Ubiquitous Indoor Positioning and Tracking for Industrial Internet-of-Things: A Channel Response Perspective

The future of industrial location-aided applications is shaped by the ubiquity of Internet-of-Things (IoT) devices. As an increasing amount of commercial off-the-shelf radio devices support channel response collection, it is possible to achieve fine-grained position estimation at a relatively low cost. In this article, we focus on channel response-based positioning and tracking for industrial IoT applications. We first give an overview of the state of the art (SOTA) of channel response-enabled localization, which is further classified into two categories, \textit{i.e.}, device-based and contact-free schemes. Then we propose a taxonomy for these complementary approaches concerning the involved techniques. Finally, we discuss the practical issues of the SOTA methods for real-world applications and point out future research opportunities for channel response-based positioning and tracking.