Optimization of P2P-TV traffic by means of header compression and multiplexing

Abstract

Abstract-This paper studies the optimization of the traffic of a P2P-TV application (SOPCast). First, a traffic characterization is deployed, and it is observed that the service generates a high rate of small UDP packet bursts between peers. Then, an optimization method based on header compression and multiplexing is used for sending together the packets with the same destination. Two multiplexing policies are defined and tested. The first one is based on a fixed multiplexing period, and the other one defines an interpacket time threshold, with the aim of multiplexing together a whole traffic burst. Simulations using real traffic traces of SOPCast are performed in order to estimate the expected savings for both policies. The results show that the efficiency is improved, achieving uplink bandwidth savings between 26% and 33% for the period-based policy, and roughly 35% for the policy based on a threshold. The amount of packets per second is also reduced by a factor of 10 in both cases. As a counterpart, the addition of a small retention delay is necessary, but the tests show that it does not impair user's experience.

El impacto del buffer en la calidad de servicio

“…Esta aplicación tiene un overhead bastante alto, ya que, cerca del 60 % de los paquetes que generan son de señalización y solo el 40 % corresponde a datos de video [98]. El comportamiento del tráfico de un peer se caracterizó en [99], descubriendo que un cliente SopCast envía un paquete UDP de confirmación por cada paquete de video recibido, generando una cantidad considerable de paquetes pequeños en el enlace ascendente del cliente, además, el flujo de paquetes de confirmación influye negativamente en el tráfico de video que dicho peer envía hacia otros, ya que ambos flujos competirán en el enlace de subida.…”

Self-organizing Community Learning Based on P2P Network in a University Computer Foundation Course

“…Wang and others [4] added a new application layer to UDP to improve the QOS assurance capability of UDP, reduce the demand for the network and improve the scalability of the method; the traffic volume of the entire network is reduced by compressing and reusing data packet head. QuintanaRamirez et al [5] illustrated that the disadvantage of the application layer was that the processing time was increased and the average delay of the packet was delayed.…”

Performance evaluation and implementation of IP and robust header compression schemes for TCP and UDP traffic in static and dynamic wireless contexts

“…Both [16] and [45] successfully apply RoHCv1 to Aeronautical Networking and [2] to IP tunnel compression, while [27], [23], [33] and [22] propose aggregation in order to improve header compression in mesh networks among other uses. [34] employs header compression to optimise P2P-TV transmission by up to 35 %.…”