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Digital Twin-Assisted Satellite-Ground Cooperative Edge Network Resource Optimization Method
Proceedings of 2025 2nd International Conference on Machine Learning and Intelligent Computing, PMLR 278:8-22, 2025.
Abstract
To address the challenge of efficiently processing data on resource-constrained IoT devices, this paper proposes a digital twin architecture for satellite-terrestrial collaborative edge networks and introduces Coordinated Constrained DDPG (CC_DDPG), a deep reinforcement learning (DRL)-based task offloading and resource allocation algorithm tailored for model training tasks. First, digital twin models for UAVs and satellites are constructed to enable real-time network state monitoring and decision support. Second, the joint optimization of task offloading, communication, and computing resources is formulated as a Markov Decision Process (MDP). By enhancing the actor network in the conventional DDPG method, the proposed algorithm dynamically balances training latency and energy consumption. Simulation results demonstrate that CC_DDPG significantly outperforms benchmark heuristic algorithms in convergence stability and multi-objective optimization performance.