Granted Patent B2

US 12,199,728 · App. 18/440,612 · Granted Jan 14, 2025

Inventors: Ali Cagatay Cirik (Chantilly, VA); Esmael Hejazi Dinan (McLean, VA); Hua Zhou (Vienna, VA); Hyoungsuk Jeon (Centreville, VA); Alireza Babaei (Fairfax, VA); Kyungmin Park (Vienna, VA)

Assignee: Comcast Cable Communications, LLC

H04B7/0695H04L1/0026H04L5/0051H04L5/0094H04W74/0833H04W80/02

Abstract

Claims (48)

1. A method comprising:

receiving, by a wireless device, a first beam failure medium access control (MAC) control element (CE) that comprises a field indicating one or more first beam failure reference signal resources, wherein the first beam failure MAC CE is configured to activate the one or more first beam failure reference signal resources for beam failure of a downlink bandwidth part (BWP) of a cell;

based on receiving the first beam failure MAC CE, assessing a radio link quality of one or more reference signals for beam failure detection of the downlink BWP of the cell;

incrementing a beam failure instance counter for the cell;

receiving a second beam failure MAC CE that comprises a field indicating one or more second beam failure reference signal resources, wherein the second beam failure MAC CE is configured to activate the one or more second beam failure reference signal resources for beam failure of the downlink BWP of the cell; and

based on the receiving the second beam failure MAC CE, setting the beam failure instance counter to zero.

2. The method of claim 1 , wherein the first beam failure MAC CE comprises:

a second field indicating the cell; and

a third field indicating the BWP of the cell.

3. The method of claim 1 , wherein the incrementing comprises incrementing, based on a value of the radio link quality not satisfying a threshold, the beam failure instance counter.

4. The method of claim 1 , further comprising:

transmitting, for beam failure of the downlink BWP of the cell and based on the beam failure instance counter satisfying a threshold, an uplink signal.

5. The method of claim 1 , further comprising:

measuring one or more second reference signals in the one or more second beam failure reference signal resources for beam failure of the downlink BWP of the cell.

6. The method of claim 1 , wherein the first beam failure MAC CE comprises a beam failure recovery MAC CE (BFR MAC CE).

7. The method of claim 1 , wherein the second beam failure MAC CE indicates deactivation of the one or more first beam failure reference signal resources.

8. A method comprising:

receiving, by a wireless device, a beam failure medium access control (MAC) control element (CE) comprising:

a first field indicating a cell;

a second field indicating a downlink bandwidth part (BWP) of the cell; and

a third field indicating one or more beam failure reference signal resources, associated with one or more reference signals, for beam failure of the downlink BWP of the cell,

wherein the beam failure MAC CE is configured to activate the one or more beam failure reference signal resources; and

based on receiving the beam failure MAC CE, assessing a radio link quality of the one or more reference signals.

9. The method of claim 8 , further comprising:

incrementing, based on a value of a radio link quality not satisfying a threshold, a beam failure instance counter.

10. The method of claim 9 , further comprising:

transmitting, for beam failure of the downlink BWP of the cell and based on the beam failure instance counter satisfying a threshold, an uplink signal.

11. The method of claim 10 , wherein the uplink signal indicates a second reference signal of the one or more beam failure reference signal resources.

12. The method of claim 8 , further comprising:

measuring one or more second reference signals of the one or more beam failure reference signal resources for beam failure of the downlink BWP of the cell.

13. The method of claim 8 , wherein the beam failure MAC CE comprises a beam failure recovery MAC CE (BFR MAC CE).

14. A method comprising:

incrementing, by a wireless device, a beam failure instance counter based on a beam failure instance indication of a cell;

receiving a beam failure medium access control (MAC) control element (CE) comprising:

a first field indicating the cell;

a second field indicating a downlink bandwidth part (BWP) of the cell; and

a third field indicating one or more beam failure reference signal resources for beam failure of the downlink BWP of the cell,

wherein the beam failure MAC CE is configured to activate the one or more beam failure reference signal resources; and

based on the receiving the beam failure MAC CE, setting the beam failure instance counter to zero.

15. The method of claim 14 , further comprising:

determining, based on the beam failure instance counter satisfying a threshold, beam failure of the downlink BWP of the cell.

16. The method of claim 14 , further comprising:

measuring one or more reference signals, of the one or more beam failure reference signal resources, for beam failure of the downlink BWP of the cell.

17. The method of claim 16 , further comprising:

transmitting, for beam failure of the downlink BWP of the cell, an uplink signal indicating a reference signal of the one or more reference signals.

18. The method of claim 14 , wherein a physical layer of the wireless device indicates a beam failure instance indication to a medium access layer of the wireless device based on a radio link quality, of one or more reference signals used for beam failure, not satisfying than a threshold.

19. The method of claim 14 , wherein the beam failure MAC CE comprises a fourth field, wherein the fourth field comprises a value indicating activation of the one or more beam failure reference signal resources.

20. The method of claim 14 , wherein the beam failure MAC CE indicates deactivation of one or more second beam failure reference signal resources.

Assignments (2)

Continuity (4)

References Cited (400)