Accessing of transmission channels of a communication system

Multiplex communications – Wide area network – Packet switching

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455 33, 379 60, H04J 316

Patent

active

050880942

ABSTRACT:
In a communications system with a plurality of subscriber stations independent from each other, where each subscriber station can access according to a multiple access method a joint duplex transmission channel, the probability becomes very large for simultaneous attempts to get access and thereby the probability of signal destruction becomes particularly large. In order to avoid a blockage of the service channel each subscriber station occupies the duplex transmission channel with a short access signal for initiating a transmission starting with the subscriber station. The subscriber station characterized by the position in time and/or the information contents of the signalling short designation call is thereupon invited by the central base station to provide complete identification information.

REFERENCES:
patent: 3634627 (1972-01-01), Velentini
patent: 3639904 (1972-02-01), Arulpragasam
patent: 3646274 (1972-02-01), Nadir et al.
patent: 3680056 (1972-07-01), Kropfl
patent: 3790717 (1974-02-01), Abramson et al.
patent: 4096355 (1978-06-01), Rothauser et al.
patent: 4356484 (1982-10-01), Eckhardt
patent: 4414661 (1983-11-01), Karlstrom

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