| 摘要 |
<p>An in-bound roaming system in mobile communication and a method thereof are provided to secure reliability of a network in a GSM/WCDMA packet network, thereby providing a normal roaming service even though malfunction occurs. A mobile communication terminal(100) produces a service request of a data call. A serving GPRS(General Packet Radio Service) support node(220) backs up an expired IP(Internet Protocol) address list by a shadow cache while deleting an expired IP(Internet Protocol) address list from a cache at every period. And the serving GPRS support node obtains a corresponding IP address about the service request. If the serving GPRS support node requests to inquire the IP address corresponding to the service request, a DNS(Domain Name Server) server(230) transmits the IP address to the serving GPRS support node by inquiring the IP address.</p> |
