Oki Electric Industry Co., Ltd.

Makiko Kaji

Masaki Yamauchi

Youiti Kado

Ryohei Konuma

A network communication system sends identical information from a source node to a plurality of destination nodes by first sending the information from the source node to a predetermined relay node, then sending the information from the relay node to the destination nodes over predetermined communication paths. The predetermined communication paths connect the destination nodes to the relay node in a star topology. The star topology greatly simplifies the routing of the information, while automatically avoiding looped paths, and enables the identical information to arrive at all destination nodes in real time, substantially simultaneously.

Network communication system with relay node for broadcasts and multicasts

A processing rate monitoring apparatus includes an appearance interval counter for counting a packet interval in a monitored connection at a real number level, and a determining arrangement, operable each time a packet corresponding to a monitored connection is detected, to compare a count value on the appearance interval counter indicating a time elapsed from the previous detection to the detection of the packet with an allowed value for an appearance interval calculated from a transmission rate of the monitored connection to determine the presence or absence of a transmission rate violation in a current monitoring cycle.

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Nara, Japan

Makiko Kaji