A Study on the Maximum Reliability of Multi-UAV Cooperation Relay Systems.

Area of Science:

• Wireless Communication
• Robotics
• Network Engineering

Background:

• Unmanned Aerial Vehicles (UAVs) are increasingly used for wireless services, especially to remote areas.
• Traditional direct links are often unreliable for remote users, necessitating relay solutions.
• Coded cooperative relaying with UAVs offers a potential solution for enhanced connectivity.

Purpose of the Study:

• To investigate and maximize the reliability of multi-hop relay Unmanned Aerial Vehicles (UAVs) for wireless services.
• To derive analytical expressions for power loss and bit error rate as key reliability metrics.
• To optimize UAV parameters for minimizing bit error rate and maximizing communication coverage.

Main Methods:

• Proposed a Line-of-Sight (LOS) probability model based on environmental parameters.
• Formulated a joint optimization problem to minimize bit error rate by adjusting UAV height, elevation, and power.
• Decomposed the nonconvex optimization problem into two subproblems and developed an iterative algorithm.

Main Results:

• Derived analytical expressions for total power loss and total bit error rate.
• Identified that optimal UAV height varies slightly for different reliability measures.
• Demonstrated that utilizing UAV mobility significantly enhances communication performance and reliability.

Conclusions:

• UAVs can serve as effective coded cooperative relays for remote users.
• Joint optimization of UAV parameters is crucial for maximizing communication reliability and coverage.
• UAV mobility presents a key advantage for improving wireless communication performance in challenging environments.