US 12,439,474 B2
Method and device for performing handover in wireless communication system
Sangbum Kim, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd., Seoul (KR)
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on May 24, 2024, as Appl. No. 18/673,533.
Application 18/673,533 is a continuation of application No. 17/311,556, granted, now 11,997,550, previously published as PCT/KR2019/017033, filed on Dec. 4, 2019.
Claims priority of application No. 10-2018-0155471 (KR), filed on Dec. 5, 2018.
Prior Publication US 2024/0314654 A1, Sep. 19, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 76/30 (2018.01); H04W 36/00 (2009.01); H04W 36/30 (2009.01); H04W 36/36 (2009.01)
CPC H04W 76/30 (2018.02) [H04W 36/0079 (2018.08); H04W 36/00837 (2018.08); H04W 36/304 (2023.05); H04W 36/362 (2023.05)] 12 Claims
OG exemplary drawing
 
1. A method, performed by a user equipment (UE), the method comprising:
receiving, from a source cell, a conditional handover configuration via a radio resource control (RRC) message, the conditional handover configuration including configuration of a plurality of candidate cells for a conditional handover and conditions associated with the plurality of candidate cells;
evaluating whether the conditions associated with the plurality of candidate cells are met;
in case that a condition associated with a first candidate cell is met, performing a first handover to the first candidate cell based on the conditional handover configuration, the first candidate cell being one of the plurality of candidate cells for the conditional handover; and
in case that the first handover to the first candidate cell fails, performing a second handover to a second candidate cell based on the conditional handover configuration, the second candidate cell being one of the plurality of candidate cells for the conditional handover; and
starting a T304 timer based on the second handover to the second candidate cell.