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Method and apparatus for asynchronous positioning of wireless base stations

A base station and positioning reference signal technology, applied in the field of location systems, can solve problems such as inability to receive

Inactive Publication Date: 2016-05-25
QUALCOMM INC
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a satellite-based positioning system can be very accurate, in some situations it may not be able to receive signals from a sufficient number of satellite-based positioning system satellites to perform accurate position determination of a wireless mobile device
For example, in densely built cities other positioning methods may be more accurate

Method used

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  • Method and apparatus for asynchronous positioning of wireless base stations
  • Method and apparatus for asynchronous positioning of wireless base stations
  • Method and apparatus for asynchronous positioning of wireless base stations

Examples

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Embodiment Construction

[0021] Conventionally, in order to determine the range between a wireless mobile device and a base station for locating the base station, the timing of the mobile device needs to be synchronized with the base station or another base station. However, in the embodiments detailed herein, such synchronization between the mobile device performing ranging measurements and the base station (or another base station) is not required. Thus, the use of the terms asynchronous and non-synchronous refers to the lack of synchronization between the timing of the base station and the timing of the mobile device.

[0022] The location of a base station can be accurately determined by making multiple time-of-arrival (TOA) measurements as measured using the mobile device's clock and associated location measurements (eg, via GPS). TOA measurements may be made based on Position Reference Signals (PRS), which are at least broadcast by 4G LTE base stations (often referred to as eNodeBs) according to...

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PUM

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Abstract

Various arrangements for determining a location of a base station without timing synchronization are presented. A mobile device may determine that it is moving faster than a threshold velocity. The mobile device may capture a first unsynchronized time of arrival (TOA) measurement and determine an associated first location, wherein the first unsynchronized TOA measurement is based on a first unsynchronized timing measurement of a first received reference signal. The mobile device may capture a second unsynchronized TOA measurement and determine an associated second location, wherein the second unsynchronized TOA measurement is based on a second unsynchronized timing measurement of a second received reference signal. Based on the mobile device moving faster than the threshold velocity, the first location, the second location, the first unsynchronized TOA measurement, and the second unsynchronized TOA measurement may be used for determining the location of the base station.

Description

Background technique [0001] The usefulness of accurate positioning is well known. One typical form of location determination involves the use of satellite-based positioning systems such as the Global Positioning System (GPS). Although a satellite-based positioning system can be very accurate, in some situations it may not be able to receive signals from a sufficient number of satellite-based positioning system satellites to perform accurate position determination for a wireless mobile device. For example, in densely built-up cities, other positioning methods may be more accurate. Range-based positioning systems may be useful for mobile wireless devices communicating with cellular network base stations. However, in order to determine a location based on ranging information of one or more base stations, the locations of the base stations need to be known. Many wireless service providers do not make the locations of their base stations publicly available, so the locations of t...

Claims

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Application Information

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IPC IPC(8): G01S5/06G01S5/02
CPCG01S5/0226G01S5/0242G01S5/06H04W64/003H04W64/006
Inventor 孙铭本杰明·A·沃纳高伟华赛·普拉德普·文卡特拉曼
Owner QUALCOMM INC
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