A Cooperative Phase-Steering Technique with On-Off Power Control for Spectrum Sharing-Based Wireless Sensor Networks

Area of Science:

• Wireless communication networks
• Internet of Things (IoT)
• Signal processing

Background:

• Wireless Sensor Networks (WSNs) face spectrum and energy constraints.
• Growing number of IoT devices necessitates efficient WSNs.
• Spectrum sharing is crucial for scalable WSN deployments.

Purpose of the Study:

• To propose a novel cooperative phase-steering (CPS) technique for spectrum sharing in WSNs.
• To address limitations in spectrum and energy resources for WSNs.
• To enhance the performance of secondary networks in the presence of primary users.

Main Methods:

• Developed a cooperative phase-steering (CPS) technique with on-off power control.
• Implemented a system model with secondary source (SS), secondary relay (SR), secondary destination (SD), and primary destination (PD) nodes.
• Mathematically analyzed the outage probability of the proposed CPS scheme.

Main Results:

• The proposed CPS technique allows SR nodes to transmit to the SD node if packet decoding is successful and interference to PD nodes is below a threshold.
• SR nodes align transmit signal phases for constructive interference at the SD node.
• Analytical and simulation results demonstrate superior performance over conventional cooperative relaying schemes in terms of outage probability.

Conclusions:

• The CPS technique effectively manages spectrum sharing in WSNs.
• The proposed method significantly reduces outage probability compared to existing schemes.
• Analytical models provide a reliable lower bound for simulated outage probability.