Data packet transmission using shared channel

Details Data packet transmission using shared channel Data packet transmission using shared channel

1984-02-21

1987-02-03

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

370 85, H04Q 1104, H04J 302

Patent

active

046413073

ABSTRACT:
In a data communication system an interface unit connects a device to a common communications channel shared with other devices using e.g. a carrier-sense multiple-access protocol. Individual bytes for a predetermined destination device are supplied by the device to communications controller 6 without any grouping into packets. They are then stored in a RAM 8 under control of a microcomputer 5. As soon as a byte is received, the interface unit attempts to transmit a packet; when the right to transmit is won the interface unit transmits a packet containing that and any subsequent bytes. The length of the packet therefore depends on the delay before a packet can be transmitted, and hence on the loading on the channel.

REFERENCES:
patent: 4357425 (1983-06-01), El-Golary
patent: 4535448 (1985-08-01), Baxter et al.
patent: 4568930 (1986-02-01), Livingston et al.
"Dual-chip sets forge vital link for Ethernet local-network scheme", Electronics, Oct. 6, 1982, pp. 89-103.

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