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A successive transmission medium access scheme with dynamic contention window for VLC system with saturated traffic

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Abstract

The visible light communication (VLC) network is usually relatively small scale and can provide high-data-rate information transmission, where multiple users get access to the network according to the carrier sense multiple access with collision avoidance (CSMA/CA) mechanism specified by IEEE 802.15.7 standard. In this paper, we propose a novel dynamic contention window with successive transmission (DCW-ST) scheme to improve the performance of this channel access mechanism and to achieve better network throughput without delay performance degradation. Specifically, we propose to adjust the contention window dynamically to adapt to the time-changing network size. Further, we derive the contention window size to achieve trade-off of throughput and delay, and the minimum contention window size required for the throughput enhancement. In addition, in order to further improve the delay performance, we present a successive transmission scheme that allows the nodes which have completed one transmission successfully to get the chance of transmitting information successively according to the network condition. Simulations are performed for the VLC system in saturated traffic and compared with the theoretical performances, which demonstrate that our proposed scheme outperforms the legacy CSMA/CA of IEEE 802.15.7.

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Acknowledgments

The funding supports from the Normal Project (No. 20150207) of SYSU-CMU Shunde International Joint Research Institute, Science and Technology Program Project (No. 2014A050503039) of Guangdong Province, National Science Fundation (No. 61572534) are gratefully acknowledged.

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Authors and Affiliations

  1. School of Electronics and Information Engineering, Sun Yat-sen University, Guangdong, China

    Heting Liu & Lin Zhang

  2. Department of Electrical Engineering, Wright State University, Dayton, OH, USA

    Zhiqiang Wu

Authors
  1. Heting Liu
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  2. Lin Zhang
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  3. Zhiqiang Wu
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Correspondence to Lin Zhang.

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Liu, H., Zhang, L. & Wu, Z. A successive transmission medium access scheme with dynamic contention window for VLC system with saturated traffic. Photon Netw Commun 34, 63–74 (2017). https://doi.org/10.1007/s11107-016-0657-9

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  • DOI: https://doi.org/10.1007/s11107-016-0657-9

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