MOBILE COMMUNICATION METHOD

摘要

A mobile communication method according to the present
invention communicates between a mobile station(UE) and a
radio base station (eNB) by using a certain key. The method
includes the step of: (A) acquiring, at a radio base station
managing a re-establishment target cell for the mobile station
(UE) , a first key (K eNB[n+1]) for generating a certain key from
a switching center (MME) in a procedure for re-establishment
of the mobile station (UE), the certain key to be used for
communication between the mobile station (UE) and a next
re-establishment target cell for the mobile station (UE).