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A-GPS positioning method and system

A positioning method, GPS time technology, applied in the field of GPS satellite positioning, can solve the problems of A-GPS positioning accuracy, inaccuracy, complex transmission medium, etc., to achieve the effect of improving accuracy and ensuring accuracy

Inactive Publication Date: 2006-09-27
HUAWEI TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

Due to the long transmission distance between Node B and RNC and the complex transmission medium, Node B cannot transmit the time of the GPS satellite system to the SMLC module on the RNC in time, resulting in the lag and inaccuracy of the GPS time at the SMLC, which further leads to the failure of A-GPS positioning poor precision

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  • A-GPS positioning method and system
  • A-GPS positioning method and system
  • A-GPS positioning method and system

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Embodiment Construction

[0041] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

[0042] The present invention is equipped with an A-GPS receiver on the RNC. The A-GPS receiver continuously receives GPS satellite signals, extracts GPS time and GPS original information from it, and can directly transmit the GPS original information and GPS time to the SMLC module. Ensure that the SMLC module is provided with highly accurate GPS time. image 3 The structure diagram of the A-GPS receiver in the RNC is given. The figure includes GPS antenna, GPS receiver, clock module, main control module, and SMLC module. The GPS antenna and GPS receiver form the GPS signal receiving system, namely the A-GPS receiver, which is responsible for receiving GPS satellite signals, performing related processing, and outputting GPS clock signals to the RNC clock module through the high-speed ch...

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Abstract

This invention relates to an A-GPS positioning method and system. The A-GPS receiver on RNC continual receives GPS satellite signal to extract and send GPS time to the SMLC module for time calibration; when received navigation request, the SMLC builds and sends GPS auxiliary information to user terminal according to GPS time, received original information and user subzone position; terminal completes pseudo-range measurement by the received information and reports the result to the SMLC; the latter obtains the user terminal position. This invention improves A-GPS navigation precision.

Description

Technical field [0001] The invention relates to the field of GPS satellite positioning, in particular to an A-GPS positioning method and system. Background technique [0002] Network-assisted Global Positioning System (A-GPS) belongs to the standard positioning method of the 3rd Generation Partner Projection (3GPP). This method is a combination of network base station information and GPS information for users. The technology of terminal positioning. [0003] The A-GPS positioning system structure defined by 3GPP is as follows figure 1 As shown, the system includes a GPS satellite system, a user terminal (UE) equipped with a GPS signal receiving and processing module, a base station (Node B), an A-GPS receiver configured on the Node B, and a radio network controller (RNC) , Mobile Positioning Service Center (SMLC) module, Mobile Switching Center (MSC), Mobile Positioning Center Gateway (GMLC) and Positioning Service Client (LCS Client) on RNC. The GPS satellite system refers to t...

Claims

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Application Information

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IPC IPC(8): G01S1/08G01S5/02H04L12/28G01S19/42
Inventor 易开祥
Owner HUAWEI TECH CO LTD