Location-sensitive calibration data
First Claim
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1. A system for determining the position of a mobile station comprising:
- a location estimator for identifying an approximate position of the mobile station;
a fingerprint requestor for requesting and obtaining, through radio channel access, pertinent location fingerprint data from a fingerprint database remote from said mobile station, said pertinent location fingerprint data being indicative of the approximate position of the mobile station; and
a fingerprint comparator for comparing measured RSSI data at said mobile station with said pertinent location fingerprint data in order to determine a position of the mobile station.
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Abstract
A system, method and device are provided for determining the position of a mobile station through the identification of an approximate position of the mobile station. Thereafter received signal strength (RSSI) fingerprint data for the approximate position is requested and retrieved. The fingerprint data and received signal strength data collected at the mobile station are compared in connection with fixing the position of the mobile station.
42 Citations
24 Claims
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1. A system for determining the position of a mobile station comprising:
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a location estimator for identifying an approximate position of the mobile station; a fingerprint requestor for requesting and obtaining, through radio channel access, pertinent location fingerprint data from a fingerprint database remote from said mobile station, said pertinent location fingerprint data being indicative of the approximate position of the mobile station; and a fingerprint comparator for comparing measured RSSI data at said mobile station with said pertinent location fingerprint data in order to determine a position of the mobile station. - View Dependent Claims (2, 3, 4, 5)
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6. A mobile station comprising:
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a location approximation identification section being operable to identify and download to said mobile station a pertinent portion of a remote fingerprint database, the pertinent portion of a remote fingerprint database corresponding to a vicinity of said mobile station; a RSSI section for making RSSI measurements at said mobile station; a memory; a processor; software held in memory and run in said processor for determining a position of said mobile station by comparing said pertinent portion of said remote fingerprint database corresponding to the vicinity of said mobile station with said RSSI measurements made at said mobile station. - View Dependent Claims (7, 8, 9, 10)
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11. A system for determining the position of a mobile station comprising:
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a fingerprint database including RSSI data; a mobile station including a location estimator for identifying an approximate position of said mobile station; a fingerprint requestor for requesting and obtaining, through radio channel access, pertinent location fingerprint data from a fingerprint database remote from said mobile station, said pertinent location fingerprint data being indicative of the approximate position of the mobile station; and a fingerprint comparator for comparing measured RSSI data at said mobile station with said pertinent location fingerprint data in order to determine a position of said mobile station.
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12. A method of determining the position of a mobile station comprising:
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collecting RSSI data at a mobile station; determining an approximate location of said mobile station; selecting fingerprint look-up token data, from a database located remote from said mobile station, corresponding to said approximate location of said mobile station; comparing said fingerprint look-up token data selected from the database corresponding to said approximate location of said mobile station with said RSSI data collected at said mobile station; and determining a position of said mobile station in accordance with finding said fingerprint look-up token data of highest correlation with said RSSI data. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for determining the position of a mobile station comprising:
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means for estimating an approximate position of the mobile station; means for requesting and obtaining pertinent location fingerprint data from a fingerprint database, said pertinent location fingerprint data being indicative of the approximate position of the mobile station from the means for estimating; and means for comparing measured RSSI data at said mobile station with said pertinent location fingerprint data to determine the position of said mobile station. - View Dependent Claims (23, 24)
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Specification