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Practical Machine-Type Communication for Energy Internet of Things: An Introduction

As for any application of the Internet of Things (IoT), communication is key to implementing energy IoT (eIoT); and wireless communication is increasingly considered as an effective supplement to wired communication to provide an economically viable communication solution. Nevertheless, wireless technologies have disadvantages in spectrum shortage, reliability, and latency, posing challenges to implementing a practical, reliable, and integrated power communication network. This article introduces such a wireless machine-type communication (MTC) system -- a pioneering work currently under development as a national standard devoted to eIoT in the 230 MHz frequency band licensed to the power and energy industries by the State Radio Regulatory Commission of China. It may be seen as an example of a national-level wireless communication system for eIoT. In particular, this article discusses the unique characteristics of the 230 MHz spectrum allocated to eIoT, describes the eIoT requirements and challenges, and addresses their impacts on both system architecture and physical air interface. Finally, a service-centric MTC system is presented to demonstrate the key design concept and practical solutions to the specific eIoT requirements.