US 7,010,302 B1Granted

Packet transmission method, packet transmission system and packet data transmission medium on mobile communications network system

AssigneeNtt Docomo, Inc.

InventorsAkihisa Nakajima, Hiroshi Nakamura, Teruki Niwa, Yukichi Saito, Tomoyuki Ohtani, Hideo Morita

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Abstract

An address structure in mobile communications network facilitating routing of a packet. At the initial position of the address, is located a prefix or the like indicating the type of the address structure, which indicates the present mobile communications network system, for example. At the next position, a location address (LA) is located characterizing the present invention. The location address is usually placed at the position of a subnetwork address. The location address (LA) is provided for each mobile switching system, and constitutes part of an IP address of a user using a mobile station under the control of the mobile switching system. At the final position, is located a user identifier (user ID) which is used for identifying a user, and is provided uniquely for each user. The IP address in accordance with the present invention can be split into the foregoing three sections, part of which includes the location address and user identifier indicating the location of the mobile station in the mobile communications network, thereby enabling the identification of the user in the mobile communications network system and the control of the packet transmission.

Claims2

Dependent claims

A processing method in a mobile communications network system for routing a packet using an IP address between a user in a mobile communications network system and a user inside or outside the mobile communications network system, the processing method comprising the steps of:

generating, at a domain-name server, an IP address of the user in the mobile communications network system including a location address of the user and a user identifier which identifies the user, by acquiring the location address from an apparatus managing a location address of the user;
and
storing the generated IP address in connection with a domain name of the user in the mobile communications network system, in a database in the domain-name server, the processing method further comprising the steps of:
referring to a memory managing access link establishment status of a user in the domain-name server, when an inquiry regarding the user is sent to the domain-name server;
commanding an access link termination node in whose area the user is visiting, to establish an access link, if an access link is not established for the user;
establishing, at the access link termination node, an access link between the access link termination node and the user;
and
providing, at the access link termination node, the user with the location address, when the access link is established.

5 more elements

Dependencies are inferred from the claim text.