I. Introduction
The Internet of Things (IoT) mainly aims at solving the interconnection characteristics among Thing to Thing (T2T), Human to Thing (H2T), and Human to Human (H2H) [1]. Generally speaking, the research hotspots direction of the IoT is divided into two aspects. The first aspect is to study the methods [2]–[5], frameworks [6], [7], platforms [8], and tools [9] of IoT to provide services for engineering applications better [10]. The other one is to study the engineering applications of IoT to improve the convenience and efficiency of work for various industries, including intelligent agriculture [11], intelligent manufacturing [12], intelligent transportation [13], military command and control (MC2) [14], and so on.