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CORELA: a cooperative relaying enhanced link adaptation algorithm for IEEE 802.11 WLANs

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • D Kaleshi
  • Fan Zhong
Original languageEnglish
Title of host publication8th International Symposium on Wireless Communication Systems (ISWCS), 2011
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages382 - 386
Number of pages5
ISBN (Print)9781612844039, 9781612844015
StatePublished - 6 Nov 2011

Publication series

ISSN (Print)21540217


One of the key challenges for cooperative relaying multi-rate wireless networks is the integration and interaction of relaying with link adaptation algorithms, in particular under incomplete and/or imprecise channel state information conditions. In this paper we propose a practical cooperative relaying link adaptation medium access protocol that considers the historical link quality to enable the relay terminal to adjust its transmission relaying rate by estimating the error probability based on past packet transmission history. Simulation results show that this protocol achieves significant performance improvement in terms of end-to-end throughput and energy efficiency for different network conditions compared with other link adaptation algorithms. It also has the best performance of the direct transmission without perfect knowledge of current channel condition.

Additional information

Rose publication type: Conference contribution Sponsorship: This research is supported by Toshiba Research Europe Ltd. Terms of use: Copyright © 2011 IEEE. Reprinted with permission, from L Li, D Kaleshi, Zhong Fan; ' CORELA: A cooperative relaying enhanced link adaptation algorithm for IEEE 802.11 WLANs'; 8th International Symposium on Wireless Communication Systems (ISWCS), 2011, November 2011. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Research areas

  • cooperative relay, link adaption, MAC, 802.11

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