We study a scenario where multiple drone-mounted base stations cruise freely over a macro hotspot to serve mobile users on the ground. The drone base stations move constantly and update their moving directions following our proposed mobility control algorithm. The constant movement of drones reduces the distance between the base stations and users. which in turn improves the probabili... https://www.jmannino.com/top-offer-Simply-Southern-World-Full-Valentine-T-Shirt-top-buy/