Hitachi, Ltd.

Shinji Hori

Kinji Mori

Katsumi Kawano

Hirokazu Kasashima

Setsuo Kawakami

Kozo Nakai

Toshio Endo

A plurality of processors are connected to one another through a transmission line to constitute a distributed data processing system. Each processor adds a processor identification code to the time of its own and broadcasts them as time data at fixed periods. Each processor receives the time data on the transmission line, judges whether or not the received time data is the time data of the processor as the object of synchronization and sets the time data from the processor as the object of synchronization to the timer of its own system in order to synchronize the timers.

Method and apparatus for synchronization management of timers in

A message processing system has a common transmission medium and a plurality of processors or processing equipments connected to the common transmission medium. The processors process messages independenty from each other. Each processor adds information relating to an order of messages to a message resulting from processing by the processor and sends to resulting message to the common transmission medium. In accordance with the invention, a plurality of messages are readily identified.

System and method of message communication capable of checking

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Mito, Japan

Shinji Hori