Communications apparatus and method

H - Electricity – 04 – B

Patent

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Details

H04B 7/185 (2006.01) H04Q 7/20 (2006.01)

Patent

CA 2205618

A ground network for use in a satellite voice communications system, said system comprising at least one orbiting satellite (4), at least one earth station (6) in communication therewith, and a plurality of user voice terminals (2) in communication with the earth station (6) via a transmission path including the at least one satellite (4), each said user voice terminal including a voice codec (30) generating a digital speech signal carried over said transmission path at a first bit rate, said network comprising a plurality of nodes (6) connected with said earth station (6) and mutually interconnected by terrestrial speech channels each of which is arranged to carry a speech signal at a second bit rate, said second bit rate substantially exceeding said first, in which said network comprises a plurality of multiplexers (506) each of which is connected to receive from said earth station (6) a plurality of said digital speech signals and to multiplex them onto a lesser number of said speech channels.

L'invention est un réseau terrestre pour système de téléphonie à satellites, ce système utilisant au moins un satellite en orbite (4), au moins une station terrienne (6) en communication avec ce satellite et une pluralité de terminaux téléphoniques d'utilisateur (2) en communication avec la station terrienne (6) via un trajet de transmission passant par au moins un satellite (4), chacun de ces terminaux comportant un codec téléphonique (30) produisant un signal vocal numérique transmis via ledit trajet de transmission à un premier débit binaire, ledit réseau comportant une pluralité de noeuds (6) connectés avec ladite station terrienne (6) et mutuellement interconnectés par des canaux téléphoniques terrestres, chacun de ces canaux pouvant transmettre un signal téléphonique à un second débit binaire, lequel est substantiellement plus élevé que le premier débit binaire, ledit réseau comportant une pluralité de multiplexeurs (506) connectés chacun de façon à recevoir de ladite station terrienne (6) une pluralité de signaux téléphoniques numériques et à les multiplexer sur des canaux téléphoniques moins nombreux que les signaux.

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