Secure NOMA-Based UAV-MEC Network Towards a Flying Eavesdropper

Non-orthogonal multiple access (NOMA) allows users to share link resource for higher spectrum efficiency. It can be applied unmanned aerial vehicle (UAV) and mobile edge computing (MEC) networks provide convenient offloading service ground (GUs) with large-scale access. However, due the line-of-sight (LoS) of UAV transmission, information easily eavesdropped in NOMA-based UAV-MEC networks. In this paper, we propose a secure communication scheme system towards flying eavesdropper. proposed scheme, average security computation capacity is maximized while guaranteeing minimum requirement each GU. Due uncertainty eavesdropper’s position, coupling multi-variables non-convexity problem, first study worst situation through mathematical derivation. Then, problem solved by utilizing successive convex approximation (SCA) block coordinate descent (BCD) methods respect channel coefficient, transmit power, central processing unit (CPU) frequency, local trajectory. Simulation results show that superior benchmarks terms performance.