Short vs. Long-term Coordination of Drones: When Distributed Optimization Meets Deep Reinforcement Learning.

Swarms of smart drones, with the support of charging technology, can provide completing sensing capabilities in Smart Cities, such as traffic monitoring and disaster response. Existing approaches, including distributed optimization and deep reinforcement learning (DRL), aim to coordinate drones to achieve cost-effective, high-quality navigation, sensing, and recharging. However, they have distinct challenges: short-term optimization struggles to provide sustained benefits, while long-term DRL lacks scalability, resilience, and flexibility. To bridge this gap, this paper introduces a new progressive approach that encompasses the planning and selection based on distributed optimization, as well as DRL-based flying direction scheduling. Extensive experiment with datasets generated from realisitic urban mobility demonstrate the outstanding performance of the proposed solution in traffic monitoring compared to three baseline methods.