Abstract: Based on the analysis of development history and application environment changes of Internet, this paper provided a comprehensive discussion on the incentive, connotation, organization，and some key issues of the Internet of Things (IoT). On the basis of the analysis of the typical definition of IoT, the author believed that "the full range of information interoperability ITU to IoT as an Internet platform in the application areas of human, machine, and intelligent physical objects (SPO) and the next generation Internet applications generalization of Pervasive Computing (Ubiquitous Computing) concept " is a more reasonable broad definition of the IoT. Based on this definition, the author analyzed the basic organization of IoT, which consisted of interconnected multiple Customer Premises Network (CPN) via backbone Subnetworks, and examined two types of components of SPOCPN and their supporting techniques. It was also pointed out that introduction of SPO has little impact on Internet technology, except on access part of CPN of application systems. The author disagreed on the definition of IoT in narrow sense given by the European communities, which restricted IoT to Internet of interconnecting physical objects, and pointed out their models and architectures of IoT are essentially those of network application systems.

Key words: Smart Physical Object (SPO), The Internet of Things (IoT), Internet of Physical Objects (IPO), Internet of Everything (IoE)

摘要： 从Internet发展历史及应用环境变化的角度讨论IoT(Internet of Things)提出背景、内涵、组成结构和体系结构等关键问题。在分析对IoT的典型定义的基础上，笔者认为“ITU把IoT作为Internet平台在应用领域实现人、机、和智能化物理对象(SPO)信息全方位互通和实践普适计算理念的下一代Internet及其应用系统的概括”是对IoT更为合理的广义定义。以该定义为基础，全面地分析了“由多个用户域网(CPN)通过骨干通信子网互联”的基本组成结构，讨论了两类SPOCPN的基本组成结构及其支撑技术；指出SPO的引入主要影响CPN资源网络中的接入部分，属于应用系统的范畴，对Internet基本技术影响甚微。笔者不赞同以欧盟为代表的把IoT定义为联物专用网的狭义定义，指出其IoT模型和体系结构研究混淆了网络平台与应用系统，实质上是网络应用系统模型和体系结构。

关键词: 智能化物理对象, IoT, 物联网, 全联网