User equipment and communication control method performed by user equipment
View Patent ↗A communication unit for implementing an operation for CIoT in 5GS and a communication unit for mapping a connection associated with the function for CIoT to an appropriate connection in a handover between the 5GS and EPS are provided. Even in the 5GS supporting a network slice, a communication unit for allowing the operation for CIoT to be used is provided. Furthermore, a communication unit for mapping a PDN connection associated with the operation for CIoT and established in the EPS to an appropriate PDU session in a handover of user equipment from the EPS to the 5GS is provided. Furthermore, a communication unit for mapping a PDU session established in the 5GS to an appropriate PDN connection in the handover of the user equipment from the 5GS to the EPS is provided.
1. A User Equipment (UE) comprising:
transmission and/or reception circuitry configured to receive first information in a Protocol Data Unit (PDU) session establishment accept message in a procedure to establish a PDU session,
wherein the first information indicates that the PDU session is only for control plane Cellular Internet of Things (CIoT) 5G System (5GS) optimization; and
a controller,
wherein
after inter-system change from N1 mode to S1 mode, the controller associates Evolved Packet System (EPS) bearer contexts corresponding to the PDU session with the first information.
2. A communication control method performed by a User Equipment (UE), the method comprising:
receiving first information in a Protocol Data Unit (PDU) session establishment accept message in a procedure to establish a PDU session,
wherein
the first information indicates that the PDU session is only for control plane Cellular Internet of Things (CIoT) 5G System (5GS) optimization; and
after inter-system change from N1 mode to S1 mode, associating Evolved Packet System (EPS) bearer contexts corresponding to the PDU session with the first information.