Análisis de las técnicas de descarte selectivo de paquetes en mecanismos de gestión activa de colas para la transmisión de video en tiempo real.

Abstract

The research aims, the proposal of a guide for the configuration of a mechanism for active management of queues in order to improve the QoS (Quality of Service) for video transmission in real time. A study was conducted with a design of experimental research, to analyze the selective packet discard WRED (Early Random Weighted Detection), in the following mechanisms of active queue management: CB - WFQ (Weighted Queue Management), LLQ (Queue Management Low Latency) and RTP priority (Multistage Queue Management); for which it was implemented a testing environment that sim ulates a LAN (Local Area Network) and WAN (Wide Area Network) with 4 network alternatives: No congestion; congestion at 30%; congestion at 50% and congestion at 80%; parameters analyzed were: Latency, Jitters, % of packet loss and bandwidth; a selection of devices was performed, the interconnection between them was configured, once the connection is established, we proceeded with the configuration of QoS policies for active queue management allows determining the traffic circulating through the network, fol lowing this sequence defined in the prepared guide, it was observed that the behavior of mechanisms for active queue management with LLQ latency is reduced by 40%, the time Jitters are reduced by 50%, the percentage of loss of packet, disappears and the ba ndwidth is reduced by 42%, being this mechanism the best alternative. Once chi - square test in the goodness of fit, it was demonstrated that the null hypothesis is rejected and that the development and use of this proposal, improved quality of service in a 90%.