Buffer area-based auxiliary unmanned aerial vehicle relay covert communication method

By constructing a system model and decomposing it into the optimization problem of UAV transmission power, flight trajectory and buffer zone decision, the problem of balancing concealment and throughput in existing covert communication technology is solved, the concealment and throughput are maximized under the coordination of multiple UAVs, and the robustness and efficiency of communication are enhanced.

CN120811459APending Publication Date: 2025-10-17CHONGQING UNIV OF POSTS & TELECOMM
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Patent Information

Application Number
CN202511018037.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-23
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

Existing covert communication technologies find it difficult to balance concealment and system throughput in real time when facing mobile eavesdroppers with uncertain locations, especially in the context of multi-UAV collaborative optimization, where it is difficult to obtain the optimal solution.

Method used

By constructing a system model and decomposing it into the optimization problem of UAV transmission power, flight trajectory and buffer zone decision, analytical optimization and collaborative strategies are adopted to jointly optimize the transmission power, flight trajectory and buffer zone reception decision of UAV relay to achieve concealment protection and maximize system throughput.

Benefits of technology

While satisfying the stealth constraint, the end-to-end average system throughput from Alice to Bob is effectively maximized, the communication stealth performance is enhanced, the network dynamics is adapted, and the robustness is provided in complex eavesdropping scenarios.

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Abstract

The invention discloses a hidden communication method for assisting unmanned aerial vehicle relay based on a buffer area, and the method achieves the maximization of the average throughput of a system through the introduction of the buffer area, and meets the hidden detection constraint of an eavesdropper. Aiming at the characteristics that the position of an eavesdropper is uncertain and the eavesdropper has mobility, the optimal detection threshold of the eavesdropper is deduced, and then a closed expression for detecting error probability is obtained. In the aspect of system optimization, the concealment constraint is converted into a new form, an optimal transmitting power distribution scheme of an unmanned aerial vehicle relay and a friendly unmanned aerial vehicle jammer is designed, and the balance between the communication concealment and throughput is ensured. Meanwhile, the existence of the optimal unmanned aerial vehicle track is proved by analyzing the upper and lower bounds of the throughput of the system, and the optimal receiving and transmitting strategy of the unmanned aerial vehicle relay is provided by combining the size constraint of the buffer area. Numerical simulation and theoretical analysis results show that the method has remarkable effects in improving the average throughput of the system and guaranteeing the communication concealment.
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