Wireless networks have been in focus since the last few decades due to their indispensable role in the future generation networks like the Internet of Things (IoT). However, the associated challenges in wireless network implementation such as distance, line-of-sight, interference, weather, power issues, etc., affect the performance adversely. Software Defined Networking (SDN) is a future generation networking technology and has been proven to alleviate the performance challenges in the existing wireless IoT networks. It helps to evolve the wireless IoT domain in the form of Software Defined Wireless Network based IoT (SDWN-IoT). Traffic Engineering (TE) has been part of traditional network designs since long back, to improve the performance of the communication networks. However, its more optimized forms and their usefulness in SDWN-IoT networks have been under active investigation. This work explores the existing literature related to the major types of SDWN-IoT networks namely, Software Defined Wireless Sensor Network based IoT (SDWSN-IoT) and Software Defined Wireless Mesh Network based IoT (SDWMN-IoT). Additionally, the article also draws some useful inferences, and compares respective contributions and shortcomings. Finally, various research opportunities and challenges have been discussed with respect to the SDWSN-IoT and SDWMN-IoT networks.

由于无线网络在物联网(IoT)等下一代网络中发挥着不可或缺的作用，因此自过去几十年以来一直备受关注。然而，无线网络实施中的相关挑战，例如距离、视线、干扰、天气、电源问题等，都会对性能产生不利影响。软件定义网络(SDN) 是下一代网络技术，已被证明可以缓解现有无线物联网网络的性能挑战。它有助于以基于软件定义无线网络的物联网 (SDWN-IoT) 的形式发展无线物联网领域。流量工程 (TE) 长期以来一直是传统网络设计的一部分，旨在提高通信网络的性能。然而，其更优化的形式及其在 SDWN-IoT 网络中的实用性一直在积极研究中。这项工作探讨了与 SDWN-IoT 网络主要类型相关的现有文献，即软件定义的无线传感器网络基于物联网 (SDWSN-IoT) 和基于软件定义无线网状网络的物联网 (SDWMN-IoT)。此外，文章还得出了一些有用的推论，并比较了各自的贡献和不足。最后，讨论了有关 SDWSN-IoT 和 SDWMN-IoT 网络的各种研究机遇和挑战。