Patent · US Expired

Accessing of transmission channels of a communication system

US4815073A · kind A · utility

35Cited by

3References

20Claims

0Family size

Assignee

Philips Kommunikations Industrie Aktiengesellschaft · DE

Inventors

Christoph Grauel · Feucht, DE
Werner Schmidt · Chemnitz, DE

Key dates

Filing date	Jul 15, 1986
Grant date	Mar 21, 1989
Priority date	—
Expiry date	Jul 15, 2006

Classification

Technology area (CPC H)Electricity
CPC primaryH04W74/0866
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

In a communications system with a plurality of subscriber stations independent of each other, where each subscriber station can access a joint duplex transmission channel according to a multiple access method, the probability of simultaneous attempts to get access becomes very image, and thereby the probability of signal destruction is particularly increased. 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 from the subscriber station. The subscriber station characterized by the position in time and/or the information contents of the short access signal is thereupon invited by the central base station to emit an access signal to join practical access to the communication exchange.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.