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A Cluster-Based MAC Protocol for Cognitive Radio Ad Hoc Networks

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Abstract

The cognitive radio (CR) technology is an efficient approach to share the spectrum. But how to access the idle channels effectively is a challenging problem. To solve this problem, we propose a MAC protocol for cluster-based CR ad hoc networks, with the aim of making cluster structure more robust to the primary users’ channel re-occupancy activities, so that the CR users can use the idle spectrum more efficiently. Under this framework, a cluster formation algorithm based on available channels, geographical position and experienced statistics is proposed to maximize the network throughput and maintain the cluster topology stability. The schemes for new CR user joining a cluster and cluster maintenance are also designed. An experience database is proposed to store the experienced statistics which are obtained from spectrum occupancy history. Such a database can be used to support the acts of nodes, such as neighbor discovery and cluster forming. Simulation results reveal that our proposed framework not only outperforms conventional CR MAC protocols in terms of throughput and packet delay, but also generates a smaller number of clusters and has more stable cluster structure with less reclustering time.

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Authors and Affiliations

  1. Xidian University, Xi’an, Shaanxi, People’s Republic of China

    Xiaoyan Li, Hailin Zhang & Xiaolong Zhang

  2. University of Alabama, Tuscaloosa, AL, USA

    Fei Hu

Authors
  1. Xiaoyan Li
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  2. Fei Hu
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  3. Hailin Zhang
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  4. Xiaolong Zhang
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Correspondence to Xiaoyan Li.

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Li, X., Hu, F., Zhang, H. et al. A Cluster-Based MAC Protocol for Cognitive Radio Ad Hoc Networks. Wireless Pers Commun 69, 937–955 (2013). https://doi.org/10.1007/s11277-012-0620-8

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  • DOI: https://doi.org/10.1007/s11277-012-0620-8

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