METHOD AND APPARATUS FOR GENERATING AND REPORTING BEAM FAILURE INFORMATION

1 . An apparatus for generating beam failure information, comprising a memory and processor circuitry, the memory storing instructions, and the processor circuitry being configured to execute the instructions to implement the following:

detecting that beam failure recovery (BFR) of a transmission reception point (TRP) is triggered; and

generating a BFR medium access control (MAC) control element (CE) in case where at least one beam failure recovery has been triggered and not cancelled for the TRP and evaluation of candidate beams has been completed, wherein the BFR MAC CE indicates information for the TRP in which beam failure recovery is triggered.

2 . The apparatus according to claim 1 , wherein the information for the TRP comprises: an index or an identifier of the TRP in which beam failure is detected or for which beam failure recovery is triggered.

3 . The apparatus according to claim 2 , wherein

a value of 1 bit in the BFR MAC CE indicates that beam failure recovery is triggered for the TRP to which a control resource pool with an index of 0 corresponds, and another value of the 1 bit therein indicates that beam failure recovery is triggered for the TRP to which a control resource pool with an index of 1 corresponds;

or,

a value of 1 bit in the BFR MAC CE indicates that a beam failure is detected to which a beam failure detection reference signal set with a first index corresponds, and another value of the 1 bit therein indicates that a beam failure is detected to which a beam failure detection reference signal set with a second index corresponds.

4 . The apparatus according to claim 2 , wherein

a value of 2 bits in the BFR MAC CE indicates one or any combination of the following that:

a beam failure is not detected in TRP or beam failure recovery is not triggered for a TRP;

a beam failure is detected in a TRP to which a control resource pool with an index of 0 corresponds or beam failure recovery is triggered for a TRP to which a control resource pool with an index of 0 corresponds;

a beam failure is detected in a TRP to which a control resource pool with an index of 1 corresponds or beam failure recovery is triggered for a TRP to which a control resource pool with an index of 1 corresponds;

a beam failure is detected both in a TRP to which a control resource pool with an index of 0 corresponds and a TRP to which a control resource pool with an index of 1 corresponds or beam failure recovery is triggered both for a TRP to which a control resource pool with an index of 0 corresponds and a TRP to which a control resource pool with an index of 1 corresponds;

or, a value of 2 bits in the BFR MAC CE indicates one or any combination of the following that:

a beam failure is not detected in TRP or beam failure recovery is not triggered for a TRP;

a beam failure is detected in a TRP with an index of 0 or beam failure recovery is triggered for a TRP with an index of 0;

a beam failure is detected in a TRP with an index of 1 or beam failure recovery is triggered for a TRP with an index of 1;

a beam failure is detected both in a TRP with an index of 0 and a TRP with an index of 1 or beam failure recovery is triggered both for a TRP with an index of 0 and a TRP with an index of 1;

or, a value of 2 bits in the BFR MAC CE indicates one or any combination of the following that:

a beam failure is not detected in TRPs or beam failure recovery is not triggered for a TRPs;

a beam failure is detected in a TRP to which a beam failure detection reference signal set with an index of 0 corresponds or beam failure recovery is triggered for a TRP to which a beam failure detection reference signal set with an index of 0 corresponds, or a beam failures is detected in all beams to which a beam failure detection reference signal set with an index of 0 corresponds or beam failure recovery is triggered for all beams to which a beam failure detection reference signal set with an index of 0 corresponds;

a beam failure is detected in a TRP to which a beam failure detection reference signal set with an index of 1 corresponds or beam failure recovery is triggered for a TRP to which a beam failure detection reference signal set with an index of 1 corresponds, or a beam failure is detected in all beams to which a beam failure detection reference signal set with an index of 1 corresponds or beam failure recovery is triggered for all beams to which a beam failure detection reference signal set with an index of 1 corresponds;

a beam failure is detected in both a TRP to which a beam failure detection reference signal set with an index of 0 corresponds and a TRP to which a beam failure detection reference signal set with an index of 1 corresponds or beam failure recovery is triggered for both a TRP to which the beam failure detection reference signal set with an index of 0 corresponds and a TRP to which the beam failure detection reference signal set with an index of 1 corresponds, or a beam failure is detected in all beams to which the beam failure detection reference signal set with an index of 0 corresponds and all beams to which the beam failure detection reference signal set with an index of 1 corresponds or beam failure recovery is triggered for all beams to which the beam failure detection reference signal set with an index of 0 corresponds and all beams to which the beam failure detection reference signal set with an index of 1 corresponds.

5 . The apparatus according to claim 2 , wherein

R bit(s) in a BFR MAC CE or a truncated BFR MAC CE is(are) used to carry/indicate/represent an index of the TRP in which beam failure is detected or for which beam failure recovery is triggered;

or,

R bit(s) and AC field(s) in a BFR MAC CE or a truncated BFR MAC CE are used to carry/indicate/represent an index of the TRP in which beam failure is detected or for which beam failure recovery is triggered.

6 . The apparatus according to claim 1 , wherein the BFR MAC CE comprises: a type of a detected beam failure or a type of triggered beam failure recovery.

7 . The apparatus according to claim 6 , wherein 1 bit in the BFR MAC CE indicates the type of a detected beam failure or the type of triggered beam failure recovery,

a value of the 1 bit indicating that cell-specific beam failures or beam failures of all beams are detected or cell-specific beam failure recovery or beam failure recovery of all beams is triggered, and another value of the 1 bit indicating that TRP-specific beam failures or beam failures of a part of beams are detected or TRP-specific beam failure recovery or beam failure recovery of a part of beams is triggered; or

a value of the 1 bit indicating that cell-specific beam failures or beam failures of all beams are detected or cell-specific beam failure recovery or beam failure recovery of all beams is triggered, and another value of the 1 bit indicating that non-cell-specific beam failures or beam failures of not all beams are detected or non-cell-specific beam failure recovery or beam failure recovery of not all beam is triggered; or

a value of the 1 bit indicating that TRP-specific beam failures or beam failures of a part of beams are detected or TRP-specific beam failure recovery or beam failure recovery of a part of beams is triggered, and another value of the 1 bit indicating that non-TRP-specific beam failures or beam failures of not a part of beams are detected or non-TRP-specific beam failure recovery or beam failure recovery of not a part of beams is triggered.

8 . The apparatus according to claim 6 , wherein 2 bits in the BFR MAC CE indicate the type of a detected beam failure or the type of triggered beam failure recovery,

a value of the 2 bits indicating that cell-specific beam failures or beam failures of all beams are not detected or cell-specific beam failure recovery or beam failure recovery of all beams is not triggered, and TRP-specific beam failures or beam failures of a part of beams are not detected or TRP-specific beam failure recovery or beam failure recovery of a part of beams is not triggered; another value of the 2 bits indicating that cell-specific beam failures or beam failures of all beams are detected or cell-specific beam failure recovery or beam failure recovery of all beams is triggered; a further value of the 2 bits indicating that TRP-specific beam failures or beam failures of a part of beams are detected or TRP-specific beam failure recovery or beam failure recovery of a part of beams is triggered; yet another value of the 2 bits indicating that cell-specific beam failures or beam failures of all beams are detected or cell-specific beam failure recovery or beam failure recovery of all beams is triggered, and TRP-specific beam failures or beam failures of a part of beams are detected or TRP-specific beam failure recovery or beam failure recovery of a part of beams is triggered;

a value of the 2 bits indicating that cell-specific beam failures or beam failures of all beams are not detected or cell-specific beam failure recovery or beam failure recovery of all beams is not triggered, and non-cell-specific beam failures or beam failures of not all beams are not detected or non-cell-specific beam failure recovery or beam failure recovery of not all beams is not triggered; another value of the 2 bits indicating that cell-specific beam failures or beam failures of all beams are detected or cell-specific beam failure recovery or beam failure recovery of all beams is triggered; a further value of the 2 bits indicating that non-cell-specific beam failures or beam failures of not all beams are detected or non-cell-specific beam failure recovery or beam failure recovery of not all beams is triggered; yet another value of the 2 bits indicating that cell-specific beam failures or beam failures of all beams are detected or cell-specific beam failure recovery or beam failure recovery of all beams is triggered, and non-cell-specific beam failures or beam failures of not all beams are detected or non-cell-specific beam failure recovery or beam failure recovery of not all beams is triggered; and

a value of the 2 bits indicating that non-TRP-specific beam failures or beam failures of not a part of beams are not detected or non-TRP-specific beam failure recovery or beam failure recovery of not a part of beams is not triggered, and TRP-specific beam failures or beam failures of a part of beams are not detected or TRP-specific beam failure recovery or beam failure recovery of a part of beams is not triggered; another value of the 2 bits indicating that non-TRP-specific beam failures or beam failures of not a part of beams are detected or non-TRP-specific beam failure recovery or beam failure recovery of not a part of beams is triggered; a further value of the 2 bits indicating that TRP-specific beam failures or beam failures of a part of beams are detected or TRP-specific beam failure recovery or beam failure recovery of a part of beams is triggered; yet another value of the 2 bits indicating that non-TRP-specific beam failures or beam failures of not a part of beams are detected or non-TRP-specific beam failure recovery or beam failure recovery of not a part of beams is triggered, and TRP-specific beam failures or beam failures of a part of beams are detected or TRP-specific beam failure recovery or beam failure recovery of a part of beams is triggered.

9 . The apparatus according to claim 6 , wherein

R bit(s) in a BFR MAC CE or a truncated BFR MAC CE is(are) used to carry/indicate/represent the type of a detected beam failure or the type of triggered beam failure recovery;

or,

R bit(s) and AC field(s) in a BFR MAC CE or a truncated BFR MAC CE are used to carry/indicate/represent the type of a detected beam failure or the type of triggered beam failure recovery.

10 . The apparatus according to claim 1 , wherein the BFR MAC CE comprises at least one or any combination of the following information: information of a cell to which the TRP in which a beam failure is detected or for which beam failure recovery is triggered belongs, whether information of candidate beams is found, and information of the candidate beams.

11 . The apparatus according to claim 1 , wherein the processor circuitry is further configured to execute the instructions to implement the following:

transmitting the BFR MAC CE to a network device,

wherein the BFR MAC CE is transferred to the network device via another TRP of a cell to which the TRP belongs, or the BFR MAC CE is transferred to the network device via a TRP, co-located with the TRP, of a cell different from a cell to which the TRP belongs, or the BFR MAC CE is reported to the network device via a cell different from a cell to which the TRP belongs.

12 . The apparatus according to claim 11 , wherein the processor circuitry is further configured to execute the instructions to implement the following:

transmitting the BFR MAC CE by using one of the following uplink grants:

an uplink grant of a TRP where a TRP-specific beam failure is not detected of a cell to which the TRP where a TRP-specific beam failure is detected belongs;

an uplink grant of the TRP, co-located with a TRP where a TRP-specific beam failure is detected, of a cell different from a cell to which the TRP where a TRP-specific beam failure is detected belongs;

an uplink grant of a cell different from a cell to which a TRP where a TRP-specific beam failure is detected belongs.

13 . The apparatus according to claim 1 , wherein a media access control entity instructs a multiplexing and assembly procedure to generate a TRP-specific BFR MAC CE;

the TRP-specific BFR MAC CE being different from a cell-specific BFR MAC CE.

14 . The apparatus according to claim 13 , the TRP-specific BFR MAC CE is generated by using an independent procedure from a procedure of the cell-specific BFR MAC CE;

or, the cell-specific BFR MAC CE and the TRP-specific BFR MAC CE are generated by using one procedure.

15 . The apparatus according to claim 13 , wherein a priority of a logical channel to which a TRP-specific BFR MAC CE corresponds is lower than a priority of a logical channel to which a Cell-Radio Network Temporary Identifier (C-RNTI) MAC CE or data from an uplink channel correspond(s), and is higher than a priority of a logical channel to which a cell-specific BFR MAC CE corresponds;

or, a priority of a logical channel to which a TRP-specific BFR MAC CE corresponds is identical to a priority of a logical channel to which a cell-specific BFR MAC CE corresponds;

or, a priority of a logical channel to which a TRP-specific BFR MAC CE corresponds is lower than a priority of a logical channel to which a cell-specific BFR MAC CE corresponds, and is higher than a priority of a logical channel to which a Sidelink Configured Grant Confirmation MAC CE corresponds;

or, a priority of a logical channel to which a TRP-specific BFR MAC CE corresponds is identical to a priority of a logical channel to which a Sidelink Configured Grant Confirmation MAC CE corresponds;

or, a priority of a logical channel to which a TRP-specific BFR MAC CE corresponds is lower than a priority of a logical channel to which a Sidelink Configured Grant Confirmation MAC CE corresponds, and is higher than a priority of a logical channel to which a listen before talk (LBT) failure MAC CE corresponds;

or, a priority of a logical channel to which a TRP-specific BFR MAC CE corresponds is identical to a priority of a logical channel to which an LBT failure MAC CE corresponds;

or, a priority of a logical channel to which a TRP-specific BFR MAC CE corresponds is lower than a priority of a logical channel to which an LBT failure MAC CE corresponds, and is higher than a priority of a logical channel to which a MAC CE for SL-BSR corresponds.

16 . The apparatus according to claim 1 , wherein the BFR MAC CE comprises: information of candidate beams,

the information of candidate beams comprising an index of a synchronization signal block or an index of a channel state information reference signal, or the information of candidate beams indicating an order of occurrence in configured candidate beams;

and the candidate beams satisfying at least one of the following conditions that:

the candidate beams are included in a candidate beam list configured for the TRP where TRP-specific beam failure is detected, or the candidate beams are included in a candidate beam/beam failure detection reference signal BFD-RS list configured for a cell to which the TRP where TRP-specific beam failure is detected belongs, or the candidate beams are included in a candidate beam/BFD-RS list configured for another TRP of a cell to which the TRP where TRP-specific beam failure is detected belongs;

reference signal received power is higher than a configured threshold;

a signal to interference plus noise ratio is higher than a configured threshold;

a received signal strength indicator is higher than a configured threshold;

beams/reference signals paired therewith are included in the candidate beam list configured for the TRP where TRP-specific beam failure is detected, or beams/reference signals paired therewith are included in the candidate beam/BFD-RS list configured for the cell to which the TRP where TRP-specific beam failure is detected belongs, or beams/reference signals paired therewith are included in the candidate beam/BFD-RS list configured for another TRP of the cell to which the TRP where TRP-specific beam failure is detected belongs;

measurement values of the beams/reference signals paired therewith are higher than a configured threshold.

17 . The apparatus according to claim 1 , wherein the BFR MAC CE is MAC CE for a plurality of TRPs including the TRP.

18 . A terminal equipment for communicating with a network device via a communication network, comprising:

a memory that stores a plurality of instructions; and

processor circuitry coupled to the memory and configured to execute the instructions to:

detect that beam failure recovery (BFR) of a transmission reception point (TRP) is triggered; and

generate a BFR medium access control (MAC) control element (CE) in case where at least one beam failure recovery has been triggered and not cancelled for the TRP and evaluation of candidate beams has been completed, wherein the BFR MAC CE indicates information for the TRP in which beam failure recovery is triggered.

19 . A network device for communicating with a terminal equipment via a communication network, comprising:

a memory that stores instructions; and

processor circuitry coupled to the memory and configured to execute the instructions to:

receive a BFR MAC CE from the terminal equipment, wherein the BFR MAC CE is generated by the terminal equipment in case where at least one beam failure recovery has been triggered and not cancelled for the TRP and evaluation of candidate beams has been completed, and the BFR MAC CE indicates information for the TRP in which beam failure recovery is triggered.