ComPass system: an low power wireless sensor network system and its application to indoor positioning

Abstract

In this paper, we propose a wireless sensor network system called ComPass System, which uses low-power radio to provide services in everyday environments, such as indoor positioning services in public spaces. Although such environments present difficult hindrances such as dynamic changes of physical status, the ComPass System is designed to operate in such environments. The ComPass System 1) uses low-power radio and VHF radio band, 2) has low power consumption and functionality with cell batteries, and 3) has higher-level function such as bit-rate detection and signal correction on the ComPass Node----a node device designed for the ComPass System. We constructed an indoor autonomous positioning system in a commercial building, Yokohama Landmark Plaza, Minato-Mirai area, Japan, based on the ComPass System