5th International ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness

Research Article

Leveraging Spatial Reuse with Adaptive Carrier Sensing in 802.11 Wireless Networks

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  • @INPROCEEDINGS{10.4108/ICST.QSHINE2008.3840,
    author={Qiang Shen and Xuming Fang and Rongsheng Huang and Pan Li and Yuguang Fang},
    title={Leveraging Spatial Reuse with Adaptive Carrier Sensing in 802.11 Wireless Networks},
    proceedings={5th International ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness},
    publisher={ICST},
    proceedings_a={QSHINE},
    year={2010},
    month={5},
    keywords={Medium Access Control (MAC) spatial reuse carrier sensing interference},
    doi={10.4108/ICST.QSHINE2008.3840}
}
  • Qiang Shen
    Xuming Fang
    Rongsheng Huang
    Pan Li
    Yuguang Fang
    Year: 2010
    Leveraging Spatial Reuse with Adaptive Carrier Sensing in 802.11 Wireless Networks
    QSHINE
    ICST
    DOI: 10.4108/ICST.QSHINE2008.3840
Qiang Shen1,2,*, Xuming Fang1,*, Rongsheng Huang2,*, Pan Li2,*, Yuguang Fang2,*
  • 1: Provincial Key Lab of Information Coding and Transmission, Southwest Jiaotong University, Chengdu, 610031 P. R. China
  • 2: Department of ECE, University of Florida, Gainesville, FL 32611 USA
*Contact email: q.shen@ufl.edu, xmfang@swjtu.edu.cn, rshuang@ufl.edu, lipanleo@ufl.edu, fang@ece.ufl.edu

Abstract

Recent studies indicate that by improving the spatial reuse ratio the throughput of 802.11 wireless networks can be improved. In this paper, we study the impact of physical carrier sensing and channel rate on the throughput of 802.11 wireless networks with chain topology. Firstly, this paper proposes that by adopting different carrier sensing thresholds for the transmissions of RTS and CTS, the blocking problem caused by exposed terminals is alleviated significantly. In 802.11 wireless networks with this modification, the spatial reuse ratio under certain channel rates can be increased to 1/3, which is the highest value to our best knowledge. Secondly, in multirate networks, we demonstrate that 1/3 is still the best value of special reuse ratio in terms of maximizing the achievable data rate. Thirdly, this paper proposes a new way to address the intraflow contention by decreasing the carrier sensing threshold of the source node. This method has shorter response time than that of the traditional method with adjusting the backoff window size. Finally, extensive simulations are implemented in NS2. The results show that our scheme significantly improves the throughput of 802.11 wireless networks with chain topology.

Keywords
Medium Access Control (MAC) spatial reuse carrier sensing interference
Published
2010-05-16
Publisher
ICST
Modified
2010-05-16
http://dx.doi.org/10.4108/ICST.QSHINE2008.3840
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