Patent ID: 7277434
Filing Date: 2007-10-02
Classification: H04L,H04M,H04W,Y02D

Abstract:
1. A wireless electronic device which is roaming into a foreign subnetwork from a home subnetwork, comprising: a first application established utilizing Session Initialization Protocol—Mobile (SIP-M) to output a first group of packets through a first virtual interface during and after the wireless electronic device moves from the home subnetwork to the foreign subnetwork; a second application utilizing a Mobile Internet Protocol (Mobile IP protocol) to output a second group of packets through a second interface during and after the wireless electronic device moves from the home subnetwork to the foreign subnetwork; a common physical interface coupled to the first virtual interface and the second interface of the wireless electronic device, wherein the common physical interface of the wireless electronic device receives the first group of packets and the second group of packets; outputs the first group of packets to the first server at a first IP address corresponding to a first server housing an Internet Protocol (IP) address server having a first IP address, and outputs the second group of packets to a second server at the second IP address from the wireless electronic device, a common physical server including both the IP address server and the foreign agent; and a routing table to determine a first next hop of the first group of packets or a second next hop of the second group of packets, the routing table including a default route with a third IP address of a third server, and an address resolution protocol (ARP) table entry is inserted into the routing table which maps the third IP address to a second server MAC address, wherein the first IP address is equal to the second IP address and the first next hop is the same as the second next hop.