Wireless Network Support for Adaptive Real-Time Applications
Margaritis Margaritidis, George C. Polyzos · 1999
We evaluate MobiWeb, a proxy-based network architecture designed to enhance the performance of adaptive real-time streams over wireless Internet links. MobiWeb includes a priority scheme that preserves media smoothness despite short-term fluctuations of the link, as well as an adaptation mechanism applied to streams responding to long- term link changes. A set of timers permits the rapid exploration of the link, increasing the utilization of resources when they are abundant, while forcing enhanced streams to back-off to more moderate resource usage when resources are scarce. MobiWeb uses admission control for real-time traffic in order to provide a base level of quality, while remaining fair and transparent to unaware, best-effort traffic. This paper validates the enhanced performance of adaptive real-time streams when MobiWeb is used, through the evaluation of several scenarios simulated on NS - the Network Simulator tool.