| 摘要 |
PURPOSE: A Zigbee location recognizing method based on low power is provided to sum two RSSI values from two Zigbee routers at a present time and one RSSI value from a remaining Zigbee router at a just previous time, thereby recognizing the location of a Zigbee tag. CONSTITUTION: In a Zigbee tag location at a previous time, three RSSI(Received Signal Strength Indication) values are transmitted. Initialization is operated by performing the exact location recognition with the three RSSI values. When movement generates in a Zigbee tag, a Zigbee router C uses a previous value as a RSSI value. Remaining Zigbee router A,B perform the location recognition with a real-time RSSI value. Thereafter, the Zigbee router B uses a previous RSSI value. Remaining Zigbee router A,C recognize the location of the Zigbee tag with a present real-time RSSI value. Thereafter, the location of the Zigbee tag is recognized with the previous RSSI value of the Zigbee router A and the real-time RSSI value of remaining Zigbee router B,C. |
