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Decentralized Predictive MAC Protocol for Ad Hoc Cognitive Radio Networks

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Abstract

A new problem of spectrum scarcity has emerged due to the incredible technological advances in wireless communication. The spectrum scarcity issue is a bottleneck for the next generation of wireless communications. Therefore, efficient spectrum utilization has attracted considerable attention. This paper proposes a novel method of utilizing the white spaces in the licensed spectrum while ensuring the incumbent licensees’ rights. The protocol predicts the incumbents’ arrival using a historical prediction method and protects the incumbent users from the interference of opportunistic spectrum users. Distributed sensing is used to determine the network wide spectrum opportunity. The channel access delay in the proposed protocol is evaluated by simulation and mathematical analysis. The protocol has the advantages of a decentralized system, flexibility and low computing complexity. The simulations show that the protocol outperforms the existing opportunistic spectrum-sharing, media-access-control protocols in terms of the goodput and delay.

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Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2012R1A1B4000536).

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Authors and Affiliations

  1. Department of Information and Communication Engineering, Yeungnam University, Gyeongsan, Korea

    Gyanendra Prasad Joshi, Seung Yeob Nam & Sung Won Kim

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  1. Gyanendra Prasad Joshi
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  2. Seung Yeob Nam
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  3. Sung Won Kim
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Correspondence to Sung Won Kim.

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Joshi, G.P., Nam, S.Y. & Kim, S.W. Decentralized Predictive MAC Protocol for Ad Hoc Cognitive Radio Networks. Wireless Pers Commun 74, 803–821 (2014). https://doi.org/10.1007/s11277-013-1322-6

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