Packet transmission system in mobile communications network system

摘要

A packet transmission system in a mobile communications network system for routing a packet using an IP address between a first user (302,308) in the mobile communications network system and a second user (308,302), comprising a domain-name server (402) including a database for storing an IP address in connection with a domain-name, and an access link termination node (112,114) in a subdivided network in the mobile communications network,
and said domain-name server (402) includes:
means for storing (1106) the IP address including the location address of the first user;
means for receiving (1108) the user location registration information from the access link termination node; and
means for updating (1104) the IP address using the user location registration information received.