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How mobile phones are positioned

Source: Internet
Author: User
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Value:
There's no need to say it, everybody knows.

Way:

  • GPS requires three or more geostationary satellites for positioning, two satellites are not, because there will be two possible values
  • WiFi signal based on the phone connected to the WiFi signal source to determine the location of the phone, if it is a mobile WiFi signal source, it is not accurate
  • Base station signal Base station in the world has a unique ID, if the phone can get to the surrounding base station ID, it can also be based on GPS positioning the same principle to locate
  • IP assignment globally is geographically, but not highly accurate
  • Bluetooth
  • Magnetic field

How mobile phones are positioned

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