一种基于TD-LTE面向多种信息流QoS保证的小型无人机上行链路调度策略

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

近年来,基于第四代移动通信技术(4G)的无人机通信系统研究尚处于起步阶段,鲜有专门研究传输链路调度策略,提高通信服务质量(QoS)的文献。采用具有民族自主知识产权的4G分时长期演进(TD-LTE)技术,提出一种面向多种信息流QoS保证的小型无人机上行链路调度策略。该策略建议了一种无人机信息流分类映射方法及相应的调度算法。通过改进比例公平(PF)算法,将QoS分级标识符(QCI)权重因子及时延保证因子引入调度权重函数,实现无线资源的自适应优化配置,可为无人机在飞行过程中回传给控制管理中心的各类信息提供差异化传输服务,为无人机的可靠飞行及获取高质量的采集信息提供有效的实时链路保证。

In recent years,studies on communication system of mini UAVs based on 4Gtechnologies 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.