Wireless position location and tracking system
Techniques for accurate position location and tracking suitable for a wide range of facilities in variable environments are disclosed. In one aspect, a system for position location comprises a plurality of sensors (e.g. a network monitor, an environment sensor) for generating measurements of a plurality of sources, a plurality of objects or tags, each object generating measurements of the plurality of sources, and a processor for receiving the measurements and generating a position location for one or more objects in accordance with the received measurements. In another aspect, a position engine comprises a mapped space of a physical environment, and a processor for updating the mapped space in response to received measurements. The position engine may receive second measurements from an object within the physical environment, and generate a position location estimate for the object from the received second measurements and the mapped space.
1. A system for real-time position location of an object within an indoor, multi-floor facility, the system comprising:
a plurality of beacon emitters positioned within the indoor multi-floor facility, each beacon emitter generating a radiofrequency signal;
a plurality of network monitors, each network monitor attached to a wall outlet of the indoor, multi-floor facility and generating a first plurality of measurements, the first plurality of measurements comprising data, the data comprising signal strength from each of the plurality of beacon emitters received by the network monitor;
a plurality of mobile objects located within the indoor, multi-floor facility, each mobile object having a respective tag associated therewith, each tag generating a second plurality of measurements, the second plurality of measurements comprising data, the data comprising signal strength from each of the plurality of beacon emitters received by the tag;
a plurality of access points located within the indoor, multi-floor facility, at least one of the plurality of access points wirelessly receiving data of the first plurality of measurements from each of the plurality of network monitors utilizing a 802.11 communication link,
wherein at least one of the plurality of network monitors wirelessly receives data of the second plurality of measurements from the tag of each mobile object using a 802.15.4 communication link and wirelessly transmits the data of the second plurality of measurements to at least one of the plurality of access points utilizing the 802.11 communication link; and
a location positioning engine for receiving through the plurality of access points (1) data of at least one of the first plurality of measurements from each of the plurality of network monitors and (2) data of at least one of the second plurality of measurements from the tag of at least one of the mobile objects of the plurality of mobile objects, the location positioning engine generating a real-time position of each of the plurality of mobile objects within the indoor, multi-floor facility.
2. The system according to claim 1 wherein the location positioning engine utilizes a radial basis function and the data of the first plurality of measurements to generate and continuously update a real-time mapped space of a radiofrequency environment of the multi-floor indoor facility.
3. The system according to claim 2 wherein the location positioning engine utilizes the data of the second plurality of measurements and the real-time mapped space of the radiofrequency environment of the multi-floor indoor facility to generate a real-time position location in an X-Y-Z coordinate for at least one of the plurality of mobile objects.