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Allocation of optimal energy in an energy-harvesting cooperative multi-band cognitive radio network

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Abstract

This paper studies the achievable total throughput of an energy harvesting cooperative cognitive radio (CR) network. A CR transmitter cooperates with a primary user (PU) transmission if PU is found to be present in the given channel while it transmits its own data in the absence of PU. The CR transmitter is an energy harvesting node which harvests simultaneously from non-RF signal as well as RF signal of PU. The CR transmitter uses the harvested energy on shared basis for cooperation and transmission. The same study is also extended for cooperation of multiple CRs in multiple PU band scenario. In cooperation in muti-band scenario, all CRs sense all PU channels and sensing informations are fused at fusion centre to know about the status of PU. Performance is investigated in terms of total network throughput for several parameters such as sensing time, energy splitting parameter, and energy allocation ratio etc. Novel analytical expressions for total useful throughput and optimal energy allocation ratio parameter under the considered network scenario are developed. Useful throughput and optimal energy allocation ratio parameter are also estimated for a target secondary network (CR network) throughput under a quality of service constraint of PU such as collision probability. It is observed that the value of optimal energy allocation parameter gets reduced if the number of CRs in cooperation increases or the number of PU channels increases.

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Authors and Affiliations

  1. SENSE, VIT University, Vellore, TN, India

    Abhijt Bhowmick

  2. Department of ECE, BCET, Durgapur, WB, India

    Gopal Chandra Das

  3. Department of ECE, NIT Durgapur, Durgapur, India

    Sanjay Dhar Roy & Sumit Kundu

  4. Department of IT, IIEST, Shibpur, WB, India

    Santi P. Maity

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  1. Abhijt Bhowmick
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Correspondence to Abhijt Bhowmick.

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Bhowmick, A., Das, G.C., Roy, S.D. et al. Allocation of optimal energy in an energy-harvesting cooperative multi-band cognitive radio network. Wireless Netw 26, 1033–1043 (2020). https://doi.org/10.1007/s11276-018-1849-2

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  • DOI: https://doi.org/10.1007/s11276-018-1849-2

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