| 摘要 |
The present invention provides a method for a mobile station to roam among networks of different criteria. It includes: recording user information in number portability database, when a mobile station processes location registration, the home location register of the current roaming network processes an inter-network number portability request, then returns a location register response message; when the mobile station initiates a call, the call flow is the same as the current initiation flow; when the mobile station ends a call, the initiation switch center obtains the inter-network roaming state of the mobile station, then processes call transfer. The present invention expediently realizes inter-network roaming among networks of different criteria, especially the inter-network roaming between the GSM network and the CDMA network, need not realize complicated IIF protocol conversion function, reduces infection to the current network stability, and realizes number portability when the subscriber roams among different networks; it uses a simple private interface between the number portability database and the home location register, does not depend on the standards of GSM MAP and CDMA MAP and does not infect the absolute development of the two networks.
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