A method and a device for delay reduction in a communication...

H - Electricity – 04 – Q

Patent

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H04Q 11/04 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2314908

A method and a device for reduction of the total delay of ATM traffic in a communication network where a multitude of nodes (2-4) share a common time multiplex physical medium (5) for transmitting ATM cells in an uplink direction (6). The nodes (2-4) comprise a circuit emulator (11) where the ATM cells which are to be transmitted are packed and a network terminal (8) comprising at least one PLL (27), a phase detector (26) and preferably a phase delay unit (24). The nominal frequency for the allocated time slots on the physical medium (5) is the same as the frequency for generation of the ATM cells. By using the above components the generation of ATM cells will be locked in frequency and phase to the allocated time slots in order to minimize the waiting time in the buffer (26) of the node.

L'invention concerne un procédé et un dispositif de réduction du délai total du trafic MTA dans un réseau de communication dans lequel plusieurs noeuds (2-4) partagent un support physique multiplexeur temporel commun (5) pour la transmission des cellules MTA dans une direction de liaison montante (6). Les noeuds (2-4) comprennent un émulateur de circuit (11) dans lequel les cellules MTA à transmettre sont mises en paquets, et un terminal réseau (8) comprenant au moins une boucle PLL (27), un détecteur de phase (26) et, de préférence, une unité fondée sur le délai de phase (24). La fréquence nominale des créneaux temporels alloués au support physique (5) est identique à la fréquence de génération des cellules MTA. En utilisant les composantes susmentionnées, la génération de cellules MTA sera verrouillée en fréquence et en phase aux créneaux temporels alloués afin de réduire le temps d'attente dans le tampon (26) du noeud.

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