mca 12(2): e1

Research Article

A Sensing Error Aware MAC Protocol for Cognitive Radio Networks

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  • @ARTICLE{10.4108/mca.2012.07-09.e1,
        author={Donglin Hu and Shiwen Mao},
        title={A Sensing Error Aware MAC Protocol for Cognitive Radio Networks},
        journal={EAI Endorsed Transactions on Mobile Communications and Applications},
        volume={1},
        number={2},
        publisher={ICST},
        journal_a={MCA},
        year={2012},
        month={8},
        keywords={Cognitive radio, cross-layer design and optimization, dynamic spectrum access, medium access control, software defined radio, spectrum sensing.},
        doi={10.4108/mca.2012.07-09.e1}
    }
    
  • Donglin Hu
    Shiwen Mao
    Year: 2012
    A Sensing Error Aware MAC Protocol for Cognitive Radio Networks
    MCA
    ICST
    DOI: 10.4108/mca.2012.07-09.e1
Donglin Hu1, Shiwen Mao1
  • 1: Department of Electrical and Computer Engineering, Auburn University, Auburn, AL 36849-5201, USA

Abstract

Cognitive radios (CR) are intelligent radio devices that can sense the radio environment and adapt to changes in the radio environment. Spectrum sensing and spectrum access are the two key CR functions. In this paper, we present a spectrum sensing error aware MAC protocol for a CR network collocated with multiple primary networks. We explicitly consider both types of sensing errors in the CR MAC design, since such errors are inevitable for practical spectrum sensors and more importantly, such errors could have significant impact on the performance of the CR MAC protocol. Two spectrum sensing polices are presented, with which secondary users collaboratively sense the licensed channels. The sensing policies are then incorporated into p-Persistent CSMA to coordinate opportunistic spectrum access for CR network users.We present an analysis of the interference and throughput performance of the proposed CR MAC, and find the analysis highly accurate in our simulation studies. The proposed sensing error aware CR MAC protocol outperforms two existing approaches with considerable margins in our simulations, which justify the importance of considering spectrum sensing errors in CR MAC design.