Out of Luoyang (traveling to other cities), communications big data trip card its way to get the trajectory of the person to the ? "cell phone signaling data"? is analyzed and known. The specific technical principle is to obtain signaling data through the location of the base station where the user's cell phone is located, so as to know that the user is out of Luoyang, or rather, traveling to other areas.

The communications big data itinerary card was released by the China Academy of Information and Communications Technology (AICT) in conjunction with three basic telecom companies, China Telecom, China Mobile and China Unicom. It can check a user's international itinerary in addition to his or her domestic trips.

Communication big data itinerary card development:

1, February 13, 2020 onwards, the three major operators to provide SMS query itinerary service has covered more than 200 million users.

2. On February 29, 2020, SMS query was upgraded to code scanning query, and a unified web query portal was provided.

3. Starting on March 6, 2020, the function of inquiring about places visited outside China was launched on the "Communications Big Data Itinerary Card", which can check information about countries or regions outside China visited by cell phone users in the previous 14 days, and can promptly detect problems of concealment, omission and inaccurate declaration of itinerary information.

4, September 2021, in order to help the masses travel safely, the national government service platform to integrate the health code and trip code "one page can check", open Alipay's health code at the same time can see the trip code. This means that the health code, trip code in the national comprehensive realization of a page pass type "two code one".

The above content reference? Baidu encyclopedia - communication big data itinerary card