# US 2014/0152495 A1 · Procedure to increase position location availability > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152495 A1 - Document ID: US20140152495A1 - Status: Published application - Kind: A1 - Application number: 14/084,246 - Filed: 2013-11-19 - Published: 2014-06-05 - Earliest claimed: 2004-09-07 - Assignees: QUALCOMM Incorporated - Applicants: Qualcomm Incorporated - Inventors: Sanjeev Khushu - Web page: https://patentgrep.com/patent/US20140152495A1 ## CPC - G01S 3/14: Systems for determining direction or deviation from predetermined direction {(aerial arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00; combinations of different interacting aerial units for giving a desired directional characteristic H01Q21/29; aerials or aerial systems providing at least two radiation patterns H01Q25/00)} - G01S 5/10: Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements {, e.g. omega or decca systems}(G01S5/12 takes precedence {; beacons and receivers cooperating therewith G01S1/306, G01S1/308}) - G01S 19/01: Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A device, method and system are provide which permits the methodology used to make the position determination to change dynamically in connection with achieving a position fix of a desired accuracy. ## Claims ### Claim 1 A method of obtaining a position of a mobile station comprising: (a) determining the position of the mobile station using a first scheme of position determination, wherein the first scheme of position determination is based upon GPS, trilateration, server assisted GPS, cell identification, enhanced signal strength, angle of arrival, forward link trilateration, advanced forward link trilateration, fingerprinting or a combination thereof; and (b) if the determining does not yield an acceptable position result, repeating said determining using at least one further scheme of position determination different from said first scheme in at least one repetition until (i) a repetition returns an acceptable position result or (ii) a threshold number of available position-determining schemes have been used. ### Claim 2 (depends on 1) The method of claim 1, wherein the at least one further scheme of position determination includes three or more schemes in addition to the first scheme of position determination. ### Claim 3 (depends on 1) The method of claim 1, wherein the at least one further scheme of position determination is based upon GPS, trilateration, server assisted GPS, cell identification, enhanced signal strength, angle of arrival, time difference of arrival, forward link trilateration, advanced forward link trilateration, fingerprinting or a combination thereof. ### Claim 4 (depends on 1) The method of claim 1, wherein the first scheme of position determination or the at least one further scheme of position determination includes a cell identification scheme, and wherein the cell identification scheme is based upon measurements of wireless communication signals by the mobile station, wherein the measured wireless communication signals identify cells from which the measured wireless communication signals are transmitted. ### Claim 5 (depends on 4) The method of claim 4, wherein the wireless communication signals correspond to pilot signals. ### Claim 6 (depends on 4) The method of claim 4, wherein the cell identification scheme corresponds to an advanced forward link trilateration scheme. ### Claim 7 (depends on 1) The method of claim 1, wherein the first scheme of position determination or the at least one further scheme of position determination includes an enhanced signal strength scheme, and wherein the enhanced signal strength scheme is based upon transmissions from a plurality of terrestrial wireless transmitters. ### Claim 8 (depends on 7) The method of claim 7, wherein the plurality of terrestrial wireless transmitters correspond to base stations. ### Claim 9 (depends on 1) The method of claim 1, wherein the first scheme of position determination or the at least one further scheme of position determination includes a fingerprinting scheme, and wherein the fingerprinting scheme is based upon radio frequency (RF) data that is transmitted by a set of transmitters and measured at the mobile station. ### Claim 10 (depends on 9) The method of claim 9, wherein the RF data includes multi-path signals that result from indirect paths between the mobile station and the set of transmitters. ### Claim 11 (depends on 9) The method of claim 9, wherein the set of transmitters corresponds to a set of base stations. ### Claim 12 An apparatus configured to obtain a position of a mobile station comprising: means for determining the position of the mobile station using a first scheme of position determination, wherein the first scheme of position determination is based upon GPS, trilateration, server assisted GPS, cell identification, enhanced signal strength, angle of arrival, forward link trilateration, advanced forward link trilateration, fingerprinting or a combination thereof; and means for repeating said determination if the determination does not yield an acceptable position result using at least one further scheme of position determination different from said first scheme in at least one repetition until (i) a repetition returns an acceptable position result or (ii) a threshold number of available position-determining schemes have been used. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the at least one further scheme of position determination includes three or more schemes in addition to the first scheme of position determination. ### Claim 14 (depends on 12) The apparatus of claim 12, wherein the at least one further scheme of position determination is based upon GPS, trilateration, server assisted GPS, cell identification, enhanced signal strength, angle of arrival, time difference of arrival, forward link trilateration, advanced forward link trilateration, fingerprinting or a combination thereof. ### Claim 15 An apparatus configured to obtain a position of a mobile station comprising: a processor configured to: determine the position of the mobile station using a first scheme of position determination, wherein the first scheme of position determination is based upon GPS, trilateration, server assisted GPS, cell identification, enhanced signal strength, angle of arrival, forward link trilateration, advanced forward link trilateration, fingerprinting or a combination thereof; and repeat said determination if the determination does not yield an acceptable position result using at least one further scheme of position determination different from said first scheme in at least one repetition until (i) a repetition returns an acceptable position result or (ii) a threshold number of available position-determining schemes have been used. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the at least one further scheme of position determination includes three or more schemes in addition to the first scheme of position determination. ### Claim 17 (depends on 15) The apparatus of claim 15, wherein the at least one further scheme of position determination is based upon GPS, trilateration, server assisted GPS, cell identification, enhanced signal strength, angle of arrival, time difference of arrival, forward link trilateration, advanced forward link trilateration, fingerprinting or a combination thereof. ### Claim 18 A non-transitory computer-readable medium containing instructions stored thereon, which, when executed by an apparatus configured to obtain a position of a mobile station, cause the apparatus to perform operations, the instructions comprising: at least one instruction to determine the position of the mobile station using a first scheme of position determination, wherein the first scheme of position determination is based upon GPS, trilateration, server assisted GPS, cell identification, enhanced signal strength, angle of arrival, forward link trilateration, advanced forward link trilateration, fingerprinting or a combination thereof; and at least one instruction to repeat said determination if the determination does not yield an acceptable position result using at least one further scheme of position determination different from said first scheme in at least one repetition until (i) a repetition returns an acceptable position result or (ii) a threshold number of available position-determining schemes have been used. ### Claim 19 (depends on 18) The non-transitory computer-readable medium of claim 18, wherein the at least one further scheme of position determination includes three or more schemes in addition to the first scheme of position determination. ### Claim 20 (depends on 18) The non-transitory computer-readable medium of claim 18, wherein the at least one further scheme of position determination is based upon GPS, trilateration, server assisted GPS, cell identification, enhanced signal strength, angle of arrival, time difference of arrival, forward link trilateration, advanced forward link trilateration, fingerprinting or a combination thereof.