Method and apparatus for reporting beam failure-related information

1 . An apparatus for reporting beam failure-related information, the apparatus being applicable to a terminal, and the apparatus comprising:

first processor circuitry configured to generate a beam failure recovery Medium Access Control Control Element (BFR MAC CE) containing beam failure-related information; and

a first transmitter configured to transmit the beam failure recovery MAC CE to a network device to report the beam failure-related information,

wherein in the beam failure-related information of the beam failure recovery MAC CE, when octet(s) indicating beam failure recovery information for Beam Failure Detection Reference Signal (BFD-RS) set(s) are present, the octet(s) indicating the beam failure recovery information for BFD-RS set(s) occur based on an ascending order of serving cell indices of secondary cells, or based on an ascending order of BFD-RS set identifiers or indices and an ascending order of serving cell indices of secondary cells,

when random access procedure is initiated in case beam failure recovery is triggered for two BFD-RS sets of a special cell, the BFD-RS sets of the special cell are to be indicated in the BFR MAC CE and a result of a logical channel optimization procedure (LCP) is that Uplink Shared Channel (UL-SCH) resources available for transmission are insufficient for accommodating a BFR MAC CE containing a first bitmap of 4 octets plus its header, a BFR MAC CE containing a first bitmap of 1 octet and a second bitmap of 1 octet is used to report the beam failure-related information, the first bitmap indicates a serving cell where a BFD-RS set beam failure is detected.

2 . The apparatus according to claim 1 , wherein,

in the beam failure-related information of the beam failure recovery MAC CE, when octet(s) of a special cell indicating beam failure recovery information for BFD-RS set(s) are present, the octet(s) indicating the beam failure recovery information for BFD-RS set(s) of the special cell occur earlier than octet(s) of the secondary cells indicating the beam failure recovery information for BFD-RS set(s).

3 . The apparatus according to claim 1 , wherein,

when two BFD-RS sets of the special cell trigger beam failure recovery and the beam failure recovery has not been successfully completed, the terminal initiates a random access procedure on the special cell, and the beam failure-related information is reported to the network device during the random access procedure.

4 . The apparatus according to claim 1 , wherein,

when the octet(s) indicating beam failure recovery information for BFD-RS set(s) are present, the octet(s) indicating beam failure recovery information for BFD-RS set(s) occur based on an ascending order of serving cell indices of the secondary cell, wherein,

octet(s) indicating beam failure recovery information for BFD-RS set(s) of secondary cells with smaller serving cell indices or associated with the secondary cells with smaller serving cell indices occur first, and then octet(s) indicating beam failure recovery information for BFD-RS set(s) of secondary cells with larger serving cell indices or associated with secondary cells with larger serving cell indices occur.

5 . The apparatus according to claim 1 , wherein,

when the octet(s) indicating the beam failure recovery information for BFD-RS set(s) are present, the octet(s) indicating the beam failure recovery information for BFD-RS set(s) occur based on an ascending order of BFD-RS set identifiers or indices and an ascending order of the serving cell indices of the secondary cell, wherein,

after all the octet(s) indicating the beam failure recovery information for BFD-RS set(s) of the secondary cells with smaller serving cell indices or associated with the secondary cells with smaller serving cell indices occur, the octet(s) indicating beam failure recovery information for BFD-RS set(s) of the secondary cells with larger serving cell indices or associated with the secondary cells with larger serving cell indices occur, or,

after all octet(s) indicating the beam failure recovery information for BFD-RS set(s) of smaller BFD-RS set identifiers or indices occur, octet(s) indicating beam failure recovery information for BFD-RS set(s) of larger BFD-RS set identifiers or indices occur.

6 . The apparatus according to claim 1 , wherein,

the second bitmap being comprised in a next octet of the first bitmap.

7 . The apparatus according to claim 6 , wherein,

the second bitmap indicates the number of BFD-RS set(s) where a BFD-RS set beam failure is detected on the serving cell.

8 . The apparatus according to claim 7 , wherein,

the serving cell is a serving cell where a BFD-RS set beam failure is detected.

9 . The apparatus according to claim 1 , wherein,

the beam failure recovery MAC CE is an enhanced beam failure recovery MAC CE (enhanced BFR MAC CE) or an enhanced truncated beam failure recovery MAC CE (enhanced truncated BFR MAC CE).

10 . An apparatus for receiving beam failure-related information, the apparatus being applicable to a network device, and the apparatus comprising:

a first receiver configured to receive a beam failure recovery Medium Access Control Control Element (BFR MAC CE) containing beam failure-related information from a terminal,

wherein in the beam failure-related information of the beam failure recovery MAC CE, when octet(s) indicating beam failure recovery information for Beam Failure Detection Reference Signal (BFD-RS) set(s) are present, the octet(s) indicating the beam failure recovery information for BFD-RS set(s) occur based on an ascending order of serving cell indices of secondary cells, or based on an ascending order of BFD-RS set identifiers or indices and an ascending order of serving cell indices of secondary cells,

when random access procedure is initiated in case beam failure recovery is triggered for two BFD-RS sets of a special cell, the BFD-RS sets of the special cell are to be indicated in the BFR MAC CE and a result of a logical channel optimization procedure (LCP) is that Uplink Shared Channel (UL-SCH) resources available for transmission are insufficient for accommodating a BFR MAC CE containing a first bitmap of 4 octets plus its header, a BFR MAC CE containing a first bitmap of 1 octet and a second bitmap of 1 octet is used to report the beam failure-related information, the first bitmap indicates a serving cell where a BFD-RS set beam failure is detected.

11 . A communication system, comprising a terminal and/or a network device,

the terminal comprising an apparatus for reporting beam failure-related information, the apparatus being applicable to a terminal, and the apparatus comprising:

first processor circuitry configured to generate a beam failure recovery Medium Access Control Control Element (BFR MAC CE) containing beam failure-related information; and

a first transmitter configured to transmit the beam failure recovery MAC CE to a network device to report the beam failure-related information,

wherein in the beam failure-related information of the beam failure recovery MAC CE, when octet(s) indicating beam failure recovery information for Beam Failure Detection Reference Signal (BFD-RS) set(s) are present, the octet(s) indicating the beam failure recovery information for BFD-RS set(s) occur based on an ascending order of serving cell indices of secondary cells, or based on an ascending order of BFD-RS set identifiers or indices and an ascending order of serving cell indices of secondary cells,

when random access procedure is initiated in case beam failure recovery is triggered for two BFD-RS sets of a special cell, the BFD-RS sets of the special cell are to be indicated in the BFR MAC CE and a result of a logical channel optimization procedure (LCP) is that Uplink Shared Channel (UL-SCH) resources available for transmission are insufficient for accommodating a BFR MAC CE containing a first bitmap of 4 octets plus its header, a BFR MAC CE containing a first bitmap of 1 octet and a second bitmap of 1 octet is used to report the beam failure-related information, the first bitmap indicates a serving cell where a BFD-RS set beam failure is detected, and

the network device comprising an apparatus for receiving beam failure-related information, the apparatus being applicable to a network device, and the apparatus comprising:

a first receiver configured to receive a beam failure recovery MAC CE containing beam failure-related information from a terminal,

wherein in the beam failure-related information of the beam failure recovery MAC CE, when octet(s) indicating beam failure recovery information for BFD-RS set(s) are present, the octet(s) indicating the beam failure recovery information for BFD-RS set(s) occur based on an ascending order of serving cell indices of secondary cells, or based on an ascending order of BFD-RS set identifiers or indices and an ascending order of serving cell indices of secondary cells,

when random access procedure is initiated in case beam failure recovery is triggered for two BFD-RS sets of a special cell, the BFD-RS sets of the special cell are to be indicated in the BFR MAC CE and a result of a logical channel optimization procedure (LCP) is that UL-SCH resources available for transmission are insufficient for accommodating a BFR MAC CE containing a first bitmap of 4 octets plus its header, a BFR MAC CE containing a first bitmap of 1 octet and a second bitmap of 1 octet is used to report the beam failure-related information, the first bitmap indicates a serving cell where a BFD-RS set beam failure is detected.