Method and apparatus for CHO and fast MCG link recovery

Patent metadata

Field	Value
Publication number	US-12598666-B2
Application number	US-202017912755-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Mar 27, 2020
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

Embodiments of the present application relate to a method and an apparatus for Conditional handover (CHO) and fast MCG link recovery. According to an embodiment of the present application, a method can include: receiving fast master cell group (MCG) link recovery configuration information; receiving CHO configuration information indicating a set of CHO configurations and a set of execution conditions for a set of cells, each cell is associated with a CHO configuration and an execution condition; and evaluating the set of execution conditions based on the CHO configuration information. Embodiments of the present application can define the CE behavior when both the MCG link recovery procedure and the CHO procedure are configured for the UE.

First claim

What is claimed:

1 . A method performed by a user equipment (UE), the method comprising:
receiving fast master cell group (MCG) link recovery configuration information; receiving conditional handover (CHO) configuration information indicating a set of CHO configurations and a set of execution conditions for a set of cells, each cell is associated with a CHO configuration and an execution condition; evaluating the set of execution conditions based on the CHO configuration information; and based at least in part on a radio link failure in a MCG, initiating a fast MCG link recovery procedure, starting a timer associated with the fast MCG link recovery procedure, and stopping the evaluating the set of execution conditions.

2 . The method of claim 1 , further comprising:
not performing a CHO procedure during the fast MCG link recovery procedure.

3 . The method of claim 1 , further comprising:
not performing a CHO procedure when the timer associated with the fast MCG link recovery procedure is running.

4 . The method of claim 1 , further comprising:
performing a CHO procedure if the execution condition is met and the timer associated with the fast MCG link recovery procedure is not running.

5 . The method of claim 1 , further comprising:
applying the CHO configuration if the execution condition is met and the timer associated with the fast MCG link recovery procedure is not running.

6 . The method of claim 1 , further comprising:
performing a CHO procedure if the execution condition is met while the timer associated with the fast MCG link recovery procedure is running.

7 . The method of claim 6 , further comprising:
in response to performing the CHO procedure, stopping the timer associated with the fast MCG link recovery procedure if the timer associated with the fast MCG link recovery procedure is running.

8 . A user equipment (UE) for wireless communication, comprising:
at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to:
receive fast master cell group (MCG) link recovery configuration information;
receive conditional handover (CHO) configuration information indicating a set of CHO configurations and a set of execution conditions for a set of cells, each cell is associated with a CHO configuration and an execution condition;
evaluate the set of execution conditions based on the CHO configuration information; and
based at least in part on a radio link failure in a MCG, initiate a fast MCG link recovery procedure, start a timer associated with the fast MCG link recovery procedure, and stop the evaluation of the set of execution conditions.

9 . The UE of claim 8 , wherein the at least one processor is configured to cause the UE to not perform a CHO procedure during the fast MCG link recovery procedure.

10 . The UE of claim 8 , wherein the at least one processor is configured to cause the UE to not perform a CHO procedure when the timer associated with the fast MCG link recovery procedure is running.

11 . The UE of claim 8 , wherein the at least one processor is configured to cause the UE to perform a CHO procedure if the execution condition is met and the timer associated with the fast MCG link recovery procedure is not running.

12 . The UE of claim 8 , wherein the at least one processor is configured to cause the UE to apply the CHO configuration if the execution condition is met and the timer associated with the fast MCG link recovery procedure is not running.

13 . The UE of claim 8 , wherein the at least one processor is configured to cause the UE to perform a CHO procedure if the execution condition is met while the timer associated with the fast MCG link recovery procedure is running.

14 . A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
receive fast master cell group (MCG) link recovery configuration information;
receive conditional handover (CHO) configuration information indicating a set of CHO configurations and a set of execution conditions for a set of cells, each cell is associated with a CHO configuration and an execution condition;
evaluate the set of execution conditions based on the CHO configuration information; and
based in part on a radio link failure in a MCG, initiate a fast MCG link recovery procedure, start a timer associated with the fast MCG link recovery procedure, and stop the evaluation of the set of execution conditions.

15 . The processor of claim 14 , wherein the at least one controller coupled with at least one memory is configured to cause the processor to not perform a CHO procedure during the fast MCG link recovery procedure.

16 . The processor of claim 14 , wherein the at least one controller coupled with at least one memory is configured to cause the processor to not perform a CHO procedure when the timer associated with the fast MCG link recovery procedure is running.

17 . The processor of claim 14 , wherein the at least one controller coupled with at least one memory is configured to cause the processor to perform a CHO procedure if the execution condition is met and the timer associated with the fast MCG link recovery procedure is not running.

18 . The processor of claim 14 , wherein the at least one controller coupled with at least one memory is configured to cause the processor to apply the CHO configuration if the execution condition is met and the timer associated with the fast MCG link recovery procedure is not running.

19 . The processor of claim 14 , wherein the at least one controller coupled with at least one memory is configured to cause the processor to, in response to a radio link failure in a MCG, perform a CHO procedure if the execution condition is met while the timer associated with the fast MCG link recovery procedure is running.

20 . The UE of claim 8 , wherein the at least one processor is configured to cause the UE to, in response to performing the CHO procedure, stop the timer associated with the fast MCG link recovery procedure if the timer associated with the fast MCG link recovery procedure is running.

Assignees

• Lenovo Beijing Ltd

Inventors

• Wu Lianhai
• Yue Ran
• Han Jing
• Wang Haiming
• Shi Jie

Classifications

• H04W36/0055

  Transmission or use of information for re-establishing the radio link · CPC title

• H04W36/0061

  of neighbour cell information · CPC title

• H04W36/00837

  Determination of triggering parameters for hand-off · CPC title

• H04W36/305

  Handover due to radio link failure (control signalling for hand-off failure H04W36/0079) · CPC title

• H04W36/362

  Conditional handover · CPC title