Patent ID: 11924698
Assignee: FG INNOVATION COMPANY LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by a user equipment (UE) for cell selection while the UE is in a radio resource control (RRC) Inactive state, the method comprising:
receiving, via control signaling, a configuration indicating a target frequency carrier and a corresponding target core network (CN) type, wherein the configuration is received while the UE is connected to a fifth-generation core (5GC) type network, and the target CN type comprises an evolved packet core (EPC) type;
transitioning from an RRC Connected state to the RRC Inactive state, instead of an RRC Idle state, based on the received control signaling, wherein, in the RRC Inactive state, the UE suspends an RRC connection associated with a serving cell and keeps an RRC connection configuration, and, in the RRC Idle state, the UE releases the RRC connection associated with the serving cell and the RRC connection configuration that was kept at the UE;
selecting a suitable cell among a plurality of suitable cells that are associated with the target frequency carrier while the UE is in the RRC Inactive state, wherein the suitable cell is selected irrespective of the target CN type being the EPC type; and
after selecting the suitable cell, determining that the EPC type is a suitable CN type for the UE.