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Energy efficient dispatch strategy for the dual-functional mobile sink in wireless rechargeable sensor networks

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Abstract

Scavenging energy from radio-frequency (RF) signals has drawn significant attention in recent years. By introducing the technology of RF energy harvesting into wireless sensor networks, a new type of network named mobile data gathering based wireless rechargeable sensor network (MGWRSN) is considered in this paper. In the MGWRSN, a dual-functional mobile sink (MS) which has the abilities of data collecting and RF energy generating is employed. Data sensed by sensor nodes is gathered at several selected head nodes (HNs). Through using the RF energy supplied by the MS, the HNs deliver the gathered data to the MS arriving at the corresponding rendezvous points (RPs). In our works, the network energy consumption model of the MGWRSN is built, and the energy efficient dispatch strategy for the MS is studied, aiming at cutting down the total network energy consumption. For the simplest case, i.e., the one-HN MGWRSN, the optimal location of the RP is provided to minimize the total network energy consumption. After that, the researches are extended into the case of multi-HN MGWRSN and a heuristic dispatch strategy named HEEDS is proposed. Theoretical analysis and numerical results show that: (1) in the one-HN MGWRSN, the optimal location of the RP is close related to the data bulk to be transmitted, the unit mobility energy cost, the required bit error rate, the modulation scheme, and the departure position of the MS; (2) comparing with the existing algorithm WRP which directly dispatches the MS to the locations of HNs to collect data, the proposed strategy HEEDS is shown to be more energy efficient. Moreover, when a high energy transfer power is available at the MS, HEEDS renders shorter packet delay compared to WRP.

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Notes

  1. As mentioned in Sect. 2, the HNs are already given thus the information of HNs (e.g. the number and locations of HNs) is predetermined.

  2. In our works, the data routing is constructed based on shortest-path-tree (SPT).

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Acknowledgments

This work was supported by National Natural Science Foundation of China (Grant Nos. 61125306, 91016004, 60974120), Guangxi Natural Science Foundation under Grant No. 2014GXNSFAA118373, the open fund of Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education under Grant No. MCCSE2013B01, and A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

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Authors and Affiliations

  1. School of Automation, Southeast University, Nanjing, 210096, People’s Republic of China

    Xian Li, Qiuling Tang & Changyin Sun

  2. Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, Nanjing, 210096, People’s Republic of China

    Xian Li & Changyin Sun

  3. School of Computer, Electronics and Communication, Guangxi University, Nanning, 530004, People’s Republic of China

    Qiuling Tang

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  1. Xian Li
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Correspondence to Xian Li.

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Li, X., Tang, Q. & Sun, C. Energy efficient dispatch strategy for the dual-functional mobile sink in wireless rechargeable sensor networks. Wireless Netw 24, 671–681 (2018). https://doi.org/10.1007/s11276-016-1363-3

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