Patent ID: 6728245
Filing Date: 2004-04-27
Classification: H04L

Abstract:
A communication method for exchanging data between node terminals, between routers, or between a node terminal and a router using a communication system composed of a pair of networks each comprising a plurality of routers each having one or more said node terminals, said plurality of routers being connected via a first data transmission line, said pair of networks being connected via a pair of routers belonging to said pair of networks respectively and a second data transmission line connecting said pair of routers, said communication method comprising the steps of:causing one of said pair of routers to send into one direction an address assignment frame containing an address value to one of said pair of networks, to assign an address to each router and each node terminal, based on said address value, sequentially from the router, which is nearest to said one of pairs of routers, to said one of pairs of routers itself, and to send said address assignment frame, which has been returned, to the other router of said pair of routers; and causing the other router of said pair of routers to assign the address to itself based on the address value contained in said received address assignment frame, to send said address assignment frame to the other network into said one direction, to assign the address to each router and each node terminal, based on said address value, sequentially from the router which is nearest to the other router, and to return said address assignment frame, which has been returned, to said one of said pair of routers.