Patent ID: 7957344

Claim:
A new path setting method in a communication system where a plurality of access routers each constituting a subnet are connected via a communication network, wherein, based on a first path as set between a predetermined correspondent node connected to said communication network and a mobile terminal connected to a first access router, said new path setting method sets up a second path between said predetermined correspondent node connected to the communication network and said mobile terminal under a condition where the mobile terminal is connected to a second access router by performing a handover from said first access router to said second access router, wherein said method comprises the steps of: under a condition that said mobile terminal is connected to said first access router, a message including information on said first path is transmitted to said second access router or to a predetermined node adjacent thereto from said mobile terminal, and a crossover node of said first path and said second path is determined when the path is changed from said first path to said second path based on an overlapping condition of a path from said first access router where said message passes through said second access router or the predetermined node adjacent to said second access router and said first path.