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A Downlink Coverage Scheme of Tethered UAV

With the establishment of the National Emergency Management Department, China has paid more and more attention to the capabilities of emergency communications after disasters. In order to solve the problem that the destruction of communication equipment after the disaster and the inability to guarantee normal communications, the research of the “Sky to Ground Integrated” network based on unmanned aerial vehicle (UAV) base stations has entered the planning and construction period. This paper studied the coverage scheme of tethered UAV. What's more, the network architecture and UAV platform of the tethered UAV are designed. In particular, the network architecture of the tethered UAV airborne system is designed, and the parameters and configurations of different scenarios are given in this paper. In addition, the paper also analyzes the link budget of different coverage schemes in 4G and 5G scenarios through simulation. At last, by adjusting parameters of transmit power of the UAV base station and the number of occupied PRBs, it can be seen that this paper proposed a series of engineering conclusions.