A METHOD FOR REGISTERING A MOBILE TERMINAL IN A MOBILE RADIO COMMUNICATION SYSTEM

摘要

The present invention relates to a method for registering a mobile terminal in a mobile radio communication system. The mobile radio communication system comprises at least one mobile radio communication core network and at least one IMS core network. The mobile terminal is located within a radio access network associated to the at least one mobile radio communication core network and comprises at least a first and a second periodic registration timer for respectively registering the mobile terminal with the at least one mobile radio communication core network and the at least one IMS core network upon their respective expiry. The method comprises the step of registering the mobile terminal with the mobile radio communication core network and with the at least one second network as any one of the at least first and second periodic registration timers, which is first to expire, expires.