Patent ID: 11950312
Assignee: SHARP KABUSHIKI KAISHA
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A method for a terminal apparatus that communicates with a base station apparatus, the method comprising:
receiving, from the base station apparatus, a message related to Radio Resource Control (RRC) connection reconfiguration;
based on a fact that a first configuration is included in the message related to the RRC connection reconfiguration,
generating a Medium Access Control (MAC) entity of a cell group including a target primary cell;
determining, based on the first configuration included in the message related to the RRC connection reconfiguration, a Data Radio Bearer (DRB) to which the first configuration is to be applied and a DRB to which the first configuration is not to be applied;
changing a primary cell with which a first Radio Link Control (RLC) entity and a first Dedicated Traffic CHannel (DTCH) logical channel of the DRB to which the first configuration is not to be applied are associated from a source primary cell to the target primary cell; and
establishing, for the DRB to which the first configuration is to be applied, a second RLC entity and a second DTCH logical channel for the target primary cell, wherein
the first configuration is a configuration for a handover in which transmission and/or reception of first user data is performed in a target cell in a state where transmission and/or reception of second user data is continued in a source cell.