How does travel itinerary Code know where we have been?

1. How does travel itinerary code know where everyone has been?

The working principle of the travel code is actually very simple, that is, by analyzing the signaling data and bill data of the mobile phone, we can judge which city base station we contacted.

In the process of using mobile phones, everyone needs to connect to the base station, whether talking, texting or surfing the Internet. The operator knows the specific information of each base station, including its location and number. Once people go somewhere to surf the Internet or make a phone call, they will contact the base station. At this time, the base station will record everyone's information, so operators can clearly know where everyone has been and these data will be uploaded to the travel code system. Scan the code and you will see the latest 60.

2. What happens when the trip code is misjudged?

Although the travel itinerary code can accurately determine the specific location of everyone, there are sometimes errors. For example, sometimes I went to a city but didn't record it, but I didn't go to another city but was recorded. What happened?

First of all, we clearly arrived in a city, but the travel itinerary code didn't record this situation.

One of the most important reasons is that the itinerary code is not recorded in every city, but is judged according to the time you stay in the local area for 4 hours.

For example, if you make a phone call or surf the Internet in a certain city, 1 the time is noon 12, then the system will record it once, and then at 4 pm, you are still surfing the Internet or making a phone call in the same city, and the base stations in other cities are not connected. At this time, the system will record it for the second time, thus judging that you have stayed in this city for more than 4 hours.

But if you stay in a city for less than 4 hours, the system will judge that you may just pass by, such as driving or taking a train, and then it will not judge that you have been to this city.

Another possibility is that you happen to be around a city, and at this time you are still using the base station in the original city, so it will not be recorded.

Huiyang in Huizhou, for example, is very close to Shenzhen. We go to Huiyang, even if we stay there for more than one day, we will not be judged as having been to Huizhou, because the place we go to is not far from Shenzhen, and the signal is still connected to the base station in Shenzhen.

Let's take a look. I didn't go to a city, but it was recorded. What happened?

At present, many netizens report that they live well in the original city, but there is a record of having been to a certain city on the itinerary code, which makes many people very puzzled. How can the system record that they have never been to this city?

There may be two reasons for this embarrassing situation.

First, signal cross coverage.

Nowadays, in order to enhance the signal and improve the communication quality, many operators will carry out signal cross coverage in two adjacent cities, which means that everyone's mobile phone may be connected to the local signal tower or the signal tower in the adjacent city. If it is connected to the signal tower of the corresponding city, it may be located in an adjacent city.

Second, there is a system error.

Judging from the reflection of many netizens, there are not many anomalies really caused by signal crossover. For example, some people are clearly in Shenzhen and have never been out of Shenzhen, but the itinerary code is in Inner Mongolia, which is a far cry from each other.

Then why is this happening? In fact, there is a system error, which is quite common among domestic mobile users.

However, as for why the error occurred, the operator did not give an accurate explanation. If everyone has never left the local area, but is located in a different place, you can call the operator's official customer service phone to inquire. If the operator verifies that everyone has never been somewhere, but travel itinerary appears immediately, you can ask them to delete it.