6th International ICST Symposium on Modeling and Optimization

Research Article

Enhancement of the IEEE 802.15.4 MAC Protocol for Scalable Data Collection in Dense Sensor Networks

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  • @INPROCEEDINGS{10.4108/ICST.WIOPT2008.2982,
        author={Kiran  Yedavalli and Bhaskar Krishnamachari},
        title={Enhancement of the IEEE 802.15.4 MAC Protocol for Scalable Data Collection in Dense Sensor Networks},
        proceedings={6th International ICST Symposium on Modeling and Optimization},
        publisher={IEEE},
        proceedings_a={WIOPT},
        year={2008},
        month={8},
        keywords={Back Energy consumption Mathematical model Media Access Protocol Multiaccess communication Network topology Sensor systems Switches Throughput Transmitters},
        doi={10.4108/ICST.WIOPT2008.2982}
    }
    
  • Kiran Yedavalli
    Bhaskar Krishnamachari
    Year: 2008
    Enhancement of the IEEE 802.15.4 MAC Protocol for Scalable Data Collection in Dense Sensor Networks
    WIOPT
    IEEE
    DOI: 10.4108/ICST.WIOPT2008.2982
Kiran Yedavalli1,*, Bhaskar Krishnamachari1,*
  • 1: Department of Electrical Engineering - Systems, University of Southern California, Los Angeles, California, 90089
*Contact email: kyedaval@usc.edu, bkrishna@usc.edu

Abstract

We find that the IEEE 802.15.4 MAC protocol performs poorly for one-hop data collection in dense sensor networks, showing a steep deterioration in both throughput and energy consumption with increasing number of transmitters. We propose a channel feedback-based enhancement to the protocol that is significantly more scalable, showing a relatively flat, slowchanging total system throughput and energy consumption as the network size increases. A key feature of the enhancement is that the back-off windows are updated after successful transmissions instead of collisions. The window updates are based on an optimality criterion we derive from mathematical modeling of p-persistent CSMA.