Internet of Things (IoT) and Network Softwarization are fast becoming core technologies of information systems and network management for the next-generation Internet. The deployment and applications of IoT range from smart cities to urban computing and from ubiquitous healthcare to tactile Internet. For this reason, the physical infrastructure of heterogeneous network systems has become more complicated and thus requires efficient and dynamic solutions for management, configuration, and flow scheduling. Network softwarization in the form of Software Defined Networks and Network Function Virtualization has been extensively researched for IoT in the recent past. In this article, we present a systematic and comprehensive review of virtualization techniques explicitly designed for IoT networks. We have classified the literature into software-defined networks designed for IoT, function virtualization for IoT networks, and software-defined IoT networks. These categories are further divided into works that present architectural, security, and management solutions. Besides, the article highlights several short-term and long-term research challenges and open issues related to the adoption of software-defined Internet of Things.

中文翻译：

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使用SDN和NFV的物联网网络虚拟化技术综述

物联网（IoT）和网络软件化正在迅速成为下一代互联网信息系统和网络管理的核心技术。物联网的部署和应用范围从智慧城市到城市计算，从无处不在的医疗保健到触觉互联网。出于这个原因，异构网络系统的物理基础设施变得更加复杂，因此需要高效和动态的管理、配置和流调度解决方案。最近，以软件定义网络和网络功能虚拟化形式的网络软件化已被广泛研究用于物联网。在本文中，我们对专门为物联网网络设计的虚拟化技术进行了系统而全面的回顾。我们将文献分为为物联网设计的软件定义网络、物联网网络的功能虚拟化和软件定义的物联网网络。这些类别进一步分为呈现架构、安全和管理解决方案的作品。此外，本文重点介绍了与采用软件定义的物联网相关的几个短期和长期研究挑战和未解决的问题。