Multiplex communications – Wide area network – Packet switching
Patent
1990-02-26
1992-01-14
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
370 851, 370 854, 370 856, 370 8511, 370 941, 3408255, H04J 302, H04J 324
Patent
active
050816225
ABSTRACT:
A distributed queue multiple access technique is disclosed for a system comprising two counterflowing transmission busses (A,B), plural stations (i, j) connected between them, and a headend station generating slots on the first one (A) of the busses; each station transmitting access requests on the second one (B) of the busses and determining its right to transmit data in slots on the first bus on the basis of access requests it has seen. Each station maintains a FIFO queue (41) for sequential storage of numbers representing external (EXT-REQ) and local (LOC-REQ) access requests. To achieve correct timing between access requests entering the queue from the second bus and respective free slots passing a station on the first bus, a station-individual delay is introduced by maintaining in a FIFO delay storage (71) a specific number of entries. This results in an equally fair treatment for all stations, and guarantees the availability of consecutive free slots for any station which requested them.
REFERENCES:
patent: 4161786 (1979-07-01), Hopkins et al.
patent: 4210780 (1980-07-01), Hopkins et al.
patent: 4313196 (1982-01-01), Oblonsky
patent: 4510599 (1985-04-01), Ulug
patent: 4730307 (1988-03-01), Hughes et al.
patent: 4849965 (1989-07-01), Chomel et al.
patent: 4922244 (1990-05-01), Hullett et al.
patent: 4977557 (1990-12-01), Phung et al.
patent: 5001707 (1991-03-01), Kositpaiboon et al.
IEEE Proposed Standard: DQDB Metropolitan Area Network, Aug. 7, 1989, pp. 23-25.
IEEE Communications Magazine, vol. 26, No. 4, Apr. 1988, pp. 20-28, R. M. Newman et al.: "The QPSX Man".
Bux Werner K.
Muller Johann R.
Nassehi Mehdi M.
Zafiropulo Pitro A.
Zurfluh Erwin A.
Cockburn Joscelyn G.
Hsu Alpus H.
International Business Machines - Corporation
Safourek Benedict V.
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