US 12,089,107 B2
Release of configurations for conditional handovers based on security configurations
Atsushi Ishii, Vancouver, WA (US)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/620,620
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Jun. 16, 2020, PCT No. PCT/JP2020/023649
§ 371(c)(1), (2) Date Dec. 17, 2021,
PCT Pub. No. WO2020/262124, PCT Pub. Date Dec. 30, 2020.
Claims priority of provisional application 62/865,629, filed on Jun. 24, 2019.
Prior Publication US 2022/0330125 A1, Oct. 13, 2022
Int. Cl. H04W 36/30 (2009.01); H04W 36/36 (2009.01)
CPC H04W 36/305 (2018.08) [H04W 36/36 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A wireless terminal comprising:
receiver circuitry configured to receive one or more reconfiguration messages, each of the one or more reconfiguration messages comprising an information element which indicates a sequence of one or more conditional handover configurations, each of the one or more conditional handover configurations comprising an identity of a candidate target cell, each of the one or more conditional handover configurations being associated with at least one triggering condition;
processor circuitry configured:
to detect a radio link failure on a radio link to a source cell, and;
to initiate, based on the radio link failure, a cell selection to select a cell; and
transmitter circuitry configured to transmit, based on selecting the cell, a re-establishment request message in a case that the selected cell is different from any one of candidate target cells configured in one or more saved conditional handover configurations based on the one or more reconfiguration messages, wherein
in a case that the selected cell is different from any one of the candidate target cells, the processor circuitry is further configured to release the one or more saved conditional handover configurations, and
in a case that the selected cell is one of the candidate target cells, the processor circuitry is further configured to perform a conditional handover.