Link recovery method and apparatus
Example link recovery methods and apparatus are described. One example method includes determining a link failure of a first control resource set, where the first control resource set is a control resource set configured by a first master information block MIB. A link failure recovery request is sent, where the link failure recovery request is used to request to recover a communication link of the first control resource set. The first control resource set may be a control resource set (CORESET), a control region, or an enhanced physical downlink control channel (ePDCCH) set defined in a 5G mobile communications system.
1. A link recovery method, comprising:
determining a link failure of a first control resource set (CORESET) with index 0 , wherein the first CORESET with index 0 is associated with a first synchronization signal block (SSB);
determining a second SSB from a reference signal resource set, wherein a signal quality of the second SSB is greater than or equal to a threshold;
sending a link failure recovery request, wherein the link failure recovery request comprises information indicating the second SSB, wherein the link failure recovery request is used to request to recover a communication link of a CORESET with index 0 based on the second SSB,
identifying a second CORESET with index 0 associated with the second SSB indicated by the link failure recovery request; and
identifying, on the second CORESET with index 0 , downlink control information (DCI) in a common search space (CSS) set associated with a CORESET with index 0 .
2. The method according to claim 1 , wherein identifying the DCI comprises:
identifying the DCI using quasi co-location (QCL) information associated with the second SSB.
3. The method according to claim 1 , wherein sending the link failure recovery request comprises:
sending the link failure recovery request on a physical random access channel (PRACH), wherein the PRACH is associated with the second SSB.
4. The method according to claim 1 , wherein a cyclic redundancy check (CRC) of the DCI is scrambled by cell radio network temporary identifier (C-RNTI).
5. A link recovery method, comprising:
receiving a link failure recovery request, wherein the link failure recovery request comprises information indicating a second SSB, wherein the link failure recovery request is used to request to recover a communication link of a control resource set (CORESET) with index 0 based on the second SSB;
determining a second CORESET with index 0 based on the link failure recovery request, wherein the second CORESET with index 0 is associated with the second SSB indicated by the link failure recovery request; and
sending, on the second CORESET with index 0 , downlink control information (DCI) in a common search space (CSS) set associated with a CORESET with index 0 .
6. The method according to claim 5 , wherein sending the DCI comprises:
sending the DCI using quasi co-location (QCL) information associated with the second SSB.
7. The method according to claim 5 , wherein receiving the link failure recovery request comprises:
receiving the link failure recovery request on a physical random access channel (PRACH), wherein the PRACH is associated with the second SSB.
8. The method according to claim 5 , wherein a cyclic redundancy check (CRC) of the DCI is scrambled by cell radio network temporary identifier (C-RNTI).
9. A link recovery apparatus, comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the memory storage, wherein the instructions, when executed by the one or more processors, cause the apparatus to:
determine a link failure of a first control resource set (CORESET) with index 0 , wherein the first CORESET with index 0 is associated with a first synchronization signal block (SSB);
determine a second SSB from a reference signal resource set, wherein a signal quality of the second SSB is greater than or equal to a threshold;
send a link failure recovery request, wherein the link failure recovery request comprises information indicating the second SSB, wherein the link failure recovery request is used to request to recover a communication link of a CORESET with index 0 based on the second SSB;
identify a second CORESET with index 0 associated with the second SSB indicated by the link failure recovery request; and
identify, on the second CORESET with index 0 , downlink control information (DCI) in a common search space (CSS) set associated with a CORESET with index 0 .
10. The apparatus according to claim 9 , wherein the instructions, when executed by the one or more processors, further cause the apparatus to:
identify the DCI using quasi co-location (QCL) information associated with the second SSB.
11. The apparatus according to claim 9 , wherein the instructions, when executed by the one or more processors, cause the apparatus to:
send the link failure recovery request on a physical random access channel (PRACH), wherein the PRACH is associated with the second SSB.
12. The apparatus according to claim 9 , wherein a cyclic redundancy check (CRC) of the DCI is scrambled by cell radio network temporary identifier (C-RNTI).
13. A link recovery apparatus, comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the memory storage, wherein the instructions, when executed by the one or more processors, cause the apparatus to:
receive a link failure recovery request, wherein the link failure recovery request comprises information indicating a second SSB, and wherein the link failure recovery request is used to request to recover a communication link of a control resource set (CORESET) with index 0 based on the second SSB;
determine a second CORESET with index 0 based on the link failure recovery request, wherein the second CORESET with index 0 is associated with the second SSB indicated by the link failure recovery request; and
send, on the second CORESET with index 0 , downlink control information (DCI) in a common search space (CSS) set associated with a CORESET with index 0 .
14. The apparatus according to claim 13 , wherein the instructions, when executed by the one or more processors, cause the apparatus to:
send the DCI using quasi co-location (QCL) information associated with the second SSB.
15. The apparatus according to claim 13 , wherein the instructions, when executed by the one or more processors, cause the apparatus to:
receive the link failure recovery request on a physical random access channel (PRACH), wherein the PRACH is associated with the second SSB.
16. The apparatus according to claim 13 , wherein a cyclic redundancy check (CRC) of the DCI is scrambled by cell radio network temporary identifier (C-RNTI).