Data transmission system using sending right request signal tran

Details Data transmission system using sending right request signal tran Data transmission system using sending right request signal tran

1988-11-04

1989-08-22

Griffin, Robert L.

Communications: electrical

Continuously variable indicating

With meter reading

34082505, 370 89, 370 86, 370 92, H04Q 900, G06F 1300, H04J 306

Patent

active

048600008

ABSTRACT:
A data transmission system comprising a unidirectional loop transmission path to which a plurality of communication equipment are coupled. Each communication equipment operates to relay and send a signal including a data signal received from other communication equipment located upstream to those located downstream via the transmission path. An arbitrary communication equipment which requests for the sending right adds a code indicating a priority level of the sending right to a sending right request signal and sends this code-added sending right request signal. Each communication equipment includes a circuit which delays the received signal by a predetermined time shorter than a frame time and sends the signal thus delayed. In this manner, when an arbitrary communication equipment requests the sending right, the circuit operates to compare the received priority level code with the priority level code assigned to itself to send the priority level code assigned to itself instead of the received priority level code when the priority level assigned to itself is higher than that of the code of the received signal.

REFERENCES:
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patent: 4439856 (1984-03-01), Ulug
patent: 4470110 (1984-09-01), Chiarottino et al.
patent: 4472712 (1984-09-01), Ault et al.
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patent: 4593280 (1986-06-01), Grow
patent: 4642630 (1987-02-01), Beckner et al.
patent: 4675671 (1987-06-01), Ishizuka et al.

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