Problem investigation of min-max method for RSSI based indoor localization

This paper evaluates the performance of min-max and trilateration methods for RSSI-based indoor localization by a real test. Our experiments have been carried out in a laboratory room in the Department of Electrical Engineering, Prince of Songkla University, Thailand. An LPC2103F microcontroller interfacing with a CC2500 radio transceiver which was developed by our research team is used as a wireless node. The experimental result from a given scenario demonstrates that the min-max method significantly gives the better performance than the trilateration method; an average estimated position is closer to a real target position, and an average error distance is smaller. For the RSSI-based min-max method, we also summarize its limitations as found during the experiment; our finding can be used as information for researchers to further develop the min-max method.