An energy-efficient controller for wirelessly-powered communication networks

Movahednasab, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1109/TCOMM.2020.2994228
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2020
  4. Abstract:
  5. In a wirelessly-powered communication network (WPCN), an energy access point (E-AP) supplies the energy needs of the network nodes through radio frequency wave transmission, and the nodes store their received energy in their batteries for possible data transmission. In this paper, we propose an online control policy for energy transfer from the E-AP to the wireless nodes and for data transfer among the nodes. With our proposed control policy, all data queues of the nodes are stable, while the average energy consumption of the network is shown to be within a bounded gap of the minimum energy required for stabilizing the network. Our proposed policy is designed using a quadratic Lyapunov function to capture the limitations on the energy consumption of the nodes imposed by their battery levels. We show that under the proposed control policy, the backlog level in the data queues and the stored energy level in the batteries fluctuate in small intervals around some constant levels. Consequently, by imposing a negligible average data drop rate, the data buffer size and the battery capacity of the nodes can be significantly reduced. © 2020 IEEE
  6. Keywords:
  7. Batteries ; Cooperative communication ; Finite block-length analysis ; Green communication ; Internet of things ; Lyapunov stability ; Networks ; Queuing analysis ; Routing ; Scheduling ; Stability ; Stochastic optimization ; Wireless energy transfer (WET) ; Wireless powered communication networks (WPCNs) ; Data transfer ; Electric batteries ; Energy efficiency ; Energy transfer ; Energy utilization ; Lyapunov functions ; Radio transmission ; Wave transmission ; Average energy ; Battery capacity ; Constant level ; Control policy ; Energy efficient ; On-line controls ; Quadratic Lyapunov function ; Radio frequency waves ; Energy policy
  8. Source: IEEE Transactions on Communications ; Volume 68, Issue 8 , August , 2020 , Pages 4986-5002
  9. URL: https://ieeexplore.ieee.org/document/9091929