Added bit signalling in a telecommunications system

Details Added bit signalling in a telecommunications system Added bit signalling in a telecommunications system

H - Electricity

04

J

H04J 3/00 (2006.01) H04J 3/06 (2006.01) H04J 3/12 (2006.01) H04J 3/14 (2006.01) H04J 3/16 (2006.01)

Patent

CA 2164867

A telecommunication system includes an added bit signalling method and apparatus for conveying signalling information between a head end (300) and multiple remote ends (500) connected over a passive distribution network. In accordance with the present invention, an added bit (NB) having an identifiable data sequence patterned thereon is appended to each channel within a succession of frames. The present invention therefore appends an added-bit sequence to each channel such that each channel sample carries its own multiframe and alignment information. The remote ends monitor the added bits to locate multiframing and alignment information and to identify individual tune slots within each frame. The added bit can be further utilized for out-of-band signalling or to provide an additional data links.

Système de télécommunications utilisant une méthode de signalisation par bit additionnel et appareil transmettant des signaux entre une station centrale (300) et plusieurs stations éloignées (500) par l'intermédiaire d'un réseau passif de distribution. Dans la présente invention un bit additionnel (NB) marqué par une séquence identifiable de données est ajouté à chacun des canaux à l'intérieur d'une succession de trames. La présente invention ajoute donc une suite de bits additionnels à chacun des canaux de sorte que chacun des échantillons de canaux porte son propre signal de verrouillage de multitrame. Les stations éloignées détectent les bits additionnels pour localiser les signaux de verrouillage de multitrame et identifier les intervalles de temps propres à chaque trame. Le bit additionnel peut de plus servir pour une signalisation hors bande ou constituer un canal additionnel de transmission de données.

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