Hitachi-kokusai Electric Inc.

Makoto Watanabe

Jun Abe

Satoshi Sakata

Nodoka Mimura

Norihisa Matsumoto

Hidetoshi Nishiyama

Osamu Otosaka

Kazuhiko Yoshii

Motoki Chibazaki

The objective of the present invention is to provide a relay apparatus capable of performing normal relay transmission for broadcast waves by preventing effects caused by wraparound in a relay apparatus. For broadcast waves received by a relay apparatus (), the same broadcast data are placed in each of a defined segment (f) and a first segment (f) other than the defined segment, whereupon the relay apparatus removes broadcast data for the defined segment (f) from the received broadcast waves, and transmits broadcast waves in which the broadcast data for the first segment (f) have been exchanged with each of the defined segment (f) and a second segment (f) other than the defined segment and the first segment. As a result, the defined segment (f) which imparts wraparound effects to the received broadcast waves is removed, and therefore, it is possible to perform normal relay transmission of the broadcast waves.

Relay apparatus for broadcast waves

In a communication system using an IP tunnel for communication between application processing apparatuses (hereinafter, processing apparatuses), an application can be moved to an arbitrary processing apparatus, update of tunnel tables included in the respective processing apparatuses is quickly performed, and a buffer for waiting for packets during the table update is made small. A redundancy managing apparatus manages a correspondence between a virtual IP address (VIP) of an application in a communication system and an IP address (RIP) of an processing apparatus to execute the application. The processing apparatus notifies the VIP of the communication partner application of the application to the redundancy managing apparatus. The redundancy managing apparatus notifies the VIP of the communication partner application of the moved application and the RIP of the processing apparatus to execute the communication partner application to the processing apparatus of the movement destination (failover destination) of the application.

Redundant failover system, redundancy managing apparatus and application processing apparatus

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Kawaguchi, Japan

Makoto Watanabe