Transmission and reception point configuration for beam failure recovery
Wireless communications may comprise communications between a base station and a wireless device. A wireless device may perform beam failure recovery (BFR). Based on an indication of completion of the BFR, the wireless device may determine resources for transmission of uplink signals.
1. A method comprising:
receiving, by a wireless device, one or more messages comprising one or more configuration parameters for a downlink bandwidth part (BWP) of a cell, wherein the one or more configuration parameters indicate:
two control resource set (CORESET) group indexes;
one or more first reference signals (RSs) for beam failure detection; and
one or more second RSs for beam failure recovery (BFR);
transmitting, based on detecting a beam failure for the one or more first RSs, a BER medium access control (MAC) control element (CE) for a BFR procedure, wherein the BFR MAC CE indicates a candidate RS among the one or more second RSs;
completing the BFR procedure successfully based on a physical downlink control channel (PDCCH) reception with a downlink control information (DCI) format indicating an uplink grant; and
monitoring, after a number of symbols from a last symbol of the PDCCH reception, PDCCH using antenna port quasi-collocation parameters corresponding to:
the candidate RS in a first CORESET with a first CORESET group index of the two CORESET group indexes; and
an RS, indicated by a transmission configuration indication (TCI) state, in a second CORESET with a second CORESET group index of the two CORESET group indexes.
2. The method of claim 1 , further comprising not monitoring, after the number of symbols from the last symbol of the PDCCH reception, the PDCCH using antenna port quasi-collocation parameters corresponding to the candidate RS in the second CORESET with the second CORESET group index.
3. The method of claim 1 , wherein the one or more first RSs are associated with the first CORESET group index.
4. The method of claim 1 , wherein a radio link quality of the candidate RS is equal to, or greater than, a threshold.
5. The method of claim 1 , wherein the one or more configuration parameters indicate:
the first CORESET group index for one or more first CORESETs in the downlink BWP of the cell, wherein the one or more first CORESETs comprise the first CORESET; and
the second CORESET group index for one or more second CORESETs in the downlink BWP of the cell, wherein the one or more second CORESETs comprise the second CORESET.
6. The method of claim 1 , further comprising receiving a MAC CE indicating activation of the TCI state for the second CORESET.
7. The method of claim 1 , wherein a cyclic redundancy check (CRC) of the DCI format is scrambled by C-RNTI.
8. The method of claim 1 , further comprising transmitting, after the number of symbols from the last symbol of the PDCCH reception and via a first physical uplink control channel (PUCCH) resource associated with the first CORESET group index of the two CORESET group indexes, a first PUCCH transmission.
9. The method of claim 8 , wherein the first PUCCH transmission is transmitted using:
a first transmission power determined based on a downlink pathloss estimate of the candidate reference signal; and
a first spatial domain filter that is associated with the candidate RS.
10. The method of claim 9 , further comprising transmitting, after completing the BFR procedure successfully and via a second PUCCH resource associated with the second CORESET group index of the two CORESET group indexes, a second PUCCH transmission.
11. The method of claim 10 , wherein the second PUCCH transmission is transmitted using:
a second transmission power determined based on a downlink pathloss estimate of a reference signal indicated by a spatial relation of the second PUCCH resource; and
a second spatial domain filter that is determined based on a spatial domain filter of a reference signal indicated by a spatial relation of the second PUCCH resource.
12. The method of claim 11 , further comprising receiving an activation command indicating activation of the spatial relation for the second PUCCH resource.
13. The method of claim 1 , wherein the number of symbols is 28 symbols.
14. The method of claim 1 , wherein:
at least one demodulation reference signal (DM-RS) port of the PDCCH in the first CORESET is quasi-collocated with the candidate reference signal; and
at least one DM-RS port of the PDCCH in the second CORESET is quasi-collocated with the RS indicated by the TCI state.
15. The method of claim 1 , further comprising:
transmitting, based on detecting a second beam failure, a second BFR MAC CE for a second BFR procedure, wherein the second BFR MAC CE indicates a second candidate RS among one or more RSs for BFR associated with the second CORESET group index;
completing the second BFR procedure successfully based a second PDCCH reception with the DCI format indicating a second uplink grant; and
monitoring, after the number of symbols from a last symbol of the second PDCCH reception, the PDCCH in the second CORESET using antenna port quasi-collocation parameters corresponding to the second candidate RS.
16. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive one or more messages comprising one or more configuration parameters for a downlink bandwidth part (BWP) of a cell, wherein the one or more configuration parameters indicate:
two control resource set (CORESET) group indexes;
one or more first reference signals (RSs) for beam failure detection; and
one or more second RSs for beam failure recovery (BFR);
transmit, based on detecting a beam failure for the one or more first RSs, a BFR medium access control (MAC) control element (CE) for a BFR procedure, wherein the BFR MAC CE indicates a candidate RS among the one or more second RSs;
complete the BFR procedure successfully based on a physical downlink control channel (PDCCH) reception with a downlink control information (DCI) format indicating an uplink grant; and
monitor, after a number of symbols from a last symbol of the PDCCH reception, PDCCH using antenna port quasi-collocation parameters corresponding to:
the candidate RS in a first CORESET with a first CORESET group index of the two CORESET group indexes; and
an RS, indicated by a transmission configuration indication (TCI) state, in a second CORESET with a second CORESET group index of the two CORESET group indexes.
17. The wireless device of claim 16 , wherein the instructions further cause the wireless device to not monitor, after the number of symbols from the last symbol of the PDCCH reception, the PDCCH using antenna port quasi-collocation parameters corresponding to the candidate RS in the second CORESET with the second CORESET group index.
18. The wireless device of claim 16 , wherein the one or more first RSs are associated with the first CORESET group index.
19. The wireless device of claim 16 , wherein a radio link quality of the candidate RS is equal to, or greater than, a threshold.
20. The wireless device of claim 16 , wherein the one or more configuration parameters indicate:
the first CORESET group index for one or more first CORESETs in the downlink BWP of the cell, wherein the one or more first CORESETs comprise the first CORESET; and
the second CORESET group index for one or more second CORESETs in the downlink BWP of the cell, wherein the one or more second CORESETs comprise the second CORESET.
21. The wireless device of claim 16 , wherein the instructions further cause the wireless device to receive a MAC CE indicating activation of the TCI state for the second CORESET.
22. The wireless device of claim 16 , wherein a cyclic redundancy check (CRC) of the DCI format is scrambled by C-RNTI.
23. The wireless device of claim 16 , wherein the instructions further cause the wireless device to transmit, after the number of symbols from the last symbol of the PDCCH reception and via a first physical uplink control channel (PUCCH) resource associated with the first CORESET group index of the two CORESET group indexes, a first PUCCH transmission.
24. The wireless device of claim 23 , wherein the first PUCCH transmission is transmitted using:
a first transmission power determined based on a downlink pathloss estimate of the candidate reference signal; and
a first spatial domain filter that is associated with the candidate RS.
25. The wireless device of claim 24 , wherein the instructions further cause the wireless device to transmit, after completing the BER procedure successfully and via a second PUCCH resource associated with the second CORESET group index of the two CORESET group indexes, a second PUCCH transmission.
26. The wireless device of claim 25 , wherein the second PUCCH transmission is transmitted using:
a second transmission power determined based on a downlink pathloss estimate of a reference signal indicated by a spatial relation of the second PUCCH resource; and
a second spatial domain filter that is determined based on a spatial domain filter of a reference signal indicated by a spatial relation of the second PUCCH resource.
27. The wireless device of claim 26 , wherein the instructions further cause the wireless device to receive an activation command indicating activation of the spatial relation for the second PUCCH resource.
28. The wireless device of claim 16 , wherein the number of symbols is 28 symbols.
29. The wireless device of claim 16 , wherein:
at least one demodulation reference signal (DM-RS) port of the PDCCH in the first CORESET is quasi-collocated with the candidate reference signal; and
at least one DM-RS port of the PDCCH in the second CORESET is quasi-collocated with the RS indicated by the TCI state.
30. The wireless device of claim 16 , wherein the instructions further cause the wireless device to:
transmit, based on detecting a second beam failure, a second BFR MAC CE for a second BFR procedure, wherein the second BFR MAC CE indicates a second candidate RS among one or more RSs for BFR associated with the second CORESET group index;
complete, the second BFR procedure successfully based a second PDCCH reception with the DCI format indicating a second uplink grant; and
monitor, after the number of symbols from a last symbol of the second PDCCH reception, the PDCCH in the second CORESET using antenna port quasi-collocation parameters corresponding to the second candidate RS.