H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 3/16 (2006.01) H04Q 3/62 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2317708
In a transmitting node (3) in a transmission system, a plurality of source signals are multiplexed by a multiplexer (34) into a multiplex signal. The multiplex signal is transmitted to a receiving node (5) where it is demultiplexed in the source signals. The multiplex signal comprises a plurality of packets having a flag field, a length field, a connection ID field and a data field. The flag field can be present to enable the receiver to find the beginning of the packet or to carry non-urgent control signals. According to the present invention, the length of the flag field is dependent on the aggregate bitrate of the source signals, making it possible that more source signals can be transmitted over the transmission link under heavy traffic conditions.
L'invention concerne un système de transmission qui comporte un noeud de transmission (3) dans lequel un multiplexeur (34) assure le multiplexage des signaux d'origine dans le signal multiplex. Ce dernier est transmis à un noeud de réception (5) dans lequel ledit signal est démultiplexé dans les signaux d'origine. Le signal de multiplex comprend une pluralité de paquets contenant un champ indicateur, un champ longueur, un champ identification de connexion et un champ données. Le champ indicateur peut éventuellement permettre au récepteur de trouver le début du paquet ou de transporter des signaux de commande non urgents. Selon l'invention, la longueur du champ indicateur dépend du débit global des signaux d'origine, ce qui permet de transmettre un plus grand nombre de signaux d'origine sur la liaison de transmission dans des conditions de trafic difficiles.
Fetherstonhaugh & Co.
Koninklijke Philips Electronics N.v.
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