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Maximizing effective secrecy throughput in SLIPT-based underwater wireless optical communication systems with
Applied Optics
|August 12, 2025
Summary
This study enhances underwater optical communication security and energy sustainability using relay-assisted systems with simultaneous information and power transfer. An alternating optimization algorithm effectively maximizes effective secrecy throughput by optimizing power splitting ratios.
Area of Science:
- Optical Communications
- Wireless Networks
- Information Security
Background:
- Underwater wireless optical communication (UWOC) systems face security and energy challenges.
- Relay-assisted systems offer potential solutions for extending range and improving performance.
- Simultaneous lightwave information and power transfer (SLIPT) presents a promising approach for energy sustainability.
Purpose of the Study:
- To investigate the physical layer security of a vertical relay-assisted UWOC system with SLIPT and artificial noise.
- To analyze the impact of various environmental factors on system security performance.
- To optimize the system's effective secrecy throughput (EST) through power management strategies.
Main Methods:
- Derivation of reliability outage probability, secrecy outage probability, and EST.
- Analysis of environmental factors: water types, turbulence, pointing errors, link interruption, and solar noise.
- Development of an EST maximization problem using power splitting ratios (energy harvesting/information decoding, artificial noise/confidential information).
- Application of an alternating optimization (AO) algorithm to solve the complex optimization problem.
Main Results:
- Environmental factors significantly affect the secrecy performance of UWOC systems.
- The proposed EST optimization problem effectively addresses security and energy concerns.
- The AO algorithm successfully maximizes the EST by determining optimal power splitting ratios.
- Monte Carlo simulations validate the derived expressions and the effectiveness of the AO approach.
Conclusions:
- The relay-assisted UWOC system with SLIPT and artificial noise offers enhanced physical layer security and energy sustainability.
- Optimizing power splitting ratios via the AO algorithm is crucial for maximizing effective secrecy throughput.
- This research provides valuable insights for designing robust and secure underwater communication networks.
