Hitachi, Ltd.

Yoshinao Kiuchi

Hajime Abe

Ken Nanjo

Katsuyuki Tsunami

Takaaki Higashi

To detect network faults or congestion of traffic at an interface of a gateway system for connecting an IP network and a telephone network on the side of the IP network and to allow the IP network to control alternative routing at the telephone network, network faults and congestion of traffic on the side of the IP network are monitored by the gateway system having an interface function between the telephone network and the IP network. When a network fault or congestion of traffic is detected, the gateway system notifies the telephone network upstream thereof of the disabled line and instructs the same to perform alternative routing, which makes it possible to prevent the occurrence of a situation in which the quality of communication at the interface between the telephone network and IP network can not be maintained.

Gateway system having controller and signal processor for interconnecting IP network and telephone network and method for controlling alternative routing at the time of fault of gateway system

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.

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Yokohama, Japan

Yoshinao Kiuchi