System and method for classifying a type of calibration or maintenance event of a phone location unit in a volume based on sensor fusion

A system for classifying a type of calibration or maintenance event of a phone location unit (PLU) within a defined volume, based on at least one sensor, the system comprising:

• a PLU configured to determine a position of the at least one mobile communication device relative to a frame of reference of the defined volume, based on at least one of:
• angle of arrival, time of flight, or received intensity of radio frequency (RF) signals transmitted by the at least one mobile communication device and received by the phone location unit located within the defined volume and comprising a transceiver and antennas and further configured to wirelessly communicate with the at least one mobile communication device;
• a plurality of non-RF sensors configured to obtain at least one sensor measurement related to the at least one mobile communication device, from a sensor located on at least one of:
• the at least one mobile communication device, within the defined volume, or outside of the defined volume;
• and
• a computer processor configured to classify the at least one type of calibration or maintenance event of a phone location unit (PLU) within the defined volume into at least one of a plurality of predefined types of calibration or maintenance event, based on the position and the at least one sensor reading,
• wherein the phone location unit is further connected to a server, and wherein the type of calibration or maintenance event comprises at least one of:
• an automatic recalibration performed by said phone location unit, an automatic recalibration managed by said server, wherein said server transfers calibration data to the phone location unit, an assisted recalibration involving a user or a service person, the installation of a new SW in the phone location unit, the replacement of a faulty module, the reinstallation of one or more mislocated antennas, the reconnection of a detached antenna and, changes in the volume.