摘要
工业物联网(industrial internet of things,IIoT)场景利用大量通信及工业设备的交互协同实现各类工业自动化应用,其下的信道具有多频段、强反射、密集散射、移动遮挡等特点.准确建立可表征上述特点的路径损耗模型存在巨大挑战,它是构建该场景下可靠无线通信链路的关键.本文基于射线追踪结果,利用统计方法对IIoT场景下复杂信道的路径损耗模型进行建模与研究.首先,提出适用于多频段的路径损耗模型并构建与频率线性相关的隔断衰减因子;其次,引入距离、频率以及传播条件相关的金属机器路径损耗修正项,用于描述大型金属机器遮挡或密集金属散射体带来的额外路径损耗;最后,探索工业机器人运动对路径损耗的影响.本文所提出模型形式简洁,与射线追踪结果吻合度高,能够很好地描述IIoT场景下信道的多种特点对信道路径损耗的影响.本文研究结果可为IIoT场景下的链路预算和热点布设提供重要信息.
The Industrial Internet of Things(IIoT)scenario utilizes the interaction and collaboration of many communication and industrial devices,to realize the various industrial automation applications.The channels for such scenarios are featured with multi-frequency bands,strong reflections,dense scatterings and mobile obstructions.Thus,it is a huge challenge to propose an accurate path loss model,which is the key to establishing reliable wireless communication links,under such environments.In this paper,based on the results of ray tracing,firstly,a path loss model for multi-frequency bands is proposed,additionally,the partition attenuation factor with linear frequency dependency is constructed.Then,the distance,frequency,and propagation condition dependent metal machinery path loss correction term,which describes the additional path loss caused by large metal machinery or dense metal scatters,is introduced in the proposed model.Lastly,the impacts of the movement of the industrial robots on the path loss are investigated.The proposed model is simple and precise.It can well describe the influence of the features of IIoT channels on the path loss.The models and the results can provide vital information for the link budget and hotspot deployment for IIoT scenarios.
作者
余雨
何孙晶
刘婷婷
曾文浩
YU Yu;HE Sunjing;LIU Tingting;ZENG Wenhao(School of Information and Communication Engineering,Nanjing Institute of Technology,Nanjing 211167,China)
出处
《电波科学学报》
CSCD
北大核心
2023年第3期528-537,共10页
Chinese Journal of Radio Science
基金
江苏省自然科学基金青年基金(BK20201044)
国家自然科学基金(62171217)
中国高校产学研创新基金(2021FNA05002)
南京工程学院高层次引进人才科研启动基金(YKJ201970)。
关键词
工业物联网(IIoT)
路径损耗
信道模型
多频段
金属机器
Industrial Internet of Things(IIoT)
path loss
channel model
multi-frequency band
metal machinery
