工业互联网(Industrial Internet of Things,IIoT)是5G及后5G(beyond 5G,B5G)赋能工业制造的应用实例,也是“工业4.0”时代工业生产从制造走向智造的关键基础.IIoT场景的多样性与复杂性为该场景中通信系统的部署带来了挑战,准确刻画IIo...工业互联网(Industrial Internet of Things,IIoT)是5G及后5G(beyond 5G,B5G)赋能工业制造的应用实例,也是“工业4.0”时代工业生产从制造走向智造的关键基础.IIoT场景的多样性与复杂性为该场景中通信系统的部署带来了挑战,准确刻画IIoT场景中的无线信道特性是该场景中通信系统设计和优化的前提.本文首先对IIoT场景特点进行了分析,其次根据现有文献调研总结了IIoT场景的信道特性,接着介绍了第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)标准中IIoT场景的信道特性建模方法,最后对未来IIoT场景的信道研究进行了展望.展开更多
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...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.展开更多
Time sensitive networking(TSN)is a set of standards developed on the basis of audio video bridging(AVB).It has a promising future in the Industrial Internet of Things and vehicle-mounted multimedia,with such advantage...Time sensitive networking(TSN)is a set of standards developed on the basis of audio video bridging(AVB).It has a promising future in the Industrial Internet of Things and vehicle-mounted multimedia,with such advantages as high bandwidth,interoperability and low cost.In this paper,the TSN protocol stack is described and key technologies of network operation are summarized,including time synchronization,scheduling and flow shaping,flow management and fault tolerant mechanism.The TSN network model is then established.Its performance is illustrated to show how the frame priority works and also show the influence of IEEE802.1Qbv time-aware shaper and IEEE802.1Qbu frame preemption on network and time-sensitive data.Finally,we briefly discuss the challenges faced by TSN and the focus of future research.展开更多
文摘工业互联网(Industrial Internet of Things,IIoT)是5G及后5G(beyond 5G,B5G)赋能工业制造的应用实例,也是“工业4.0”时代工业生产从制造走向智造的关键基础.IIoT场景的多样性与复杂性为该场景中通信系统的部署带来了挑战,准确刻画IIoT场景中的无线信道特性是该场景中通信系统设计和优化的前提.本文首先对IIoT场景特点进行了分析,其次根据现有文献调研总结了IIoT场景的信道特性,接着介绍了第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)标准中IIoT场景的信道特性建模方法,最后对未来IIoT场景的信道研究进行了展望.
文摘工业物联网(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.
基金supported by ZTE Industry-Academia-Research Cooperation Funds
文摘Time sensitive networking(TSN)is a set of standards developed on the basis of audio video bridging(AVB).It has a promising future in the Industrial Internet of Things and vehicle-mounted multimedia,with such advantages as high bandwidth,interoperability and low cost.In this paper,the TSN protocol stack is described and key technologies of network operation are summarized,including time synchronization,scheduling and flow shaping,flow management and fault tolerant mechanism.The TSN network model is then established.Its performance is illustrated to show how the frame priority works and also show the influence of IEEE802.1Qbv time-aware shaper and IEEE802.1Qbu frame preemption on network and time-sensitive data.Finally,we briefly discuss the challenges faced by TSN and the focus of future research.
