An Improvement of Slotted CSMA/Ca in IEEE 802.15.4

Jin Hong Wang; Li Jun Sun

doi:10.4028/www.scientific.net/AMR.926-930.2767

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 926-930An Improvement of Slotted CSMA/Ca in IEEE 802.15.4

An Improvement of Slotted CSMA/Ca in IEEE 802.15.4

Abstract:

IEEE802.15.4 defines MAC and PHY specification for low-rate wireless personal area networks (LR-WPANS), which targets wireless networking among low-rate, low-power and low-cost devices for short range telecommunication. As the wireless sensor network used in ward monitoring system need to handle large amounts of data, this paper proposes an improved backoff algorithm in slotted CSMA/CA by introducing a weighting algorithm of. According to the comparison of and , we can dynamic change the minimum contention window each time at CSMA/CA begins. By NS2 simulation, when the traffic load is large, the delay time, packet loss rate and jitter of the improved dynamic algorithm can be significantly reduced.

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Periodical:

Advanced Materials Research (Volumes 926-930)

Pages:

2767-2770

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.926-930.2767

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Online since:

May 2014

Authors:

Jin Hong Wang*, Li Jun Sun

Keywords:

CSMA/CA, Dynamic Weighting Algorithm, Heavy Load, IEEE802.15.4

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References

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