MOBILE COMMUNICATION SYSTEM, MOBILE COMMUNICATION METHOD, MOBILE STATION, RADIO ACCESS NETWORK DEVICE, AND CORE NETWORK DEVICE

摘要

PROBLEM TO BE SOLVED: To enable circuit switching communication (both of transmission and reception) even if a mobile station UE waits in an LTE-form system.

SOLUTION: A mobile communication method includes: a step of allowing a radio base station eNB of a first communication system to transmit instruction information for instructing a function AS to perform cell selection of a second communication system, when receiving prescribed information indicating relationship to the start of the circuit switching communication; a step of allowing the function AS section that has received the indication information to instruct a function EMM to start the circuit switching communication; a step of allowing the function EMM that has received the instructions from the function AS to instruct a function MM to start the circuit switching communication; a step of allowing the function AS that has received the instruction information to select the cell of the second communication system; and a step of allowing the function MM that has received the instructions from the function EMM to establish a link for circuit switching communication via the selected cell of the second communication system.

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