PUCCH based beam failure recovery procedure
A wireless device receives one or more messages comprising one or more configuration parameters indicating: one or more reference signals for a beam failure detection procedure; and a discontinuous reception (DRX) configuration for controlling transitions between a DRX inactive state and a DRX active state. The beam failure detection procedure is performed based on measurements of the one or more reference signals. A first value of a counter is determined based on detecting at least one beam failure instance during the DRX active state. A transition from the DRX active state to the DRX inactive state is made based on the DRX configuration. The beam failure detection procedure is stopped in response to the transitioning. The beam failure detection procedure continues with the first value of the counter after transitioning from the DRX inactive state to the DRX active state.
1. A wireless device comprising:
a communication interface configured to receive one or more messages comprising one or more configuration parameters indicating:
one or more reference signals for a beam failure detection procedure; and
a discontinuous reception (DRX) configuration for controlling transitions between a DRX inactive state and a DRX active state;
processor circuitry configured to:
perform the beam failure detection procedure based on measurements of the one or more reference signals;
increment, in the DRX active state, a counter of detected beam failure instances to a first value of the counter during a time period of a beam failure detection timer;
transition from the DRX active state to the DRX inactive state based on the DRX configuration;
in response to the transitioning from the DRX active state to the DRX inactive state and during the DRX inactive state spanning a plurality of time periods of the beam failure detection timer:
stop the measurements of the one or more reference signals for the beam failure detection procedure; and
retain the first value of the counter; and
continue to perform the beam failure detection procedure with the first value of the counter after transitioning from the DRX inactive state to the DRX active state.
2. The wireless device of claim 1 , wherein the one or more configuration parameters further indicate the beam failure detection timer.
3. The wireless device of claim 2 , wherein the processor circuitry is further configured to stop the beam failure detection timer based on transitioning from the DRX active state to the DRX inactive state.
4. The wireless device of claim 2 , wherein the processor circuitry is further configured to restart the beam failure detection timer based on transitioning from the DRX inactive state to the DRX active state.
5. The wireless device of claim 2 , wherein the processor circuitry is further configured to restart the beam failure detection timer based on transitioning from the DRX active state to the DRX inactive state.
6. The wireless device of claim 2 , wherein the processor circuitry is further configured not to reset, during the DRX inactive state, the first value of the counter to zero based on an expiry of the beam failure detection timer in the DRX inactive state.
7. The wireless device of claim 2 , wherein the processor circuitry is further configured to restart the beam failure detection timer based on detecting at least one beam failure instance.
8. The wireless device of claim 2 , wherein the processor circuitry is further configured to reset the first value of the counter to zero based on an expiry of the beam failure detection timer in the DRX active state.
9. The wireless device of claim 1 , wherein the processor circuitry is configured to stop the beam failure detection procedure by not providing a beam failure instance indication, by a physical layer of the wireless device, to a medium-access control layer of the wireless device.
10. The wireless device of claim 1 , wherein the processor circuitry is configured to perform the beam failure detection procedure by assessing a radio link quality of the one or more reference signals.
11. The wireless device of claim 10 , wherein the processor circuitry is configured to detect at least one beam failure instance by assessing the radio link quality of the one or more reference signals lower than a threshold.
12. The wireless device of claim 11 , wherein the one or more configuration parameters indicate the threshold.
13. The wireless device of claim 11 , wherein the threshold is based on a hypothetical block error rate.
14. The wireless device of claim 11 , wherein the processor circuitry is configured to stop the beam failure detection procedure by not assessing a radio link quality of the one or more reference signals.
15. The wireless device of claim 11 , wherein the processor circuitry is further configured to provide a beam failure instance indication in the DRX inactive state, by a physical layer of the wireless device to a medium-access control layer of the wireless device, wherein the beam failure instance indication is the same as a previous beam failure instance indication.
16. The wireless device of claim 11 , wherein the processor circuitry is further configured to provide a beam failure instance indication, by a physical layer of the wireless device, to a medium-access control layer of the wireless device in the DRX inactive state.
17. The wireless device of claim 11 , wherein the one or more configuration parameters further indicate the counter of beam failure instances.
18. The wireless device of claim 17 , wherein the processor circuitry is further configured to initiate a beam failure recovery procedure based on the first value of the counter being equal to or greater than the counter of beam failure instances.
19. The wireless device of claim 11 , wherein the one or more reference signals comprise one or more channel state information reference signals.
20. The wireless device of claim 11 , wherein the one or more reference signals comprise one or more synchronization signal/physical broadcast channel blocks.