Patent ID: 8655357

Claim:
A method, comprising: receiving, by an internet-protocol-multimedia-system core, a message sent by a wireless communication device, wherein: the message comprises a feature tag corresponding to each internet-protocol-multimedia-system application present at a memory of the wireless communication device; and the feature tag corresponding to each application is associated with a feature tag status value to indicate whether the application should be registered with a communication system according to a routine selected from a group consisting of: the application should be registered if a corresponding wireless communication access type is a first wireless communication access type and should not be registered if the corresponding wireless communication access type is not the first wireless communication access type; and the application should be registered if a current wireless communication network being used by the wireless communication device is a home network for the wireless communication device and should not be registered if the current wireless communication network is a roaming network for the wireless communication device; and executing, by the internet-protocol-multimedia-system core, in connection with each application, based on the feature tag corresponding to the application, and depending on whether the application is presently registered with the communication system, an action selected from a group consisting of: re-registering, to the internet-protocol-multimedia-system server, the application being already registered with the Internet-protocol-multimedia-system server; and de-registering, from the internet-protocol-multimedia-system server, the application registered with the internet-protocol-multimedia-system server.