TERMINAL DEVICE, MME (MOBILITY MANAGEMENT ENTITY), CORE NETWORK DEVICE, COMMUNICATION SYSTEM INCLUDING MME, AND COMMUNICATION CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a terminal device supporting control plane CIoT EPS optimization and user plane CIoT EPS optimization, and communication control means suitable for a network device capable of connecting with the terminal device.SOLUTION: There are provided a terminal device supporting control plane CIoT EPS optimization and user plane CIoT EPS optimization, communication control means suitable for switching from the control plane CIoT EPS optimization to the user plane CIoT EPS optimization for a network device capable of connecting with the terminal device, and communication control means suitable for switching from the control plane CIoT EPS optimization to data communication using an S1-U.SELECTED DRAWING: Figure 1