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In recent years, there is an increasing demand for unmanned aerial vehicles(UAVs) to complete multiple applications. However, as unmanned equipments, UAVslead to some security risks to general civil aviations. In order to strengthenthe flight management of UAVs and guarantee the safety, UAVs can be equippedwith automatic dependent surveillance-broadcast (ADS-B) devices. In addition,as an automatic system, ADS-B can periodically broadcast flight information tothe nearby aircrafts or the ground stations, and the technology is already usedin civil aviation systems. However, due to the limited frequency of ADS-Btechnique, UAVs equipped with ADS-B devices result in the loss of packets toboth UAVs and civil aviation. Further, the operation of civil aviation areseriously interfered. Hence, this paper firstly examines the packets loss ofcivil planes at different distance, then analyzes the impact of UAVs equippedwith ADS-B on the packets updating of civil planes. The result indicates thatthe 1090MHz band blocking is affected by the density of UAVs. Besides, thefrequency capacity is affected by the requirement of updating interval of civilplanes. The position updating probability within 3s is 92.3% if there are 200planes within 50km and 20 UAVs within 5km. The position updating probabilitywithin 3s is 86.9% if there are 200 planes within 50km and 40 UAVs within 5km.

Impact of UAVs Equipped with ADS-B on the Civil Aviation Monitoring System