Improved positioning system and cellular communication network
一种定位系统、移动通信网络的技术,应用在卫星无线电信标定位系统、多个站之间的通信、定位等方向,能够解决精确性增加、不盈利等问题
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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. In the example shown in Figure 2, 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 system s...
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