Database for locating wireless terminals based on combinations of signal-strength measurements and geometry-of-arrival measurements
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United States of America Patent
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Issued Date -
Aug 26, 2004
app pub date -
Jan 5, 2004
filing date -
Feb 24, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention enables efficient storage and retrieval of signal-strength measurements and geometry-of-arrival measurements for estimating the location of a wireless terminal. A database is populated with signal-strength measurements and geometry-of-arrival measurements for each of a plurality of locations. Subsequent queries to the database enable rapid retrieval of the signal-strength measurements and geometry-of-arrival measurements, and thus enable a computationally-efficient estimate of the location of a wireless terminal based on these measurements. By supplementing signal-strength measurements with geometry-of-arrival measurements, the illustrative embodiment enables a more accurate estimate of location to be made than could be achieved with either the signal-strength measurements or the geometry-of-arrival measurements alone.
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