An Improved Backoff Scheme for the IEEE 802.15.4 MAC Protocol

Qiao Guan Hua; Mao Jian Lin; Guo Ning; Chen Bo; Dai Ning; Zhang Chuan Long

doi:10.4028/www.scientific.net/AMM.427-429.2622

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 427-429An Improved Backoff Scheme for the IEEE 802.15.4...

An Improved Backoff Scheme for the IEEE 802.15.4 MAC Protocol

Abstract:

To solve the impact on network performance by the mobile nodes and data transfer rate constantly changing,this paper proposes a improved backoff scheme for IEEE802.15.4, which uses Probability Judgement based on Network Load and Exponentially Weighted Moving Average (PJNL_EWMA). According to a real-time monitoring of current network status by probability judgement of network load , this method dynamically adjust backoff exponent by EWMA when the CSMA/CA begins. Compared the IEEE802.15.4 and MBS+EWMA schemes, the simulation experiments on NS2 platform show that the PJNL_EWMA scheme not only improves the throughput of the network, but also reduces the packet loss rate and the collision ratio,significantly improve the network performance.

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Periodical:

Applied Mechanics and Materials (Volumes 427-429)

Pages:

2622-2625

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.427-429.2622

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Online since:

September 2013

Authors:

Qiao Guan Hua*, Mao Jian Lin, Guo Ning, Chen Bo, Dai Ning, Zhang Chuan Long

Keywords:

Collision Ratio, CSMA/CA, EWMA, IEEE802.15.4, Throughput

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* - Corresponding Author

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