Access protocol for ultra-wide coherent optical local network fo

Details Access protocol for ultra-wide coherent optical local network fo Access protocol for ultra-wide coherent optical local network fo

1990-07-06

1992-12-15

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

359118, 359120, 359121, H04L 1244

Patent

active

051723743

ABSTRACT:
The present invention relates to a UCOL-type star network, comprising a central unit or passive star center and a plurality of depending stations intercommunicating via two-way optical fiber link channels, in which an access protocol generated by the stations linked to the star center shows a frame structure cyclically repeating every millisecond, and is shared in at least three parts where in the first one, informations related to frame beginning are idividuated, in the second one informations related to priority queues status are individuated, which informations allow to determine which station has access to the network, and are inherent to priority classes allowing to manage the various kinds of synchronous and asynchronous traffic, as well as a third part in which there is the information content to be transmitted, the whole under a constant control on data flow synchronism, in order to avoid a mutual data overlapping and to allow the sending of various kinds of traffic on the same channel, upon initialization of each station with an own time information depending on its distance from the star center.

REFERENCES:
patent: 4813012 (1989-03-01), Valeri et al.
"Broadband Local and Metropolitan Area Networks in an IBCN Environment", S. Treves, Ninth International Conference on Computer Communication, Oct. 1988, pp. 373-378.

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