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1. WO2021067102 - BEAM FAILURE DETECTION REFERENCE SIGNAL FOR A SECONDARY CELL

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[ EN ]

CLAIMS

1. A method of wireless communication by a user equipment (UE), comprising: determining at least one reference signal (RS) associated with a first cell that is configured without a control-resource set (CORESET);

monitoring the at least one RS associated with the first cell; and

detecting a beam failure on the first cell based on the monitoring of the at least one RS.

2. The method of claim 1, wherein the determining the at least one RS is based on one or more transmission configuration indicator (TCI) states associated with the first cell.

3. The method of claim 2, wherein the determining the at least one RS further comprises identifying the one or more TCI states among a plurality of TCI states associated with the first cell based on one or more identifier values associated with the plurality of TCI states.

4. The method of claim 3, wherein the identifying the one or more TCI states comprises identifying two or more TCI states having a lowest and a second lowest identifier values among the one or more identifier values associated with the plurality of TCI states.

5. The method of claim 2, wherein the determining the at least one RS further comprises identifying RSs associated with the one or more TCI states based on periodicities of the RSs, and identifying the RSs as the at least one RS.

6. The method of claim 2, further comprising:

receiving transmissions from a base station via the first cell, and wherein the determining the at least one RS further comprises identifying the one or more TCI states associated with the transmissions.

7. The method of claim 2, wherein the one or more TCI states indicate at least one quasi-colocation (QCL) relationship associated with a physical downlink shared channel (PDSCH) on the first cell.

8. The method of claim 7, wherein the at least one QCL relationship comprises a spatial reception parameter associated with the PDSCH.

9. The method of claim 3, further comprising

receiving a configuration of the first cell, and wherein determining the at least one RS further comprises identifying the one or more TCI states among the plurality of TCI states based on the configuration of the first cell if the first cell is configured without a TCI state associated with the at least one RS.

10. The method of claim 1, further comprising:

receiving one or more indications of one or more TCI states associated with at least one beam failure detection (BFD) RS, wherein the at least one BFD RS is associated with the first cell configured without the CORESET, and wherein the determination of the at least one BFD RS is based on the one or more indications associated with the one or more TCI states.

11. The method of claim 10, wherein the one or more TCI states are associated with a PDSCH on the first cell.

12. The method of claim 10, wherein the one or more TCI states indicate at least one QCL relationship associated with a PDSCH on the first cell.

13. The method of claim 10, wherein the one or more indications are received via at least one of a radio resource control (RRC) configuration message, a medium access control (MAC) control element (CE), downlink control information (DCI), or a combination thereof.

14. The method of claim 13, wherein the RRC configuration message indicates a beam failure recovery configuration.

15. The method of claim 13, wherein the RRC configuration message indicates that the first cell is configured without the CORESET.

16. The method of claim 1, further comprising communicating, with a base station, via the first cell and one or more second cells, wherein the first cell is a secondary cell in a cell group and the one or more second cells comprises a primary cell in the cell group configured with the CORESET.

17. The method of claim 16, further comprising:

receiving, from the base station on the one or more second cells, signaling for cross-carrier scheduling of transmissions on the first cell.

18. A method of wireless communication by a base station, comprising:

determining one or more transmission configuration indicator (TCI) states associated with at least one reference signal (RS) of a first cell that is configured without a control -re source set (CORESET);

transmitting, to a user equipment (UE), one or more indications of the one or more TCI states; and

receiving an indication of a beam failure associated with the at least one RS of the first cell.

19. The method of claim 18, wherein the one or more TCI states are associated with a physical downlink shared channel (PDSCH) on the first cell.

20. The method of claim 18, wherein the one or more TCI states indicates at least one quasi-colocation (QCL) relationship associated with a PDSCH on the first cell.

21. The method of claim 18, wherein the one or more indications are transmitted via at least one of a radio resource control (RRC) configuration message, a medium access control (MAC) control element (CE), downlink control information (DCI), or a combination thereof.

22. The method of claim 21, wherein the RRC configuration message indicates a beam failure recovery configuration.

23. The method of claim 21, wherein the RRC configuration message indicates that the first cell is configured without the CORESET.

24. The method of claim 18, wherein the one or more indications of the one or more TCI states are associated with at least one beam failure detection (BFD) RS, wherein the at least one BFD RS is associated with the first cell configured without the CORESET.

25. The method of claim 18, further comprising:

communicating, with the UE, via the first cell and one or more second cells, wherein the first cell is a secondary cell in a cell group and the one or more second cells comprises a primary cell in the cell group configured with the CORESET; and transmitting, to the UE on the one or more second cells, signaling for cross carrier scheduling of transmissions on the first cell.

26. An apparatus for wireless communication, comprising:

a memory;

a processor coupled to the memory, the processor and the memory configured to determine at least one reference signal (RS) associated with a first cell that is configured without a control -re source set (CORESET); and

a receiver configured to monitor the at least one RS associated with the first cell; wherein the processor and the memory are further configured to detect a beam failure on the first cell based on the monitoring of the at least one RS.

27. The apparatus for claim 26, wherein the processor and the memory are further configured to determine the at least one RS based on one or more transmission configuration indicator (TCI) states associated with the first cell.

28. The apparatus for claim 26, wherein:

the receiver is further configured to receive one or more indications of one or more TCI states associated with at least one beam failure detection (BFD) RS, wherein the at least one BFD RS is associated with the first cell configured without the CORESET; and

the processor and the memory are further configured to determine the at least one BFD RS based on the one or more indications associated with the one or more TCI states.

29. An apparatus for wireless communication, comprising:

a memory;

a processor coupled to the memory, the processor and the memory configured to determine one or more transmission configuration indicator (TCI) states associated with at least one reference signal (RS) of a first cell that is configured without a control-resource set (CORESET);

a transmitter configured to transmit to a user equipment (UE) one or more indications of the one or more TCI states; and

a receiver configured to receive an indication of a beam failure associated with the at least one RS of the first cell.

30. The apparatus of claim 29, wherein the one or more TCI states are associated with a physical downlink shared channel (PDSCH) on the first cell.