years, IoT technology and РIoT related industries have both been developing rapidly. However, there are still many issues need to be concerned. The Рmunication technology is designed for munications and could not satisfy the needs of machine type Рcommunication (MTC). Therefore, a spectrum spread-based munication technology, LoRa, comes into being, Рwhose characteristics of low-power and wide-area coverage are ideal for large-scale deployment of IoT. In this paper, the Рdevelopment course and status of LoRa are discussed firstly. Afterwards, modulation of LoRa and low power wide work Р(LPWAN) are introduced. At the end, detailed analysis of key technologies of LoRa and concrete instances of LoRa application Рare listed.РKeywords of Things; LPWAN; LoRa; Energy Saving; Broad CoverageР Р 72
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