ANDROID132 360 05 Mobile phone Location

1 . Network positioning: Based on IP address location, according to the IP address in the actual address database to query the actual address. Cons: Dynamic IP causes an inaccurate address.  2. Base Station positioning: 3 base stations can determine the actual location, the positioning range is hundreds of meters to a few kilometers ranging.  3. GPS positioning: The U.S. satellite positioning system (Beidou positioning is China's), at least 3 satellites can be located, GPS using 24 satellites can cover the global 90% range, GPS does not need the network as long as the satellite signal can be accepted, positioning accuracy of more than a few meters to dozens of meters. The disadvantage is the vulnerability to cloud and building disturbances.  4. Android using A-GPS (auxiliary GPS positioning System), to compensate for the shortcomings of GPs positioning, can be through the network and GPS co-location, if the GPS signal is not strong with the network, the network signal is not strong using GPS. The range is a few meters to dozens of meters.

ANDROID132 360 05 Mobile phone Location