Improved positioning system and cellular communication network

A positioning system, mobile communication network technology, applied in satellite radio beacon positioning system, communication between multiple stations, positioning and other directions, can solve problems such as unprofitability and increased accuracy

Inactive Publication Date: 2003-10-15
LENOVO INNOVATIONS LTD HONG KONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is an unprofitable and expensive scheme from the network side, it involves the purchase of additional hardware locations, but the accuracy of the submitted locations only increases with the square root of the number of FPUs

Method used

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  • Improved positioning system and cellular communication network
  • Improved positioning system and cellular communication network
  • Improved positioning system and cellular communication network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] A number of base stations 20 and a number of additional position fixing units (AFPUs) 26 are arranged in the service area of ​​a mobile communication network, such as a cellular communication network. exist figure 2 In the example shown, there are three base stations and two AFPUs. Mobile devices such as mobile handsets are able to move around the area.

[0034] Base stations 20 are arranged at respective known locations to provide communication services to mobile devices 24 . The base station 20 transmits known signals at set times for use in acquiring location data. The mobile unit 24 has the function of an ordinary cellular handset and is also provided with timing determining means 25 for determining the time of arrival of the known signals from each base station. The mobile device 24 notifies the base station 20 of the signal timing from each base station 20 .

[0035] The AFPU 26 has the ability to determine its current location via a satellite positioning syst...

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Abstract

A location system for use in a mobile communication network includes base stations which transmit known signals at predetermined times for use in deriving location data; a first transmitting and receiving units; a unit for determining times of arrival of the known signals from each base station at each of the first transmitting and receiving units; a unit for determining times of arrival of the known signals from each base station at a second transmitting and receiving unit at an unknown location; a comparing unit for comparing timing differences between the known signals received at the first transmitting and receiving units and the second transmitting and receiving unit; and location determining unit for determining the location of the second unit. Each of the first transmitting and receiving units includes a unit for deriving its location from a further set of received signals such as GPS signals.

Description

technical field [0001] The invention relates to a positioning system for use in a mobile communication network, such as a cellular communication system. Background technique [0002] Many different arrangements have been proposed for determining the location of a mobile device in a cellular communication network. One of the most commonly used of these is known as EOTD (Enhanced Offset Time Differentiation, or Enhanced Observation Time Differentiation). The system works by measuring, in the mobile unit, the time difference between certain signals arriving from different base stations. This measurement requires three or more base stations. This creates a skew between signals from different base stations, which is reported back to the network. Appropriate processing in the network can compare this offset with equivalent data from measurements made at known fixed locations. This comparison then allows the calculation of the location of the handset in relation to the base sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/14G01S5/00G01S5/14G01S19/42H04W64/00
CPCG01S5/0063G01S5/14H04W64/00
Inventor R·奥姆森
Owner LENOVO INNOVATIONS LTD HONG KONG
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