System and method to collect and modify calibration data
View Patent ↗A system and method modifies calibration data used to geo-locate a mobile station. Calibration data measured via a calibration data collection device may contain errors due to the physical limitations of the collection device and/or the collection process. Any data collection device may produce some degree of signal degradation or drop-out. Dead reckoning provides a remedy for signal drop-out, however, it often produces data results that may be unsatisfactory to perform an accurate location estimate. To ensure the integrity of the collected calibration data, a data modification and/or data replacement algorithm may be implemented to enhance the accuracy of the collected data. In addition, current collection procedures used to generate a calibration database may be laborious, time-consuming and expensive. Simplifying the test and measurement equipment needed, and the procedures for obtaining calibration data may save time and expenses.
1. A method for generating a calibration database, comprising;
receiving at a wireless device an attribute of a signal transmitted by a wireless transmitter to a mobile station in a region;
wirelessly transmitting from said wireless device said attribute to a controller unit;
obtaining location data of a plurality of geographic locations situated within said region, wherein said location data is determined using said wireless device, and wherein said region contains plural streets and intersections of said plural streets;
providing a location information database wherein said location database includes latitude and longitude information for each of a plurality of points within said region;
determining a status of said wireless device;
determining from said status a most likely one of said plural streets upon which said wireless device is located;
determining said most likely street as a first one of said plural geographic locations;
determining a first point of said plural points that is in proximity to said first geographic location; and
entering said first point in said calibration database and associating the location data for the first one of said plural geographic locations determined by said wireless device with the first point.
2. The method of claim 1 wherein said attribute is selected from the group consisting of: signal strength, Cell global identity, broadcast control channel, base station identity code.
3. The method of claim 1 further comprising determining at said controller unit if said location data is statistically sufficient and if so entering said location data into said location information database.
4. The method of claim 1 further comprising determining at said controller unit if said location data is statistically sufficient and if so entering said location data into a non-uniform grid generator.
5. The method of claim 1 further comprising sending future positioning information from said controller unit to said wireless device.
6. The method of claim 5 wherein said future position information includes at least one of a geographic position and a speed.
7. The method of claim 5 further comprising determining said future positioning information at least in part on information from said location information database.
8. The method of claim 5 further comprising determining said future positioning information at least in part on information from a non-uniform grid generator.
9. The method of claim 1 further comprising receiving at said wireless device an attribute of a signal transmitted by the wireless transmitter in communication with a mobile station in a second region.
10. The method of claim 1 wherein said location database is a street database.
11. The method of claim 1 wherein said status includes attributes selected from the group consisting of: direction of travel; speed of travel, and change in direction of travel.
12. A system for generating a calibration database, comprising:
a wireless device for determining location data at a plurality of geographic locations situated within a region, wherein said region contains plural streets and intersections of said plural streets, said wireless device receiving an attribute of a signal transmitted by a wireless transmitter to a mobile station in said region;
a wireless device transmitter for transmitting from said wireless device said attribute to a controller unit;
a location information database wherein said location database includes latitude and longitude information for each of a plurality of points within said region;
circuitry for determining a status of said wireless device;
circuitry for determining from said status a most likely one of said plural streets upon which said wireless device is located;
circuitry for determining said most likely street as a first one of said plural geographic locations;
circuitry for determining a first point of said plural points that is in proximity to said first geographic location; and
circuitry for entering said first point in said calibration database; and associating the location data for the first one of said plural geographic locations determined by said wireless device with the first point.
13. The system of claim 12 wherein said attribute is selected from the group consisting of: signal strength, Cell Global identity, broadcast control channel, base station identity code.
14. The system of claim 12 wherein said controller unit determines if said location data is statistically sufficient and if so, enters said location data into said location information database.
15. The system of claim 12 wherein said controller unit determines if said location data is statistically sufficient and if so enters said location data into a non-uniform grid generator.
16. The system of claim 12 wherein said controller unit sends future positioning information to said wireless device.
17. The system of claim 16 wherein said future positioning information includes at least one of a geographic position and a speed.
18. The system of claim 16 wherein said future positioning information is determined based at least in part on information from said location information database.
19. The system of claim 16 wherein said future positioning information is determined based at least in part on information from a non-uniform grid generator.
20. The system of claim 12 wherein said wireless device receives an attribute of a signal transmitted by the wireless transmitter in communication with a mobile station in said second region.
21. The system of claim 12 wherein said location database is a street database.
22. The system of claim 12 , wherein said status includes attributes selected from the group consisting of: direction of travel; speed of travel, and change in direction of travel.