Hitachi, Ltd.

Ken Nanjo

Shiro Tanabe

Tsutomu Kusaki

Takeshi Maki

Katsuyuki Tsunami

Yoshinao Kiuchi

Toshiya Ouchi

Various kinds of presentation information specific to an area in a radio-communication system can be transmitted to a one or more specific radio-communication terminals at the same time. A user is able to receive commercial information, for example, from an information provider as presentation information when a user enters a location-registration area. A user terminal transmits a request for a location registration and the location-registration area and a terminal ID are transmitted to the information providing apparatus, which searches a database for a subscriber ID by using the terminal ID as a key and further searches a database for presentation-information ID by using the subscriber ID and the location-registration area information as a pair of keys. The presentation information is then transmitted to the terminal through a USCCH channel and displayed on a display unit of the terminal.

Information communicating method, information providing apparatus, radio-communication system and radio-communication terminal

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

Yokohama, Japan

Ken Nanjo