动态对抗环境下空天地网络上行安全传输OA

The security and privacy protection of wireless communication networks constitutes a critical challenge in the evolution toward 6G space-air-ground network.To address diverse privacy threats in complex scenarios character-ized by three-dimensional coverage and multi-domain collaboration,an uplink secure transmission scheme for space-air-ground network under dynamic adversarial environments is proposed.The system model encompasses four core nodes:a satellite,a legitimate Relay Unmanned Aerial Vehicle(R-UAV),a malicious Eavesdropping UAV(E-UAV)and terrestrial users.The satellite is configured to receive relay signals solely from the R-UAV,simulating potential harsh channel conditions and the application requirements of cooperative communications.The E-UAV cruises within the communication airspace to opportunistically intercept the users'uplink information.For this scenario,a maximiza-tion problem of system secrecy transmission rate based on a fairness criterion is formulated.A cooperative optimiza-tion algorithm integrating Block Coordinate Descent(BCD),Semi-definite Relaxation(SDR),Successive Convex Ap-proximation(SCA)and a Dual Deep Q-network(DDQN)is also proposed.This algorithm collaboratively designs the UAV's flight trajectory,resource allocation strategy and beamforming parameters,to balance security and communica-tion performance.Simulation results demonstrate that the the proposed scheme offers superior flexibility and secure transmission advantages in dynamic adversarial environments,and elucidates the intrinsic correlations among the R-UAV's onboard resources,hardware configurations and system performance.