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
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[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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