Patent ID: 7884712

Claim:
A method for determining a real-time location of an object within an indoor facility, the method comprising: generating a first reading set from a primary plurality of sensor readings transmitted from a tag at the first energy level, the tag attached to the object; sorting the first reading set by a plurality of primary physical regions; selecting a first primary physical region of the plurality of primary physical regions, the first physical region composed of a first plurality of sensor readings having a highest average signal strength from the first reading set; sorting the first plurality of sensor readings into a second plurality of sensor readings, the second plurality of sensor readings corresponding to a zone within the first primary physical region; selecting a selected primary zone having the highest average reading from the second plurality of sensor readings; calculating the first preliminary location of the object from a plurality of the highest sensor readings from the second plurality of sensor readings corresponding to the selected primary zone; calculating a second preliminary location of the object from a second plurality of sensor readings generated at a second power level, the second power level less than the first power level; and analyzing the first preliminary location of the object and the second preliminary location of the object to determine a real-time location of the object within the indoor facility.