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Traffic Sensitive Active Queue Management for Improved Quality of Service

By Vishal Phirke


The Internet, traditionally FTP, e-mail and Web traffic, is increasingly supporting emerg-ing applications such as IP telephony, video conferencing and online games. These new genres of applications have different requirements in terms of throughput and delay than traditional applications. For example, interactive multimedia applications, unlike tra-ditional applications, have more stringent delay constraints and less stringent loss con-straints. Unfortunately, the current Internet offers a monolithic best-effort service to all applications without considering their specific requirements. Adaptive RED (ARED) is an Active Queue Management (AQM) technique, which optimizes the router for through-put. Throughput optimization provides acceptable QoS for traditional throughput sensi-tive applications, but is unfair for these new delay sensitive applications. While previous work has used different classes of QoS at the router to accommodate applications with varying requirements, thus far all have provided just 2 or 3 classes of service for ap-plications to choose from. We propose two AQM mechanisms to optimize router for better overall QoS. Our first mechanism, RED-Worcester, is a simple extension to ARE

Year: 2002
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