Asynchronous random access communication system with collision r

Details Asynchronous random access communication system with collision r Asynchronous random access communication system with collision r

1985-11-29

1987-08-18

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 94, H04J 324

Patent

active

046882138

ABSTRACT:
An asynchronous random access system includes stations which in one embodiment transmit information as packets at random times. After a path delay, all stations receive the packets. By comparing the period of activity at the station with the known packet length, all stations know when a collision occurs. According to the system protocol, all station inhibit new transmissions for a predetermined time which includes a retransmission time. Stations whose packets were involved in the collision know that their transmission was unsuccessful, and they can also determine whether their own packets were first or last in the collision, based upon the known path delay. Retransmission of the first and last packets occurs during the retransmission interval and is guaranteed to be successful, because all other stations are inhibited. In another embodiment, evaluation of the received data is also performed to establish which packets are second and/or penultimate in collision, and they are also retransmitted according to a prescribed schedule.

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Patent Application Ser. No. 610,007 filed May 14, 1984, in the name of Raychaudhuri.

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