US 11,991,572 B2
User equipment (UE)-triggered handover with early preparation in mobile networks
Li-Chuan Tseng, Hsinchu (TW); Yuanyuan Zhang, Beijing (CN); Yung-Hsiang Liu, Hsinchu (TW); Chun-Fan Tsai, Hsinchu (TW); and Chia-Chun Hsu, Hsinchu (TW)
Assigned to MEDIATEK INC., Hsinchu (TW)
Appl. No. 17/417,549
Filed by MEDIATEK INC., Hsinchu (TW)
PCT Filed Sep. 30, 2019, PCT No. PCT/CN2019/109267
§ 371(c)(1), (2) Date Jun. 23, 2021,
PCT Pub. No. WO2020/069664, PCT Pub. Date Apr. 9, 2020.
Claims priority of provisional application 62/754,658, filed on Nov. 2, 2018.
Claims priority of provisional application 62/741,663, filed on Oct. 5, 2018.
Prior Publication US 2022/0116839 A1, Apr. 14, 2022
Int. Cl. H04W 36/00 (2009.01); H04W 36/36 (2009.01)
CPC H04W 36/00837 (2018.08) [H04W 36/0058 (2018.08); H04W 36/0061 (2013.01); H04W 36/0085 (2018.08); H04W 36/36 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method comprising:
receiving an early measurement report configuration that configures UE early measurement reports from a serving cell by a user equipment (UE) in a wireless network;
receiving an early handover command by the UE from the serving base station, wherein the early handover command includes at least one early handover elements comprising a handover candidate cell list of handover candidate cells, corresponding triggering condition for each handover candidate cell on the handover candidate cell list, and an early handover indication;
monitoring triggering conditions for candidate cells on the handover candidate cell list based on a UE-triggered handover configuration;
subsequently, receiving a network-triggered handover command to a target cell;
suspending the UE-triggered handover configuration; and
performing a network-triggered handover to the target cell;
wherein the UE discards the UE-triggered handover configuration upon a successful completion of a network-triggered handover to the target cell.