Journal of the Korea Society of Computer and Information (한국컴퓨터정보학회논문지)

Korean Society of Computer Information (한국컴퓨터정보학회)
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An Efficient Energy Charging Scheme for Wireless Sensor Networks Using a Mobile Sink Capable of Wireless Power Transmission

  • Received : 2019.04.11
  • Accepted : 2019.05.27
  • Published : 2019.05.31
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Abstract

In this paper, we propose the algorithms which determine 1) the efficient anchor-node visiting route of mobile sink in terms of energy supply and 2) the efficient energy amount to be charged to each anchor node, by using the information of each anchor node and the mobile sink. Wireless sensor networks (WSNs) using mobile sinks can be deployed in more challenging environments such as those that are isolated or dangerous, and can also achieve a balanced energy consumption among sensors which leads to prolong the network lifetime. Most mobile sinks visit only some anchor nodes which store the data collected by the nearby sensor nodes because of their limited energy. The problem of these schemes is that the lifetime of the anchor nodes can be shorten due to the increased energy consumption, which rapidly reduces the overall lifetime of WSN. This study utilizes a mobile sink capable of wireless power transmission to solve this problem, so a mobile sink can gather data from anchor nodes while charging energy to them. Through the performance verification, it is confirmed that the number of blackout nodes and the amount of collected data are greatly improved regardless of the size of the network.

Keywords

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Fig. 1. Previous overview

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Fig. 2. Candidate area for anchor nodes

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Fig. 3. Change of drone's path according to the presence of location information of anchor nodes

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Fig. 4. Sharing Information about location and energy of next anchor node

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Fig. 5. Change of drone’s path according to location and energy information sharing

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Fig. 6. Algorithm for determining the amount of energy charging to each anchor node

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Fig. 7. The number of blackout node according to the number of anchor nodes

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Fig. 8. The amount of gathered data according to the number of anchor nodes

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Fig. 9. Number of blackout nodes over time

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Fig. 10. Amount of gathered data over time

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Fig. 11. The number of blackout node according to the number of nodes

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Fig. 12. The amount of gathered data according to the number of nodes

Table 1. Comparison of rechargeable Scheme

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Table 2. Comparison of Mobile Sink Scheme

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Table 3. Experimental environment

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