Hitachi, Ltd.

Toshiya Ouchi

Susumu Matsui

Mika Mizutani

Shiro Tanabe

Tsutomu Kusaki

Haruo Shibata

Keisuke Shirai

Takeshi Maki

Koji Hirayama

Ken Nanjo

A plurality of packet gate ways (PGWS) are connected between a mobile communication system and an internet so that the corresponding IP subnetworks to those PGWs may be built. A visitor location register (VLR) operates to notify the PGW of location information of the mobile station (MS) and an IP address of a data terminal connected with the MS. If the notified IP address belongs to another IP subnetwork, the PGW notifies the corresponding PGW to that IP subnetwork of a fact that the local PGW is a destination. The PGW operates to manage the location information of the MS connected with the data terminal based on the notified content and perform the packet routing based on the managed content.

Mobil communication system for providing IP packet communications and method for routing IP packets

A mobile communication network is provided with a plurality of base stations each of which communicates with a plurality of mobile stations, a plurality of base station controllers (BSC) or control stations each of which is connected to a group of base stations, and switching centers each of which is connected to a plurality of BSC's. The BSC's are interconnected by an exclusive network and terminal information of the mobile stations are stored by the respective local service points (SCP) of the BSC's in a decentralized manner. When an authentication processing and the retrieval of location data for a mobile station is to be made by each BSC and in the case where necessary terminal information is not held in the local SCP of that BSC, the BSC broadcasts a request message for transfer of terminal information or vicarious execution of authentication processing to other BSC's through the exclusive network and waits for a response message from a BSC in which the necessary terminal information is held.

Mobile communication network and control method thereof

Growing community of inventors

Tokyo, Japan

Toshiya Ouchi