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Method and system for measuring location using round trip time in asynchronous wcdma network

A round-trip time, mobile terminal technology, applied in the direction of radio wave measurement system, satellite radio beacon positioning system, measurement device, etc.

Inactive Publication Date: 2009-06-10
KT FREETEL CO LTD
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  • Abstract
  • Description
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Problems solved by technology

This leads to many errors in position estimates

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  • Method and system for measuring location using round trip time in asynchronous wcdma network
  • Method and system for measuring location using round trip time in asynchronous wcdma network
  • Method and system for measuring location using round trip time in asynchronous wcdma network

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Embodiment Construction

[0072] Herein, some embodiments of the present invention will be described with reference to the accompanying drawings.

[0073] Figure 5 The structure of the position estimation system according to the first embodiment of the present invention is illustrated as an example.

[0074] Although Figure 5 It is assumed that the position estimation system according to the first embodiment of the present invention is a position estimation system in a CDMA network, but it is well known to those skilled in the art that the present invention can be applied to another mobile communication system such as a WCDMA network.

[0075] Such as Figure 5 As shown in , the position estimation system may include a repeater 200, a base station 400, a base station controller 400, a mobile switching center (MSC) 500, a home register (HLR) 510, a packet data serving node (PSDN) 600, and a position estimation device 700 , a network management system (NMS) 520 and an operations management (O&M) ser...

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Abstract

The present invention discloses a method and system for estimating a position by using round trip time information in a mobile communication network. According to an embodiment of the present invention, a system estimating a position of a mobile terminal includes a base station, computing round trip time information of a mobile terminal; a base station controller, receiving the round trip time information of the mobile terminal; a repeater, expanding a service coverage of the mobile terminal; a round trip time measuring unit, being connected to the repeater and measuring round trip time information of the repeater; and a position estimating device, estimating the position of the mobile terminal by using the round trip time formation of the mobile terminal and the round trip time information measured by the round trip time measuring unit. With the present invention, a position of the mobile terminal can be exactly computed by using round trip time and information, stored in a network management system.

Description

【Technical field】 [0001] The present invention relates to a method and system for estimating position using round-trip time information in a mobile communication network, and more particularly to a method and system for accurately estimating the position of a mobile terminal using round-trip time information. 【Background technique】 [0002] Many algorithms and detailed methods have been developed for tracking location in mobile communication networks. [0003] Qualcomm proposes gpsOne (snapshot tracking) for synchronous CDMA networks. For the asynchronous WCDMA network, the OTDOA method, the A-GPA method, the method using the cell ID and the method using the round-trip time (RTT) are proposed. [0004] Here, the round trip time may be referred to as RTD (Round Trip Delay) in synchronous CDMA networks and RTT (Round Trip Time) in asynchronous WCDMA networks. [0005] gpsOne mainly uses GPS measurement data, PN phase, cell ID and RTD measured by the mobile terminal and provi...

Claims

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Application Information

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IPC IPC(8): H04B7/26G01S5/02
CPCG01S19/42H04B7/2631H04L47/283
Inventor 金信才
Owner KT FREETEL CO LTD
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