Enhanced Weighted Centroid Localization in RFID Technology: Patient Movement Tracking in Hospital

Abstract

Technologies like Global positioning system (GPS), sensors, Infrared (IR) Wi-Fi, cellular signals, etc. for tracking the movement of an object lack the location precision. The existing systems developed with these technologies were lacked of efficiency and accuracy to locate patient inside the hospital for utilizing the available resources (doctors, nurse, staff, and equipment). Therefore, we propose a system which minimizes the location error with less processing time for an indoor moving patient. Proposed system comprises Received Signal Strength Indicator (RSSI) with the existing Weighted Centroid Localization (WCL) methods improve the signal strength of a signal received from the tag and determining the exact position of moving tag by reducing the location error and improving the processing time. The efficiently tracks moving patient inside the hospital with decreased processing time from 86ms to 52ms and 116ms to 97ms also less location error from 0.08m to 0.03m and 0.18m to 0.15m based upon the number of tags deployed, i.e. 10 and 20 respectively. Thus, this solution provides hospital management accurate tracking of moving patient for efficient allocation of the available resources (doctors, nurse, examination room, etc.) based upon their position.