Indoor Location System Using ZigBee Technology

This paper describes a location system for persons and objects in an indoor environment, where wireless nodes can include sensors and provide unique identifiers. The system nodes, using ZigBee technology, can function as RFID tags, having each one a unique EPC identification number. Sensors can be associated with the wireless nodes Zigbee to create applications for home, health and traffic control. Location systems are analysed with emphasis on indoor location systems.The implemented location algorithm includes a propagation model based on the wall attenuation factor propagation model together with triangulation. A variety of tests were carried out in an indoor environment. Results demonstrate that the location system is viable, showing itself to be effective, flexible and easily adaptable to various locations.