Hitachi, Ltd.

Katuaki Ikeda

Kinji Mori

Hirokazu Ihara

Shoji Miyamoto

Makoto Nohmi

Nobuhisa Kobayashi

Hiroshi Matsumaru

A message communication method and system in which a message signal to be communicated includes a function code signal portion and a data signal portion, the former being an index to the content of the latter and forming the substantial part of the message signal, and in which such a message signal is communicated not only among equipment blocks connected with one and the same communication line but also among those connected with different communication lines coupled with each other through a common equipment block connected with both of the coupled communication lines. Function codes being indices to the contents to data required to be processed by equipment blocks connected with the coupled communication lines are respectively registered in different memories in the common equipment block and the function code signal portions of message signals received by the common equipment block are compared with the stored function codes in the common equipment block and if concurrence takes place transferrence of the message signals between the coupled communication lines is effected.

Message communication method and system

A method of retrieving and editing distributed information, in which one of a plurality of equipment units connected to a common signal transmission line issues or originates a request to retrieve data information distributed among and stored in respective files of the other equipment units and to edit the distributed data information. The above-mentioned one equipment unit sends to the transmission line a retrieval request message containing retrieval information necessary to retrieve distributed data information. Each of the equipment units storing therein distributed data information receives the retrieval request message from the transmission line, and the files are retrieved on the basis of the retrieval information to retrieve the distributed data information. The data information retrieved in at least a first one of the equipment units storing therein the distributed data information is sent to the transmission line. This data information retrieved in the first equipment unit is received by at least two of the other equipment units through the transmission line for editing. These two other equipment units edit both the received data information from the first equipment unit and data information retrieved in these two equipment units, and then send the edited data information to the transmission line.

Method of retrieving and editing distributed information

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Kashiwa, Japan

Katuaki Ikeda