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Method for terminal location in SCDMA system

A technology for positioning terminals and terminals, applied in positioning, radio wave measurement systems, measuring devices, etc., can solve the problems of not using positioning technology, and achieve the effect of low cost and precise positioning

Inactive Publication Date: 2009-02-11
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the existing SCDMA system, no positioning technology has been adopted

Method used

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  • Method for terminal location in SCDMA system
  • Method for terminal location in SCDMA system
  • Method for terminal location in SCDMA system

Examples

Experimental program
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Embodiment Construction

[0024] When the terminal communicates with the base station, the terminal calculates the straight-line distance from the current serving base station through the length of the guard time slot converted between receiving and transmitting. The calculation basis and method are as follows: figure 1 shown.

[0025] After the terminal successfully establishes the link, it maintains the two-way synchronization of receiving and transmitting signals with the base station. At this time, a physical quantity Pre_Tx maintained by the terminal represents the time length between the terminal receiving the last sample value transmitted by the base station and the terminal transmitting the first sample value. As shown in the figure, since the two-way synchronization is strictly maintained, the Pre_Tx of the terminal represents the difference between the ideal guard time slot length from the end of base station transmission to the start of reception and the air signal delay. In addition, due t...

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Abstract

This invention provides one SCDMA system position terminal method, which comprises the following steps: a, receive terminal computes the distance to current service base station through receive and emission conversion at terminal and base station communication; b, using safe network principle through terminal test for adjacent signals and computing distance between servo stations; c, terminal provides above information to network by use of geometry relationship and for accurate position terminal according to three near stations longitude or latitude information.

Description

technical field [0001] The invention relates to a method for locating a terminal in cellular mobile communication, in particular to a method for locating an SCDMA terminal in a Synchronous Code Division Multiple Access (SCDMA) system. Background technique [0002] In the mobile communication system, there are mainly the following positioning methods: [0003] Category 1: Network Independent Positioning [0004] a. COO (Cell Of Origin) positioning technology [0005] b. TOA (Time Of Arrival) positioning technology [0006] c. Angle arrival AOA (Arrival Of Angle) positioning technology [0007] d. TDOA (Time Difference Of Arrival) positioning technology [0008] e. Enhanced Observed Time Difference E-OTD (Enhanced-Observed Time Difference) positioning technology [0009] The second category: mobile phone independent positioning, mobile phone plus GPS module positioning [0010] The third category: joint positioning, that is, the combination of mobile phone positioning fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38G01S5/10H04W64/00
Inventor 梁敏吉亚平
Owner BEIJING XINWEI TELECOM TECH