Improved backoff algorithm for IEEE 802.15.4 wireless sensor networks

Bilal Muhammad Khan, Falah H. Ali, Elias Stipidis

    Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBNpeer-review


    In wireless sensor networks (WSN) the medium access control CSMA/CA uses binary exponential backoff (BEB) algorithm to minimize collision among the contending nodes. The range of backoff exponent is limited to very small values. This causes channel access collision among the nodes resulting in degradation of quality of service. In this paper improved binary exponential backoff (IBEB) algorithm is proposed using interim backoff (IB) and unit interim period (IP) to minimize channel access collision by randomly waking up within the backoff time to sense the channel. The result shows that IBEB outperforms significantly the existing BEB algorithm employed in the IEEE 802.15.4 MAC standard as well as Linear/Multiplicative Increase and Linear Decrease (LMILD) and Multiplicative Increase Linear Decrease (MILD) schemes on variable network load and size.

    Original languageEnglish
    Title of host publication2010 IFIP Wireless Days, WD 2010
    Publication statusPublished - 1 Dec 2010
    Event2010 IFIP Wireless Days, WD 2010 - Venice, Italy
    Duration: 20 Oct 201022 Oct 2010


    Conference2010 IFIP Wireless Days, WD 2010


    • Binary Exponential Backoff
    • CSMA/CA
    • MAC
    • WSN


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