MOBILE COMMUNICATION METHOD, MOBILE COMMUNICATION SYSTEM, DELIVERY SERVER, SUBSCRIBER INFORMATION MANAGEMENT SERVER, AND SESSION MANAGEMENT SERVER

摘要

A radio base station according to the present invention comprising : a mobile communication method for delivering an incoming signal for voice communication to a mobile station on standby in any of a plurality of classifications of radio access networks, the method comprising, a step in which when a session management server managing a mobile station and the classification of the radio access network corresponding to each session between a delivery server and a radio access network device detects a change to the classification of the radio access network of the standby target of the mobile station, a subscriber information management server managing the subscriber information of each mobile station is notified of this intention, a step in which the subscriber information management server notifies the delivery server of the classification of the radio access network of the standby target of the mobile station as notified by the session management server and a step in which the delivery server manages the classification of the radio access network of the standby target of the mobile station as notified by the subscriber information management server, and a step in which the delivery server delivers the incoming signal for voice communication based on the location information for VoIP of the mobile station managed by itself, the CS communication routing number of the mobile station, and the classification of the radio access network of the standby target of the mobile station, depending on the received incoming signal for voice communication addressed to the mobile station.