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CLC number: TP393

On-line Access: 2019-12-10

Received: 2019-02-26

Revision Accepted: 2019-04-07

Crosschecked: 2019-10-14

Cited: 0

Clicked: 3122

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Bo Yuan

http://orcid.org/0000-0001-7916-6879

De-ji Chen

http://orcid.org/0000-0002-7838-9576

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Frontiers of Information Technology & Electronic Engineering  2019 Vol.20 No.11 P.1457-1464

http://doi.org/10.1631/FITEE.1900115


Conceptual model of real-time IoT systems


Author(s):  Bo Yuan, De-ji Chen, Dong-mei Xu, Ming Chen

Affiliation(s):  Department of Computer Science and Technology, Tongji University, Shanghai 201804, China; more

Corresponding email(s):   yuanbo@tongji.edu.cn, dejichen@tongji.edu.cn

Key Words:  Internet of Things (IoT), Real-time system, Conceptual model, View, Hard/Soft real-time


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Bo Yuan, De-ji Chen, Dong-mei Xu, Ming Chen. Conceptual model of real-time IoT systems[J]. Frontiers of Information Technology & Electronic Engineering, 2019, 20(11): 1457-1464.

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Abstract: 
We address a special kind of internet of Things (IoT) systems that are also real-time. We call them real-time IoT (RT- IoT) systems. An RT-IoT system needs to meet timing constraints of system delay, clock synchronization, deadline, and so on. The timing constraints turn to be more stringent as we get closer to the physical things. Based on the reference architecture of IoT (ISO/IEC 30141), the RT-IoT conceptual model is established. The idea of edge subsystem is introduced. The sensing & controlling domain is the basis of the edge subsystem, and the edge subsystem usually must meet the hard real-time constraints. The model includes four perspectives, the time view, computation view, communication view, and control view. Each view looks, from a different angle, at how the time parameters impact an RT-IoT system.

实时物联网概念模型

摘要:本文介绍一种特殊物联网系统,这种系统同时也是实时系统。我们称之为"实时物联网系统"。实时物联网系统需满足系统延迟、时钟同步、截止时间等时间约束。系统中越接近物理世界的部分,其时间限制越严格。基于物联网参考体系结构(ISO/IEC 30141)建立实时物联网概念模型,并引入"边缘子系统"概念。感知控制域是边缘子系统的基础。边缘子系统通常需满足硬实时约束。该模型包含4种视图,即时间视图、计算视图、通信视图和控制视图。每个视图从不同角度介绍时间参数如何影响实时物联网系统。

关键词:物联网;实时系统;概念模型;视角;硬/软实时

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