Beam failure recovery
Systems, apparatuses, and methods are described for wireless communications. A wireless device may inform a base station of a failure of a beam failure recovery procedure for a secondary cell. The wireless device may include an indicator of the failure in a report providing, or configured to provide, values for signal strength or other characteristic of a downlink signal. The indicator may be in addition to, and/or may replace, one or more indicators of signal strength or other characteristic.
1. A method comprising:
receiving, by a wireless device, at least one configuration parameter that indicates at least one reference signal (RS);
determining a beam failure associated with a secondary cell;
determining that a beam failure recovery (BFR) procedure associated with the secondary cell is unsuccessful; and
sending, via a physical uplink control channel (PUCCH), at least one message comprising:
at least one field associated with the at least one RS, and
at least one measurement field comprising a first value that indicates the unsuccessful BFR procedure associated with the secondary cell.
2. The method of claim 1 , wherein the at least one measurement field further comprises at least one indicator of a value of a layer-1 reference signal received power (L1-RSRP) of the at least one RS.
3. The method of claim 1 , wherein the at least one field comprises a value indicating the at least one RS.
4. The method of claim 1 , wherein the PUCCH is associated with at least one of:
a primary cell; or
another secondary cell different from the secondary cell.
5. The method of claim 1 , further comprising stopping, by the wireless device and based on the unsuccessful BFR procedure, at least one of:
uplink transmissions via the secondary cell; or
monitoring of at least one downlink physical channel associated with the secondary cell.
6. The method of claim 5 , wherein the at least one configuration parameter further indicates a cell deactivation timer associated with the secondary cell, and wherein the stopping comprises stopping before expiration of the cell deactivation timer.
7. The method of claim 1 , wherein the determining that the BFR procedure associated with the secondary cell is unsuccessful is based on at least one of:
an expiration of a BFR timer associated with the secondary cell, or
sending of a maximum quantity of uplink signals for the BFR procedure.
8. The method of claim 1 , wherein the at least one RS comprises a plurality of RSs, and wherein the at least one field comprises a plurality of fields associated with the plurality of RSs.
9. The method of claim 1 , wherein the at least one RS comprises at least one of:
an RS of a primary cell; or
an RS of the secondary cell.
10. A method comprising:
receiving, by a wireless device, at least one configuration parameter that indicates at least one field associated with a measurement value associated with at least a first downlink signal;
determining that a beam failure recovery (BFR) procedure associated with a secondary cell is unsuccessful; and
sending, via a physical uplink control channel (PUCCH), at least one message comprising, in the at least one field, at least one indicator of the unsuccessful BFR procedure.
11. The method of claim 10 , wherein the at least one message comprises, for a second downlink signal, an indicator of a measurement value associated with the second downlink signal.
12. The method of claim 10 , wherein the PUCCH is associated with at least one of:
a primary cell; or
another secondary cell different from the secondary cell.
13. The method of claim 10 , further comprising stopping, by the wireless device and based on the unsuccessful BFR procedure, uplink transmissions via the secondary cell.
14. A method comprising:
determining, by a wireless device, that a beam failure recovery (BFR) procedure associated with a secondary cell is unsuccessful;
discontinuing, by the wireless device, based on the unsuccessful BFR procedure, and before expiration of a secondary cell deactivation timer associated with the secondary cell, at least one of:
monitoring at least one downlink physical channel associated with the secondary cell, or
uplink transmissions via the secondary cell; and
sending, via a physical uplink control channel (PUCCH), at least one message comprising, in at least one measurement field:
at least one indicator of the unsuccessful BFR procedure, and
at least one indicator of a measurement value associated with at least one reference signal (RS).
15. The method of claim 14 , further comprising receiving, by the wireless device, at least one configuration parameter that indicates the at least one RS.
16. The method of claim 14 , wherein the at least one indicator of the measurement value comprises at least one indicator of a value of a layer-1 reference signal received power (L1-RSRP) of the at least one RS.
17. The method of claim 14 , wherein the at least one indicator of the unsuccessful BFR procedure comprises at least one indicator of a reserved value of a plurality of layer-1 reference signal received power (L1-RSRP) values.
18. The method of claim 14 , wherein a first measurement field of the at least one message comprises the at least one indicator of the unsuccessful BFR procedure, and wherein a second measurement field of the at least one message comprises the at least one indicator of the measurement value associated with the at least one RS.
19. The method of claim 1 , wherein the first value corresponds to a reserved value of a plurality of layer-1 reference signal received power (L1-RSRP) values, and wherein a second value, different from the reserved value, for the at least one measurement field of the at least one message is configured to indicate a measured L1-RSRP.
20. The method of claim 1 , further comprising measuring the at least one RS for measurement reporting,
wherein the at least one measurement field is configured to indicate a measured characteristic of the at least one RS.
21. The method of claim 1 , wherein the first value corresponds to a reserved value associated with an RS received power, and
wherein the at least one message further comprises a second value, different from the reserved value, for indicating an RS received power associated with a cell different from the secondary cell.
22. The method of claim 10 , wherein the at least one indicator of the unsuccessful BFR procedure comprises a reserved value of a plurality of reference signal received power (RSRP) values, and
wherein the first downlink signal comprises at least one reference signal.
23. The method of claim 10 , further comprising measuring a plurality of downlink signals for measurement reporting,
wherein the at least one field is configured to indicate a plurality of measurement values of the plurality of downlink signals.