Repeat request signal transmission method for multi-station pack

Details Repeat request signal transmission method for multi-station pack Repeat request signal transmission method for multi-station pack

1988-07-07

1989-12-19

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 60, 370 941, H04J 316

Patent

active

048887676

ABSTRACT:
In a network wherein all the receive stations connected to a radio link or a bus type wire link are capable of observing information which is being transmitted over the link, a method of allowing each receive station to send back a repeat request signal in multi-station packet communication in which a single transmit station transmits the same message to a plurality of receive stations. The same number of frequencies as packets are used so that a sinusoidal wave having a particular one of the frequencies which is associated with a packet with an error is sent. Alternatively, the same number of time slots as packets are set up so that a burst signal is sent as a repeat request signal in a particular one of the time sots which is associated with information on a packet with an error. Utilizing the fact that the signals to be sent are repeat request signals, the method insures accurate delivery of retransmit request information to the transmit station even if repeat request signals sent back at the same time are in a conflict.

REFERENCES:
patent: 4376278 (1983-03-01), Jacobsthal
patent: 4397020 (1983-08-01), Howson
patent: 4507782 (1985-03-01), Kunimasa et al.
patent: 4542507 (1985-09-01), Read
patent: 4617657 (1986-10-01), Drynan et al.
IEEE Transactions on Communications, vol. COM-29, No. 11, 11/81, "A Broadcast Protocol for File Transfers to Multiple Sites".
IEEE Transactions on Communications, vol. COM-32, No. 6, 6/84, "An Improved Broadcast Retransmission Protocol".

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