US 11,818,620 B2
Method and device for user mobility
Ningjuan Chang, Shanghai (CN); Shohei Yamada, Sakai (JP); and Renmao Liu, Shanghai (CN)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP); and FG Innovation Company Limited, Tuen Mun (HK)
Appl. No. 16/471,190
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP); and FG Innovation Company Limited, Tuen Mun (HK)
PCT Filed Dec. 19, 2017, PCT No. PCT/CN2017/117173
§ 371(c)(1), (2) Date Jun. 19, 2019,
PCT Pub. No. WO2018/113661, PCT Pub. Date Jun. 28, 2018.
Claims priority of application No. 201611217085.4 (CN), filed on Dec. 23, 2016.
Prior Publication US 2019/0380081 A1, Dec. 12, 2019
Int. Cl. H04W 36/18 (2009.01); H04W 76/27 (2018.01); H04W 36/00 (2009.01); H04W 36/08 (2009.01)
CPC H04W 36/18 (2013.01) [H04W 36/0058 (2018.08); H04W 36/0072 (2013.01); H04W 36/08 (2013.01); H04W 76/27 (2018.02)] 10 Claims
OG exemplary drawing
 
1. A method executed by a user equipment (UE), comprising:
transmitting, to a base station, a message to indicate that the UE is capable of performing a conditional handover without requiring to receive a command from the base station to perform the conditional handover;
receiving, from the base station, one or more conditional handover configurations, each of the one or more conditional handover configurations including:
information associated with a corresponding one of a plurality of neighboring cells, and
a handover condition comprising a measurement event based on a signal quality of at least one of a serving cell and the corresponding one of the plurality of neighboring cells;
storing the one or more conditional handover configurations;
performing handover monitoring according to one or more handover conditions of the one or more conditional handover configurations;
after the UE determines that a handover condition of one conditional handover configuration of the one or more conditional handover configurations is met, performing the conditional handover to handover to one of the plurality of neighboring cells associated with the one conditional handover configuration, wherein the conditional handover is performed by the UE without receiving any additional command for performing the conditional handover from the base station; and
releasing the stored one or more conditional handover configurations when the executing of the handover is successfully completed, wherein:
each of the one or more handover conditions is configured by a measurement identifier that is used to indicate a measurement report configuration associated with each of the one or more handover conditions,
the measurement report configuration comprises information used to indicate the measurement report configuration is associated with one of the one or more handover conditions, and
the UE does not perform a measurement report associated with the measurement report configuration.