Granted Patent B2

US 12,262,232 · App. 17/773,120 · Granted Mar 25, 2025

Inventor: Min Wang (Luleå, SE)

Assignee: Telefonaktiebolaget LM Ericsson (Publ)

H04W24/08H04W36/305H04W74/0833H04W36/0055

Abstract

Claims (24)

1. A method performed by a wireless device, the method comprising:

monitoring for a problem with a certain procedure that would trigger the detection of a radio link failure;

while monitoring for the problem with the certain procedure, stopping or suspending monitoring for a consistent uplink listen-before-talk (LBT) failure that would also trigger detection of a radio link failure; and

considering or not considering radio link failure to be detected due to detecting the consistent uplink LBT failure, depending respectively on whether the wireless device is not monitoring or is monitoring for the problem with the certain procedure when consistent uplink LBT failure is detected.

2. The method of claim 1 , wherein monitoring for the problem with the certain procedure comprises starting a timer at the beginning of or during the certain procedure and monitoring for expiration of the timer, wherein expiration of the timer indicates the problem with the certain procedure, and wherein said considering or not considering comprises considering or not considering radio link failure to be detected due to detecting consistent uplink LBT failure, depending respectively on whether the timer is not or is running when the consistent uplink LBT failure is detected.

3. The method of claim 1 , wherein the considering or not considering comprises, based on the wireless device monitoring for the problem with the certain procedure when consistent uplink LBT failure is detected, not considering radio link failure to be detected due to detecting the consistent uplink LBT failure.

4. The method of claim 3 , further comprising:

based on the monitoring, detecting the problem with the certain procedure; and

responsive to the detecting the problem with the certain procedure, considering radio link failure to be detected.

5. The method of claim 1 , further comprising transmitting a request for connection re-establishment, wherein the request indicates a cause of the request for connection re-establishment as being the consistent uplink LBT failure.

6. The method of claim 1 , wherein detecting the consistent uplink LBT failure comprises detecting the consistent uplink LBT failure in an active bandwidth part in a serving cell of the wireless device.

7. The method of claim 1 , wherein the certain procedure is a random access procedure, a handover procedure, or a cell change procedure towards a target cell, and wherein detecting the consistent uplink LBT failure comprises detecting consistent uplink LBT failure based on failure to complete an LBT procedure for performing an uplink transmission as part of the certain procedure towards the target cell.

8. The method of claim 1 , wherein the problem with the certain procedure is failure of the certain procedure to complete within a certain duration.

9. The method of claim 1 , further comprising, upon an occurrence of an uplink LBT failure, incrementing an uplink LBT failure counter and starting or restarting an inter-failure duration timer, wherein the uplink LBT failure counter is to be reset to zero upon expiration of the inter-failure duration timer, and wherein detecting consistent uplink LBT failure comprises detecting that the uplink LBT failure counter reaches or exceeds a threshold.

10. The method of claim 1 , wherein the problem with the certain procedure is a problem that would trigger the wireless device to consider radio link failure to be detected.

11. The method of claim 1 , wherein the certain procedure is a random access procedure, a handover procedure, or a cell change procedure.

12. The method of claim 1 , further comprising receiving, from a network node, signaling indicating whether, or that, the wireless device is to not consider radio link failure to be detected if the wireless device detects the consistent uplink LBT failure while monitoring for a problem with the certain procedure.

13. A wireless device comprising:

communication circuitry; and

processing circuitry configured to:

monitor for a problem with a certain procedure that would trigger the detection of a radio link failure;

while monitoring for the problem with the certain procedure, stopping or suspending monitoring for a consistent uplink listen-before-talk (LBT) failure that would also trigger detection of a radio link failure; and

consider or not consider radio link failure to be detected due to detecting the consistent uplink LBT failure, depending respectively on whether the wireless device is not monitoring or is monitoring for the problem with the certain procedure when the consistent uplink LBT failure is detected.

14. The wireless device of claim 13 , wherein the processing circuitry is configured to monitor for the problem with the certain procedure by starting a timer at the beginning of or during the certain procedure and monitoring for expiration of the timer, wherein expiration of the timer indicates the problem with the certain procedure, and wherein the processing circuitry is configured to consider or not consider radio link failure to be detected by considering or not considering radio link failure to be detected due to detecting the consistent uplink LBT failure, depending respectively on whether the timer is not or is running when the consistent uplink LBT failure is detected.

Assignments (1)

Continuity (2)

References Cited (15)