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Method and apparatus for positioning mobile terminal

A mobile terminal, location coordinate technology, applied in the field of mobile communications, can solve the problems of reducing the positioning accuracy of a single base station smart antenna, inaccurate measurement values, etc.

Active Publication Date: 2009-07-22
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a non-direct environment with obstacles, the AOA and delay measurement values ​​of UE signals will be inaccurate due to reflection, diffraction, etc., which reduces the positioning accuracy of the existing single base station smart antenna

Method used

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  • Method and apparatus for positioning mobile terminal
  • Method and apparatus for positioning mobile terminal
  • Method and apparatus for positioning mobile terminal

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Experimental program
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Embodiment Construction

[0075] When the existing single base station smart antenna is used for UE positioning, the positioning accuracy mainly depends on the accuracy of the two measured values ​​of AOA and time delay of the UE signal. If there is a direct path between the UE and the base station, there will be high positioning accuracy. However, due to the complexity of the wireless propagation environment, there is often not necessarily a direct path between the UE and the base station. In this case, the accuracy of the two measured values ​​of AOA and delay of the UE signal will be affected, resulting in the positioning accuracy of the UE. There is also a large error, thereby reducing the positioning accuracy of the UE.

[0076] The actual measurement shows that when the UE is far away from the base station, which is equivalent to a macro-cellular environment or a suburban environment, the AOA deviation of the UE signal is often relatively small, but the delay between the UE signal reaching the ba...

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Abstract

The present invention discloses a method for positioning UE, wherein the method comprises the following steps: measuring the angle-of-arrival AOA of UE signal and time delay of UE signal to the base station for a plurality of times; calculating the plurality of AOAs obtained by measuring for obtaining the intermediate value of AOA; calculating the plurality of time delays obtained by measuring for obtaining the intermediate value of time delay; estimating the non-perpendicular factor of environment of UE; and computing the position of UE according to the intermediate value of AOA, the intermediate value of time delay, the non-perpendicular factor and the position information of base station comprising the UE. The estimated distance is modified when the distance between UE and base station is estimated in the invention, namely the time delay of UE signal to the base station is modified thereby reducing the time delay of UE signal to the base station and the deviation to the real value. When the UE is in the non-perpendicular environment, the technical plan provided by the invention can effectively increase the positioning precision to UE. The invention also discloses a device for positioning UE.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method for locating a mobile terminal (UE) and a device for locating the UE. Background technique [0002] In recent years, with the increasing demand for location-based information services, wireless positioning technology has attracted more researchers' attention. At present, with the further development and popularization of the cellular mobile communication system, it is possible to use the position of the serving base station where the user is located, the angle of arrival (AOA, Angle of Arrival) of the UE signal and the time delay of the UE signal to reach the base station for positioning estimation, and obtain the user specific location. It is worth mentioning that in the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) technology of the third-generation mobile communication standard, due to the use of smart antenna technology, the...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W64/00H04B7/04
Inventor 吴柯维孙长果钟南李新远
Owner DATANG MOBILE COMM EQUIP CO LTD
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