Mobile Positioning System Based on the Wireless Sensor Network in Buildings

Using 802.11 wireless network protocols as the communication medium, combining with radio frequency-communication and ultrasonic ranging, implement a mobile terminal system in an intellectualized building. It can provide its holder such functions: 1) accurate positioning 2) intelligent navigation 3) video monitoring 4) wireless communication. The innovative point for this paper is to apply this system into the indoor environment for the purpose of emergent event or rescuing.