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, at the wireless device, in response to the received position request message, characteristics of signals received from at least two base stations, including at least the requester base station, wherein the characteristics comprise at least one of transmission time of arrival, ranging information, or power;
preparing a position report, at the wireless device, using the signal characteristics, wherein the position report provides information enabling determination of geographic location of the wireless device; and
transmitting, at the wireless device to the requester base station, the position report on an access channel, wherein the transmitter continues transmissions of the position report until a positioning complete message is received by the wireless communication device.
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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.
15 Citations
21 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, at the wireless device, in response to the received position request message, characteristics of signals received from at least two base stations, including at least the requester base station, wherein the characteristics comprise at least one of transmission time of arrival, ranging information, or power; preparing a position report, at the wireless device, using the signal characteristics, wherein the position report provides information enabling determination of geographic location of the wireless device; and transmitting, at the wireless device to the requester base station, the position report on an access channel, wherein the transmitter continues transmissions of the position report until a positioning complete message is received by the wireless communication device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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 at least two 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, wherein the transmitter continues transmissions of the position report until a positioning complete message is received by the wireless communication apparatus. - View Dependent Claims (8, 9, 10, 11)
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12. 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, the primary access channel being configured using its own long code mask; receiving, at a second base station, the access transmission from the mobile station on a first auxiliary access channel, the first auxiliary channel being configured using the long code mask of an adjacent sector; receiving, at a third base station, the access transmission from the mobile station on a second auxiliary access channel, the second auxiliary channel being configured using the long code mask of an adjacent sector; 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 transmitting 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 (13, 14, 15, 16)
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17. 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, the primary access channel being configured using its own long code mask; a second base station that receives the access transmission from the mobile station on a first auxiliary access channel, the first auxiliary channel being configured using the long code mask of an adjacent sector; a third base station that receives the access transmission from the mobile station on a second auxiliary access channel, the second auxiliary channel being configured using the long code mask of an adjacent sector; 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 (18, 19, 20, 21)
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Specification