Method for reaching time difference positioning

A technology of time difference positioning and time difference, which is applied in the field of time difference of arrival positioning, can solve the problems such as the inability to perform TDOA positioning, and achieve the effect required by high positioning accuracy

Inactive Publication Date: 2008-11-12
GLOBAL INNOVATION AGGREGATORS LLC
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0034] The present invention provides a time difference of arrival (TDOA) positioning method, which is used to solve the problem in the prior art that TDOA positioning cannot be performed when the terminal user equipment (UE) does not support OTDOA measurement

Method used

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  • Method for reaching time difference positioning
  • Method for reaching time difference positioning
  • Method for reaching time difference positioning

Examples

Experimental program
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Embodiment Construction

[0056] see figure 2 , is a flow chart of the method steps of the present invention, and its specific implementation steps include:

[0057] Step S11, SRNC receives the positioning request message, and starts the positioning measurement process;

[0058] Step S12, the SRNC obtains the positioning capability information of the UE through the relevant information elements carried in the RRC connection establishment completion message or the UE capability query response message;

[0059] Step S13, judging whether the UE supports OTDOA measurement according to the obtained UE positioning capability information, if the UE has the OTDOA measurement capability, then perform step S14, otherwise, perform step S15;

[0060] Step S14. Execute the conventional OTDOA measurement process, and issue positioning measurement control, so that the UE performs inter-cell SFN-SFN observed time difference (SFN-SFN observed time difference type 2) measurement in specified same-frequency cells belon...

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Abstract

The present invention discloses arrival time difference positioning method. It contains A, service radio network controller (SRNC) receiving positioning request message and obtaining end user device (UE) positioning ability information; B, SRNC according to said positioning ability information and UE current channel condition, indicating UE to make measuring to appointed different base station cell; C, UE to make measuring to said cell and reporting code offset measured value (Tm) and frame offset measured value (OFF) to SRNC; D, SRNC utilizing said measured value to make positioning calculation and reporting positioning result information. The present invention makes network free from UE ability and capable of adopting TDOA positioning method to complete higher positioning accuracy requirement.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a time difference of arrival (TDOA) positioning method. Background technique [0002] 1. OTDOA positioning technology [0003] The two reference points in the system are two base stations. Through a series of measurements, the time difference TDOA between the mobile station and the wireless signal transmission of the two reference points is obtained. This time difference multiplied by the speed of light is the distance difference between the mobile station and the two reference points. The mathematical meaning of this distance difference is that the possible trajectory of the mobile station's position is a hyperbola with these two reference points as the focus and the distance difference as the fixed difference; and if another pair of reference points (there can be a reference The point is the same as the above) to do the same measurement and calculation, then, another traj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04W64/00
Inventor 任学亮
Owner GLOBAL INNOVATION AGGREGATORS LLC
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