USING MULTIPLE ACCESS CHANNELS FOR WIRELESS DEVICE POSITIONING
First Claim
Patent Images
1. A method for wireless communications implemented by a wireless device, comprising:
- receiving, at the wireless device, a position request message from a requester base station;
measuring, in response to the received position request message, characteristics of signals received from multiple base stations, including the requester base station;
preparing a position report using the signal characteristics, wherein the position report provides information enabling determination of geographic location of the wireless device; and
transmitting the position report.
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Abstract
A wireless device performs a transmission on a primary and auxiliary access channels to enable reception by at least three base stations. The base stations perform a measurement on the received transmission, e.g., a time of arrival of the transmission. The base stations report their measurements to a position determination entity. The position determination entity estimates geographic position of the wireless device. One method used by the position determination entity includes tri-lateralization based on the received measurement reports.
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Citations
14 Claims
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1. A method for wireless communications implemented by a wireless device, comprising:
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receiving, at the wireless device, a position request message from a requester base station; measuring, in response to the received position request message, characteristics of signals received from multiple base stations, including the requester base station; preparing a position report using the signal characteristics, wherein the position report provides information enabling determination of geographic location of the wireless device; and transmitting the position report. - View Dependent Claims (2, 3, 4)
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5. A wireless communications apparatus, comprising:
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a receiver that receives a position request message from a base station; a signal measurer that measures characteristics of signals received from multiple base stations; a report preparer that prepares, in response to the received position request message, a position report using the signal characteristics; and a transmitter that transmits the position report on an access channel. - View Dependent Claims (6, 7, 8)
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9. A method of facilitating determination of position of a mobile station, the method implanted in a wireless network, comprising:
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receiving, at a first base station, an access transmission from a mobile station on a primary access channel; receiving, at a second base station, the access transmission from the mobile station on a first auxiliary access channel; receiving, at a third base station, the access transmission from the mobile station on a second auxiliary access channel; generating, based on the access transmission, a first positioning report at the first base station; generating, based on the access transmission, a second positioning report at the second base station; generating, based on the access transmission, a third positioning report at the third base station; and communicating the first positioning report, the second positioning report and the third positioning report to a position determination entity operating in the wireless communications network for estimating position of the mobile station. - View Dependent Claims (10, 11)
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12. A system for facilitating determination of position of a mobile station, comprising:
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a first base station that receives an access transmission from a mobile station on a primary access channel; a second base station that receives the access transmission from the mobile station on a first auxiliary access channel; a third base station that receives the access transmission from the mobile station on a second auxiliary access channel; and a position determination entity that determines the position of the mobile station; wherein the first base station generates, based on the access transmission, a first positioning report and transmits the first positioning report to the position determination entity; wherein the second base station generates, based on the access transmission, a second positioning report and transmits the second positioning report to the position determination entity; and wherein the third base station generates, based on the access transmission, a third positioning report and transmits the third positioning report to the position determination entity. - View Dependent Claims (13, 14)
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Specification