The Research of Location Service and Its Application Based on ZigBee Wireless Network
|Course||Applied Computer Technology|
|Keywords||Wireless Network ZigBee Signal strength Location-based services Motion Estimation AP failure compensation|
With the wireless communication technology is maturing , the 21st century is the age of the Internet into the wireless Internet era . Emerging wireless communication technologies , such as Wi - Fi , RFID, ZigBee, Bluetooth, ultrasound, etc. , and all aspects of \ZigBee its low power consumption, low cost , network capacity , fast response superiority of the rapid rise in the field of wireless communications . ZigBee wireless network - based positioning service to display a wide range of application prospects in the field of asset tracking and monitoring, community security , logistics management , staff emergency ambulance , etc. . Paper first reviews a variety of the mainstream positioning technology , including the time to arrive (TOA), angle-arrival (AOA), cellular location (Cell-ID), and based on the received signal strength (RSS) , highlights the positioning based on the received signal strength the principle of technology development status and trends . Based on the received signal strength positioning technology , the fingerprint location algorithm based on motion estimation algorithm from impaired signal strength positioning accuracy improved calibration methods and nearest neighbor solving formula , and then build the motion estimation Figure completed on the basis of motion estimation positioning method . In order to solve the signal strength positioning technology , wireless access points AP failure of thesis AP failure compensation of processing methods , from traditional centroid algorithm improvement work to start to achieve the AP failure of rapid detection and signal estimated and ZigBee wireless network be experimental verification environment . Order theory and application of a combination of design and development of ZigBee wireless network - based positioning system , the system uses a layered architecture to achieve intermediate messaging platform distributed extension last floors positioning , for example , the location-based services system .