基于无人机分层网络的非对称链路研究  

Research on Asymmetric Link of UAV Aided Layered Network

作　　者：王宇[1] 王永生[1] 周奋[1] 

机构地区：[1]西北工业大学电子信息学院,西安710072

出　　处：《传感技术学报》2007年第5期1114-1118,共5页Chinese Journal of Sensors and Actuators

基　　金：国防973项目资助(51308)

摘　　要：战场信息感知和通信能力是影响战场信息网络性能的重要因素.依据无人机自身特点和未来战场通信的需求,提出了无人机平台辅助的分层式通信网络结构.网络采用无人机与地面ad hoc分簇网络实现有效信息交换.考虑到无人机与地面骨干节点之间链路的非对称性,提出一种基于非对称因子η的动态链路资源分配算法.仿真结果表明,动态分配算法实现的链路效率在高系统负载时比Slotted Aloha方式在性能上有较大改善,数据包的平均传输时延在系统负载率小于0.9时维持在较小水平,而当负载率大于0.95时时延增长速度显著加快.Information sensing and communication capability tend to be key influencing factors for battlefield network. This paper proposed a Unmanned Aerial Vehicle（UAV ） aided layered structure of network according to the demand of future battlefield communication and advantages of UAV platform. The UAV links the hierarchical ad hoc network on the ground to correspond the information exchange in a larger area within its beamform. Considering the asymmetric traffic between uplink and downlink, a dynamic link resource allocation algorithm is derived based on asymmetric factor η The experimental results reveal the dynamic algorithm gets a higher link efficiency than Slotted Aloha when running a high system load, and it is found through delay analysis that average delay of packet stays in low when system load is below 0. 9 and increases significantly when upper 0. 95.

关 键 词：无人机 分层网络TDA-OFDM非对称因子 

分 类 号：TN914.5[电子电信—通信与信息系统]