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Predictable performance optimization for wireless networks

Published: 17 August 2008 Publication History

Abstract

We present a novel approach to optimize the performance of IEEE 802.11-based multi-hop wireless networks. A unique feature of our approach is that it enables an accurate prediction of the resulting throughput of individual flows. At its heart lies a simple yet model of the network that captures interference, traffic, and MAC-induced dependencies. Unless properly accounted for, these dependencies lead to unpredictable behaviors. For instance, we show that even a simple network of two links with one flow is vulnerable to severe performance degradation. We design algorithms that build on this model to optimize the network for fairness and throughput. Given traffic demands as input, these algorithms compute rates at which individual flows must send to meet the objective. Evaluation using a multi-hop wireless testbed as well as simulations show that our approach is very effective. When optimizing for fairness, our methods result in close to perfect fairness. When optimizing for throughput, they lead to 100-200% improvement for UDP traffic and 10-50% for TCP traffic.

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Published In

cover image ACM Conferences
SIGCOMM '08: Proceedings of the ACM SIGCOMM 2008 conference on Data communication
August 2008
452 pages
ISBN:9781605581750
DOI:10.1145/1402958
  • cover image ACM SIGCOMM Computer Communication Review
    ACM SIGCOMM Computer Communication Review  Volume 38, Issue 4
    October 2008
    436 pages
    ISSN:0146-4833
    DOI:10.1145/1402946
    Issue’s Table of Contents
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 17 August 2008

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Author Tags

  1. interference
  2. modeling
  3. multi-hop wireless networks
  4. optimization

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  • Research-article

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SIGCOMM '08
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SIGCOMM '08: ACM SIGCOMM 2008 Conference
August 17 - 22, 2008
WA, Seattle, USA

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Overall Acceptance Rate 462 of 3,389 submissions, 14%

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