Patent ID: 7610363

Claim:
A method of reconfiguring an internet protocol (IP) address during handover by a mobile station (MS), the method comprising: (a) transmitting a ranging request message to a base station (BS) in a network; (b) receiving a ranging response message including an IP address refresh parameter from the BS in the network, wherein the IP address refresh parameter indicates whether or not IP address refreshing is required; (c) transmitting an IP address configuration network entity search message via the BS; (d) receiving an IP address configuration network entity search result message from the network via the BS; (e) transmitting an IP address configuration request message to the network via the BS; and (f) receiving an IP address configuration response message, through which and IP address is assigned, from the network via the BS, wherein the IP address refresh parameter triggers a higher layer protocol to refresh the IP address if the IP address refreshing is required.