Radio link failure reporting based on a failure of a beam failure recovery procedure
A wireless device initiates a beam failure recovery procedure based on a beam failure of at least one beam of a cell. A radio link failure is determined based on a failure of the beam failure recovery procedure. A radio link failure report is transmitted. The radio link failure report comprises: a first field indicating that the failure of the beam failure recovery procedure is a cause of the radio link failure; and a second field indicating a random access resource for the beam failure recovery procedure.
1. A method comprising:
initiating, by a wireless device, a beam failure recovery procedure based on a beam failure of at least one beam of a cell;
determining a radio link failure based on a failure of the beam failure recovery procedure; and
transmitting a radio link failure report comprising:
a first field indicating that the failure of the beam failure recovery procedure is a cause of the radio link failure; and
a second field indicating a random access resource for the beam failure recovery procedure.
2. The method of claim 1 , further comprising receiving a radio resource control message comprising one or more beam configuration parameters of the at least one beam of the cell.
3. The method of claim 2 , wherein:
the radio resource control message indicates a random access preamble for the beam failure recovery procedure; and
the beam failure recovery procedure comprises transmitting the random access preamble for a recovery request.
4. The method of claim 2 , wherein the radio link failure report comprises the one or more beam configuration parameters of the at least one beam of the cell.
5. The method of claim 1 , wherein the radio link failure report comprises at least one of:
control resource set information for the beam failure recovery procedure; or
a number of random access preamble transmissions associated with the beam failure recovery procedure.
6. The method of claim 1 , wherein the radio link failure report indicates at least one of:
a cell identifier of the cell;
at least one beam index of the at least one beam of the cell;
a beam index of a candidate beam for the beam failure recovery procedure; or
a received power for the candidate beam for the beam failure recovery procedure.
7. The method of claim 1 , wherein the at least one beam comprises at least one of:
a synchronization signal block beam; or
a channel state information-reference signal beam.
8. The method of claim 1 , further comprising:
selecting, by the wireless device and based on the determining the radio link failure, a second cell of a first base station;
transmitting, to the first base station, a preamble for a random access to the second cell of the first base station; and
receiving a random access response in response to the preamble for the random access.
9. 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:
initiate a beam failure recovery procedure based on a beam failure of at least one beam of a cell;
determine a radio link failure based on a failure of the beam failure recovery procedure; and
transmit a radio link failure report comprising:
a first field indicating that the failure of the beam failure recovery procedure is a cause of the radio link failure; and
a second field indicating a random access resource for the beam failure recovery procedure.
10. The wireless device of claim 9 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive a radio resource control message comprising one or more beam configuration parameters of the at least one beam of the cell.
11. The wireless device of claim 10 , wherein:
the radio resource control message indicates a random access preamble for the beam failure recovery procedure; and
the beam failure recovery procedure comprises transmitting the random access preamble for a recovery request.
12. The wireless device of claim 10 , wherein the radio link failure report comprises the one or more beam configuration parameters of the at least one beam of the cell.
13. The wireless device of claim 9 , wherein the radio link failure report comprises at least one of:
control resource set information for the beam failure recovery procedure; or
a number of random access preamble transmissions associated with the beam failure recovery procedure.
14. The wireless device of claim 9 , wherein the radio link failure report indicates at least one of:
a cell identifier of the cell;
at least one beam index of the at least one beam of the cell;
a beam index of a candidate beam for the beam failure recovery procedure; or
a received power for the candidate beam for the beam failure recovery procedure.
15. The wireless device of claim 9 , wherein the at least one beam comprises at least one of:
a synchronization signal block beam; or
a channel state information-reference signal beam.
16. The wireless device of claim 9 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
select, based on the wireless device determining the radio link failure, a second cell of a first base station;
transmit, to the first base station, a preamble for a random access to the second cell of the first base station; and
receive a random access response in response to the preamble for the random access.
17. A first base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the first base station to:
receive a radio link failure report comprising:
a first field indicating that a failure of a beam failure recovery procedure is a cause of a radio link failure; and
a second field indicating a random access resource for the beam failure recovery procedure.
18. The first base station of claim 17 , wherein the instructions, when executed by the one or more processors, further cause the first base station to:
receive, from a second base station, a part of the radio link failure report;
determine, based on the part of the radio link failure report, configuration parameters of a cell on which a beam failure occurred; and
transmit, to one or more wireless devices, the configuration parameters.
19. The first base station of claim 17 , wherein the instructions, when executed by the one or more processors, further cause the first base station to transmit a radio resource control message comprising one or more beam configuration parameters of at least one beam of a cell for which the beam failure recovery procedure is performed.
20. The first base station of claim 19 , wherein:
the radio resource control message indicates a random access preamble for the beam failure recovery procedure; and
the beam failure recovery procedure comprises receiving the random access preamble for a recovery request.