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Directional relays, essential for managing unidirectional fault currents, enhance the safety and efficiency of power systems. On power lines equipped with directional relays, faults downstream (to the right) of the current transformer typically cause the fault current to lag the bus voltage by approximately 90 degrees, known as the forward direction. In contrast, upstream (left-side) faults may result in the fault current leading the bus voltage by nearly 90 degrees, termed the reverse...
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Throughput Maximization for UAV-Enabled Relaying in Wireless Powered Communication Networks.

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  • 1Information Engineering School, Nanchang University, Nanchang 330031, China.

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Summary
This summary is machine-generated.

This study uses an unmanned aerial vehicle (UAV) to boost data transfer in wireless networks with blocked channels. The UAV provides power and data services, optimizing system throughput despite complex constraints.

Keywords:
relayingtrajectory optimizationunmanned aerial vehicle (UAV)wireless power transfer (WPT)wireless powered communication networks (WPCN)

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Area of Science:

  • Wireless Communication Networks
  • Mobile Relaying
  • Wireless Power Transfer

Background:

  • Investigates wireless powered communication networks (WPCN) with severely blocked channels.
  • Sources are low-power and lack direct energy supply.
  • Unmanned aerial vehicle (UAV) is utilized as a mobile relay.

Purpose of the Study:

  • To maximize system throughput in a WPCN using a UAV.
  • To address information causality and neutrality constraints.
  • To consider access delay for ground nodes in delay-tolerant and delay-sensitive cases.

Main Methods:

  • Formulated the system throughput maximization as a non-convex optimization problem.
  • Applied the successive convex approximation (SCA) technique.
  • Developed an iterative algorithm to achieve a suboptimal solution.

Main Results:

  • The proposed iterative algorithm effectively tackles the non-convex optimization problem.
  • Achieved a high-quality suboptimal solution for system throughput maximization.
  • Simulation results validate the effectiveness of the proposed UAV-assisted WPCN design.

Conclusions:

  • The UAV-based mobile relaying strategy enhances system throughput in challenging WPCN environments.
  • The SCA technique provides an efficient method for solving complex optimization problems in WPCN.
  • The proposed approach offers a practical solution for improving communication efficiency and reliability.