Multiplex communications – Wide area network – Packet switching
Patent
1993-12-17
1995-09-05
Marcelo, Melvin
Multiplex communications
Wide area network
Packet switching
370 941, 370 99, 3701101, H04L 1228, H04L 1240
Patent
active
054485622
ABSTRACT:
There is a communication system using a bi-directional bus, which includes a plurality of devices (e.g., TV image receiver or video tape recorder, etc.) connected to each other. Each device comprises a transmit signal formation unit adapted to form a transmit signal having a frame structure consisting of an address field for specifying addresses of devices between which communication is carried out, a control field for specifying a data communication command indicating communication of data or a control command communication command indicating communication of control command, whereby, in transmitting data, the device specifies the content of the control field of the leading frame as the data communication command to form the transmit signal; a bus output unit for outputting the transmit signal formed by the transmit signal formation unit to the bi-directional bus; a bus input unit adapted to receive the bi-directional bus; and a control unit for detecting on the basis of the content of the control field of the leading frame of the transmit signal received by the bus input unit whether current communication is communication of data or communication of control command, whereby when communication of data is detected, the control unit recognizes that the content of the data field of this frame is specified as data to carry out a control to receive data.
REFERENCES:
patent: 5293379 (1994-03-01), Carr
patent: 5325361 (1994-06-01), Lederer et al.
Elektronik, vol. 39, No. 10, May 11, 1990, Munchen De, pp. 140-143, Jurgen Sorgenfrei et al., `Schnittstellen-IC fur den seriellen kfz-Bus`, p. 142, left column, line 26-34; Fig. 2.
IEEE Lts. The Magazine Of Lightwave Communication Systems, vol. 2 No. 1, Feb. 1991, New York US pp. 36-45, Roger W. Uhlhorn `The Fiber Optic High-Speed Data Bus for a New Generation of Military Aircraft`, p. 40, right column, line 44-p. 41, left column, line 10; figure 4.
IEEE Instruction and Measurement Technology Conference, Apr. 1988, New York US pp. 20-25, Richard A. Schuh `An Overview of the 1553 Bus with Testing and Simulation Considerations` p. 22, left column, line 5, p. 23, right column, line 18-p. 24, left column, line 22, figures 4,5.
Katsuyama Akira
Kotabe Noriko
Kusagaya Yasuo
Osakabe Yoshio
Sato Makoto
Marcelo Melvin
Miller Jerry A.
Musacchio Pasquale
Sony Corporation
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