An Uplink Scheduling Strategy for QoS Guarantee of Multiple Information Flows Based on TD-LTE in Mini UAV Systems

In recent years,studies on communication system of mini UAVs based on 4G technologies are still in the initial stage,and limited literature focuses on scheduling strategy which is essential for the improvement of quality of service (QoS).An uplink scheduling strategy for QoS transmission guarantee of multiple information flows is developed in mini UAV systems,on basis of 4G TD-LTE technology with National Intellectual Property Rights.This proposed strategy provides a systematic mapping method and its corresponding scheduling algorithm for various kinds of information flows in mini UAV systems.By introducing weight factors of the QoS Class Identifier (QCI) and time-delay guarantee,the scheduling weight function of proportional fair (PF) algorithm is improved to achieve adaptive optimization of wireless resource allocation.This provides differentiated transmission services for information flows delivered between mini UAV terminals and control center.Moreover,fly safety and high quality information collection could be guaranteed for UAVs.