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Maximum Power Transfer

Maximum Power Transfer

Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...

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Exploiting Opportunistic Scheduling Schemes and WPT-Based Multi-Hop Transmissions to Improve Physical Layer Security

Kyusung Shim¹, Toan-Van Nguyen¹, Beongku An²

¹Department of Electronics and Computer Engineering, Hongik University, Sejong City 30016, Korea.

Sensors (Basel, Switzerland)

|December 15, 2019

Summary

This study enhances wireless power transfer (WPT) security in wireless sensor networks (WSNs) using novel scheduling. The optimal node selection (ONS) scheme significantly improves secure data transmission against eavesdroppers.

Keywords:

artificial noise multi-hop transmission opportunistic scheduling physical layer security secrecy outage probability wireless sensor networks

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Area of Science:

Wireless Communication Systems
Network Security
Energy Harvesting Technologies

Background:

Wireless sensor networks (WSNs) face security challenges in multi-hop data transmission.
Energy constraints in WSNs limit the implementation of robust security measures.
Wireless power transfer (WPT) offers a potential solution for energy-constrained networks.

Purpose of the Study:

To investigate the secrecy performance of WPT-based multi-hop transmissions in WSNs.
To propose and evaluate novel secure scheduling schemes for enhanced data security.
To analyze the impact of system parameters on the overall secrecy performance.

Main Methods:

Development of two secure scheduling schemes: Minimum Node Selection (MNS) and Optimal Node Selection (ONS).
Mathematical analysis to derive exact closed-form and asymptotic expressions for Secrecy Outage Probability (SOP).
Validation of analytical results through extensive Monte-Carlo simulations.

Main Results:

The Optimal Node Selection (ONS) scheme demonstrates superior performance over the Minimum Node Selection (MNS) scheme.
Analytical models accurately predict the secrecy performance of the proposed schemes.
System parameters like the number of power beacons (PBs), hops, time switching ratio, and secure data rate significantly influence secrecy.

Conclusions:

The proposed ONS scheme is an effective protocol for secure multi-hop transmission in WSNs utilizing WPT.
WPT-based friendly jamming by PBs enhances network security against eavesdropping.
The study provides valuable insights for designing secure and energy-efficient WSNs.