1. Providing QoS through Active Domain Management
Liang Guo
Quality-of-Service Networking Lab
CS Department
Boston University

2. System Overview

3. Case Study: Fairness Issues
Motivation:
Most TCP flows are short
Short flows are vulnerable to packet losses
Short flows are less responsible to congestion control
Proposal:
Giving high priority to short flows
Goal: a fair,predictable network

4. Simulation Setup Web Traffic as background
Monitor transmission time of 10 Short + 10 Long flows
Traffic Controller
Web Servers
RIO-PS queue
Clients

5. Simulation Results: Fairness Index

6. Simulation Results: Transmission Time
Short Flows
Long Flows
New scheme produces less “outliers”

7. Experiment Setup

8. Future Works Performance Evaluation of Differentiated Services
Fairness-oriented Active Domain Management
Real-time Scheduling
Traffic Controller Design
Other Layer-7 Switching Techniques
FOR MORE INFO...
Quality-of-Service Networking Laboratory
Computer Science Dept., Boston University
Copyright 2001