Method of and system for implementing multiple levels of asynchr

Details Method of and system for implementing multiple levels of asynchr Method of and system for implementing multiple levels of asynchr

1991-10-03

1992-06-02

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 856, 370 8515, 34082551, H04J 322, H04J 302

Patent

active

051193744

ABSTRACT:
The standard FDDI priority algorithm is implemented by programming Token Holding Time (THT) threshold values for asynchronous service either in an increasing or decreasing order as a function of token holding time. If the thresholds are programmed in a decreasing order, all higher priority data is sent to the network before any lower priority data is sent. If the thresholds are programmed in an increasing order, highest priority data is sent first, until the unexpired token holding time falls below the threshold value for that priority; the next lower priority level data then is transmitted, and so on. Accordingly, at least some data of all priority assignments pending for transmission are sent to the medium during each token capture.

REFERENCES:
patent: 4404557 (1983-09-01), Grow
patent: 4459588 (1984-07-01), Grow
patent: 4667323 (1987-05-01), Engdahl et al.
patent: 4677612 (1987-06-01), Olson et al.
patent: 4930121 (1990-05-01), Shiobara

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