Method and apparatus for reporting beam failure information
The embodiments of the present disclosure provide a method and an apparatus for reporting beam failure information. The method includes: determining, by a terminal equipment, that it has completed candidate beam detection based on a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) in a secondary cell in which a beam failure occurs; and reporting to a network device that a beam failure occurs in the secondary cell.
1 . An apparatus for reporting beam failure information, comprising:
processor circuitry configured to detect one or more candidate beams; and
a transmitter configured to report a beam failure in a secondary cell in which candidate beam evaluation based on a synchronization signal block or a channel state information reference signal has been completed,
wherein in a case where a highest serving cell index of a serving cell including the secondary cell that is less than 8 for which the beam failure is detected and the candidate beam evaluation has been completed, a beam failure recovery media access control control element of a first format is used, and in a case where the highest serving cell index of a serving cell including the secondary cell that is greater than or equal to 8 for which the beam failure is detected and the candidate beam evaluation has been completed, a beam failure recovery media access control control element of a second format is used,
wherein
the first format includes 1 oct including Ci fields, and
the second format includes 4 octs including Ci fields.
2 . The apparatus according to claim 1 , wherein the transmitter is further configured to perform at least one of:
determine by a media access control entity that the candidate beam evaluation based on a synchronization signal block or a channel state information reference signal has been completed in the secondary cell, and receive one or more candidate beam identifiers of the secondary cell by the media access control entity from a lower layer.
3 . The apparatus according to claim 1 , wherein the transmitter is further configured to:
before the candidate beam evaluation based on a synchronization signal block or a channel state information reference signal has been completed in the secondary cell, or before one or more candidate beam identifiers of the secondary cell from a lower layer are received, or during an evaluation period of candidate beam evaluation based on a synchronization signal block or a channel state information reference signal in the secondary cell, not to report by a media access control entity that the beam failure occurs in the secondary cell.
4 . The apparatus according to claim 3 , wherein the processor circuitry is further configured to, in a case where the secondary cell has triggered beam failure recovery and the beam failure recovery is not cancelled, generate a media access control control element or a truncated media access control control element and assemble a media access control protocol data unit; and the media access control entity does not report in the media access control control element or the truncated media access control control element that the beam failure occurs in the secondary cell.
5 . The apparatus according to claim 4 , wherein the media access control entity sets indication information to which the secondary cell corresponds to be 0 in the media access control control element or the truncated media access control control element, and does not include a field carrying candidate beam information to which the secondary cell corresponds.
6 . The apparatus according to claim 4 , wherein the media access control entity instructs a multiplexing and assembly procedure to generate a beam failure recovery media access control control element, and the beam failure recovery media access control control element or a truncated beam failure recovery media access control control element is generated in the multiplexing and assembly procedure, or
the media access control entity instructs a multiplexing and assembly procedure to generate a truncated beam failure recovery media access control control element, and a beam failure recovery media access control control element or the truncated beam failure recovery media access control control element is generated in the multiplexing and assembly procedure.
7 . The apparatus according to claim 4 , wherein the media access control entity instructs a multiplexing and assembly procedure to generate a media access control control element carrying beam failure and recovery information of a secondary cell, and a beam failure recovery media access control control element or a truncated beam failure recovery media access control control element is generated in the multiplexing and assembly procedure;
and in the multiplexing and assembly procedure, it is determined whether the beam failure recovery media access control control element or the truncated beam failure recovery media access control control element is generated.
8 . The apparatus according to claim 4 , wherein the media access control entity instructs a multiplexing and assembly procedure to generate a beam failure recovery media access control control element, and once an instruction of the media access control entity is received, the beam failure recovery media access control control element is generated in the multiplexing and assembly procedure; or
the media access control entity instructs a multiplexing and assembly procedure to generate a truncated beam failure recovery media access control control element, and once the instruction of the media access control entity is received, the truncated beam failure recovery media access control control element is generated in the multiplexing and assembly procedure.
9 . The apparatus according to claim 4 , wherein in a case where a highest serving cell index that is less than 8 with indication information to which a secondary cell in a media access control entity corresponds set to be 1, a beam failure recovery media access control control element of a first format is used, in a case where the highest serving cell index that is greater than or equal to 8 with indication information set to be 1, a beam failure recovery media access control control element of a second format is used.
10 . The apparatus according to claim 4 , wherein in a case where a highest serving cell index that is less than 8 with indication information to which a secondary cell in a media access control entity corresponds set to be 1, or a beam failure is detected in a special cell and the special cell is to be included in a truncated beam failure recovery media access control control element and an uplink resource is unable to accommodate a truncated beam failure recovery media access control control element of a second format, a truncated beam failure recovery media access control control element of a first format is used; otherwise, a truncated beam failure recovery media access control control element of a second format is used.
11 . The apparatus according to claim 1 , wherein in transmitting a media access control protocol data unit including beam failure information of a secondary cell, beam failure recovery having been triggered on the secondary cell before the media access control protocol data unit is assembled is not cancelled.
12 . The apparatus according to claim 1 , wherein in a case where the secondary cell is configured on a media access control entity, the media access control entity generates a beam failure recovery media access control control element or a truncated beam failure recovery media access control control element for the media access control entity.
13 . The apparatus according to claim 12 , wherein indication information of the beam failure recovery media access control control element is set to be 1 indicates that a beam failure is detected in a secondary cell of a serving cell with an index i configured on the media access control entity and candidate beam information is included; indication information of the beam failure recovery media access control control element is set to be 0 indicates that a secondary cell of a serving cell with an index i is not configured on the media access control entity, or a beam failure is not detected in the secondary cell and candidate beam information is not included;
indication information of the truncated beam failure recovery media access control control element is set to be 1 indicates that a beam failure is detected in a secondary cell of a serving cell with an index i configured on the media access control entity and candidate beam information is included; indication information of the truncated beam failure recovery media access control control element is set to be 0 indicates that a secondary cell of a serving cell with an index i is not configured on the media access control entity, or a beam failure is not detected in the secondary cell and candidate beam information is not included.
14 . The apparatus according to claim 1 , wherein,
before the candidate beam evaluation based on a synchronization signal block or a channel state information reference signal has been completed in the secondary cell,
the processor circuitry is further configured to, in a case where the secondary cell has triggered beam failure recovery and the beam failure recovery is not cancelled, generate a corresponding media access control control element or a truncated media access control control element and assembly a media access control protocol data unit; and the media access control entity does not report in the media access control control element or the truncated media access control control element that a beam failure occurs in the secondary cell,
wherein the media access control entity sets indication information to which the secondary cell corresponds to be 0 in the media access control control element or the truncated media access control control element, and does not include a field carrying candidate beam information to which the secondary cell corresponds.
15 . An apparatus for reporting beam failure information, comprising:
processor circuitry configured to detect one or more candidate beams; and
a transmitter configured to report to a network device a media access control protocol data unit including beam failure information on a secondary cell in which candidate beam evaluation based on a synchronization signal block or a channel state information reference signal has been completed,
wherein in a case where a highest serving cell index of a serving cell including the secondary cell that is less than 8 for which the beam failure is detected and the candidate beam evaluation has been completed, a beam failure recovery media access control control element of a first format is used, and in a case where the highest serving cell index of a serving cell including the secondary cell that is greater than or equal to 8 for which the beam failure is detected and the candidate beam evaluation has been completed, a beam failure recovery media access control control element of a second format is used,
wherein
the first format includes 1 oct including Ci fields, and
the second format includes 4 octs including Ci fields.
16 . The apparatus according to claim 15 , wherein the transmitter is further configured to perform at least one of:
determine by a media access control entity that the candidate beam evaluation based on a synchronization signal block or a channel state information reference signal has been completed in the secondary cell, and receive one or more candidate beam identifiers of the secondary cell by the media access control entity from a lower layer.
17 . The apparatus according to claim 15 , wherein before the candidate beam detection based on a synchronization signal block or a channel state information reference signal has been completed in the secondary cell, or before one or more candidate beam identifiers of the secondary cell from a lower layer are received, or during an evaluation period of the candidate beam evaluation based on a synchronization signal block or a channel state information reference signal in the secondary cell, a media access control entity does not instruct a multiplexing and assembly procedure to generate a beam failure recovery media access control control element or a truncated beam failure recovery media access control control element.
18 . The apparatus according to claim 17 , wherein in a case where at least one piece of beam failure recovery is triggered and is not cancelled and candidate beam evaluation based on a synchronization signal block or a channel state information reference signal in at least one secondary cell is completed, or candidate beam identifiers of at least one secondary cell from a lower layer are received, according to an uplink resource, the media access control entity instructs the multiplexing and assembly procedure to generate a beam failure recovery media access control control element or a truncated beam failure recovery media access control control element, or triggers a scheduling request.