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An Improvement of Slotted CSMA/CA Algorithm in IEEE 802.15.4 Medium Access Layer

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Abstract

The standard of IEEE 802.15.4 is able to achieve low-power transmissions in low-rate and short-distance wireless personal area networks. It employs the slotted carrier sense multiple access with collision avoidance (CSMA/CA) for the contention mechanism. The blind backoff process in the slotted CSMA/CA will cause lower channel utilization. Sensor node performs backoff process immediately when the clear channel assessment (CCA) detecting busy channel. It may neglect the implicit information of CCA failed detection and further cause the redundant senses. This paper proposes an additional carrier sensing (ACS) algorithm based on IEEE 802.15.4 to enhance the carrier sensing mechanisms in original slotted CSMA/CA. An analytic model is developed to evaluate the performance of ACS algorithm. The analytical and simulation results demonstrate that the proposed scheme significantly improves the throughput, average medium access control delay and power consumption of CCA detecting.

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Authors and Affiliations

  1. Department of Electronic Engineering, JinWen University of Science and Technology, No. 99, An-Chung Rd., Hsin-Tien City, Taipei County, 23154, Taiwan

    Chi-Ming Wong

  2. Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan

    Bi-Huang Lee

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  1. Chi-Ming Wong
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  2. Bi-Huang Lee
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Correspondence to Chi-Ming Wong.

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Wong, CM., Lee, BH. An Improvement of Slotted CSMA/CA Algorithm in IEEE 802.15.4 Medium Access Layer. Wireless Pers Commun 63, 807–822 (2012). https://doi.org/10.1007/s11277-010-0166-6

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  • DOI: https://doi.org/10.1007/s11277-010-0166-6

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