Mobile phone location

Mobile phone location by means of wireless terminal ( mobile phone ) and the wireless network with the mobile user, determining the actual position (latitude and longitude coordinates data, including data ), through the SMS, MMS, voice is sent to the user or as a basis to provide some value-added services.

The definition of mobile phone positioning

Mobile phone location is defined by specific positioning technology to access the mobile phone or terminal user position information ( latitude and longitude coordinates ), the electronic map is positioned object location technology or service. Positioning technology to have two kinds, one is based on the GPS positioning, one is based on the mobile network base station location. GPS based localization method is the use of the GPS mobile phone positioning module will own the location signal is sent to the background to achieve the positioning of mobile phone positioning. The base station positioning is the use of mobile phone base station distance measuring distance to determine the location of the mobile phone. The latter does not need a mobile phone with a GPS positioning capability, but the accuracy depends largely on the base station distribution and coverage of the size, sometimes error will be over a kilometre. The former high positioning accuracy.

The latest mobile phone positioning technology is AGPS ( AssistedGPS: Assisted Global Positioning System ), it uses the communication base station information to assist GPS module for mobile phone positioning, the main improvement is the

In 1, indoor no GPS signal using the base station positioning to provide the location information, reduce the positioning blind spots;

In 2, with pure GPS and pure base station location, AGPS has higher precision, can be accurate to 10 meters;

In the GPS module to start the search star stage, through the base station location to determine the approximate location of positioning mobile phone, mobile phone through the presence of the GPS satellite ephemeris figure, can quickly search star, the star of stage time by 2-3 minutes, shortened to 10 seconds.