UARA in edge routers: an effective approach to user fairness and traffic shaping

  • Authors:
  • Masood Khosroshahy

  • Affiliations:
  • ECE Department, Concordia University, Montreal, Canada

  • Venue:
  • International Journal of Communication Systems
  • Year:
  • 2012

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Abstract

The ever-increasing share of the peer-to-peer (P2P) traffic flowing in the Internet has unleashed new challenges to the quality of service provisioning. Striving to accommodate the rise of P2P traffic or to curb its growth has led to many schemes being proposed: P2P caches, P2P filters, ALTO mechanisms and re-ECN. In this paper, we propose a scheme named ‘UARA:textbfUser/Application-aware RED-based AQM’ which has a better perspective on the problem: UARA is proposed to be implemented at the edge routers providing real-time near-end-user traffic shaping and congestion avoidance. UARA closes the loopholes exploited by the P2P traffic by bringing under control the P2P users who open and use numerous simultaneous connections. In congestion times, UARA monitors the flows of each user and caps the bandwidth used by ‘power users’ which leads to the fair usage of network resources. While doing so, UARA also prioritizes the real-time traffic of each user, further enhancing the average user quality of experience (QoE). UARA hence centralizes three important functionalities at the edge routers: (1) congestion avoidance; (2) providing user fairness; (3) prioritizing real-time traffic. The simulation results indicate that average user QoE is significantly improved in congestion times with UARA at the edge routers. Copyright © 2011 John Wiley & Sons, Ltd. (It is perhaps best put by the authors of [28] regarding their own fair bandwidth allocation scheme: ‘Some claim that such fair allocation mechanisms open the door to denial-of-service attacks through flow-spoofing; while we do not believe such arguments are sufficient to nullify the desirability of fair-bandwidth allocations, and that this paper is not the place to delve into such arguments at length, we did want to note the existence of objections to the fair-bandwidth allocation paradigm.’)