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Energy-Efficient and Reliability-Driven Cooperative Communications in Cognitive Body Area Networks

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Abstract

We study the potential of cognition and cooperation in Body Area Networks (BANs). On one hand, most BAN-based applications involve end-to-end transmission across heterogenous networks. Cognitive communication has been known to be an effective technology for addressing network heterogeneity. On the other hand, a BAN is normally required to provide reliable communications and operate in a very low power level to conserve energy and reduce the electromagnetic radiation impact on human body. Cooperative communication has been known to enhance the transmission reliability and maintain low transmission power. However, the joint cognitive and cooperative mechanism has not been investigated yet in the literature. In this paper, we propose a network architecture for cognitive and cooperative communications in BANs. An intelligent mobile device is introduced as either a cognitive gateway to interconnect heterogenous networks; or a cooperative relay node to achieve transmission diversity. Two cooperative transmission schemes, Energy-conserved Cooperative Transmission and Reliability-driven Cooperative Transmission, are presented for different applications that have distinct energy consumption or reliability requirement. Optimization problems are formulated to optimally allocate power in the cooperative transmission. Results indicate that cooperative transmission schemes can significantly decrease Bit Error Rate (BER) and reduce energy consumption, compared to the non-cooperative schemes. The BER gain is over one order in the high SNR region, while the energy consumption can save up to 50% in the low BER region.

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Acknowledgements

The work in this paper is partly supported by programs of NSFC under Grant nos. 60903170, U0835003, U1035001; the Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP, no. 20090172120010); the Fundamental Research Funds for the Central Universities, SCUT (no. 2009ZM0250); and the Foundation for Distinguished Young Talents in Higher Education of Guangdong, China.

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Authors and Affiliations

  1. School of Automation, Guangdong University of Technology, Guangzhou, China

    Rong Yu

  2. School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China

    Rong Yu, Chen Gao, Chujia Huang & Ruchao Gao

  3. Simula Research Laboratory, Oslo, Norway

    Yan Zhang

  4. Department of Informatics, University of Oslo, Oslo, Norway

    Yan Zhang

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  1. Rong Yu
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  2. Yan Zhang
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  3. Chen Gao
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  4. Chujia Huang
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  5. Ruchao Gao
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Correspondence to Rong Yu.

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Yu, R., Zhang, Y., Gao, C. et al. Energy-Efficient and Reliability-Driven Cooperative Communications in Cognitive Body Area Networks. Mobile Netw Appl 16, 733–744 (2011). https://doi.org/10.1007/s11036-010-0273-3

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