Patent ID: 8060087

Claim:
A method for implementing an international roaming service in CDMA intelligent network system which comprises a Home Service Control Point, a Home Mobile Switching Center/Service Switching Point, a visited Mobile Switching Center/Service Switching Point, a roaming Service Switching Point, comprising: receiving, by the Home Service Control Point, a call triggered at the Home Mobile Switching Center/Service Switching Point; determining, by the Home Service Control Point, a called subscriber of the call is a Pre-Paid Charging subscriber in international roaming and has an account with enough balance; sending, by the Home Service Control Point, a LOCREQ request to a Home Location Register of the called subscriber; instructing, by the Home Location Register, the visited Mobile Switching Center/Service Switching Point of the called subscriber to assign a roaming number to the called subscriber, according to the LOCREQ request, and returning the roaming number to the Home Service Control Point; instructing, by the Home Service Control Point, the Home Mobile Switching Center/Service Switching Point to route a voice channel for the call to the roaming Service Switching Point; dispatching, by the Home Service Control Point, the roaming number to the roaming Service Switching Point, and starting to monitor the call; and routing, by the roaming Service Switching Point, the call according to the roaming number to connect the visited Mobile Switching Center/Service Switching Point, so that a conversation is carried out.