Patent ID: 8712409
Filing Date: 2014-04-29
Classification: H04W

Abstract:
1. A home database that facilitates establishing a communication session with a mobile device having a registered internet protocol multimedia subsystem (IMS) session in a visiting cellular network, the home database comprising: one or more communication ports that are configured to receive addresses of application services utilized by mobile devices having registered internet protocol multimedia subsystem (IMS) sessions in visiting cellular networks; a storage area that stores, for mobile devices operating in a visiting network, the received address of the application service that is associated with each mobile device and an identifier of the associated mobile device; and a roaming management module that is configured to receive a Send Routing Information (SRI) message from a mobile switching center, the SRI message intended to facilitate establishing a communication session between a requesting mobile device and a terminating mobile device, the roaming management module accessing the storage area to retrieve the address of the application service associated with the terminating mobile device and forwarding the SRI message to the retrieved address, the roaming management module receiving an IMS roaming number associated with the terminating mobile device in response to the SRI message and providing the IMS roaming number to the mobile switching center in order to facilitate establishing the communication session between the requesting and terminating mobile devices.