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NOMA-Assisted Multiple Access Scheme for IoT Deployment: Relay Selection Model and Secrecy Performance Improvement.

Dinh-Thuan Do1, Minh-Sang Van Nguyen2, Thi-Anh Hoang3

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Summary

This study introduces Relay Selection Non-Orthogonal Multiple Access (RS-NOMA) for secure Internet-of-Things (IoT) systems. RS-NOMA enhances security performance over traditional methods, ensuring confidential data transmission.

Keywords:
IoTNOMArelay selectionsecure outage probabilitystrictly positive secure capacity

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Area of Science:

  • Wireless Communication Systems
  • Information Security
  • Internet-of-Things (IoT)

Background:

  • Non-Orthogonal Multiple Access (NOMA) is an emerging scheme for wireless communication.
  • Secure data transmission is critical in Internet-of-Things (IoT) systems.
  • Relay selection enhances system performance and reliability.

Purpose of the Study:

  • To propose and analyze a novel Relay Selection Non-Orthogonal Multiple Access (RS-NOMA) scheme for secure IoT systems.
  • To evaluate the secrecy performance of the proposed RS-NOMA system.
  • To compare the security performance of RS-NOMA against Orthogonal Multiple Access (OMA).

Main Methods:

  • Formulation of closed-form expressions for Secure Outage Probability (SOP) and Strictly Positive Secure Capacity (SPSC).
  • Analysis of system performance based on parameters like SNR, number of relays, channel gains, and threshold rates.
  • Numerical and analytical comparisons between NOMA and OMA schemes.

Main Results:

  • The proposed RS-NOMA scheme effectively enhances secure performance in IoT systems.
  • Closed-form expressions for SOP and SPSC provide a means to quantify secrecy.
  • Performance analysis demonstrates the impact of key system parameters on security.

Conclusions:

  • RS-NOMA offers superior security performance compared to OMA in the studied IoT context.
  • The proposed scheme provides a robust framework for secure communication in NOMA-enabled IoT networks.
  • Analytical and numerical results confirm the security advantages of RS-NOMA.