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Secure Multiuser Communications in Wireless Sensor Networks with TAS and Cooperative Jamming.

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Summary

This study enhances wireless sensor network (WSN) security using novel hybrid schemes. It optimizes parameters to minimize secrecy outage probability and maximize secrecy rate for secure data transmission.

Keywords:
cooperative jammingeffective secrecy throughputmultiuser schedulingphysical layer securitysecrecy outage probabilitytransmit antenna selectionwireless sensor networks

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Area of Science:

  • Wireless communication
  • Network security
  • Signal processing

Background:

  • Wireless Sensor Networks (WSNs) face security challenges.
  • Existing schemes can be complex and power-intensive.
  • Secure data transmission is crucial for WSNs.

Purpose of the Study:

  • To propose and analyze novel hybrid secure transmission schemes for WSNs.
  • To improve secrecy performance by reducing complexity and extending battery life.
  • To optimize system parameters for enhanced security and throughput.

Main Methods:

  • Employing Switch-and-Stay Combining (SSC) for sensor node scheduling.
  • Utilizing Transmit Antenna Selection (TAS) at the Base Station (BS).
  • Implementing Cooperative Jamming (CJ) with Zero-Forcing Beamforming (ZFB) or Null-Space Artificial Noise (NAN) schemes.

Main Results:

  • Derived exact closed-form expressions for secrecy outage probability and effective secrecy throughput.
  • Determined optimal switching thresholds and power allocation factors.
  • Validated theoretical analysis with numerical results.

Conclusions:

  • The proposed TAS-SSC-ZFB and TAS-SSC-NAN schemes offer satisfactory secrecy performance in WSNs.
  • Optimization of parameters significantly impacts secrecy outage probability and effective secrecy throughput.
  • The study provides a framework for designing secure and efficient WSNs.