Patent ID: 11882478
Assignee: FG INNOVATION COMPANY LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A user equipment (UE), comprising:
at least one of a transmission unit and a reception unit, wherein
the at least one of the transmission unit and the reception unit receives, from a core network, a protocol data unit (PDU) session establishment reject message including first identification information and a cause value, the first identification information indicating behaviors of the UE after a first public land mobile network (PLMN) is changed, and the cause value indicating insufficient resources for a single network slice selection assistance information (S-NSSAI); and
a controller that:
does not stop, when the first PLMN is changed, a back-off timer for congestion management based on the S-NSSAI, the back-off timer being activated in the first PLMN; and
determines, based on the first identification information, whether initiation of a PDU session establishment procedure, while the S-NSSAI is in a second PLMN, is allowed after the first PLMN is changed.