Communication link contention resolution system

Details Communication link contention resolution system Communication link contention resolution system

1985-07-02

1987-06-02

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370100, 34082551, 375107, H04J 302, H04J 306, H04L 700

Patent

active

046708723

ABSTRACT:
Each of a plurality of programmable master devices having access to a data communication link is assigned a unique address based on the priority of that master device. The unique address of each master device is loaded into an associated counter when a link contention signal is impressed on the link by one of the master devices, and all counters begin counting down at the same time and at the same rate when the contention signal is terminated, whereby the counter with the lowest number address times out first and its associated master device can gain access to the data link. The unique address of each master device thus provides a way for higher priority master devices to lock out lower priority master devices so as to prevent simultaneous transmission on the data link and also to prevent loss of high priority data.

REFERENCES:
patent: 4149144 (1979-04-01), Diefenderfer
patent: 4156112 (1979-05-01), Moreland
patent: 4241444 (1980-12-01), Kister
patent: 4313196 (1982-07-01), Oblonsky
patent: 4359731 (1982-11-01), Beauford et al.
patent: 4458314 (1984-07-01), Grimes

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