object, or determines SL RLF.

Description

Processing method, terminal and network equipment for consistency LBT failure

The present application claims priority from chinese patent application filed 22 months 2022 at 04, filed with chinese patent office under application number 202210428673.1, entitled "a method for handling consistent LBT failure, terminal and network device", the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a method, a terminal, and a network device for processing consistent LBT failure.

Background

The traditional wireless communication adopts a cellular network communication mode, namely, a terminal and network side equipment transmit uplink and downlink data/control information through a Uu interface. Direct communication refers to the manner in which nearby terminals can communicate data over a direct communication link (also known as a sidlink or PC 5) within a close range. The wireless interface to which the sidlink link corresponds is referred to as a direct communication interface (also referred to as a sidlink interface or PC5 interface).

For shared spectrum (also referred to as unlicensed spectrum, i.e. unlicensed spectrum), the terminal transmitter needs to monitor the control channel before sending data, i.e. support the listen before talk (Listen Before Talk, LBT) mechanism. The LBT mechanism is introduced in order to avoid collisions as much as possible when different terminals use the shared spectrum.

The third generation partnership project (3rd Generation Partnership Project,3GPP) New Radio, NR) Rel-16 direct communication system has only one Bandwidth Part (BWP) for the direct communication interface, but Rel-18 would consider the direct communication interface to support multi-carrier or multi-BWP. When a terminal communicates using one carrier or BWP of the direct communication interface, if a consistent LBT failure occurs on the one carrier or BWP, there is currently no corresponding solution.

Disclosure of Invention

The embodiment of the application provides a method, a terminal and network equipment for processing consistent LBT failure, which are used for providing an effective solution after the terminal generates the consistent LBT failure on one carrier wave or BWP of a direct communication interface.

In a first aspect, an embodiment of the present application provides a method for processing a consistent LBT failure, where the method includes:

the terminal performs LBT on a target object of the direct communication interface; wherein the target object is a frequency domain resource unit configured by the direct communication interface or in an active state, and the frequency domain resource unit comprises one of a carrier, a BWP, a resource pool, a frequency subband and a radio resource block set;

if the consistency LBT failure occurs on the target object, the terminal executes the reselection of the target object, or reports first indication information to network equipment serving the target object, or determines SL RLF; the first indication information is used for indicating that the terminal fails to perform consistent LBT on the direct communication interface or that the terminal fails to perform consistent LBT on the target object on the direct communication interface.

Optionally, the terminal performs reselection of the target object, specifically including:

the terminal determines a candidate object set corresponding to the direct communication interface, wherein the candidate object set comprises at least one candidate object;

and the terminal reselects a direct communication interface target object from the candidate target object set.

Optionally, each candidate object in the candidate object set satisfies some or all of the following conditions:

each candidate target object in the candidate target object set is a target object of a direct communication interface supported by the terminal capability;

channel measurement results corresponding to all candidate target objects in the candidate target object set are larger than or equal to a preset threshold;

each candidate target object in the candidate target object set is a target object available to the network device accessed by the terminal for the direct communication interface configured by the terminal.

Optionally, after the terminal performs the target object reselection, the method further includes:

and if the target object selected again from the candidate target object set is the shared spectrum, the terminal executes LBT on the selected target object.

if the terminal determines that the consistency LBT fails in each candidate target object in the candidate target object set, the MAC layer of the terminal reports the consistency LBT failure of the terminal on the direct communication interface to the higher layer of the terminal.

Optionally, the method further comprises:

and after the higher layer of the terminal receives the consistency LBT failure of the terminal on the direct communication interface, which is reported by the MAC layer of the terminal, the terminal determines that SL RLF occurs.

Optionally, after the terminal determines that SL RLF occurs, the method further includes:

if the terminal is in the RRC connection state, the terminal reports a first message to network equipment serving the terminal; the first message is an RRC message or a MAC CE.

Optionally, if the terminal is in a radio resource control RRC connected state, the terminal reports a first message to a network device serving the terminal, including:

and if the terminal is in the RRC connection state and the terminal uses a resource allocation mode of network scheduling, the terminal reports a first message to network equipment serving the terminal.

Optionally, the first message needs to carry second indication information, where the second indication information is used to indicate that the terminal generates SL RLF because the terminal generates a consistent LBT failure on the direct communication interface.

Optionally, the reporting, by the terminal, the first indication information to the network device serving the terminal includes:

and if the terminal is in the RRC connection state or the terminal is in the RRC connection state and the terminal uses the resource allocation mode of network scheduling, the terminal reports first indication information to network equipment serving the terminal.

Optionally, the terminal reports the first indication information to the network device serving the terminal, which specifically includes:

the terminal reports first indication information to the network equipment in an RRC signaling or MAC CE mode;

the RRC signaling or the MAC CE at least comprises identification information of the target object and/or link identification of the direct communication interface;

the link identification of the direct communication interface includes some or all of the following information:

direct communication interface destination address, direct communication interface source address, cast type.

Optionally, after the terminal reports the first indication information to the network device, the method further includes:

Receiving a target object reconfiguration signaling sent by the network equipment; or (b)

And receiving a direct communication interface connection release notification message issued by the network equipment.

In a second aspect, an embodiment of the present application provides a method for processing a consistent LBT failure, where the method includes:

the network equipment receives first indication information reported by a terminal, wherein the first indication information is used for indicating that the terminal has consistent LBT failure on a direct communication interface or the terminal has consistent LBT failure on a target object of the direct communication interface; the target object is a frequency domain resource unit configured by the direct communication interface or in an activated state, and the frequency domain resource unit comprises one of a carrier wave, a BWP, a resource pool, a frequency sub-band and a radio resource block set;

and the network equipment sends a target object reconfiguration signaling to the terminal or informs the terminal to release the direct communication interface connection.

Optionally, the method further comprises:

the network equipment receives a first message reported by the terminal; the first message is an RRC message or an MAC CE;

and the first message is reported to the network equipment after the terminal determines that the SL RLF occurs.

In a third aspect, an embodiment of the present application provides a terminal, including a memory, a processor, and a transceiver;

the memory is used for storing a computer program;

the transceiver is used for receiving and transmitting data under the control of the processor;

the processor is configured to read the computer program in the memory and perform the following operations:

performing LBT on a target object of the direct communication interface; wherein the target object is a frequency domain resource unit configured by the direct communication interface or in an active state, and the frequency domain resource unit comprises one of a carrier, a BWP, a resource pool, a frequency subband and a radio resource block set;

if the consistency LBT failure occurs on the target object, performing target object reselection, or reporting first indication information to network equipment serving the target object, or determining SL RLF; the first indication information is used for indicating that the terminal fails to perform consistent LBT on the direct communication interface or that the terminal fails to perform consistent LBT on the target object on the direct communication interface.

Optionally, the processor is specifically configured to:

determining a candidate target object set corresponding to the direct communication interface, wherein the candidate target object set comprises at least one candidate target object;

and re-selecting the direct communication interface target object from the candidate target object set.

Optionally, after performing the target object reselection, the processor is further configured to:

and if the target object selected again from the candidate target object set is the shared spectrum, performing LBT on the target object selected again.

If it is determined that the consistency LBT failure occurs in each candidate object in the candidate object set, reporting, by the MAC layer of the terminal, to a higher layer of the terminal that the consistency LBT failure occurs in the direct communication interface by the terminal.

Optionally, the processor is further configured to:

and after receiving the consistency LBT failure of the direct communication interface of the terminal reported by the MAC layer of the terminal, the higher layer of the terminal determines that SL RLF occurs.

Optionally, after determining that SL RLF has occurred, the processor is further configured to:

if the terminal is in the RRC connection state, reporting a first message to network equipment serving the terminal; the first message is an RRC message or a MAC CE.

Optionally, the processor is specifically configured to:

and if the terminal is in the RRC connection state and the terminal uses a resource allocation mode of network scheduling, reporting a first message to network equipment serving the terminal.

Optionally, the processor is specifically configured to:

and if the terminal is in the RRC connection state or the terminal is in the RRC connection state and uses the resource allocation mode of network scheduling, reporting first indication information to network equipment serving the terminal.

Optionally, the processor is specifically configured to:

reporting first indication information to the network equipment by adopting an RRC signaling or MAC CE mode;

Optionally, after reporting the first indication information to the network device, the processor is further configured to:

In a fourth aspect, an embodiment of the present application provides a network device, including a memory, a processor, and a transceiver;

the memory is used for storing a computer program;

receiving first indication information reported by a terminal, wherein the first indication information is used for indicating that the terminal has consistent LBT failure on a direct communication interface or the terminal has consistent LBT failure on a target object of the direct communication interface; the target object is a frequency domain resource unit configured by the direct communication interface or in an activated state, and the frequency domain resource unit comprises one of a carrier wave, a BWP, a resource pool, a frequency sub-band and a radio resource block set;

and sending a target object reconfiguration signaling to the terminal or informing the terminal to release the direct communication interface connection.

Optionally, the processor is further configured to:

receiving a first message reported by the terminal; the first message is an RRC message or an MAC CE;

In a fifth aspect, an embodiment of the present application provides a processing apparatus for consistent LBT failure, where the apparatus includes:

an execution module for executing LBT on a target object of the direct communication interface; wherein the target object is a frequency domain resource unit configured by the direct communication interface or in an active state, and the frequency domain resource unit comprises one of a carrier, a BWP, a resource pool, a frequency subband and a radio resource block set;

the processing module is used for executing reselection of the target object if the consistency LBT failure occurs on the target object, or reporting first indication information to network equipment serving the target object, or determining that the direct link radio link fails SL RLF; the first indication information is used for indicating that the terminal fails to perform consistent LBT on the direct communication interface or that the terminal fails to perform consistent LBT on the target object on the direct communication interface.

In a sixth aspect, an embodiment of the present application provides a processing apparatus for consistent LBT failure, where the apparatus includes:

the receiving module is used for receiving first indication information reported by the terminal, wherein the first indication information is used for indicating that the terminal has consistent LBT failure on a direct communication interface or the terminal has consistent LBT failure on a target object of the direct communication interface; the target object is a frequency domain resource unit configured by the direct communication interface or in an activated state, and the frequency domain resource unit comprises one of a carrier wave, a BWP, a resource pool, a frequency sub-band and a radio resource block set;

And the sending module is used for sending a target object reconfiguration signaling to the terminal or notifying the terminal to release the direct communication interface connection.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program for causing the computer to execute the method described in the first aspect or the computer program for causing the computer to execute the method described in the second aspect.

In the embodiment of the application, in the process of executing LBT on the target object of the direct communication interface, if the consistent LBT fails on the target object, the terminal can execute the reselection of the target object or report the first indication information to the network equipment served by the terminal or determine the radio link failure of the direct link, and the network equipment issues the processing indication for the consistent LBT failure. Therefore, after the terminal fails in the consistent LBT on the target object of the direct communication interface, the embodiment of the application provides various optional processing mechanisms, and the system can work normally when the direct communication interface uses the shared spectrum, so as to improve the system performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an alternative communication scheme in accordance with an embodiment of the present application;

FIG. 2 is a schematic illustration of an alternative communication scheme in accordance with an embodiment of the present application;

FIG. 3 is a schematic diagram of an alternative application scenario according to an embodiment of the present application;

FIG. 4 is a flowchart illustrating a method for processing a consistent LBT failure according to an embodiment of the present application;

FIG. 5 is a schematic overall flow chart of a method for processing a consistent LBT failure of a terminal according to an embodiment of the present application;

FIG. 6 is a schematic overall flow chart of a method for processing a consistent LBT failure of a terminal according to an embodiment of the present application;

FIG. 7 is a schematic overall flow chart of a method for processing a consistent LBT failure of a terminal according to an embodiment of the present application;

FIG. 8 is a schematic overall flow chart of a method for processing a consistent LBT failure of a terminal according to an embodiment of the present application;

FIG. 9 is a flowchart of a method for processing a consistent LBT failure at a terminal side according to an embodiment of the present application;

FIG. 10 is a flowchart of a method for processing a consistent LBT failure at a network device side according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application;

FIG. 13 is a schematic diagram of a device for handling a consistent LBT failure according to an embodiment of the present application;

FIG. 14 is a schematic diagram of another apparatus for handling consistent LBT failures according to an embodiment of the present application.

Detailed Description

In the embodiment of the application, the term "and/or" describes the association relation of the association objects, which means that three relations can exist, for example, a and/or B can be expressed as follows: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in embodiments of the present application means two or more, and other adjectives are similar.

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The traditional wireless communication adopts a cellular network communication mode, namely, a terminal and network equipment transmit uplink and downlink data/control information through a Uu interface, as shown in fig. 1, the terminal accesses the network equipment through a cellular network, and can access core network equipment through the network equipment; and the terminal and the network equipment communicate by adopting a Uu interface, and uplink and downlink data/control information are transmitted through the Uu interface.

In addition, for adjacent terminals, data transmission can be performed in a short range through a direct communication link; as shown in fig. 2, data transmission between UE1 and UE2 may be via a direct communication link (also referred to as a sidlink or PC 5). The wireless interface to which the sidlink link corresponds is referred to as a direct communication interface (also referred to as a sidlink interface or PC5 interface).

As shown in fig. 3, an alternative application scenario of the embodiment of the present application, the wireless communication system includes a terminal 10 and a network device 11;

wherein the terminal 10 performs LBT on a target object of the direct communication interface; if it is determined that the consistent LBT failure occurs on the target object, the terminal 10 performs the reselection of the target object, or reports first indication information to the network device 11 serving the target object, or determines a direct Link (SL) radio Link failure (Radio Link Failure, RLF);

Wherein, the target object is a frequency domain resource unit configured or in an activated state of the direct communication interface; one frequency domain resource unit includes one of a carrier, a BWP, a resource pool, a frequency subband, and a set of radio resource blocks.

The first indication information is used for indicating that the terminal generates the consistent LBT failure on the direct communication interface or the terminal generates the consistent LBT failure on the target object of the direct communication interface.

The technical scheme provided by the embodiment of the application can be applied to various systems. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G NR, and the like. Terminals and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for the terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be operable to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), a home evolved base station (Home evolved Node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), etc., which are not limited in the embodiment of the present application. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

The terminal according to the embodiment of the application can be a device for providing voice and/or data connectivity for a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user equipment (user device), and embodiments of the present application are not limited in this respect.

Multiple-input Multiple-output (Multi Input Multi Output, MIMO) transmissions may each be made between a network device and a terminal device using one or more antennas, and the MIMO transmissions may be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of the root antenna combinations.

The flow chart of the method for processing the consistent LBT failure shown in fig. 4 specifically may include the following steps:

step S401, the terminal executes LBT on a target object of a direct communication interface;

wherein the target object is a frequency domain resource unit configured by the direct communication interface or in an active state, and the frequency domain resource unit comprises one of a carrier, a BWP, a resource pool, a frequency subband and a radio resource block set (Resource Block set, RB set);

step S402, the terminal determines that the consistent LBT failure occurs on the target object;

step S403, the terminal performs target object reselection;

step S404, the terminal reports first indication information to the network equipment serving the terminal;

Step S405, the terminal determines SL RLF.

The first indication information is used for indicating that the terminal has consistent LBT failure in the direct communication interface or the terminal has consistent LBT failure in the direct communication interface target object.

It should be noted that, step S403, step S404, and step S405 are different processing manners of the terminal after the terminal determines that the consistent LBT fails on the target object; step S403, step S404 and step S405 are three parallel implementations, and in practice, only step S403, only step S404 or only step S405 may be performed.

It should be noted that, the direct communication interface in the embodiment of the present application supports multiple frequency resource units, for example, the direct communication interface supports multiple carriers, multiple BWP, multiple resource pools, multiple frequency subbands, multiple radio resource block sets, and the like.

The target object of the direct communication interface in the embodiment of the application is shared spectrum, and the terminal executes LBT on the target object of the direct communication interface;

since the target object of the direct communication interface is a shared spectrum, in order to avoid collisions when different terminals use the shared spectrum, the terminals perform LBT on the target object.

LBT is performed by the terminal physical layer and if the terminal monitors that the channel is occupied, no data transmission is performed. If the physical layer of the terminal performs LBT before data transmission, the LBT procedure finds that the channel is occupied and cannot be transmitted, the physical layer indicates LBT failure to the medium access control (Medium Access Control, MAC) layer.

The MAC layer maintains a timer (LBT-failuredetection timer) and a COUNTER (lbt_counter) with an initial value of 0. The MAC layer restarts the timer every time it receives an LBT failure indication from the physical layer and the counter takes a value of +1. If the COUNTER LBT_COUNTER reaches a preset maximum value during the running of the timer LBT-FailureDetectionTimer, the MAC layer determines that a consistent LBT failure has occurred (consistent LBT failure).

The following describes different processing modes after determining that the consistent LBT fails on the target object by the terminal according to the embodiment of the present application:

and in the first mode, the terminal performs target object reselection.

An optional implementation manner is that the terminal determines a candidate object set corresponding to the direct communication interface, wherein the candidate object set comprises at least one candidate object; the terminal re-selects the direct communication interface target object from the candidate target object set.

Wherein each candidate object in the set of candidate objects satisfies some or all of the following conditions:

and (3) under condition 1, each candidate target object in the candidate target object set is a target object of a direct communication interface supported by the terminal capability.

And 2, the channel measurement result corresponding to each candidate target object in the candidate target object set is greater than or equal to a preset threshold.

It should be noted that the channel measurement result may be a channel busy ratio (Channel Busy Rate, CBR) measurement result, or the channel measurement result may be a channel occupancy (Channel Occupancy, CO);

different preset thresholds can be set according to different types of channel measurement results, for example, if the channel measurement result is CBR, the corresponding preset threshold can be a first threshold; if the CBR corresponding to the candidate target object is larger than a first threshold value, determining that the candidate target object meets the condition 2; if the channel measurement result is CO, the corresponding preset threshold may be a second threshold; and if the CO corresponding to the candidate target object is larger than the second threshold value, determining that the candidate target object meets the condition 2.

And 3, each candidate target object in the candidate target object set is a target object which is available to the network equipment accessed by the terminal and is used for the direct communication interface configured by the terminal.

Optionally, the candidate object in the candidate object set in the embodiment of the present application is a frequency domain resource unit, where the frequency domain resource unit includes one of a carrier, a BWP, a resource pool, a frequency subband, and a radio resource block set.

In the embodiment of the application, after the target object reselection is performed, if the target object reselected from the candidate target object set is a shared spectrum, an optional manner is that the terminal performs LBT on the reselected target object.

In implementation, if the terminal determines that the consistency LBT failure occurs in each candidate target object in the candidate target object set, the MAC layer of the terminal reports to a higher layer of the terminal that the consistency LBT failure occurs in the direct communication interface.

It should be noted that, in the embodiment of the present application, the higher layer of the terminal may be a radio resource control (Radio Resource Control, RRC) layer of the terminal.

After the terminal fails the consistency LBT on the direct communication interface, the higher layer of the terminal determines that SL RLF occurs.

After the terminal determines that SL RLF occurs, if the terminal is in an RRC connection state, the terminal reports a first message to network equipment serving the terminal; or if the terminal is in the RRC connected state and the terminal uses the resource allocation mode of the network scheduling, the terminal reports the first message to the network device serving the terminal.

The first message may be an RRC message or a MAC Control Element (CE).

The first message may be, for example, direct communication link termination information (sidlinkiueinformation).

In implementation, the first message needs to carry the second indication information;

the second indication information is used for indicating that the reason why the SL RLF occurs at the terminal is that the terminal fails the consistent LBT at the direct communication interface.

The overall flow of the processing method for the terminal to generate the consistent LBT failure in the embodiment of the present application is described in detail below with reference to a specific embodiment, as shown in fig. 5, and specifically may include the following steps:

step S501, the terminal performs LBT on the target object of the direct communication interface.

The target object specifically refers to a frequency domain resource unit, and the target object is a frequency domain resource unit configured by a current direct communication interface of the terminal or in an activated state; one frequency domain resource unit includes one of a carrier, a BWP, a resource pool, a frequency subband, and a set of radio resource blocks.

The terminal performs the LBT procedure on the target object as follows:

LBT is executed by the physical layer of the terminal, if the terminal monitors that the channel is occupied, data transmission is not carried out;

if the physical layer of the terminal performs LBT before data transmission, the LBT procedure finds that the channel is occupied and cannot be transmitted, the physical layer of the terminal indicates LBT failure to the MAC layer of the terminal.

Step S502, the terminal determines that the consistent LBT failure occurs on the target object;

in practice, the MAC layer of the terminal maintains a timer (LBT-failuredetection timer) and a COUNTER (lbt_counter), the initial value of which is 0; the MAC layer restarts the timer every time it receives an LBT failure indication from the physical layer and the counter takes a value of +1. If the COUNTER LBT_COUNTER reaches a preset maximum value during the running of the timer LBT-FailureDetectionTimer, the MAC layer determines that a consistent LBT failure has occurred.

Step S503, the terminal determines a candidate target object set corresponding to the direct communication interface;

wherein the candidate object target set comprises at least one candidate object.

Each candidate object in the set of candidate objects satisfies some or all of the following conditions:

Step S504, the terminal executes target object reselection in the candidate target object set.

In the implementation, if the terminal determines that the consistent LBT fails on the current target object, the terminal triggers the reselection of the target object; the specific operation of the target object reselection is as follows:

the terminal performs a target object reselection within the candidate target object set.

Optionally, if the target object selected from the candidate target object set is the shared spectrum after the terminal performs the target object reselection, the terminal may further perform LBT on the direct communication interface target object after the reselection.

In step S505, if the terminal fails to agree with LBT on all candidate objects in the candidate object set of the direct communication interface, the MAC layer of the terminal needs to report the failure of the direct communication interface to its higher layer.

In step S506, if the higher layer of the terminal receives the failure of the direct communication interface consistency LBT reported by the MAC layer, the terminal determines that the SL RLF occurs.

Step S507, the terminal sends a first message to the network equipment serving the terminal;

in the implementation, if the terminal is in an RRC connection state, the terminal reports a first message to the network equipment; or when the terminal is in the RRC connection state and the terminal uses the resource allocation mode of the network scheduling, the terminal reports the first message to the network equipment.

Optionally, the first message needs to carry second indication information, where the second indication information is used to indicate that the reason why the SL RLF occurs in the terminal is that the terminal fails to perform consistent LBT on the direct communication interface.

And secondly, the terminal reports the first indication information to the network equipment serving the terminal.

In the mode, after determining that the consistency LBT fails on the target object, the terminal reports first indication information to network equipment serving the target object;

optionally, after determining that the consistent LBT fails on the target object, the terminal reports the first indication information to the network device serving the terminal when any one of the following conditions is satisfied:

the method comprises the following steps that 1, a terminal is in an RRC connection state;

condition 2, the terminal is in RRC connected state and the terminal uses the resource allocation mode of network scheduling.

The first indication information is used for indicating that the terminal has consistent LBT failure on the direct communication interface or the terminal has consistent LBT failure on the target object of the direct communication interface.

Optionally, the terminal may report the first indication information to the network device serving the terminal through the Uu interface.

In the implementation, a terminal reports first indication information to network equipment in an RRC signaling or MAC CE mode;

The RRC signaling or the MAC CE at least comprises identification information of a target object and/or link identification of a direct communication interface;

direct communication interface destination address, direct communication interface source address, type of transmission (cast type).

For example, the link identification of the direct communication interface may be a direct communication interface destination address, or the link identification of the direct communication interface may be a combination of a direct communication interface destination address and cast type, or the link identification of the direct communication interface may be a combination of a direct communication interface source address and destination address, or the link identification of the direct communication interface may be a combination of a direct communication interface source address, destination address, and cast type.

After receiving the first indication information reported by the terminal, the network equipment determines that the terminal fails in the consistent LBT on the target object of the direct communication interface or fails in the consistent LBT on the direct communication interface, and then sends a target object reconfiguration signaling to the terminal or notifies the terminal to release the direct communication interface connection.

In implementation, after receiving the first indication information reported by the terminal, the network device may adopt two different processing modes;

1. The network equipment sends a target object reconfiguration signaling to the terminal;

after receiving the first indication information reported by the terminal, the network equipment reconfigures the target object for the terminal and transmits a target object reconfiguration signaling to the terminal;

it should be noted that, the target object reconfigured by the network device for the terminal is a carrier or BWP.

Correspondingly, after receiving the target object reconfiguration signaling issued by the network device, the terminal uses the target object reconfigured by the network device, or sets the target object reconfigured by the network device to be in an active state.

Optionally, if the target object reconfigured by the network device is the shared spectrum, performing LBT on the target object reconfigured by the terminal.

The overall flow of the processing method for the terminal to generate the consistent LBT failure in the embodiment of the present application is described in detail below with reference to a specific embodiment, as shown in fig. 6, and may specifically include the following steps:

step S601, the terminal performs LBT on a target object of the direct communication interface.

The terminal performs the LBT procedure on the target object as follows:

Step S602, the terminal determines that consistent LBT failure occurs on a target object;

Step S603, the terminal reports first indication information to the network equipment serving the terminal;

if the current target object of the terminal direct communication interface has consistency LBT failure, triggering the terminal to report the consistency LBT failure on the target object to the network equipment through the Uu interface; the indication information reporting may specifically be performed by RRC signaling or MAC CE.

The RRC signaling or MAC CE includes at least one of the following information:

identification information of a target object in which the consistency LBT fails;

direct communication interface link identification with consistent LBT failure;

the direct communication interface link identification includes some or all of the following information:

In step S604, the network device determines that the terminal has failed in consistent LBT on the target object of the direct communication interface or has failed in consistent LBT on the direct communication interface.

Step S605, the network device sends a target object reconfiguration signaling to the terminal.

2. The network equipment informs the terminal to release the direct communication interface connection;

After the network equipment receives the first indication information reported by the terminal, the network equipment determines that the terminal has consistent LBT failure on a target object of the direct communication interface or the direct communication interface has consistent LBT failure, and then the network equipment notifies the terminal to release the direct communication interface connection.

It should be noted that the direct communication interface through which the network device notifies the terminal of release includes a PC5-S connection and/or a PC5-RRC connection.

The overall flow of the processing method for the terminal to generate the consistent LBT failure in the embodiment of the present application is described in detail below with reference to a specific embodiment, as shown in fig. 7, and may specifically include the following steps:

step S701, the terminal performs LBT on a target object of the direct communication interface.

The target object specifically refers to a carrier or BWP of a direct communication interface, and the target object is a carrier or BWP of an active state or being used by the terminal.

The terminal performs the LBT procedure on the target object as follows:

Step S702, the terminal determines that consistent LBT failure occurs on a target object;

Step 703, the terminal reports first indication information to the network device serving the terminal;

The RRC signaling or MAC CE includes at least one of the following information:

direct communication interface link identification with consistent LBT failure;

In step S704, the network device determines that the terminal has failed in consistent LBT on the target object of the direct communication interface or has failed in consistent LBT on the direct communication interface.

Step S705, the network device notifies the terminal to release the direct communication interface connection.

In addition, for the second mode, after the terminal determines that the consistent LBT failure occurs on the target object and reports the first indication information to the network device serving the terminal, in an optional implementation manner, the terminal may reselect the target object;

in practice, if the terminal currently has other available target objects in addition to the target object for which the consistent LBT failure currently occurs, the terminal determines a set of direct communication interface candidate target objects, and then performs a target object reselection within the set of candidate target objects.

If the terminal re-selects the target object to be re-subjected to the consistent LBT failure, the steps S701 to S704 are continued until the terminal re-selects the target object which can work normally or all candidate target objects are subjected to the consistent LBT failure.

And thirdly, determining that SL RLF occurs by the terminal.

An alternative embodiment is that the terminal determines that SL RLF has occurred after determining that consistent LBT has failed on the target object.

Illustratively, if the terminal has only one target object on the direct communication interface, the SL RLF is determined to occur after the terminal determines that the consistent LBT failure occurs on the target object.

The first message may be an RRC message or a MAC CE.

The first message may be, for example, a sidlinkiueinformation.

The overall flow of the method for processing the consistent LBT failure of the terminal in the embodiment of the present application is described in detail below with reference to a specific embodiment, as shown in fig. 8, and may specifically include the following steps:

Step S801, the terminal performs LBT on a target object of the direct communication interface.

The terminal performs the LBT procedure on the target object as follows:

Step S802, the terminal determines that the consistent LBT failure occurs on the target object;

In step S803, if the terminal has only one target object on the direct communication interface, the terminal determines that SL RLF has occurred.

Step S804, the terminal sends a first message to the network equipment serving the terminal;

Based on the same inventive concept, the embodiment of the present application provides a method for processing a consistent LBT failure at a terminal side, and the implementation of the method can be referred to the implementation at the terminal side above; as shown in fig. 9, a flowchart of a method for processing a consistent LBT failure at a terminal side in an embodiment of the present application specifically may include the following steps:

step S901, the terminal executes LBT on a target object of the direct communication interface; wherein the target object is a frequency domain resource unit configured by the direct communication interface or in an active state, and the frequency domain resource unit comprises one of a carrier, a BWP, a resource pool, a frequency subband and a radio resource block set;

Step S902, if it is determined that the consistent LBT fails on the target object, the terminal performs target object reselection, or reports first indication information to network equipment serving the target object, or determines SL RLF; the first indication information is used for indicating that the terminal fails to perform consistent LBT on the direct communication interface or that the terminal fails to perform consistent LBT on the target object on the direct communication interface.

Optionally, the method further comprises:

Based on the same inventive concept, the embodiment of the present application provides a method for processing a consistent LBT failure at a network device side, and the implementation of the method can be referred to the implementation at the network device side above; as shown in fig. 10, a flowchart of a method for processing a consistent LBT failure at a network device side according to an embodiment of the present application may specifically include the following steps:

step S1001, a network device receives first indication information reported by a terminal, wherein the first indication information is used for indicating that the terminal has consistent LBT failure on a direct communication interface or that the terminal has consistent LBT failure on a target object of the direct communication interface; the target object is a frequency domain resource unit configured by the direct communication interface or in an activated state, and the frequency domain resource unit comprises one of a carrier wave, a BWP, a resource pool, a frequency sub-band and a radio resource block set;

Step S1002, the network device sends a target object reconfiguration signaling to the terminal, or notifies the terminal to release the direct communication interface connection.

Optionally, the method further comprises:

and the first message is reported to the network equipment after the terminal determines that the through link radio link failure SL RLF occurs.

As shown in fig. 11, an embodiment of the present application provides a terminal including a memory 1101, a processor 1102, and a transceiver 1103;

the memory 1101 is used for storing a computer program;

the transceiver 1103 is configured to send and receive data under the control of the processor 1102;

the processor 1102 is configured to read the computer program in the memory 1101 and perform the following operations:

Optionally, the processor 1102 is specifically configured to:

Optionally, after performing the target object reselection, the processor 1102 is further configured to:

Optionally, the processor 1102 is further configured to:

Optionally, after determining that SL RLF occurs, the processor 1102 is further configured to:

Optionally, the processor 1102 is specifically configured to:

Optionally, after reporting the first indication information to the network device, the processor 1102 is further configured to:

Where in FIG. 11, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 1102 and various circuits of memory represented by the memory 1101, are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1103 may be a number of elements, i.e. comprising a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, etc. The user interface 1104 may also be an interface capable of interfacing with an inscribed desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1102 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1102 in performing the operations.

Alternatively, the processor 1102 may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field-programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), which may also employ a multi-core architecture.

The processor is configured to execute any of the methods provided by the embodiments of the present application on the terminal side according to the obtained executable instructions by calling a computer program stored in the memory. The processor and the memory may also be physically separate.

As shown in fig. 12, an embodiment of the present application provides a network device including a memory 1201, a processor 1202, and a transceiver 1203;

the memory 1201 is used for storing a computer program;

the transceiver 1203 is configured to receive and transmit data under the control of the processor 1202;

the processor 1202 is configured to read the computer program in the memory 1201 and perform the following operations:

Optionally, the processor 1202 is further configured to:

Where in FIG. 12, a bus architecture may be comprised of any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 1202 and various circuits of memory represented by the memory 1201. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1203 may be a number of elements, i.e. include a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The processor 1202 is responsible for managing the bus architecture and general processing, and the memory 1201 may store data used by the processor 1202 in performing operations.

Alternatively, the processor 1202 may be a CPU, ASIC, FPGA or CPLD, and the processor may also employ a multi-core architecture.

The processor is used for executing the method of any network equipment side provided by the embodiment of the application according to the obtained executable instructions by calling the computer program stored in the memory. The processor and the memory may also be physically separate.

As shown in fig. 13, in an embodiment of the present application, a processing apparatus for consistent LBT failure, the apparatus includes:

an execution module 1301 for executing LBT on a target object of the direct communication interface; wherein the target object is a frequency domain resource unit configured by the direct communication interface or in an active state, and the frequency domain resource unit comprises one of a carrier, a BWP, a resource pool, a frequency subband and a radio resource block set;

a processing module 1302, configured to execute reselection of the target object if it is determined that a consistent LBT failure occurs on the target object, or report first indication information to a network device serving the target object, or determine SL RLF; the first indication information is used for indicating that the terminal fails to perform consistent LBT on the direct communication interface or that the terminal fails to perform consistent LBT on the target object on the direct communication interface.

Optionally, the processing module 1302 is specifically configured to:

Optionally, after performing the target object reselection, the processing module 1302 is further configured to:

Optionally, the processing module 1302 is further configured to:

Optionally, after determining that SL RLF has occurred, the processing module 1302 is further configured to:

Optionally, the processing module 1302 is specifically configured to:

Optionally, after reporting the first indication information to the network device, the processing module 1302 is further configured to:

As shown in fig. 14, in an embodiment of the present application, a processing apparatus for consistent LBT failure includes:

a receiving module 1401, configured to receive first indication information reported by a terminal, where the first indication information is used to indicate that the terminal has a consistent LBT failure on a direct communication interface or that the terminal has a consistent LBT failure on a target object of the direct communication interface; the target object is a frequency domain resource unit configured by the direct communication interface or in an activated state, and the frequency domain resource unit comprises one of a carrier wave, a BWP, a resource pool, a frequency sub-band and a radio resource block set;

A sending module 1402, configured to send a target object reconfiguration signaling to the terminal, or notify the terminal to release the direct communication interface connection.

Optionally, the receiving module 1401 is further configured to:

It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.

The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In addition, an embodiment of the present application further provides a computer readable storage medium storing a computer program for causing the computer to execute any one of the above-mentioned methods for processing a consistent LBT failure.

The computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), etc.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

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

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A method for handling a consistent LBT failure, the method comprising:

the terminal monitors LBT before executing dialogue on the target object of the direct communication interface; wherein the target object is a frequency domain resource unit configured by the direct communication interface or in an active state, and the frequency domain resource unit comprises one of a carrier, a BWP, a resource pool, a frequency subband and a radio resource block set;

if the consistency LBT failure occurs on the target object, the terminal executes the reselection of the target object, or reports first indication information to network equipment serving the target object, or determines that the direct link radio link fails SL RLF; the first indication information is used for indicating that the terminal fails to perform consistent LBT on the direct communication interface or that the terminal fails to perform consistent LBT on the target object on the direct communication interface.

2. The method of claim 1, wherein the terminal performs the target object reselection, specifically comprising:

3. The method of claim 2, wherein each candidate object in the set of candidate objects satisfies some or all of the following conditions:

4. The method of claim 2, wherein after the terminal performs the target object reselection, the method further comprises:

5. The method of claim 2, wherein after the terminal performs the target object reselection, the method further comprises:

If the terminal determines that the consistency LBT fails in each candidate target object in the candidate target object set, the Media Access Control (MAC) layer of the terminal reports the consistency LBT failure of the terminal in the direct communication interface to a higher layer of the terminal.

6. The method of claim 5, wherein the method further comprises:

7. The method of claim 1 or 6, wherein after the terminal determines that SL RLF has occurred, the method further comprises:

if the terminal is in a Radio Resource Control (RRC) connection state, the terminal reports a first message to network equipment serving the terminal; the first message is an RRC message or a MAC control element CE.

8. The method of claim 7, wherein if the terminal is in a radio resource control, RRC, connected state, the terminal reports a first message to a network device serving the terminal, comprising:

9. The method of claim 7, wherein the first message needs to carry second indication information, where the second indication information is used to indicate that a terminal has a SL RLF because the terminal has a consistent LBT failure on the direct communication interface.

10. The method of claim 1, wherein the terminal reporting the first indication information to a network device serving the terminal comprises:

11. The method of claim 1, wherein the terminal reports the first indication information to a network device serving the terminal, specifically comprising:

the terminal reports first indication information to the network equipment in a mode of Radio Resource Control (RRC) signaling or media access control (MAC CE);

Direct communication interface destination address, direct communication interface source address, type of transmission cast type.

12. The method of claim 1, wherein after the terminal reports the first indication information to the network device, the method further comprises:

the terminal receives a target object reconfiguration signaling sent by the network equipment; or (b)

And the terminal receives a direct communication interface connection release notification message issued by the network equipment.

13. A method for handling a consistent LBT failure, the method comprising:

14. The method of claim 13, wherein the method further comprises:

15. The method of claim 14, wherein the first message needs to carry second indication information, where the second indication information is used to indicate that a terminal has a SL RLF because the terminal has a consistent LBT failure on the direct communication interface.

16. A terminal comprising a memory, a processor, and a transceiver;

the memory is used for storing a computer program;

monitoring LBT before performing a session on a target object of the direct communication interface; wherein the target object is a frequency domain resource unit configured by the direct communication interface or in an active state, and the frequency domain resource unit comprises one of a carrier, a BWP, a resource pool, a frequency subband and a radio resource block set;

If the consistency LBT failure occurs on the target object, the target object reselection is executed, or first indication information is reported to network equipment serving the target object, or the through link radio link failure SL RLF is determined; the first indication information is used for indicating that the terminal fails to perform consistent LBT on the direct communication interface or that the terminal fails to perform consistent LBT on the target object on the direct communication interface.

17. The terminal of claim 16, wherein the processor is configured to:

18. The terminal of claim 17, wherein each candidate object in the set of candidate objects satisfies some or all of the following conditions:

19. The terminal of claim 17, wherein after performing the target object reselection, the processor is further configured to:

20. The terminal of claim 17, wherein after performing the target object reselection, the processor is further configured to:

21. The terminal of claim 20, wherein the processor is further configured to:

22. The terminal of claim 16 or 21, wherein after determining that SL RLF has occurred, the processor is further configured to:

If the terminal is in a Radio Resource Control (RRC) connection state, reporting a first message to network equipment serving the terminal; the first message is an RRC message or a MAC CE.

23. The terminal of claim 22, wherein the processor is specifically configured to:

24. The terminal of claim 22, wherein the first message needs to carry second indication information, where the second indication information is used to indicate that a cause of SL RLF occurs for the terminal that the terminal fails a consistent LBT on the direct communication interface.

25. The terminal of claim 16, wherein the processor is configured to:

26. The terminal of claim 16, wherein the processor is configured to:

27. The terminal of claim 16, wherein after reporting the first indication information to the network device, the processor is further configured to:

28. A network device comprising a memory, a processor, and a transceiver;

the memory is used for storing a computer program;

29. The network device of claim 28, wherein the processor is further configured to:

30. The network device of claim 29,

the first message needs to carry second indication information, and the second indication information is used for indicating that the reason that the terminal generates SL RLF is that the terminal generates consistent LBT failure on the direct communication interface.

31. A device for handling a consistent LBT failure, the device comprising:

an execution module for monitoring LBT before executing a session on a target object of the direct communication interface; wherein the target object is a frequency domain resource unit configured by the direct communication interface or in an active state, and the frequency domain resource unit comprises one of a carrier, a BWP, a resource pool, a frequency subband and a radio resource block set;

32. A device for handling a consistent LBT failure, the device comprising:

33. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for causing the computer to perform the method of any one of claims 1 to 12 or for causing the computer to perform the method of any one of claims 13 to 15.