CN117643162A

CN117643162A - Beam failure recovery method and device and terminal equipment

Info

Publication number: CN117643162A
Application number: CN202180100425.8A
Authority: CN
Inventors: 尤心
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2024-03-01
Also published as: WO2023065213A1

Abstract

The embodiment of the application provides a beam failure recovery method and device and terminal equipment, wherein the method comprises the following steps: the terminal device determines whether a beam failure has occurred in a first cell and/or determines whether to trigger a beam failure recovery procedure for the first cell based on whether at least some of a plurality of TRPs are triggering the beam failure recovery procedure, wherein the plurality of TRPs are TRPs for the first cell.

Description

Beam failure recovery method and device and terminal equipment

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to a beam failure recovery method and device and terminal equipment.

Background

For a cell, if a Beam Failure (Beam Failure) occurs in the cell, a Beam Failure recovery (Beam Failure Recovery, BFR) procedure for the cell is triggered. As the standard evolves, there may be multiple transmission and reception points (Transmit Receive Point, TRP) for one cell, beam failure may occur for each individual TRP, for which case it is clear how to trigger the beam failure recovery procedure of the cell.

Disclosure of Invention

The embodiment of the application provides a beam failure recovery method and device, terminal equipment, a chip, a computer readable storage medium, a computer program product and a computer program.

The beam failure recovery method provided by the embodiment of the application comprises the following steps:

the terminal device determines whether a beam failure has occurred in a first cell and/or determines whether to trigger a beam failure recovery procedure for the first cell based on whether at least some of a plurality of TRPs are triggering the beam failure recovery procedure, wherein the plurality of TRPs are TRPs for the first cell.

The beam failure recovery device provided by the embodiment of the application is applied to terminal equipment, and the device comprises:

a determining unit, configured to determine whether a beam failure occurs in a first cell and/or determine whether to trigger a beam failure recovery procedure of the first cell based on whether at least some of a plurality of TRPs trigger the beam failure recovery procedure, where the plurality of TRPs are TRPs of the first cell.

The terminal equipment provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the beam failure recovery method.

The chip provided by the embodiment of the application is used for realizing the beam failure recovery method.

Specifically, the chip includes: and a processor for calling and running the computer program from the memory, so that the device provided with the chip executes the beam failure recovery method.

The computer readable storage medium provided in the embodiments of the present application is configured to store a computer program, where the computer program causes a computer to execute the beam failure recovery method described above.

The computer program product provided by the embodiment of the application comprises computer program instructions, wherein the computer program instructions enable a computer to execute the beam failure recovery method.

The computer program provided in the embodiments of the present application, when executed on a computer, causes the computer to execute the beam failure recovery method described above.

According to the technical scheme, the terminal equipment determines whether the beam failure occurs in the first cell and/or determines whether the beam failure recovery flow of the first cell is triggered or not based on whether at least part of TRPs in the plurality of TRPs trigger the beam failure recovery flow, so that for the case that the first cell has the plurality of TRPs, how to judge whether the beam failure occurs in the first cell and/or how to judge whether to trigger the beam failure recovery flow of the first cell is clear, and the first cell recovers from the beam failure as soon as possible.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present application;

FIG. 2 is a schematic diagram I of a MAC CE for BFR provided by an embodiment of the present application;

FIG. 3 is a schematic diagram II of a MAC CE for BFR provided by an embodiment of the present application;

fig. 4 is a flow chart of a beam failure recovery method provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a beam failure recovery apparatus according to an embodiment of the present application;

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

FIG. 7 is a schematic block diagram of a chip of an embodiment of the present application;

fig. 8 is a schematic block diagram of a communication system provided in an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present application.

As shown in fig. 1, communication system 100 may include a terminal device 110 and a network device 120. Network device 120 may communicate with terminal device 110 over the air interface. Multi-service transmission is supported between terminal device 110 and network device 120.

It should be understood that the present embodiments are illustrated by way of example only with respect to communication system 100, but the present embodiments are not limited thereto. That is, the technical solution of the embodiment of the present application may be applied to various communication systems, for example: long term evolution (Long Term Evolution, LTE) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), internet of things (Internet of Things, ioT) systems, narrowband internet of things (Narrow Band Internet of Things, NB-IoT) systems, enhanced Machine-type-Type Communications (eMTC) systems, 5G communication systems (also known as New Radio (NR) communication systems), or future communication systems, etc.

In the communication system 100 shown in fig. 1, the network device 120 may be an access network device in communication with the terminal device 110. The access network device may provide communication coverage for a particular geographic area and may communicate with terminal devices 110 (e.g., UEs) located within the coverage area.

The network device 120 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in a long term evolution (Long Term Evolution, LTE) system, or a next generation radio access network (Next Generation Radio Access Network, NG RAN) device, or a base station (gNB) in a NR system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device 120 may be a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

Terminal device 110 may be any terminal device including, but not limited to, a terminal device that employs a wired or wireless connection with network device 120 or other terminal devices.

For example, the terminal device 110 may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, an IoT device, a satellite handset, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handset with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolution network, etc.

The terminal Device 110 may be used for Device-to-Device (D2D) communication.

The wireless communication system 100 may further comprise a core network device 130 in communication with the base station, which core network device 130 may be a 5G core,5gc device, e.g. an access and mobility management function (Access and Mobility Management Function, AMF), further e.g. an authentication server function (Authentication Server Function, AUSF), further e.g. a user plane function (User Plane Function, UPF), further e.g. a session management function (Session Management Function, SMF). Optionally, the core network device 130 may also be a packet core evolution (Evolved Packet Core, EPC) device of the LTE network, for example a session management function+a data gateway (Session Management Function + Core Packet Gateway, smf+pgw-C) device of the core network. It should be appreciated that SMF+PGW-C may perform the functions performed by both SMF and PGW-C. In the network evolution process, the core network device may also call other names, or form a new network entity by dividing the functions of the core network, which is not limited in this embodiment of the present application.

Communication may also be achieved by establishing connections between various functional units in the communication system 100 through a next generation Network (NG) interface.

For example, the terminal device establishes an air interface connection with the access network device through an NR interface, and is used for transmitting user plane data and control plane signaling; the terminal equipment can establish control plane signaling connection with AMF through NG interface 1 (N1 for short); an access network device, such as a next generation radio access base station (gNB), can establish a user plane data connection with a UPF through an NG interface 3 (N3 for short); the access network equipment can establish control plane signaling connection with the AMF through an NG interface 2 (N2 for short); the UPF can establish control plane signaling connection with the SMF through an NG interface 4 (N4 for short); the UPF can interact user plane data with the data network through an NG interface 6 (N6 for short); the AMF may establish a control plane signaling connection with the SMF through NG interface 11 (N11 for short); the SMF may establish a control plane signaling connection with the PCF via NG interface 7 (N7 for short).

Fig. 1 exemplarily illustrates one base station, one core network device, and two terminal devices, alternatively, the wireless communication system 100 may include a plurality of base station devices and each base station may include other number of terminal devices within a coverage area, which is not limited in the embodiment of the present application.

It should be noted that fig. 1 illustrates, by way of example, a system to which the present application is applicable, and of course, the method shown in the embodiment of the present application may be applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. It should also be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication that there is an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. It should also be understood that, in the embodiments of the present application, reference to "corresponding" may mean that there is a direct correspondence or an indirect correspondence between the two, or may mean that there is an association between the two, or may be a relationship between an instruction and an indicated, configured, or the like. It should also be understood that "predefined" or "predefined rules" mentioned in the embodiments of the present application may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (e.g., including terminal devices and network devices), and the present application is not limited to a specific implementation thereof. Such as predefined may refer to what is defined in the protocol. It should also be understood that, in the embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied in future communication systems, which are not limited in this application.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following description is given of related technologies of the embodiments of the present application, and the following related technologies may be optionally combined with the technical solutions of the embodiments of the present application as an alternative, which all belong to the protection scope of the embodiments of the present application.

BFR of Special Cell (SpCell)

The Primary Cell (PCell) is a Primary Cell on the Primary Cell group (Master Cell Group, MCG) side, and the Primary secondary Cell (Primary Secondary Cell, PSCell) is a Primary Cell on the secondary Cell group (Secondary Cell Group, SCG) side. PCell and PSCell are collectively referred to as SpCell.

For SpCell, its BFR is defined by standardization. Specifically, when the SpCell fails, a beam failure recovery procedure of the SpCell is triggered, where the beam failure recovery procedure of the SpCell may be implemented by the following procedures: the terminal device tells the base station which downlink beam to use for transmitting the random access response (Random Access Response, RAR) by means of random access, thereby recovering the downlink beam. Specifically, in the random access procedure, the terminal device transmits a random access preamble (random access preamble) to the base station, where the random access preamble is configured according to a synchronization signal block (SS/PBCH, SSB), and the terminal device selects a random access preamble to be transmitted in the following manner: the terminal device measures the Signal quality of the SSB (e.g. Reference Signal received power (Reference Signal Received Power, RSRP)), selects the SSB satisfying a threshold (the SSB has an association with a channel state information-Reference Signal (CSI-RS)) according to the Signal quality of the SSB, selects a random access preamble corresponding to the SSB, and further selects a physical random access channel (Physical Random Access Channel, PRACH) resource corresponding to the random access preamble. After the terminal equipment selects the random access preamble and the PRACH resource, the terminal equipment sends the selected random access preamble on the selected PRACH resource; after receiving the random access preamble, the base station can determine which SSB-associated downlink beam to use for feeding back the RAR according to the received random access preamble or PRACH resource where the random access preamble is located.

The following describes the main steps in the beam failure recovery procedure of the SpCell:

1. beam failure detection (Beam failure detection).

The physical layer of the terminal device monitors whether the quality of the physical downlink control channel (Physical Downlink Control Channel, PDCCH) meets a predetermined/configured threshold, which may refer to, for example, the PDCCH having a hypothetical block error rate (Hypothetical BLER) value less than or equal to the predetermined/configured threshold. Here, the physical layer of the terminal device monitors the quality of the PDCCH by: the physical layer of the terminal device measures the signal quality of the reference signal (such as CSI-RS and/or SSB) corresponding to the PDCCH, and if the signal quality of the reference signal meets the predetermined/configured threshold, the quality of the PDCCH corresponding to the reference signal is considered to meet the predetermined/configured threshold.

If the physical layer of the terminal device monitors that the quality of the PDCCH does not meet the predetermined/configured threshold, the physical layer of the terminal device reports a beam failure event to the MAC layer of the terminal device (beam failure instance). For a MAC entity, whenever the physical layer reports a beam failure event, it will increment 1 for the COUNTER bfi_counter and restart the timer beamfailuredetection timer; if the value of the COUNTER bfi_counter reaches a maximum value during the running period of the timer beamfailuredetection timer, the terminal device considers that the beam failure occurs, and triggers a beam failure recovery procedure, where for the SpCell, the triggered beam failure recovery procedure is the triggered random access procedure.

2. Selection of a new candidate beam (New candidate beam).

The terminal device measures the signal quality of reference signals (e.g., CSI-RS and/or SSB), and selects a reference signal satisfying a predetermined/configured threshold based on the signal quality of the reference signal. Here, since the reference signal has an association relationship with the beam, "selecting the reference signal satisfying the predetermined/configuration threshold" can also be understood as "selecting a new candidate beam satisfying the condition".

Here, if the terminal device does not select a new candidate beam satisfying the condition, the terminal device adopts a contention-based random access (content-based random access) procedure.

3. Beam failure recovery request.

The terminal device initiates a beam failure recovery request to the base station, specifically, the terminal device may initiate a beam failure recovery request to the base station by:

mode one: the terminal equipment selects a random access preamble corresponding to the new candidate wave beam and PRACH resources to initiate random access, and the base station can determine the new candidate wave beam according to the random access preamble or the PRACH resources.

Mode two: the terminal device reports its selected new candidate beam to the base station via a physical uplink control channel (Physical Uplink Control Channel, PUCCH).

4. The terminal device monitors the response to the beam failure recovery request.

If the terminal equipment monitors feedback information or newly transmitted scheduling information which is sent by the base station and aims at the beam failure recovery request, the terminal equipment considers that the beam failure recovery is successfully completed; if the terminal equipment does not monitor the feedback information or the newly transmitted scheduling information sent by the base station and aiming at the beam failure recovery request, the terminal equipment considers that the beam failure recovery is not completed successfully.

BFR of Secondary Cell (SCell)

Both the secondary cell on the MCG side and the secondary cell on the SCG side are referred to as scells. For SCell, its BFR is defined by standardization. Specifically, when the SCell fails, triggering a beam failure recovery procedure of the SCell, where the beam failure recovery procedure of the SCell may be implemented by the following procedures: the terminal device informs the base station SCell that a beam failure has occurred through a medium access Control (Media Access Control, MAC) Control Element (CE).

The types of MAC CEs used for beam failure recovery are BFR MAC CE, truncated BFR MAC CE (Truncated BFR MAC CE). Wherein the BFR MAC CE and the truncated BFR MAC CE have variable sizes. For convenience of description, the BFR MAC CE and the truncated BFR MAC CE will be hereinafter simply referred to as MAC CE. The MAC CE includes a bitmap (bitmap) and N pieces of beam failure recovery information (beam failure recovery information), N being an integer of 0 or more. As shown in fig. 2, the bit map in the MAC CE is C _i A field, occupying 1 byte (ottet); each beam failure recovery information in the MAC CE includes an AC field, an R field, and a Candidate RS ID or R bits field, and occupies 1 byte. As shown in fig. 3, the bit map in the MAC CE is C _i A field occupying 4 bytes; each beam failure recovery information in the MAC CE includes an AC field, an R field, and a bridge RS ID field, and occupies 1 byte. The respective information fields in the MAC CE are explained below.

SP: the information field is used to indicate beam failure detection of the SpCell. BFR MAC CE or Truncated BFR MAC CE is carried in MAC PDU, and the MAC PDU is sent to the base station in the random access flow, in this case, the value of SP domain is 1, used for indicating that SpCell has beam failure; otherwise, the SP domain takes a value of 1.

C _i (BFR MAC CE): the information field is used to indicate beam failure detection for scells with serving cell index (ServCellIndex) i. C (C) _i A field value of 1 indicates that beam failure of SCell with ServCellIndex of i is detected and evaluation of candidate beams has been completed, and beam failure recovery information (i.e., bytes containing AC field) corresponding to SCell with ServCellIndex of i is present. C (C) _i A field value of 0 indicates that the beam failure of the SCell with ServCellIndex of i is not detected or the beam failure of the SCell with ServCellIndex of i is detected but the evaluation of the candidate beam has not been completed, and beam failure recovery information (i.e., bytes including the AC field) corresponding to the SCell with ServCellIndex of i is not present.

C _i (Truncated BFR MAC CE): the information field is used to indicate beam failure detection for scells with serving cell index (ServCellIndex) i. C (C) _i A field value of 1 indicates that a beam failure of the SCell with ServCellIndex of i is detected and evaluation of candidate beams has been completed, and beam failure recovery information (i.e., bytes containing an AC field) corresponding to the SCell with ServCellIndex of i may exist. C (C) _i A field value of 0 indicates that the beam failure of the SCell with ServCellIndex of i is not detected or the beam failure of the SCell with ServCellIndex of i is detected but the evaluation of the candidate beam has not been completed, and beam failure recovery information (i.e., bytes including the AC field) corresponding to the SCell with ServCellIndex of i is not present.

It should be noted that the number of beam failure recovery information (i.e., bytes containing AC field) in Truncated BFR MAC CE is likely to be 0.

AC: the information field is located in beam failure recovery information (the beam failure recovery information occupies one byte), and the AC field is used to indicate whether there is an available beam, and to indicate whether a Candidate reference signal identification (Candidate RS ID) field exists in the byte in which the AC field exists. Wherein, if the signal quality of at least one SSB in the list candidatebeam rsscelllist satisfies the threshold (for example, the SS-RSRP of at least one SSB is greater than or equal to the threshold RSRP-threshold bfr) or the signal quality of at least one CSI-RS in the list candidatebeam rsscelllist satisfies the threshold (for example, the CSI-RSRP of at least one CSI-RS is greater than or equal to the threshold RSRP-threshold bfr), the value of the AC domain is 1; otherwise, the AC field takes a value of 0. Further, if the value of the AC domain is 1, whether the Candidate RS ID domain exists in the byte where the AC domain is located; if the value of the AC field is 0, the byte in which the AC field is located does not have the Candidate RS ID field, but is replaced with R bits.

Candidate RS ID: the information field is located in beam failure recovery information (the beam failure recovery information occupies one byte), and the Candidate RS ID field is used to indicate the beam identity of the available beam. Specifically, the Candidate RS ID field carries an index of SSB or CSI-RSRP whose number quality meets a threshold.

R: reserved bits, default to 0.

Based on the above scheme, if a cell fails, a beam failure recovery procedure for the cell is triggered. As standards evolve, a cell may have multiple TRPs, for each individual TRP beam failure may occur, for which case it needs to be clear how to trigger the cell's beam failure recovery procedure. For this reason, the following technical solutions of the embodiments of the present application are proposed.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies may be optionally combined with the technical solutions of the embodiments of the present application, which all belong to the protection scope of the embodiments of the present application. Embodiments of the present application include at least some of the following.

Fig. 4 is a flow chart of a beam failure recovery method provided in an embodiment of the present application, as shown in fig. 4, where the beam failure recovery method includes the following steps:

step 401: the terminal device determines whether a beam failure has occurred in a first cell and/or determines whether to trigger a beam failure recovery procedure for the first cell based on whether at least some of a plurality of TRPs are triggering the beam failure recovery procedure, wherein the plurality of TRPs are TRPs for the first cell.

In the embodiment of the present application, the first cell has a plurality of TRPs, and beam failure may occur for each independent TRP. For ease of description, any one TRP in the first cell is referred to as a target TRP, and in some alternative embodiments, it may be determined whether a beam failure has occurred by:

the physical layer of the terminal equipment detects that the signal quality of a target TRP does not meet a specified threshold, and reports a beam failure event to the MAC layer of the terminal equipment; after the MAC layer of the terminal equipment receives a beam failure event reported by the physical layer, adding 1 to the value of a first counter and restarting a third timer; if the value of the first counter reaches the maximum value in the third timer operation period, the terminal equipment determines that the target TRP has the beam failure and triggers the beam failure recovery flow of the target TRP.

In the above scheme, as an example, the first counter may be a counter bfi_count, and the third timer may be a timer beamfailuredetection timer.

In the above solution, optionally, the physical layer of the terminal device measures a set of beam failure detection reference signals configured by the network device for the target TRP, and determines whether the quality of the PDCCH corresponding to the target TRP meets a specified threshold based on the measurement result. Here, optionally, the set of beam failure detection reference signals includes a CSI-RS set and/or an SSB set.

It should be noted that the network device may configure an independent beam failure detection configuration for each TRP, where the beam failure detection configuration includes a configuration of at least one of the following information: the terminal equipment performs the beam failure detection according to the corresponding beam failure detection configuration for each TRP, thereby determining whether the TRP has beam failure.

In this embodiment of the present application, the plurality of TRPs includes 2 TRPs or more (greater than 2 TRPs), and 2 TRPs are described below as an example, where more TRPs are also applicable to the technical solution in this embodiment of the present application.

The following describes how the terminal device determines whether a beam failure has occurred in the first cell and/or how to determine whether to trigger a beam failure recovery procedure for the first cell in connection with the plurality of TRPs including the first TRP and the second TRP.

Scheme one

If the first TRP triggers the beam failure recovery procedure, and if the beam failure recovery procedure triggered by the first TRP has not been completed successfully, the second TRP triggers the beam failure recovery procedure, the terminal device determines that the beam failure occurs in the first cell and/or determines to trigger the beam failure recovery procedure of the first cell.

In some optional embodiments, if the first TRP triggers a beam failure recovery procedure, the terminal device uses a first uplink resource to send beam failure information of the first TRP. Here, optionally, the first uplink resource is any uplink resource that can be used by the terminal device; or the first uplink resource is an uplink resource associated with the first TRP; or, the first uplink resource is an uplink resource associated with the second TRP.

In some optional embodiments, when the first uplink resource is the uplink resource associated with the second TRP, after the terminal device uses the uplink resource associated with the second TRP to send the beam failure information of the first TRP, if the terminal device does not receive the feedback information sent by the network device and aiming at the beam failure information or the scheduling information for scheduling new transmission, the terminal device determines that the beam failure occurs in the second TRP, and triggers a beam failure recovery procedure of the second TRP or directly triggers a beam failure recovery procedure of the first cell.

In the above scheme, the beam failure information of the first TRP is carried in a first type of BFR MAC CE, which may be referred to as a TRP BFR MAC CE or a truncated TRP BFR MAC CE, as an example. In some alternative embodiments, the beam failure information of the first TRP includes at least one of:

First information indicating a TRP identification of the first TRP;

second information indicating whether or not beam failure occurs to the first TRP;

third information indicating whether the first TRP has an available beam;

fourth information indicating a beam identity of an available beam on the first TRP;

fifth information, the fifth information is used for indicating the cell identification of the first cell;

sixth information, the sixth information is used for indicating a BandWidth Part (BWP) identifier corresponding to the first cell;

seventh information for indicating whether beam failure occurs in the first cell;

eighth information indicating whether the first cell has an available beam;

ninth information indicating beam identities of available beams on the first cell.

In the above scheme, the first type BFR MAC CE may carry beam failure information of one or more TRPs. For example: the BFR MAC CE of the first type only carries beam failure information of the first TRP. For example: the first type BFR MAC CE carries beam failure information of the first TRP and beam failure information of the second TRP.

Scheme II

If the first TRP triggers a beam failure recovery flow, the terminal equipment starts or restarts a first timer; if the beam failure recovery procedure triggered by the first TRP is not completed successfully and the beam failure recovery procedure is triggered by the second TRP in the operation period of the first timer, the terminal device determines that the beam failure occurs in the first cell and/or determines to trigger the beam failure recovery procedure of the first cell.

In some alternative embodiments, if the beam failure recovery procedure triggered by the first TRP is successfully completed during the operation period of the first timer, the terminal device stops the first timer.

In some optional embodiments, when the first uplink resource is the uplink resource associated with the second TRP, after the terminal device uses the uplink resource associated with the second TRP to send the beam failure information of the first TRP, if the terminal device does not receive the feedback information for the beam failure information or the scheduling information for scheduling new transmission sent by the network device in the first timer operation period, the terminal device determines that the beam failure occurs in the second TRP, and triggers a beam failure recovery procedure of the second TRP or directly triggers a beam failure recovery procedure of the first cell.

As an example: after the terminal equipment uses the uplink resource associated with the second TRP to send the beam failure information of the first TRP, if the terminal equipment does not receive the feedback information for the beam failure information or the scheduling information for scheduling new transmission sent by the network equipment in the operation period of the first timer, the terminal equipment determines that the second TRP has beam failure and triggers the beam failure recovery flow of the second TRP, and further, the terminal equipment can determine that the first cell has beam failure and then triggers the beam failure recovery flow of the first cell.

As an example: after the terminal device uses the uplink resource associated with the second TRP to send the beam failure information of the first TRP, if the terminal device does not receive the feedback information for the beam failure information or the scheduling information for scheduling new transmission sent by the network device in the operation period of the first timer, the terminal device can directly determine that the first cell has failed in the beam so as to trigger the beam failure recovery flow of the first cell.

first information indicating a TRP identification of the first TRP;

third information indicating whether the first TRP has an available beam;

Sixth information, where the sixth information is used to indicate a BWP identifier corresponding to the first cell;

eighth information indicating whether the first cell has an available beam;

Scheme III

If the first TRP triggers the beam failure recovery flow, the terminal equipment starts or restarts a second timer; if the beam failure recovery process triggered by the first TRP is not completed successfully in the running period of the second timer, the terminal equipment determines that the beam failure occurs in the first cell and/or determines to trigger the beam failure recovery process of the first cell; and/or, the terminal equipment determines that the beam failure recovery procedure of the first TRP fails.

In some alternative embodiments, if the beam failure recovery procedure triggered by the first TRP is successfully completed during the second timer running period, the terminal device stops the second timer.

In some optional embodiments, when the first uplink resource is the uplink resource associated with the second TRP, after the terminal device uses the uplink resource associated with the second TRP to send the beam failure information of the first TRP, if the terminal device does not receive the feedback information for the beam failure information or the scheduling information for scheduling new transmission sent by the network device in the second timer running period, the terminal device determines that the beam failure occurs in the second TRP, and triggers a beam failure recovery procedure of the second TRP or directly triggers a beam failure recovery procedure of the first cell.

As an example: after the terminal equipment uses the uplink resource associated with the second TRP to send the beam failure information of the first TRP, if the terminal equipment does not receive the feedback information of the beam failure information or the scheduling information for scheduling new transmission sent by the network equipment in the operation period of the second timer, the terminal equipment determines that the beam failure occurs in the second TRP and triggers the beam failure recovery flow of the second TRP, and further, the terminal equipment can determine that the beam failure recovery flow of the first TRP fails and/or the beam failure occurs in the first cell and triggers the beam failure recovery flow of the first cell.

As an example: after the terminal device uses the uplink resource associated with the second TRP to send the beam failure information of the first TRP, if the terminal device does not receive the feedback information for the beam failure information or the scheduling information for scheduling new transmission sent by the network device in the operation period of the second timer, the beam failure recovery flow failure of the first TRP and/or the beam failure of the first cell can be directly determined, and then the beam failure recovery flow of the first cell is triggered.

First information indicating a TRP identification of the first TRP;

third information indicating whether the first TRP has an available beam;

eighth information indicating whether the first cell has an available beam;

The second and third embodiments may be implemented independently or in combination.

In this embodiment of the present application, when the terminal device determines that the first cell fails to perform beam, a beam failure recovery procedure of the first cell is triggered. The following describes how to trigger the beam failure recovery procedure of the first cell in connection with different situations of the first cell.

Case one: the first cell is an SCell.

For this case, if the terminal device determines to trigger the beam failure recovery procedure of the first cell, the terminal device reports beam failure information of the first cell, where the beam failure information of the first cell is used for performing beam failure recovery of the first cell.

In the above scheme, the beam failure information of the first cell is carried in the second type BFR MAC CE. The second type of BFR MAC CE may be referred to as a BFR MAC CE or a truncated BFR MAC CE. In some alternative embodiments, the beam failure recovery information of the first cell includes at least one of:

eighth information indicating whether the first cell has an available beam;

ninth information indicating a beam identity of an available beam on the first cell;

tenth information for indicating TRP identification of TRP in which beam failure occurs in the first cell;

eleventh information for indicating whether beam failure occurs to at least part of TRPs in the first cell;

twelfth information for indicating whether at least part of TRPs in the first cell have available beams;

thirteenth information indicating beam identities of available beams on at least part of TRPs in the first cell.

In the above aspect, the eleventh information includes a first bitmap, where the first bitmap includes a plurality of bits, each bit in the plurality of bits corresponds to one TRP in the first cell, and a value of the bit is used to indicate whether the TRP corresponding to the bit has failed in a beam.

And a second case: the first cell is a special cell SpCell.

For this case, if the terminal device determines to trigger the beam failure recovery procedure of the first cell, the terminal device triggers the random access procedure to the first cell.

Specifically, the terminal device selects a random access preamble corresponding to the new candidate beam and PRACH resources to initiate random access, and the base station can determine the new candidate beam according to the random access preamble or the PRACH resources. If the terminal equipment monitors feedback information or newly transmitted scheduling information which is sent by the base station and aims at the beam failure recovery request, the terminal equipment considers that the beam failure recovery is successfully completed; if the terminal device does not monitor the feedback information or the newly transmitted scheduling information sent by the base station and aiming at the beam failure recovery request, the terminal device considers that the beam failure recovery is not completed successfully, and further, optionally, the terminal device can report the beam failure information of the first cell to the network device through MSG3 or MSG A.

eighth information indicating whether the first cell has an available beam;

The following describes the technical solutions of the embodiments of the present application by way of example with reference to specific application examples.

Application example 1

The physical layer of the terminal equipment judges whether the quality of the PDCCH corresponding to the reference signal meets a preset/configured threshold (such as Hypothetical BLER of the PDCCH or not) or not by measuring a beam failure detection reference signal set (such as a CSI-RS set and/or an SSB set) configured by the network equipment for TRP, and if the quality of the PDCCH corresponding to the reference signal is detected to not meet the preset/configured threshold, a beam failure event is reported to the MAC layer. For the MAC entity of the terminal device, whenever the physical layer reports a beam failure event to it, it will increment 1 for the COUNTER bfi_counter and restart the timer beamfailuredetection timer. If the value of the COUNTER BFI_COUNTER reaches the maximum value in the running period of the timer beamlailuredetection timer, the terminal equipment considers that the TRP has beam failure and triggers the beam failure recovery flow of the TRP.

If the first TRP in the cell triggers the beam failure recovery procedure, and if the beam failure recovery procedure triggered by the first TRP is not successfully completed, the second TRP in the cell triggers the beam failure recovery procedure, the terminal equipment considers that the cell has beam failure, and triggers the beam failure recovery procedure of the cell.

In some alternative embodiments, if the first TRP fails, the terminal device may use any uplink resource or uplink resources associated with the first TRP and/or the second TRP to generate the beam failure information of the first TRP, optionally, the beam failure information of the first TRP is carried in the TRP BFR MAC CE.

In some optional embodiments, if the cell in which the beam failure occurs is an SCell, the terminal device reports the beam failure information of the cell to perform beam failure recovery of the cell, and optionally, the beam failure information of the cell is carried in a BFR MAC CE.

In some alternative embodiments, if the cell in which the beam failure occurs is a SpCell, the terminal device triggers a random access procedure to recover the beam of the cell.

In the above solution, optionally, the terminal device may carry at least one of the following information in a beam failure recovery procedure of the cell:

cell identity of the cell;

a corresponding BWP identity of the cell;

TRP identification of TRP in which beam failure occurs in the cell; here, the TRP where the beam failure occurs is explicitly indicated by the identity of the beam failure detection reference signal set or the TRP identity corresponding to the TRP, or alternatively, the TRP where the beam failure occurs may also be implicitly indicated by 1 bit, for example, a value of 1 bit is 1 for indicating that the TRP where the beam failure occurs is the first TRP, and a value of 0 for 1 bit is for indicating that the TRP where the beam failure occurs is the second TRP;

A bit map for indicating whether beam failure occurs to each TRP in a cell; here, each bit in the bitmap corresponds to one TRP, for example, a bit value of 1 indicates that the corresponding TRP has failed in a beam, and a bit value of 0 indicates that the corresponding TRP has not failed in a beam;

whether a TRP in a cell where beam failure occurs has an available beam;

beam identification of available beams on TRP in the cell where beam failure occurred;

indication information for indicating whether a beam failure occurs in a cell;

indication information for indicating whether a cell has available beams;

beam identification of available beams on a cell.

According to the technical scheme, whether the two TRPs have beam failure or not can be intuitively judged, whether the cell has the beam failure or not is further judged, and a basis is provided for the recovery of the beam failure of the cell.

Application instance two

If the first TRP in the cell triggers the beam failure recovery flow, the terminal equipment starts or restarts the first timer, and if the beam failure recovery flow triggered by the first TRP is not successfully completed in the operation period of the first timer and the second TRP in the cell triggers the beam failure recovery flow, the terminal equipment considers that the cell has beam failure and triggers the beam failure recovery flow of the cell. Optionally, if the beam failure recovery procedure triggered by the first TRP is successfully completed (for example, the terminal device receives feedback information of the network device or receives new transmission scheduling information of the network device) during the operation period of the first timer, the terminal device stops the first timer.

cell identity of the cell;

a corresponding BWP identity of the cell;

whether a TRP in a cell where beam failure occurs has an available beam;

indication information for indicating whether a beam failure occurs in a cell;

indication information for indicating whether a cell has available beams;

beam identification of available beams on a cell.

According to the technical scheme, whether the two TRPs have beam failure or not can be intuitively judged, whether the cell has the beam failure or not is further judged, and a basis is provided for the recovery of the beam failure of the cell. Judging whether the two TRPs have beam failure or not through the first timer, and increasing the success rate of beam failure recovery is facilitated. In addition, the terminal device transmits beam failure information of TRP where beam failure occurs by using an uplink resource associated with TRP where beam failure does not occur, and if feedback information or new transmission scheduling information is not received during the operation period of the first timer, it is indicated that the channel quality of TRP where beam failure does not occur is also relatively weak, and in this case, it can be considered that a cell has beam failure. By the technical scheme, the overall time delay of beam failure recovery can be reduced.

Application example three

If the first TRP in the cell triggers the beam failure recovery flow, the terminal equipment starts or restarts the second timer, and if the beam failure recovery flow triggered by the first TRP is not successfully completed in the operation period of the second timer, the terminal equipment considers that the cell has beam failure and triggers the beam failure recovery flow of the cell. Optionally, if the beam failure recovery procedure triggered by the first TRP is successfully completed (for example, the terminal device receives feedback information of the network device or receives new transmission scheduling information of the network device) during the operation period of the second timer, the terminal device stops the second timer.

cell identity of the cell;

a corresponding BWP identity of the cell;

whether a TRP in a cell where beam failure occurs has an available beam;

indication information for indicating whether a beam failure occurs in a cell;

indication information for indicating whether a cell has available beams;

beam identification of available beams on a cell.

According to the technical scheme, whether the two TRPs have beam failure or not can be intuitively judged, whether the cell has the beam failure or not is further judged, and a basis is provided for the recovery of the beam failure of the cell. Wherein, the first TRP has beam failure, if the beam failure recovery procedure of the first TRP is not completed in the operation period of the second timer, the cell is considered to have beam failure, so that the overall delay of beam failure recovery can be reduced.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application. For example, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail. As another example, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be considered as disclosed herein. For example, the various embodiments and/or technical features of the various embodiments described herein may be combined with any other of the prior art without conflict, and the combined technical solutions should also fall within the scope of protection of the present application.

It should be further understood that, in the various method embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present application. Further, in the embodiment of the present application, the terms "downstream", "upstream" and "sidestream" are used to indicate a transmission direction of signals or data, where "downstream" is used to indicate that the transmission direction of signals or data is a first direction from a station to a user equipment of a cell, "upstream" is used to indicate that the transmission direction of signals or data is a second direction from the user equipment of the cell to the station, and "sidestream" is used to indicate that the transmission direction of signals or data is a third direction from the user equipment 1 to the user equipment 2. For example, "downstream signal" means that the transmission direction of the signal is the first direction. In addition, in the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, which means that three relationships may exist. Specifically, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Fig. 5 is a schematic structural diagram of a beam failure recovery apparatus provided in an embodiment of the present application, which is applied to a terminal device, as shown in fig. 5, where the beam failure recovery apparatus includes:

a determining unit 501, configured to determine whether a beam failure has occurred in a first cell and/or determine whether to trigger a beam failure recovery procedure of the first cell based on whether at least some of a plurality of TRPs triggers the beam failure recovery procedure, where the plurality of TRPs are TRPs of the first cell.

In some alternative embodiments, the plurality of TRPs includes a first TRP and a second TRP.

In some optional embodiments, the determining unit 501 is configured to determine that the first cell has a beam failure and/or determine to trigger a beam failure recovery procedure of the first cell if the first TRP triggers the beam failure recovery procedure and the second TRP triggers the beam failure recovery procedure if the beam failure recovery procedure triggered by the first TRP has not been completed successfully.

In some alternative embodiments, the apparatus further comprises: a control unit 502;

the control unit 502 is configured to start or restart a first timer if the first TRP triggers a beam failure recovery procedure;

The determining unit 501 is configured to determine that the beam failure occurs in the first cell and/or determine to trigger the beam failure recovery procedure of the first cell if the beam failure recovery procedure triggered by the first TRP has not been completed successfully and the beam failure recovery procedure is triggered by the second TRP during the operation period of the first timer.

In some optional embodiments, the control unit 502 is further configured to stop the first timer if the beam failure recovery procedure triggered by the first TRP is successfully completed during the operation period of the first timer.

the control unit 502 is configured to start or restart a second timer if the first TRP triggers a beam failure recovery procedure;

the determining unit 501 is configured to determine that a beam failure has occurred in the first cell and/or determine that a beam failure recovery procedure for triggering the first cell is determined if the beam failure recovery procedure triggered by the first TRP has not been completed successfully within the second timer running period.

In some optional embodiments, the control unit 502 is further configured to stop the second timer if the beam failure recovery procedure triggered by the first TRP is successfully completed during the operation period of the second timer.

In some alternative embodiments, the apparatus further comprises:

a transmitting unit 503, configured to transmit beam failure information of the first TRP by using a first uplink resource if the beam failure recovery procedure is triggered by the first TRP.

In some optional embodiments, the first uplink resource is any uplink resource that can be used by the terminal device; or the first uplink resource is an uplink resource associated with the first TRP; or, the first uplink resource is an uplink resource associated with the second TRP.

In some alternative embodiments, the apparatus further comprises: a receiving unit;

when the first uplink resource is the uplink resource associated with the second TRP, after the transmitting unit 503 transmits the beam failure information of the first TRP using the uplink resource associated with the second TRP, if the receiving unit does not receive the feedback information for the beam failure information or the scheduling information for scheduling new transmission sent by the network device, the determining unit 501 determines that the beam failure occurs in the second TRP, and triggers a beam failure recovery procedure of the second TRP or triggers a beam failure recovery procedure of the first cell.

when the first uplink resource is the uplink resource associated with the second TRP, after the transmitting unit 502 uses the uplink resource associated with the second TRP to transmit the beam failure information of the first TRP, if the receiving unit does not receive the feedback information for the beam failure information or the scheduling information for scheduling new transmission sent by the network device in the first timer operation period, the determining unit 501 determines that the beam failure occurs in the second TRP, and triggers the beam failure recovery procedure of the second TRP or triggers the beam failure recovery procedure of the first cell.

In some alternative embodiments, the beam failure information of the first TRP is carried in a BFR MAC CE of a first type.

In some alternative embodiments, the beam failure information of the first TRP includes at least one of:

first information indicating a TRP identification of the first TRP;

third information indicating whether the first TRP has an available beam;

eighth information indicating whether the first cell has an available beam;

In some alternative embodiments, the apparatus further comprises:

a sending unit 503, configured to, if the determining unit 501 determines that the beam failure recovery procedure of the first cell is triggered when the first cell is an SCell, report beam failure information of the first cell, where the beam failure information of the first cell is used to perform beam failure recovery of the first cell; or, if the determining unit 501 determines to trigger the beam failure recovery procedure of the first cell when the first cell is the cell SpCell, the random access procedure to the first cell is triggered.

In some alternative embodiments, the beam failure information of the first cell is carried in a BFR MAC CE of the second type.

In some alternative embodiments, the beam failure recovery information of the first cell includes at least one of:

eighth information indicating whether the first cell has an available beam;

In some alternative embodiments, the eleventh information includes a first bitmap, the first bitmap including a plurality of bits, each bit of the plurality of bits corresponding to one TRP in the first cell, the bit having a value indicating whether the TRP to which the bit corresponds has failed.

In some alternative embodiments, the apparatus further comprises:

a detecting unit 504, configured to report a beam failure event to a MAC layer of the terminal device through detection by the physical layer of the terminal device that signal quality of a target TRP does not meet a specified threshold; after the MAC layer of the terminal equipment receives a beam failure event reported by the physical layer, adding 1 to the value of a first counter and restarting a third timer; if the value of the first counter reaches the maximum value in the third timer operation period, determining that the target TRP has beam failure, and triggering a beam failure recovery flow of the target TRP;

wherein the target TRP is any one TRP in the first cell.

In some optional embodiments, the detecting unit 504 is further configured to measure, by the physical layer of the terminal device, a set of beam failure detection reference signals configured by the network device for the target TRP, and determine, based on a measurement result, whether the quality of the PDCCH corresponding to the target TRP meets a specified threshold.

In some optional embodiments, the set of beam failure detection reference signals comprises a set of CSI-RS and/or a set of SSB.

It should be understood by those skilled in the art that the above description of the beam failure recovery apparatus according to the embodiments of the present application may be understood with reference to the description of the beam failure recovery method according to the embodiments of the present application.

Fig. 6 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. The communication device may be a terminal device or a network device. The communication device 600 shown in fig. 6 comprises a processor 610, from which the processor 610 may call and run a computer program to implement the method in the embodiments of the present application.

Optionally, as shown in fig. 6, the communication device 600 may also include a memory 620. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the methods in embodiments of the present application.

The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

Optionally, as shown in fig. 6, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

The transceiver 630 may include a transmitter and a receiver, among others. Transceiver 630 may further include antennas, the number of which may be one or more.

Optionally, the communication device 600 may be specifically a network device in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 600 may be specifically a mobile terminal/terminal device in the embodiment of the present application, and the communication device 600 may implement corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which are not described herein for brevity.

Fig. 7 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 700 shown in fig. 7 includes a processor 710, and the processor 710 may call and run a computer program from a memory to implement the methods in the embodiments of the present application.

Optionally, as shown in fig. 7, chip 700 may also include memory 720. Wherein the processor 710 may call and run a computer program from the memory 720 to implement the methods in embodiments of the present application.

Wherein the memory 720 may be a separate device from the processor 710 or may be integrated into the processor 710.

Optionally, the chip 700 may also include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

Optionally, the chip 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

Optionally, the chip may be applied to a network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the chip may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

Fig. 8 is a schematic block diagram of a communication system 800 provided in an embodiment of the present application. As shown in fig. 8, the communication system 800 includes a terminal device 810 and a network device 820.

The terminal device 810 may be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 820 may be used to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is exemplary but not limiting, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, which is not described herein for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

Optionally, the computer program product may be applied to a mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer program may be applied to a mobile terminal/terminal device in the embodiments of the present application, where the computer program when run on a computer causes the computer to execute corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiments of the present application, and for brevity, will not be described herein.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units 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 essentially or in a part contributing to the prior art or in a 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.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb 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.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of beam failure recovery, the method comprising:

the terminal device determines whether a beam failure has occurred in a first cell and/or determines whether to trigger a beam failure recovery procedure of the first cell based on whether at least some of a plurality of transmission and reception points TRPs trigger the beam failure recovery procedure, wherein the plurality of TRPs are TRPs of the first cell.
The method of claim 1, wherein the plurality of TRPs comprises a first TRP and a second TRP.
The method of claim 2, wherein the terminal device determining whether a beam failure occurred in the first cell and/or determining whether to trigger a beam failure recovery procedure for the first cell based on whether at least some of the plurality of TRPs triggered the beam failure recovery procedure comprises:

If the first TRP triggers the beam failure recovery procedure, and if the beam failure recovery procedure triggered by the first TRP has not been completed successfully, the second TRP triggers the beam failure recovery procedure, the terminal device determines that the beam failure occurs in the first cell and/or determines to trigger the beam failure recovery procedure of the first cell.
The method of claim 2, wherein the terminal device determining whether a beam failure occurred in the first cell and/or determining whether to trigger a beam failure recovery procedure for the first cell based on whether at least some of the plurality of TRPs triggered the beam failure recovery procedure comprises:

if the first TRP triggers a beam failure recovery flow, the terminal equipment starts or restarts a first timer;

if the beam failure recovery procedure triggered by the first TRP is not completed successfully and the beam failure recovery procedure is triggered by the second TRP in the operation period of the first timer, the terminal device determines that the beam failure occurs in the first cell and/or determines to trigger the beam failure recovery procedure of the first cell.
The method of claim 4, wherein the method further comprises:

And if the beam failure recovery flow triggered by the first TRP is successfully completed in the operation period of the first timer, stopping the first timer by the terminal equipment.
The method according to claim 2 or 4, wherein the terminal device determines whether a beam failure has occurred in the first cell and/or determines whether to trigger a beam failure recovery procedure for the first cell based on whether at least some of the plurality of TRPs trigger the beam failure recovery procedure, comprising:

if the first TRP triggers the beam failure recovery flow, the terminal equipment starts or restarts a second timer;

if the beam failure recovery procedure triggered by the first TRP is not completed successfully in the operation period of the second timer, the terminal device determines that the beam failure occurs in the first cell and/or determines to trigger the beam failure recovery procedure of the first cell.
The method of claim 6, wherein the method further comprises:

and if the beam failure recovery flow triggered by the first TRP is successfully completed in the operation period of the second timer, stopping the second timer by the terminal equipment.
The method of any of claims 3 to 7, wherein the method further comprises:

And if the first TRP triggers the beam failure recovery flow, the terminal equipment uses the first uplink resource to send the beam failure information of the first TRP.
The method of claim 8, wherein,

the first uplink resource is any uplink resource which can be used by the terminal equipment; or,

the first uplink resource is an uplink resource associated with the first TRP; or,

the first uplink resource is an uplink resource associated with the second TRP.
The method of claim 9, wherein in a case where the first uplink resource is an uplink resource associated with the second TRP, the method further comprises:

after the terminal equipment sends the beam failure information of the first TRP by using the uplink resource associated with the second TRP, if the terminal equipment does not receive feedback information for the beam failure information or scheduling information for scheduling new transmission sent by the network equipment, the terminal equipment determines that the beam failure occurs in the second TRP and triggers a beam failure recovery flow of the second TRP or triggers a beam failure recovery flow of the first cell.
The method of claim 9, wherein in a case where the first uplink resource is an uplink resource associated with the second TRP, the method further comprises:

After the terminal equipment uses the uplink resource associated with the second TRP to send the beam failure information of the first TRP, if the terminal equipment does not receive the feedback information for the beam failure information or the scheduling information for scheduling new transmission sent by the network equipment in the operation period of the first timer, the terminal equipment determines that the beam failure occurs in the second TRP and triggers the beam failure recovery flow of the second TRP or triggers the beam failure recovery flow of the first cell.
The method according to any of claims 8 to 11, wherein the beam failure information of the first TRP is carried in a first type beam failure recovery BFR medium access control, MAC, control element CE.
The method of any of claims 8-12, wherein the beam failure information of the first TRP comprises at least one of:

first information indicating a TRP identification of the first TRP;

second information indicating whether or not beam failure occurs to the first TRP;

third information indicating whether the first TRP has an available beam;

fourth information indicating a beam identity of an available beam on the first TRP;

Fifth information, the fifth information is used for indicating the cell identification of the first cell;

sixth information, where the sixth information is used to indicate a BWP identifier corresponding to the first cell;

seventh information for indicating whether beam failure occurs in the first cell;

eighth information indicating whether the first cell has an available beam;

ninth information indicating beam identities of available beams on the first cell.
The method of any one of claims 1 to 13, wherein the method further comprises:

if the terminal equipment determines to trigger the beam failure recovery flow of the first cell under the condition that the first cell is an auxiliary cell SCell, the terminal equipment reports beam failure information of the first cell, wherein the beam failure information of the first cell is used for carrying out beam failure recovery of the first cell; or,

and if the terminal equipment determines to trigger the beam failure recovery flow of the first cell under the condition that the first cell is the special cell SpCell, the terminal equipment triggers the random access flow to the first cell.
The method of claim 14, wherein the beam failure information of the first cell is carried in a second type BFR MAC CE.
The method of claim 14 or 15, wherein the beam failure recovery information of the first cell comprises at least one of:

fifth information, the fifth information is used for indicating the cell identification of the first cell;

sixth information, wherein the sixth information is used for indicating a bandwidth part BWP identifier corresponding to the first cell;

seventh information for indicating whether beam failure occurs in the first cell;

eighth information indicating whether the first cell has an available beam;

ninth information indicating a beam identity of an available beam on the first cell;

tenth information for indicating TRP identification of TRP in which beam failure occurs in the first cell;

eleventh information for indicating whether beam failure occurs to at least part of TRPs in the first cell;

twelfth information for indicating whether at least part of TRPs in the first cell have available beams;

Thirteenth information indicating beam identities of available beams on at least part of TRPs in the first cell.
The method of claim 16, wherein the eleventh information comprises a first bitmap comprising a plurality of bits, each bit of the plurality of bits corresponding to one TRP in the first cell, the bit having a value indicating whether the TRP to which the bit corresponds has failed a beam.
The method of any one of claims 1 to 17, wherein the method further comprises:

the physical layer of the terminal equipment detects that the signal quality of a target TRP does not meet a specified threshold, and reports a beam failure event to the MAC layer of the terminal equipment;

after the MAC layer of the terminal equipment receives a beam failure event reported by the physical layer, adding 1 to the value of a first counter and restarting a third timer;

if the value of the first counter reaches the maximum value in the third timer operation period, the terminal equipment determines that the target TRP has the beam failure and triggers the beam failure recovery flow of the target TRP;

Wherein the target TRP is any one TRP in the first cell.
The method of claim 18, wherein the method further comprises:

and the physical layer of the terminal equipment measures a beam failure detection reference signal set configured by the network equipment for the target TRP, and determines whether the quality of a physical downlink control channel PDCCH corresponding to the target TRP meets a specified threshold or not based on a measurement result.
The method of claim 19, wherein the set of beam failure detection reference signals comprises a set of channel state information-reference signals, CSI-RS, and/or a set of synchronization signal blocks, SSBs.
A beam failure recovery apparatus for use in a terminal device, the apparatus comprising:

a determining unit, configured to determine whether a beam failure occurs in a first cell and/or determine whether to trigger a beam failure recovery procedure of the first cell based on whether at least some of a plurality of TRPs trigger the beam failure recovery procedure, where the plurality of TRPs are TRPs of the first cell.
The apparatus of claim 21, wherein the plurality of TRPs comprises a first TRP and a second TRP.
The apparatus of claim 22, wherein the determining unit is configured to determine that the first cell has failed and/or determine to trigger the beam failure recovery procedure of the first cell if the first TRP triggers the beam failure recovery procedure and the second TRP triggers the beam failure recovery procedure if the beam failure recovery procedure triggered by the first TRP has not been successfully completed.
The apparatus of claim 22, wherein the apparatus further comprises: a control unit;

the control unit is configured to start or restart a first timer if the first TRP triggers a beam failure recovery procedure;

the determining unit is configured to determine that the first cell has a beam failure and/or determine to trigger a beam failure recovery procedure of the first cell if the beam failure recovery procedure triggered by the first TRP has not been completed successfully and the beam failure recovery procedure triggered by the second TRP is within the operation period of the first timer.
The apparatus of claim 24, wherein the control unit is further configured to stop the first timer if the beam failure recovery procedure triggered by the first TRP is successfully completed during the operation of the first timer.
The apparatus of claim 22 or 24, wherein the apparatus further comprises: a control unit;

the control unit is configured to start or restart a second timer if the first TRP triggers a beam failure recovery procedure;

the determining unit is configured to determine that a beam failure occurs in the first cell and/or determine that a beam failure recovery procedure for triggering the first cell is determined if the beam failure recovery procedure triggered by the first TRP has not been completed successfully in the second timer running period.
The apparatus of claim 26, wherein the control unit is further configured to stop the second timer if the beam failure recovery procedure triggered by the first TRP is successfully completed during the second timer.
The apparatus of any one of claims 23 to 27, wherein the apparatus further comprises:

a transmitting unit, configured to transmit beam failure information of the first TRP by using a first uplink resource if the beam failure recovery procedure is triggered by the first TRP.
The apparatus of claim 28, wherein,

the first uplink resource is any uplink resource which can be used by the terminal equipment; or,

the first uplink resource is an uplink resource associated with the first TRP; or,

the first uplink resource is an uplink resource associated with the second TRP.
The apparatus of claim 29, wherein the apparatus further comprises: a receiving unit;

when the first uplink resource is the uplink resource associated with the second TRP, after the transmitting unit transmits the beam failure information of the first TRP by using the uplink resource associated with the second TRP, if the receiving unit does not receive feedback information for the beam failure information or scheduling information for scheduling new transmission, which are transmitted by the network device, the determining unit determines that the beam failure occurs in the second TRP, and triggers a beam failure recovery procedure of the second TRP or triggers a beam failure recovery procedure of the first cell.
The apparatus of claim 29, wherein the apparatus further comprises: a receiving unit;

when the first uplink resource is the uplink resource associated with the second TRP, after the transmitting unit transmits the beam failure information of the first TRP by using the uplink resource associated with the second TRP, if the receiving unit does not receive the feedback information for the beam failure information or the scheduling information for scheduling new transmission sent by the network device in the operation period of the first timer, the determining unit determines that the beam failure occurs in the second TRP, and triggers the beam failure recovery procedure of the second TRP or triggers the beam failure recovery procedure of the first cell.
The apparatus of any of claims 28 to 31, wherein the beam failure information of the first TRP is carried in a first type BFR MAC CE.
The apparatus of any of claims 28 to 32, wherein the beam failure information of the first TRP comprises at least one of:

first information indicating a TRP identification of the first TRP;

second information indicating whether or not beam failure occurs to the first TRP;

Third information indicating whether the first TRP has an available beam;

fourth information indicating a beam identity of an available beam on the first TRP;

fifth information, the fifth information is used for indicating the cell identification of the first cell;

sixth information, where the sixth information is used to indicate a BWP identifier corresponding to the first cell;

seventh information for indicating whether beam failure occurs in the first cell;

eighth information indicating whether the first cell has an available beam;

ninth information indicating beam identities of available beams on the first cell.
The apparatus of any one of claims 21 to 33, wherein the apparatus further comprises:

a sending unit, configured to, if the determining unit determines that the beam failure recovery procedure of the first cell is triggered when the first cell is an SCell, report beam failure information of the first cell, where the beam failure information of the first cell is used to perform beam failure recovery of the first cell; or if the determining unit determines to trigger the beam failure recovery procedure of the first cell, triggering the random access procedure to the first cell.
The apparatus of claim 34, wherein beam failure information for the first cell is carried in a second type BFR MAC CE.
The apparatus of claim 34 or 35, wherein the beam failure recovery information of the first cell comprises at least one of:

fifth information, the fifth information is used for indicating the cell identification of the first cell;

sixth information, where the sixth information is used to indicate a BWP identifier corresponding to the first cell;

seventh information for indicating whether beam failure occurs in the first cell;

eighth information indicating whether the first cell has an available beam;

ninth information indicating a beam identity of an available beam on the first cell;

tenth information for indicating TRP identification of TRP in which beam failure occurs in the first cell;

eleventh information for indicating whether beam failure occurs to at least part of TRPs in the first cell;

twelfth information for indicating whether at least part of TRPs in the first cell have available beams;

Thirteenth information indicating beam identities of available beams on at least part of TRPs in the first cell.
The apparatus of claim 36, wherein the eleventh information comprises a first bitmap comprising a plurality of bits, each bit of the plurality of bits corresponding to one TRP in the first cell, the bit having a value indicating whether the TRP to which the bit corresponds has failed a beam.
The apparatus of any one of claims 21 to 37, wherein the apparatus further comprises:

a detection unit, configured to report a beam failure event to a MAC layer of the terminal device through detection by a physical layer of the terminal device that signal quality of a target TRP does not meet a specified threshold; after the MAC layer of the terminal equipment receives a beam failure event reported by the physical layer, adding 1 to the value of a first counter and restarting a third timer; if the value of the first counter reaches the maximum value in the third timer operation period, determining that the target TRP has beam failure, and triggering a beam failure recovery flow of the target TRP;

Wherein the target TRP is any one TRP in the first cell.
The apparatus of claim 38, wherein the detecting unit is further configured to measure, by a physical layer of the terminal device, a set of beam failure detection reference signals configured by a network device for the target TRP, and determine whether a quality of a PDCCH corresponding to the target TRP meets a specified threshold based on a measurement result.
The apparatus of claim 39, in which the set of beam failure detection reference signals comprises a set of CSI-RS and/or a set of SSBs.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory, performing the method of any of claims 1 to 20.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 20.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 20.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 20.
A computer program which causes a computer to perform the method of any one of claims 1 to 20.