Resource management for beam failure recovery procedures

Patent metadata

Field	Value
Publication number	US-11936459-B2
Application number	US-202117231862-A
Country	US
Kind code	B2
Filing date	Apr 15, 2021
Priority date	Aug 9, 2018
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

Wireless communications are described. A wireless device and/or a base station may provide improved resource management. A base station may configure and/or transmit a beam failure recovery medium access control control element (BFR MAC CE) to a wireless device to configure particular cells to use particular assigned candidate beams from a pool of shared candidate beams during beam failure recovery operations. The BFR MAC CE may provide orthogonality in beams that may be designated for use by active cells out of a shared pool of beams that may not be orthogonal across all potentially available cells.

First claim

The invention claimed is:

1. A method comprising:
receiving, by a wireless device, one or more configuration parameters that indicate a plurality of beam failure recovery request (BFRQ) resources for a first cell;
receiving, by the wireless device, a medium access control (MAC) control element (CE) indicating, for a second cell, at least two BFRQ resources of the plurality of BFRQ resources; and
transmitting, by the wireless device, based on a BFRQ resource of the at least two BFRQ resources, at least one message associated with beam failure recovery of the second cell.

2. The method of claim 1 , further comprising:
determining, for a random access procedure associated with beam failure recovery, at least one uplink channel resource, wherein the transmitting the at least one message associated with beam failure recovery comprises transmitting the at least one message via the at least one uplink channel resource.

3. The method of claim 2 , wherein:
the MAC CE further comprises a field indicating a downlink bandwidth part (BWP), and
the random access procedure associated with beam failure recovery is for the downlink BWP.

4. The method of claim 2 , further comprising:
based on detecting a beam failure before receiving a second MAC CE, refraining from performing a second random access procedure for a second beam failure recovery.

5. The method of claim 2 , wherein the at least one uplink channel resource comprises at least one of:
a random access channel resource;
a physical uplink shared channel resource; or
a physical uplink control channel resource.

6. The method of claim 2 , wherein:
the MAC CE further indicates a downlink bandwidth part (BWP),
the at least one uplink channel resource comprises an uplink BWP associated with the downlink BWP, and
the transmitting the at least one message comprises transmitting the at least one message via the uplink BWP associated with the downlink BWP.

7. The method of claim 1 , wherein:
the plurality of BFRQ resources comprises a first quantity of BFRQ resources;
the at least two BFRQ resources are among a second quantity of orthogonal BFRQ resources that are each indicated by a different value; and
the second quantity is less than the first quantity.

8. The method of claim 1 , further comprising determining, based on the MAC CE, to perform at least one of:
activating a first BFRQ resource of the at least two BFRQ resource; or
deactivating the first BFRQ resource.

9. The method of claim 1 , wherein:
the BFRQ resource is associated with a first reference signal of one or more reference signals for a candidate beam selection, and
the method further comprises determining, based on the first reference signal, at least one uplink channel resource.

10. The method of claim 1 , wherein:
the at least one message comprises at least one preamble, and
the BFRQ resource is indicated by a preamble index.

11. The method of claim 1 , wherein the at least one message comprises at least one of:
a preamble; or
a scheduling request.

12. The method of claim 1 , wherein the BFRQ resource comprises a physical random access channel (PRACH) resource.

13. The method of claim 1 , wherein each of the plurality of BFRQ resources comprises a time-frequency resource.

14. The method of claim 1 , further comprising:
determining, by the wireless device, based on measurement associated with each BFRQ resource of the at least two BFRQ resources, the BFRQ resource.

15. 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 configuration parameters that indicate a plurality of beam failure recovery request (BFRQ) resources for a first cell;
receive a medium access control (MAC) control element (CE) indicating, for a second cell, at least two BFRQ resources of the plurality of BFRQ resources; and
transmit, based on a BFRQ resource of the at least two BFRQ resources, at least one message associated with beam failure recovery of the second cell.

16. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
determine, for a random access procedure associated with beam failure recovery, at least one uplink channel resource; and
transmit the at least one message associated with beam failure recovery by transmitting the at least one message via the at least one uplink channel resource.

17. The wireless device of claim 16 , wherein:
the MAC CE further comprises a field indicating a downlink bandwidth part (BWP), and
the random access procedure associated with beam failure recovery is for the downlink BWP.

18. The wireless device of claim 16 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
based on detecting a beam failure before receiving a second MAC CE, refrain from performing a second random access procedure for a second beam failure recovery.

19. The wireless device of claim 16 , wherein the at least one uplink channel resource comprises at least one of:
a random access channel resource;
a physical uplink shared channel resource; or
a physical uplink control channel resource.

20. The wireless device of claim 16 , wherein:
the MAC CE further indicates a downlink bandwidth part (BWP),
the at least one uplink channel resource comprises an uplink BWP associated with the downlink BWP, and
the instructions, when executed by the one or more processors, cause the wireless device to transmit the at least one message by transmitting the at least one message via the uplink BWP associated with the downlink BWP.

21. The wireless device of claim 15 , wherein:
the plurality of BFRQ resources comprises a first quantity of BFRQ resources;
the at least two BFRQ resources are among a second quantity of orthogonal BFRQ resources that are each indicated by a different value; and
the second quantity is less than the first quantity.

22. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
determine, based on the MAC CE, to perform at least one of:
activating a first BFRQ resource of the at least two BFRQ resources; or
deactivating the first BFRQ resource.

23. The wireless device of claim 15 , wherein:
the BFRQ resource is associated with a first reference signal of one or more reference signals for a candidate beam selection, and
the instructions, when executed by the one or more processors, further cause the wireless device to:
determine, based on the first reference signal, at least one uplink channel resource.

24. The wireless device of claim 15 , wherein:
the at least one message comprises at least one preamble, and
the BFRQ resource is indicated by a preamble index.

25. The wireless device of claim 15 , wherein the at least one message comprises at least one of:
a preamble; or
a scheduling request.

26. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:
receive one or more configuration parameters that indicate a plurality of beam failure recovery request (BFRQ) resources for a first cell;
receive a medium access control (MAC) control element (CE) indicating, for a second cell, at least

Assignees

• Comcast Cable Comm Llc

Inventors

• Cirik Ali
• Dinan Esmael Hejazi
• Zhou Hua
• Jeon Hyoungsuk
• Babaei Alireza
• Park Kyungmin

Classifications

• H04B7/06964 Primary

  Re-selection of one or more beams after beam failure · CPC title

• H04W74/0836

  with 2-step access · CPC title

• H04W74/0838

  using contention-free random access [CFRA] · CPC title

• H04W74/0833 Primary

  Random access procedures, e.g. with 4-step access · CPC title

• H04B7/0695 Primary

  using beam selection · CPC title