Patent ID: 6847621

Claim:
An address resolution method for a communication system comprising a plurality of mobile packet terminals, a connection oriented network which accommodates the mobile packet terminals and supplies a connection oriented communication, a connectionless network having a switch node and an inter-working device for mutually connecting the respective networks, comprising the steps of: receiving data containing a Gratuitous-ARP packet which is of an address resolution protocol (ARP), from one of the mobile packet terminals by way of the inter-working device, in a case when the one mobile packet terminal is handed over to a handover destination on the connection oriented network; transmitting the packet to the connectionless network by way of the inter-working device; making the switch node receive the packet by way of the inter-working device; renewing a physical address management table provided in the switch node on the basis of the content of the packet on the switch node; and determining another inter-working device at the handover destination of the one mobile packet terminal on the switch node.