To perform circuit switched communication (both call origination and call termination) even while a mobile station UE is performing awaiting in a LTE (Long Term Evolution) system.
The mobile communication method includes steps of: transmitting instruction information instructing a function AS to perform cell selection of a second communication system in the case where predetermined information is received which indicates that a radio base station eNB of a first communication system is related to initiation of circuit switched communication; instructing a function EMM to start circuit switched communication from the function AS that has received the instruction information; instructing a function MM to start circuit switched communication from the function EMM that has received the instruction from the function AS; selecting a cell of the second communication system at the function AS that has received the instruction information; and establishing a link for circuit switched communication via the selected cell of the second communication system by the function MM that has received the instruction from the function EMM.
YAMAGISHI HIROAKI
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Ichitaro Ito
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