Small shape, suitable for pet body
2018-09-10

There are two kinds of mobile phone positioning technology, one is based on GPS positioning, the other is based on mobile operation network base station positioning.
The gps-based positioning method USES the GPS positioning module on the mobile phone to receive the signals from the GPS satellite and use these signals for navigation and positioning.
Base station positioning is to use the base station to determine the distance of the phone to determine the location of the phone. The latter does not require the phone to have GPS positioning capability, but the accuracy depends largely on the distribution of base stations and the size of the coverage area, sometimes with an error of more than one kilometer. The former has high positioning accuracy. There are also ways to use Wifi to locate within a small area.
Positioning of base station
Mobile phone location is the use of GSM mobile communication network cellular technology to achieve the location of information query, GSM wireless communication network is built by a lot of cells like bee honeycomb, each cell has its own number, through the identification number of the cell phone can know the cell phone is located in the area. The current cell phone community positioning technology is still in the improvement, the urban accuracy range is roughly 10 meters, the suburban accuracy range is roughly 10 meters ~5 meters, with the continuous development of mobile company technology, I believe the accuracy will be further improved to 10 meters.
At the same time, the currently displayed landmark name is still under optimization, with further optimization, the landmark will be more accurate. Currently, there are two ways to locate mobile phones: WAP version and SMS version. The SMS version of mobile location is relatively easy to use, and the WAP version of the phone shows your location through a map. As long as there is corresponding receiving equipment, will be able to receive any call information, mobile communication process, this is the use of mobile phones to language signal transmission to the mobile communication network, and then by the mobile communication network language signals into the electromagnetic spectrum, recipient by communication satellite radiation transmitted to the telecommunications network, the communication equipment to receive wireless electromagnetic waves by the words, then converted into language signal through communication network.
Therefore, mobile communication is an open electronic communication system. As long as there is a corresponding receiving device, it can receive the call information of anyone at any time, anywhere. There are many examples of cell phone communications leading to leaks. Zubaydah was arrested for using a mobile phone to expose his hideout. In April 1996, Alexander dudayev, the leader of a Russian rebel group in chechnya, was killed by Russian missiles after his cell phone was leaked. With the development of communication technology, mobile phones have become "self-reported" -- for example, some mobile phones have the function of location service, through which others can track your location at any time; In Taiwan, there is a thriving market for a spy phone that is, in effect, a cellphone locator.
Professional mobile phone location, general origin of the United States. The principle is completely different from other kinds of mobile phone location. It is directly intercepted from the air mobile phone signals, by decoding the implementation of 2 lines to determine a point. The scariest part is that such locators are not only invisible to the listener, but are also supported by hardware as well as software. They are banned in China.

 

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