System and method for terminating communication sessions with roaming mobile devices

A computer readable medium, excluding transitory signals, having instructions stored thereon that when executed by one or more processor in an Internet Protocol Multimedia (IMS) network cause a computing system to perform a method comprising:

• receiving, via the IMS network, a send routing information (SRI) message indicating a request to establish a communication session with a mobile device;
• determining whether the mobile device associated with the SRI message has a registered session with an application service;
• denying the connection request upon determining that the mobile device is not associated with the application service;
• and
• forwarding, via the IMS network, the SRI message to the application service upon determining that the mobile device is associated with the application service,
• wherein the SRI message is used by the application service to determine a roaming number that has been previously assigned to the mobile device by the application service.

A computing system comprising:

• a memory for storing programmed instructions;
• a processor, coupled to the memory, and configured to execute the programmed instructions to perform operations in an Internet Protocol Multimedia (IMS) network including:
• receiving, via the IMS network, a send routing information (SRI) message indicating a request to establish a communication session with a mobile device;
• determining whether the mobile device associated with the SRI message has a registered session with an application service;
• denying the connection request upon determining that the mobile device is not associated with the application service;
• and
• forwarding, via the IMS network, the SRI message to the application service upon determining that the mobile device is associated with the application service,
• wherein the SRI message is used by the application service to determine a roaming number that has been previously assigned to the mobile device by the application service.