Research and development of indoor positioning

Indoor positioning systems have been sufficiently researched to provide location information of persons and devices. This paper is focused on the current research and further development of indoor positioning. The standard evolution and industry development are summarized. There are various positioning systems according to the scenarios, cost and accuracy. However, there is a basic positioning system framework including information extraction, measurement and calculation. In particular, the detailed positioning technologies mainly including cellular positioning and Local Area Network (LAN) positioning are listed and compared to provide a reference for practical applications. Finally, we summarize the challenges of indoor positioning and give a 3-phase evolution route.