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CREAM-MAC: Cognitive Radio-Enabled Multi-channel MAC for Wireless Networks

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Cognitive Radio Mobile Ad Hoc Networks

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Abstract

As the novel and effective approach to improve the utilization of the precious radio spectrum, cognitive radio technology is the key to realize the dynamic spectrum access (DSA) networks, where the secondary (unlicensed) users can opportunistically utilize the unused licensed spectrum in a way that confines the level of interference to the range the primary (licensed) users can tolerate. However, there are many new challenges associated with cognitive radio networks, such as the multi-channel hidden terminal problem and the fact that the time-varying channel availability differs for different secondary users, in the medium access control (MAC) layer. To overcome these challenges, we propose an efficient Cognitive Radio-EnAbled Multi-channel MAC (CREAM-MAC) protocol, which integrates the cooperative sequential spectrum sensing at physical layer and the packet scheduling at MAC layer, over the wireless cognitive radio networks. Under the proposed CREAM-MAC protocol, each secondary user is equipped with a cognitive radio-enabled transceiver and multiple channel sensors. Our cooperative sequential spectrum sensing scheme improves the accuracy of spectrum sensing and further protects the primary users. The proposed CREAM-MAC enables the secondary users to best utilize the unused frequency spectrum while avoiding the collisions among secondary users and between secondary users and primary users. We develop the Markov chain model and \(M/G^Y/1\) queueing model to rigorously study our proposed CREAM-MAC protocol for both the saturation networks and the non-saturation networks. We also conduct extensive simulations to validate our developed protocol and analytical models.

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Notes

  1. 1.

    In multi-channel systems, especially those with only one single transceiver, the multi-channel hidden terminal problem emerges. The reason is that a single transceiver may operate on only one channel, which makes it difficult to use virtual carrier sensing to handle the hidden terminals [32].

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Author information

Authors and Affiliations

  1. Networking and Information Systems Laboratory, Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX, 77843, USA

    Xi Zhang

  2. Networking and Information Systems Laboratory, Department of Electrical and Computer Engineering, Texas A&M, College Station, TX, USA

    Hang Su

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  1. Xi Zhang
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  2. Hang Su
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Correspondence to Xi Zhang .

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Editors and Affiliations

  1. Dept. Systems &, Computer Engineering, Carleton University, Colonel By Drive 1125, Ottawa, K1S 5B6, Ontario, Canada

    F. Richard Yu

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Zhang, X., Su, H. (2011). CREAM-MAC: Cognitive Radio-Enabled Multi-channel MAC for Wireless Networks. In: Yu, F. (eds) Cognitive Radio Mobile Ad Hoc Networks. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6172-3_5

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  • DOI: https://doi.org/10.1007/978-1-4419-6172-3_5

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  • Print ISBN: 978-1-4419-6171-6

  • Online ISBN: 978-1-4419-6172-3

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