Patent ID: 6958988

Claim:
A mobile communications network comprising: one or more routing nodes for receiving data to which the IP address of a mobile station is added, and for carrying out routing of the data in accordance with routing information; and one or more edge nodes for receiving the data routed by said routing nodes, and for transmitting the data to the mobile station corresponding to the IP address of the mobile station added to the data, wherein said mobile communications network further comprises: a location information server for managing information about correspondence between the IP address of the mobile station and the IP address of the edge node that supervises an area visited by the mobile station, wherein said routing nodes include a gate node; said gate node retrieves, by accessing said location information server, the IP address of the edge node supervising the area visited by the mobile station corresponding to the IP address of the mobile station added to the received data, and adds the IP address of the edge node to the received data; said routing information includes information about correspondence between the IP address of the edge node and a transmission route; and said routing nodes carry out the routing of the received data in accordance with the IP address of the edge node added to the received data and the routing information, wherein the IP address of a group of mobile stations can be added as the IP address of the mobile station to be added to the data, wherein said location information server manages information about correspondence between the IP addresses of the mobile stations belonging to the group and the IP address of the group of the mobile stations; said gate node retrieves, when the IP address of the group of the mobile stations is added to the received data, the IP addresses of the edge nodes supervising the areas visited by the mobile stations corresponding to the IP address of the group of the mobile stations by accessing said location information server, replicates the received data by the number of the edge nodes, adds to each of the data the IP address of each of the edge nodes and the IP addresses of the mobile stations visiting the supervisory area of the edge node, and carries out the routing of the data.