US 12,108,280 B2
Efficient control of mobility for communications between terminal apparatus and base station apparatus
Takako Hori, Sakai (JP); Hidekazu Tsuboi, Sakai (JP); and Shohei Yamada, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/626,587
Filed by Sharp Kabushiki Kaisha, Sakai (JP)
PCT Filed Jul. 17, 2020, PCT No. PCT/JP2020/027848
§ 371(c)(1), (2) Date Jan. 12, 2022,
PCT Pub. No. WO2021/010466, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 2019-132001 (JP), filed on Jul. 17, 2019.
Prior Publication US 2022/0322139 A1, Oct. 6, 2022
Int. Cl. H04W 28/00 (2009.01); H04W 28/06 (2009.01); H04W 36/00 (2009.01)
CPC H04W 28/06 (2013.01) [H04W 36/0064 (2023.05)] 3 Claims
OG exemplary drawing
 
1. A terminal apparatus that communicates with a base station apparatus, the terminal apparatus comprising:
a receiver configured to receive an RRC (Radio Resource Control) reconfiguration message from the base station apparatus; and
a processor, wherein
the processor is configured to:
configure a first configuration to a PDCP (Packet Data Convergence Protocol) entity according to the RRC reconfiguration message, the PDCP entity being associated with a first RLC (Radio Link Control) entity associated with a source cell and a second RLC entity associated with a target cell;
submit a data to the first RLC entity in a case that the first configuration is configured and a first request is not requested; and
submit a data to the second RLC entity in a case that the first configuration is configured and the first request is requested,
the first configuration is a configuration for a handover in which transmission and/or reception of user data is performed in the target cell with continued transmission and/or reception of user data in the source cell, and
the first request is a request to switch a submission destination for the data.