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Transmission time difference measurement method and system thereof

一种传输时间差、测量方法的技术，应用在传输系统、数字传输系统、无线电波测量系统等方向，能够解决新安装LMU等问题

Inactive Publication Date: 2007-02-14
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0079] However, in the RTD measurement method using GPS time established in 3GPP standard document TS25.301, hardware capable of receiving GPS signals must be installed on the base station
[0080] In addition, although RTD measurements using LMUs specified in TS25.301 can be considered, there is also the disadvantage of newly installing many LMUs

Method used

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  • Transmission time difference measurement method and system thereof
  • Transmission time difference measurement method and system thereof
  • Transmission time difference measurement method and system thereof

Examples

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Embodiment Construction

[0111] The present invention is applied to a transmission time difference measurement system comprising a terminal, two or more base stations each operating asynchronously, and a control terminal and a control device for each base station.

[0112] The control device includes: a measurement request function that issues a request to the terminal and each base station to perform measurement; and a storage function that stores the signal transmission time difference of the base station in association with the calculation time when the transmission time difference has been calculated. In addition, each base station includes a round-trip time measurement function. When receiving a measurement request sent by the control device using the measurement request function, the round-trip time of the signal to and from the terminal is measured. Each terminal also includes a turnaround time measurement function for measuring the turnaround time from receiving a signal from the base station t...

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Abstract

The propagation time (1605) of signals between a terminal (1304) and a base station (1302) is calculated from the round-trip time (1601) of signals between the terminal (1304) and the base station (1302) and the turn-around time (1603) from the reception by terminal (1304) of a signal from base station (1302) until the transmission of the signal to the base station (1302). The propagation time (1606) of signals between the terminal (1304) and another base station (1303) is similarly calculated. The difference between the propagation times (1605 and 1606) and the arrival time difference (1607) that is calculated in the terminal (1304) are then compared to calculate the transmission time difference (1608) between the base stations (1302 and 1303).

Description

technical field [0001] The present invention relates to a transmission time difference measurement method and system in the field of mobile communication, in particular to a transmission time difference measurement method and system for measuring the transmission time difference between base stations when determining the geographical position of a mobile station in a wireless communication network. Background technique [0002] In recent years, various methods for locating portable telephone terminals (hereinafter referred to as "terminals") have been reported. Many standardization organizations have developed standards for positioning methods and positioning sequences for terminal positioning. [0003] The 3rd Generation Partnership Project (hereinafter referred to as "3GPP"), which is one of the standardization organizations and has established the W-CDMA standard, is working on the standardization of positioning methods and positioning sequences. Three positioning method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/34G01S5/12G01S5/14G01S19/12G01S19/48H04L7/00H04W24/00H04W64/00
CPCG01S5/021H04W56/006H04W56/0065
Inventor 松田淳一仓岛显尚
Owner NEC CORP