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A hybrid algorithmic model for enhancing security in intelligent reflecting surface-assisted wireless communication.

Sivasankar S1, Markkandan S1

  • 1School of Electronics Engineering, Vellore Institute of Technology University, Chennai, Tamil Nadu, India.

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This study presents SGP-DARE, a new framework for wireless network security using intelligent reflecting surfaces (IRSs). It improves physical-layer security and energy efficiency, even with hardware limits and mobility.

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BeamformingChannel state information uncertaintyIRS-assisted communicationPhase shift controlPhysical layer securityQuantized phase shiftsSecure wireless networks

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Area of Science:

  • Wireless communication networks
  • Physical-layer security
  • Intelligent Reflecting Surfaces (IRSs)

Background:

  • Wireless networks face security challenges from channel uncertainties and mobility.
  • Intelligent Reflecting Surfaces (IRSs) offer a promising solution for enhancing wireless communication security.
  • Existing optimization methods may struggle with hardware limitations and dynamic environments.

Purpose of the Study:

  • To introduce a novel hybrid optimization framework, SGP-DARE, for enhanced physical-layer security in IRS-enabled wireless networks.
  • To address challenges posed by channel state information (CSI) uncertainties and user mobility.
  • To optimize base station beamforming and IRS phase shifts under hardware constraints.

Main Methods:

  • Developed Synergistic Gradient Projection (SGP) for low-complexity joint optimization.
  • Integrated Dynamic Adaptive Risk Expansion (DARE) for robustness against uncertainties.
  • Considered hardware limitations like phase quantization.

Main Results:

  • SGP-DARE effectively minimizes secrecy outage probability.
  • The framework demonstrates improved energy efficiency.
  • Simulations show significant performance gains over baseline methods.

Conclusions:

  • SGP-DARE offers a robust and efficient solution for physical-layer security in wireless networks.
  • The hybrid approach successfully balances security and efficiency under practical constraints.
  • This framework advances the application of IRSs in secure wireless communications.