Distributed bus arbitration method and apparatus

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G06F 946

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active

044020406

ABSTRACT:
A bus interconnects a plurality of elements to form a distributed signal processing system. When two or more elements attempt to use the bus simultaneously, a method of arbitration occurs whereby each element places its element arbitration code on assigned lines of the bus forming a composite complementary code. Arbitration apparatus in each element determines an element's priority relative to other elements based on said composite complementary code. The lower priority elements drop off the bus until only the highest priority is left whereupon it uses the bus to transmit its block of data. The distributed aribration apparatus has special advantage in a fault-tolerant system where it is critical that single point failures do not cause the complete system to f

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patent: 4096572 (1978-06-01), Namimoto
patent: 4153934 (1979-05-01), Sato
patent: 4229791 (1980-10-01), Levy et al.
Hansen, Stan, ORed Busing Features Distributed Control, Electronic Design, Aug. 16, 1980, pp. 143-147.

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