Beam failure recovery method and apparatus
This application provides a beam failure recovery method and an apparatus. The method includes: A terminal device receives configuration information of a cell, where the configuration information of the cell includes M beam failure detection resource groups and M candidate beam resource groups, the M beam failure detection resource groups are in a one-to-one correspondence with the M candidate beam resource groups, and M is an integer. When M is an integer greater than 1, and a beam failure occurs in at least one of the M beam failure detection resource groups, the terminal device sends, by using a first media access control control element (MAC CE), beam failure recovery information corresponding to the cell. According to the beam failure recovery method provided in this application, beam failure recovery can be performed in time.
1 . A beam failure recovery method performed by a terminal device or a chip of a terminal device, wherein the method comprises:
receiving configuration information of a cell, wherein the configuration information of the cell comprises two beam failure detection resource groups and two candidate beam resource groups, the two beam failure detection resource groups are in a one-to-one correspondence with the two candidate beam resource groups; and
sending, by using a first medium access control control element (MAC CE), beam failure recovery information corresponding to the cell in response to a beam failure occurring in at least one of the two M beam failure detection resource groups, wherein:
the first MAC CE comprises a bitmap, one bit in the bitmap corresponds to one cell, and the one bit indicates whether a beam failure occurs in the one cell,
when a beam failure occurs in the one cell corresponding to the one bit, the one cell corresponds to one or two separate octets in the first MAC CE, and
the first MAC CE further comprises a first field separate from the one bit, and the first field indicates whether the one cell corresponds to one or two separate octets in the first MAC CE.
2 . The method according to claim 1 , wherein each octet in the one or two octets comprises a second field, and
the second field indicates information about a beam failure detection resource group in which the beam failure occurs.
3 . The method according to claim 2 , wherein when the first field indicates that the one bit corresponds to one octet, the second field indicates the information about the beam failure detection resource group in which the beam failure occurs; or
wherein the second field is reserved when the first field indicates that the one bit corresponds to two octets.
4 . The method according to claim 1 , wherein each of the one or two octets further comprises one third field, and the third field indicates a beam failure detection resource group corresponding to the octet.
5 . The method according to claim 1 , wherein each of the one or two octets further comprises one fourth field, and
the fourth field indicates whether there is a candidate beam or candidate beam resource meeting a quality requirement in the candidate beam resource group corresponding to the octet.
6 . The method according to claim 1 , wherein each of the one or two octets further comprises one fifth field, and
the fifth field indicates information about the candidate beam or candidate beam resource that meets a quality requirement and that is in the candidate beam resource group corresponding to the octet.
7 . The method according to claim 1 , wherein a logical channel identifier corresponding to the first MAC CE is any one of the following logical channel identifiers: 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, or 47.
8 . A communication apparatus, comprising:
at least one processor, and a memory, the memory comprising instructions that, when executed by the processor, cause the communication apparatus to:
receive configuration information of a cell, wherein the configuration information of the cell comprises two beam failure detection resource groups and two candidate beam resource groups, the two beam failure detection resource groups are in a one-to-one correspondence with the two candidate beam resource groups;
detect a beam failure in at least one of the two beam failure detection resource groups; and
send, by using a first medium access control control element (MAC CE), beam failure recovery information corresponding to the cell in response to the detecting a beam failure, wherein:
the first MAC CE comprises a bitmap, one bit in the bitmap corresponds to one cell, and the one bit indicates whether a beam failure occurs in the one cell,
when a beam failure occurs in the one cell corresponding to the one bit, the one cell corresponds to one or two separate octets in the first MAC CE, and
the first MAC CE further comprises a first field separate from the one bit, and the first field indicates whether the one cell corresponds to one or two separate octets in the first MAC CE.
9 . The communication apparatus according to claim 8 , wherein each octet in the one or two octets comprises a second field, and
the second field indicates information about a beam failure detection resource group in which the beam failure occurs.
10 . The communication apparatus according to claim 9 , wherein when the first field indicates that the one bit corresponds to one octet, the second field indicates the information about the beam failure detection resource group in which the beam failure occurs; or
wherein the second field is reserved when the first field indicates that the one bit corresponds to two octets.
11 . The communication apparatus according to claim 8 , wherein each of the one or two octets further comprises one third field, and the third field indicates a beam failure detection resource group corresponding to the octet.
12 . The communication apparatus according to claim 8 , wherein each of the one or two octets further comprises one fourth field, and
the fourth field indicates whether there is a candidate beam or candidate beam resource meeting a quality requirement in the candidate beam resource group corresponding to the octet.
13 . The communication apparatus according to claim 8 , wherein each of the one or two octets further comprises one fifth field, and
the fifth field indicates information about a candidate beam or candidate beam resource that meets a quality requirement and that is in the candidate beam resource group corresponding to the octet.
14 . The communication apparatus terminal device according to claim 8 , wherein a logical channel identifier corresponding to the first MAC CE is any one of the following logical channel identifiers: 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, or 47.
15 . A computer readable medium (CRM) containing non-transitory computer instructions, that when executed by at least one processor of an apparatus, causes the apparatus to perform the steps comprising:
receiving configuration information of a cell, wherein the configuration information of the cell comprises two beam failure detection resource groups and two candidate beam resource groups, the two beam failure detection resource groups are in a one-to-one correspondence with the two candidate beam resource groups; and
sending, by using a first medium access control control element (MAC CE), beam failure recovery information corresponding to the cell in response to a beam failure occurring in at least one of the two beam failure detection resource groups, wherein:
the first MAC CE comprises a bitmap, one bit in the bitmap corresponds to one cell, and the one bit indicates whether a beam failure occurs in the one cell,
when a beam failure occurs in the one cell corresponding to the one bit, the one cell corresponds to one or two separate octets in the first MAC CE, and
the first MAC CE further comprises a first field separate from the one bit, and the first field indicates whether the one cell corresponds to one or two separate octets in the first MAC CE.
16 . The computer readable medium according to claim 15 , wherein each octet in the one or two octets comprises a second field, and
the second field indicates information about a beam failure detection resource group in which the beam failure occurs.
17 . The computer readable medium according to claim 16 , wherein when the first field indicates that the one bit corresponds to one octet, the second field indicates the information about the beam failure detection resource group in which the beam failure occurs; or
wherein the second field is reserved when the first field indicates that the one bit corresponds to two octets.
18 . The computer readable medium according to claim 15 , wherein each of the one or two octets further comprises one third field, and the third field indicates a beam failure detection resource group corresponding to the octet.
19 . The computer readable medium according to claim 15 , wherein each of the one or two octets further comprises one fourth field, and
the fourth field indicates whether there is a candidate beam or candidate beam resource meeting a quality requirement in the candidate beam resource group corresponding to the octet.
20 . The computer readable medium according to claim 15 , wherein each of the one or two octets further comprises one fifth field, and
the fifth field indicates information about a candidate beam or candidate beam resource that meets a quality requirement and that is in the candidate beam resource group corresponding to the octet.