US 12,193,097 B2
Terminal apparatus, base station apparatus, and method
Takako Hori, Sakai (JP); Hidekazu Tsuboi, Sakai (JP); and Shohei Yamada, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/626,591
Filed by Sharp Kabushiki Kaisha, Sakai (JP)
PCT Filed Jul. 17, 2020, PCT No. PCT/JP2020/027838
§ 371(c)(1), (2) Date Jan. 12, 2022,
PCT Pub. No. WO2021/010463, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 2019-132002 (JP), filed on Jul. 17, 2019.
Prior Publication US 2022/0386201 A1, Dec. 1, 2022
Int. Cl. H04W 76/20 (2018.01); H04W 36/00 (2009.01); H04W 36/18 (2009.01)
CPC H04W 76/20 (2018.02) [H04W 36/0061 (2013.01); H04W 36/185 (2023.05)] 5 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 including a first DRB (Data Radio Bearer) configuration and a second DRB configuration from the base station apparatus; and
a processor, wherein
the processor is configured to:
not configure a first configuration to a first PDCP (Packet Data Convergence Protocol) entity of a first DRB corresponding to the first DRB configuration in a case that a first parameter is not included in the first DRB configuration; and
configure the first configuration to a second PDCP entity of a second DRB corresponding to the second DRB configuration in a case that the first parameter is included in the second DRB configuration, and
the first configuration is a configuration for a handover in which transmission and/or reception of user data in the target cell with continued transmission and/or reception of user data in the source cell.