Optical passive bus control system

Details Optical passive bus control system Optical passive bus control system

1982-05-27

1985-05-07

Shaw, Gareth D.

Boots, shoes, and leggings

350 9616, G06F 304, G06F 1516, G02B 514

Patent

active

045162042

ABSTRACT:
An optical passive bus control system includes an access coordinator and control unit which is connected to the passive network in the same manner as other connected devices of the network. The access coordinator control means is located spatially close to the optical mixer, over connecting light wave guides which are as short as possible. The access coordinator and control unit contains a collision recognition device for recognizing an access collision, and includes means for implementing an asynchronous access operating mode in response to a collision recognition. A switch means is provided for emitting a signal to the bus, signifying a change to a synchronous operating mode in which no access collisions can occur.

REFERENCES:
patent: 4063220 (1977-12-01), Metcalfe et al.
patent: 4249266 (1981-02-01), Nakamori
patent: 4366565 (1982-12-01), Herskowitz
patent: 4390944 (1983-06-01), Quackenbush et al.
patent: 4422179 (1983-12-01), Albanese
patent: 4430699 (1984-02-01), Segarra et al.
patent: 4446515 (1984-05-01), Sauer et al.
Taylor et al., "Data Busing with Fiber Optics", Naval Electronics Laboratory Center, Feb. 1975, pp. 12-24.

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