Patent ID: 7082307
Filing Date: 2006-07-25
Classification: H04W

Abstract:
1. A method of implementing number portability of a user from a home mobile network to a second mobile network, comprising the steps of: calling the user by a caller of the home mobile network, a Directory Number of the home mobile network of the user being carried to the second mobile network; routing the call to Visited Mobile Switch Center (VMSCA); transmitting a SRI REQ message for retrieving a roaming number by the Visited Mobile Switch Center (VMSCA) to Home Location Register (HLR) of the user, the Directory Number of the home mobile network of the user being carried to the second mobile network; transmitting a PRN REQ message to Gateway Mobile Switch Center (GMSCA) by the Home Location Register (HLR) of the user, the Directory Number of the home mobile network of the user being carried to the second mobile network; determining the received PRN RFQ message by the Gateway Mobile Switch Center (GMSCA) to trigger an intelligent service to Number Portability DataBase+(NPDB+); deciding the user, of whom the Directory Number of the home mobile network is carried to the second mobile network, by the Number Portability DataBase+(NPDB+), to determine whether the user is really a user, of whom the home mobile network Directory Number being carried to the second mobile network, or not, if the decision is Yes, then a virtual roaming number is assigned, and returned back to the Gateway Mobile Switch Center (GMSCA) in a CONNECT message; if the decision is No, then an error code is returned back to the Gateway Mobile Switch Center (GMSCA); returning the virtual roaming number to the Home Location Register (HLR) by the Gateway Mobile Switch Center (GMSCA) in a PRN RSP message; returning the virtual roaming number to the Gateway Mobile Switch Center (GMSCA) by the Home Location Register (HLR) in a SRI ACK message; analyzing the virtual roaming number by the Visited Mobile Switch Center (VMSCA), and routing the call to a prior Gateway Mobile Switch Center (GMSCB) of the home mobile network; routing the call to a Gateway Mobile Switch Center (GMSCC) by the Gateway Mobile Switch Center (GMSCB) based on a routed number; and determining a current subscribed network by the home mobile network for the user, of whom the home mobile networks Directory Number is carried to the second mobile network.