End-To-End Quality of Service Control Using Adaptive Applications

Abstract

Many distributed multimedia applications exhibit flexibilityto fluctuations in the network conditions. By trading off temporal andspatial quality to available bandwidth, or manipulating the playout timeof continuous media in response to variations in delay, multimedia flowscan keep an acceptable QoS level at the end systems. In this study, wepresent a new scalable scheme for adapting the transmission rate ofmultimedia applications to the congestion level of the network. Thescheme is based on the end to end real time transport protocol (RTP).Using the proposed scheme, we investigate the efficiency of applyingadaptation in utilizing network resources, reducing losses and thescalability of the scheme as well as that of the RTP protocol. Theresults obtained through simulations suggest the efficiency of thescheme in utilizing the network resources and decreasing the lossrates.