System and method for low latency communication

H - Electricity – 04 – J

Patent

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Details

H04J 3/14 (2006.01) H04L 29/08 (2006.01) H04M 3/00 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2340679

A low latency, high throughput communication system applicable to real-time communications, such as real-time audio and video, controls the total in- transit data between a transmitting application and a receiving application to a target amount using feedback. As a result, the system operates at about the same throughput as it does when modem (52) and other buffers associated with the system are always full, but at a substantially lower latency and with the modem and other buffers less than full. The system is applicable to both modem- to-modem telephone communications and internet communications in accordance with the TCP and UDP protocols. The system includes a forward error correction and retransmission scheme for use with the UDP protocol, and also includes a scheduling protocol for use in association with virtual channels.

On décrit un système de communication à faible temps d'attente et grande capacité, qui convient pour des communications en temps réel, telles que des communications de données audio ou vidéo. Ce système met en oeuvre une rétroaction pour contrôler la totalité d'une quantité cible des données en transit entre une application de transmission et une application de réception. En conséquence, le système tourne à environ la même capacité de fonctionnement que lorsque le modem (52) et les autres tampons qui lui sont associés sont saturés, mais avec un temps d'attente sensiblement plus faible et un modem et des tampons non saturés. Le système convient tant pour des communications téléphoniques modem à modem que pour des communications par Internet mettant en oeuvre des protocoles TCP ou UDP. Le système inclut un programme de correction d'erreur sans voie de retour et de retransmission qui s'utilise avec le protocole UDP. Il inclut en outre un protocole de répartition pouvant être utilisé en association avec des canaux virtuels.

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