Patent ID: 6173334
Filing Date: 2001-01-09
Classification: H04L

Abstract:
A communicating method between LAN systems for establishing communication between a first terminal equipment and a second terminal equipment in a network system comprising a first LAN system having said first terminal equipment, a second LAN system having said second terminal equipment, an intermediate network provided to interface said first and second LAN systems, a first communication equipment to transfer a packet between said first LAN system and said intermediate network, and a second communication equipment to transfer a packet between said intermediate network to said second LAN system, wherein said communicating method comprises the steps of:defining addresses of terminal equipments of said first and second LAN systems so as to be unique in each of said first LAN system, said second LAN system, and said intermediate network;transmitting a packet including an address, as a transmission destination address, of a terminal equipment of a transmission destination based on an address definition of said first LAN system from a terminal equipment serving as a transmission source of said first LAN system so as to transmit data from the terminal equipment of said first LAN system to the terminal equipment of said second LAN system;converting the transmission destination address of said packet into an address of said transmission destination terminal equipment on said intermediate network and transferring the converted address onto said intermediate network by said first communication equipment;converting the transmission destination address of said packet to the address of said transmission destination terminal equipment on said second LAN system and transferring the converted address to said second LAN system by said second communication equipment; andreceiving said packet transferred to said second LAN system on the basis of the address on said second LAN system by said transmission destination terminal equipment on said second LAN system.