电信科学 ›› 2012, Vol. 28 ›› Issue (1): 96-101.doi: 10.3969/j.issn.1000-0801.2012.01.018

• 研究与开发 • 上一篇    下一篇

物联网硬实时控制系统中可调度性分析方法的研究

高志刚1,陆慧娟2   

  1. 1 杭州电子科技大学计算机学院 杭州310018
    2 中国计量学院信息工程学院 杭州310018
  • 发布日期:2017-02-07

Research on Schedulability Analysis for Hard Real-Time Systems in Internet of Things

Zhigang Gao1,Huijuan Lu2   

  1. 1 College of Computer Science,Hangzhou Dianzi University,Hangzhou 310018,China
    2 College of Information Engineering,China Jiliang University,Hangzhou 310018,China
  • Published:2017-02-07

摘要:

建立了具有反馈型和非反馈型任务的物联网硬实时控制系统——混合控制任务系统(hybrid controlling task system,HCTS)的任务模型,以全面准确地描述系统中不同任务的结构、交互模式和运行特征,并提出了一种新的响应时间分析方法,用于验证系统是否满足实时性要求。实验结果表明,HCTS 中的任务具有较小的平均最差情况下的响应时间,但是在反馈次数较多的情况下对任务的实时性具有不利影响,从而为HCTS 的优化提供了支持。

关键词: 物联网, 硬实时系统, 反馈控制, 响应时间

Abstract:

This paper builds a new task model for hard real-time Internet of Things systems with feedback tasks and non-feedback tasks and presents a new response time analysis method.This task model describes the characteristics of tasks in detail,such as their structures,interaction modes and running manner.The new schedulability analysis method can verify whether real-time requirements are met.Experimental results show the tasks in HCTS have lower average worst-case response time.However,it has some negative influence on the schedulability of tasks in the case of more feedback loops,which provides support for the optimization of HCTS.

Key words: Internet of Things, hard real-time system, feedback control, response time

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