How does the itinerary code know where you have been in 14 days?

Recently, due to the epidemic situation, all localities need to show their travel codes to travelers, and everyone is curious about the operation mode of the travel codes. How does the itinerary code know where you have been in 14 days? 14 day trip code record is accurate or not? Travel code is a service launched after the epidemic. Let's first take a look at the introduction of the operation method of the trip code.

How does the itinerary code know where you have been in 14 days?

The trip code is implemented according to the communication service provided by telecom operators.

As we all know, the normal communication services of mobile phones (call, SMS, Internet access) are realized by the communication base station of operators. The communication base station is what we call a "signal tower". With the cell tower, our mobile phones will have a signal.

Each of us has our own ID number, and the ID number is unique. We can find a person accurately through the ID number. Similarly, each communication base station also has its own "ID number" (base station number), and the base station number of each base station is unique. Through the base station number, you can quickly find the location of the base station.

The working principle of trip code is to determine the position we have experienced according to the base station signal received by our mobile phone within 14 days, thus listing our approximate trip. For example, Zhang San stayed in a certain place in Hebei for 14 days and received signals from two base stations, the base station numbers are 12345/23456 respectively. In this way, when he applies for his own itinerary code, he must first authorize the operator to inquire, and then he can roughly know that his itinerary is somewhere in Hebei through two base station numbers.

There is another situation. For example, you drive from Shijiazhuang, Hebei Province to Beijing, but your itinerary code will include Baoding, Hebei Province. But in your heart, you have never been to Baoding. Because you passed Baoding on your way to Beijing, your mobile phone received the signal from the base station in Baoding area, so there will be a record of Baoding area in your trip.

Of course, the trip code is only an auxiliary means of epidemic prevention and control. In the event of an epidemic, the most accurate is the flow adjustment work carried out by professional flow adjustment staff. Therefore, during the epidemic period, we are not only responsible for ourselves, but also responsible for society and others by cooperating with the implementation of policies and the adjustment of epidemic situation.

The above is an introduction about how the trip code knows where you have been in 14 days. You can pay attention to it and pay more attention to our use of trip codes.