Patent ID: 9173184
Filing Date: 2015-10-27
Classification: H04W

Abstract:
1. A mobile communication system comprising: a mobile switching center (MSC) configured to transfer, to a home subscriber server (HSS), a location registration request message which is received from a user equipment attempting a location registration through a circuit switched (CS) domain; the home subscriber server (HSS) configured (i) to receive the location registration request message from the mobile switching center (MSC), (ii) to register a location of the user equipment according to the received location registration request message, and (iii) to transmit first location registration information of the user equipment using a session initiation protocol (SIP) message to a service centralization and continuity (SCC) application server without receiving a request for the first location registration information from the SCC application server; and the SCC application server configured (i) to receive the first location registration information of the user equipment from the home subscriber server (HSS), (ii) to receive second location registration information of the user equipment from a call session control function (CSCF) when a corresponding location registration is performed at a packet switched (PS) domain, and (iii) to perform anchoring of a call transferred from the circuit switched (CS) domain or the packet switched (PS) domain, wherein the SCC application server is an IP multimedia subsystem (IMS) based server; and wherein each of the first location registration information and the second location registration information includes information on locations of the user equipment and networks to which the user equipment registers.