基于OpenWRT的物联网网关中间件设计与实现

发布时间：2019-06-12 02:45

【摘要】：随着物联网技术的发展,物联网应用已被越来越多地应用在社会生活的方方面面,业内人士预测物联网将会引领第三次科技革命浪潮。在不久的将来会有成千上万种传感器设备接入互联网,因此如何让这么多异构设备有效接入并进行科学管理,即被称为网关中间件技术成为了研究的热点。然而目前的网关中间件依然存在着一些问题,如过度依赖于相关平台,感知设备协议和格式过于复杂,无法进行有效的原型开发与验证,缺乏对设备的动态感知等等。因此,如何使中间件支持更大范围内的跨平台性、支持对底层设备的动态感知以及快速进行原型开发与验证成为了本课题研究的重点。为了解决上述问题,本文提出了以OpenWRT嵌入式操作系统为基础的网关中间件系统架构。首先是对相关基础技术进行了深入的研究,包括OpenWRT系统的定制化开发和与开源硬件的结合,AllJoyn技术的基本概念和运行原理以及网关中间件在网关系统中的地位与作用;接着本文详细探讨了网关中间件功能架构的设计过程,以模块化的分层思想简化设计逻辑,上层主要设计网关与物联网平台的可靠交互原理,下面两层结合AllJoyn技术设计网关对设备的动态感知能力;最后以一个开源硬件与微信结合的演示项目深入剖析了建立在MicroWRT开源硬件平台上的网关中间件实现细节,包括中间件的跨平台开发和设备动态发现机制的实现以及借助开源硬件优势实现原型系统的构建与验证。通过最后对演示系统核心功能的测试,证明了本研究的价值。
[Abstract]:With the development of Internet of things technology, Internet of things applications have been more and more used in all aspects of social life, industry insiders predict that the Internet of things will lead to the third wave of scientific and technological revolution. In the near future, there will be thousands of sensor devices connected to the Internet, so how to effectively access so many heterogeneous devices and carry out scientific management, that is, called gateway middleware technology, has become a hot research topic. However, there are still some problems in the gateway middleware, such as excessive dependence on the relevant platform, the perception of device protocols and formats are too complex, unable to carry out effective prototype development and verification, lack of dynamic perception of the device, and so on. Therefore, how to make middleware support a wider range of cross-platform, support the dynamic perception of the underlying equipment and rapid prototype development and verification has become the focus of this topic. In order to solve the above problems, a gateway middleware system architecture based on OpenWRT embedded operating system is proposed in this paper. First of all, the related basic technologies are deeply studied, including the customized development of OpenWRT system and the combination with open source hardware, the basic concept and operation principle of AllJoyn technology, and the position and function of gateway middleware in gateway system. Then this paper discusses in detail the design process of gateway middleware functional architecture, simplifies the design logic with the idea of modularization layering, the upper layer mainly designs the reliable interaction principle between gateway and Internet of things platform, the following two layers combine AllJoyn technology to design the dynamic perception ability of gateway to the device; Finally, with a demonstration project of the combination of open source hardware and WeChat, the implementation details of gateway middleware based on MicroWRT open source hardware platform are deeply analyzed, including the cross-platform development of middleware and the implementation of device dynamic discovery mechanism, as well as the construction and verification of prototype system with the help of open source hardware advantages. Finally, the value of this study is proved by the test of the core functions of the demonstration system.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.5;TP391.44

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