Multiplex communications – Wide area network – Packet switching
Patent
1993-06-08
1995-05-09
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 92, 34082552, H04L 1240
Patent
active
054134110
ABSTRACT:
A local network including no more than eight stations, each station being able to be both a source and a sink for data, and, thus being able both to receive and emit a message, the stations being interconnected by a serial bus and providing data to a distributed data base, which data is renewed cyclically under the control of a request generator that emits requests in the form of binary messages. The stations have addresses in the form of bytes respectively constituted by bytes of binary numbers representing powers of 2 in the range 0 to 7, a binary message emitted by the request generator containing the addresses, of all the stations designated to be sinks for the emitted binary message, in the form of a composite byte constituted by an OR UNION of the addresses of the stations designated to be sinks, a station thus observing that it is chosen as a sink by performing an AND INTERSECTION between the composite byte and the station's own address byte.
REFERENCES:
patent: 3912872 (1975-10-01), Callens
patent: 4347541 (1982-08-01), Cheu et al.
patent: 4928097 (1990-05-01), Staab et al.
patent: 4991171 (1991-02-01), Teraslinna et al.
patent: 5051720 (1991-09-01), Kittirutsunetorn
patent: 5132967 (1992-07-01), Kalajainen
patent: 5172373 (1992-12-01), Suzuki
Patent Abstracts of Japan, vol. 11, No. 280 (E-539) Sep. 10, 1987 & JP-A-62 078 931 (NEC Corp.) Apr. 11, 1987.
GEC Alsthom T&D SA
Nguyen Chau T.
Olms Douglas W.
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