Will the epidemic travel track be exposed?

Whether you unplug the SIM card or turn it off, or use a non-smart phone, as long as you carry it with you, operators can use magical big data to find out your action track in a short time. From this perspective, the operator is always by your side, and all your trips are clear at a glance.

Travel codes know where they are.

1, base station positioning

At present, the base stations built by the three major operators basically cover the whole country. When we move with our mobile phones, the access base stations will also change constantly, just like the B base station with strong signal and the A base station with weak signal. In any case, the two base stations A and B will analyze the received cell phone signal parameters, and then determine the location of the cell phone through a series of professional codes.

Base station is the most basic and important way to locate mobile phones. Travel code (communication big data travel card) knows where you have been, mainly because of its credit.

2. Wireless network positioning

Our common wireless router is equivalent to a scaled-down base station, and each router has a unique MAC address. When the mobile phone is successfully connected, the location information of the mobile phone will be fed back to the router terminal system.

3.GPS positioning

Mobile phones generally have location information service functions, such as maps, location information and navigation functions. These are all connected to the satellite navigation system in the sky. As long as the satellites in the sky are still there, it is bound to leave position information. Both the base station and wireless positioning are to find out your range, and there is a certain position deviation, while GPS positioning is very accurate, and the error will not exceed 15 meters.