Switching an uplink bandwidth part for a beam failure recovery of a wireless device
A wireless device activates a first uplink bandwidth part (BWP) of a first cell. A beam failure of a second cell is detected. The wireless device switches, based on the first uplink BWP not being configured with one or more beam failure recovery resources for the second cell, from the first uplink BWP to a second uplink BWP, of the first cell, configured with the one or more beam failure recovery resources. An uplink signal indicating the beam failure is transmitted via the second uplink BWP.
1. A method comprising:
activating, by a wireless device, a first uplink bandwidth part (BWP) of a first cell;
detecting a beam failure of a second cell;
switching, based on the first uplink BWP not being configured with one or more beam failure recovery resources for the second cell, from the first uplink BWP to a second uplink BWP, of the first cell, configured with the one or more beam failure recovery resources; and
transmitting, via the second uplink BWP, an uplink signal indicating the beam failure.
2. The method of claim 1 , wherein the switching the uplink BWP from the first uplink BWP to the second uplink BWP comprises activating the second uplink BWP as an active uplink BWP of the first cell.
3. The method of claim 1 , wherein the switching the uplink BWP from the first uplink BWP to the second uplink BWP comprises deactivating the first uplink BWP.
4. The method of claim 1 , further comprising receiving, one or more configuration parameters of a first cell and a second cell, wherein the one or more configuration parameters indicate a plurality of bandwidth parts (BWPs) of the first cell.
5. The method of claim 4 , wherein the one or more configuration parameters further indicate one or more reference signals (RSs) for the second cell.
6. The method of claim 5 , wherein one or more RSs comprise one or more channel state information RSs.
7. The method of claim 4 , wherein the one or more configuration parameters further indicate a maximum number of beam failure instance indications for the second cell.
8. The method of claim 7 , wherein the detecting the beam failure comprises detecting the beam failure based on a number of consecutive beam failure instance indications reaching to the maximum number of beam failure instance indications.
9. The method of claim 8 , wherein a beam failure instance indication of the consecutive beam failure instance indications comprises assessing one or more RSs with radio quality lower than a threshold.
10. The method of claim 9 , wherein the one or more configuration parameters further indicate the threshold based on a hypothetical block error rate.
11. 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:
activate a first uplink bandwidth part (BWP) of a first cell;
detect a beam failure of a second cell;
switch, based on the first uplink BWP not being configured with one or more beam failure recovery resources for the second cell, from the first uplink BWP to a second uplink BWP, of the first cell, configured with the one or more beam failure recovery resources; and
transmit, via the second uplink BWP, an uplink signal indicating the beam failure.
12. The wireless device of claim 11 , wherein the switching the uplink BWP from the first uplink BWP to the second uplink BWP comprises activating the second uplink BWP as an active uplink BWP of the first cell.
13. The wireless device of claim 11 , wherein the switching the uplink BWP from the first uplink BWP to the second uplink BWP comprises deactivating the first uplink BWP.
14. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive, one or more configuration parameters of a first cell and a second cell, wherein the one or more configuration parameters indicate a plurality of bandwidth parts (BWPs) of the first cell.
15. The wireless device of claim 14 , wherein the one or more configuration parameters further indicate one or more reference signals (RSs) for the second cell.
16. The wireless device of claim 15 , wherein one or more RSs comprise one or more channel state information RSs.
17. The wireless device of claim 14 , wherein the one or more configuration parameters further indicate a maximum number of beam failure instance indications for the second cell.
18. The wireless device of claim 17 , wherein the detection of the beam failure comprises detecting the beam failure based on a number of consecutive beam failure instance indications reaching to the maximum number of beam failure instance indications.
19. The wireless device of claim 18 , wherein a beam failure instance indication of the consecutive beam failure instance indications comprises assessing one or more RSs with radio quality lower than a threshold.
20. A system comprising:
a base station; and
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:
activate a first uplink bandwidth part (BWP) of a first cell;
detect a beam failure of a second cell;
switch, based on the first uplink BWP not being configured with one or more beam failure recovery resources for the second cell, from the first uplink BWP to a second uplink BWP, of the first cell, configured with the one or more beam failure recovery resources; and
transmit, to the base station via the second uplink BWP, an uplink signal indicating the beam failure.