Title page for ETD etd-0507102-202519

Document Type thesis

Author Name Phirke, Vishal Vasudeo

Email Address vishal_phirke at hotmail.com

URN etd-0507102-202519

Title Traffic Sensitive Active Queue Management for Improved Quality of Service

Degree MS

Department Computer Science

Advisors
Dr. Mark Claypool, Advisor
Dr. Robert Kinicki, Advisor
Dr. David Finkel, Advisor
Dr. Micha Hofri, Department Head

Keywords
AQM
Congestion Control
QoS

Date of Presentation/Defense 2002-04-08

Availability unrestricted

Abstract
The Internet, traditionally FTP, e-mail and Web traffic, is increasingly supporting emerging 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 traditional applications, have more stringent delay constraints and less stringent loss constraints. 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 throughput. Throughput optimization provides acceptable QoS for traditional throughput sensitive 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 applications 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 ARED in order to tune ARED for better average QoS support. Our second mechanism, REDBoston, further extends RED-Worcester to improve the QoS for all flows. Unlike earlier approaches, we do not predefine classes of service, but instead provide a continuum from which applications can choose. We evaluate our approach using NS-2 and present results showing the amount of improvement in QoS achieved by our mechanisms over ARED.

Files
phirke.pdf

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Document Type	thesis
Author Name	Phirke, Vishal Vasudeo
Email Address	vishal_phirke at hotmail.com
URN	etd-0507102-202519
Title	Traffic Sensitive Active Queue Management for Improved Quality of Service
Degree	MS
Department	Computer Science
Advisors	Dr. Mark Claypool, Advisor Dr. Robert Kinicki, Advisor Dr. David Finkel, Advisor Dr. Micha Hofri, Department Head
Keywords	AQM Congestion Control QoS
Date of Presentation/Defense	2002-04-08
Availability	unrestricted
Abstract The Internet, traditionally FTP, e-mail and Web traffic, is increasingly supporting emerging 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 traditional applications, have more stringent delay constraints and less stringent loss constraints. 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 throughput. Throughput optimization provides acceptable QoS for traditional throughput sensitive 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 applications 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 ARED in order to tune ARED for better average QoS support. Our second mechanism, REDBoston, further extends RED-Worcester to improve the QoS for all flows. Unlike earlier approaches, we do not predefine classes of service, but instead provide a continuum from which applications can choose. We evaluate our approach using NS-2 and present results showing the amount of improvement in QoS achieved by our mechanisms over ARED.
Files	phirke.pdf