US 12,225,418 B2
Method and apparatus for mobility management in wireless communication system
Hongsuk Kim, Seoul (KR); Sunyoung Lee, Seoul (KR); Youngdae Lee, Seoul (KR); and Yejee Lee, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/414,599
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Dec. 27, 2019, PCT No. PCT/KR2019/018598
§ 371(c)(1), (2) Date Jun. 16, 2021,
PCT Pub. No. WO2020/139015, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 10-2018-0172898 (KR), filed on Dec. 28, 2018.
Prior Publication US 2022/0053388 A1, Feb. 17, 2022
Int. Cl. H04W 36/00 (2009.01); H04W 76/27 (2018.01)
CPC H04W 36/0058 (2018.08) [H04W 36/0044 (2013.01); H04W 36/0061 (2013.01); H04W 76/27 (2018.02)] 13 Claims
OG exemplary drawing
 
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a network, a configuration for conditional mobility, wherein the configuration for conditional mobility comprises a corresponding mobility condition for each of multiple candidate cells;
evaluating mobility conditions for the multiple candidate cells;
based on the evaluation of a mobility condition for a target cell among the multiple candidate cells, starting a timer for a mobility attempt to the target cell;
performing the mobility attempt to the target cell while the timer is running; and
transmitting, to the network, report information based on a failure of the mobility attempt to the target cell, the failure of the mobility attempt to the target cell being related to an expiry of the timer,
wherein the report information is transmitted based on an instruction received from the network,
wherein the report information comprises candidate cell information for all of the multiple candidate cells based on the instruction, and
wherein the report information comprises:
a cell identity of the target cell that has failed the mobility attempt;
a cell identity of at least one neighbor cell among the multiple candidate cells; and
information informing that a mobility condition for the at least one neighbor cell has been fulfilled at a moment of the failure of the mobility attempt.