Data transmission system of the star type with enablement passin

Details Data transmission system of the star type with enablement passin Data transmission system of the star type with enablement passin

1984-04-16

1987-12-29

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

370 85, 370 96, 34082507, H04Q 100

Patent

active

047164085

ABSTRACT:
A network provides communication between end units (1). Each end unit (1) received an entitlement to transmit in the form of a go-ahead. It is then able to transmit a frame of user data, which is broadcast by a central unit (7) to all other end units (1). When the end unit (1) transmitting the frame wishes to relinquish its entitlement to transmit it regenerats the go-ahead, which is passed by the central unit (7) to the next end unit (1) taking them in a predtermined cyclic sequence. The system allows frames to be acknowledged: the central unit (7) collects acknowledgements from end units (1) receiving the frame successfully, and when every expected station has acknowledged, returns an acknowledgement to the source end unit (1). Central units (1) may be combined to form larger systems.

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Andrews et al., "A Token-Ring Architecture for Local-Area Networks: An Update", Fall, 1982, 25 IEEE Computer Society International Conference.
Cheng et al., "Illinet-A32M Bits/Sec. Local-Area Network", AFIPS conference Proceedings, National Computer Conference, May 4-7, 1981.
Albanese, "Star Network with Collision-Avoidance Circuits", Bell System Technical Journal, vol. 62 (3/83), No. 3, Part 1, pp. 631-638.

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