Quality of service (QoS) for video transmission

Abstract

This paper evaluates QoS techniques for transmission of real-time video that use a DiffServ mechanism that includes an efficient bandwidth agent to allocate bandwidth on heterogeneous networks, a Hierarchical Token Bucket (HTB) queuing scheme at the output interface of Linux-based routers, and a policing mechanism at the incoming interface of the edge router (ER) in a Linux-based testbed. The testbed consists of several different networks including IEEE 802.11b to find the characteristics of real-time video traffic using MPEG streaming video and VLC for server/client so that we will have a good idea what bandwidth and burst size is required to stream MPEG video through the QoS Diffserv domain. We set an efficient testbed to investigate how real-time streams behave in the QoS scheme, and to provide a realistic recommendation to manage the available bandwidth for both the QoS provider and clients.