The Industry Ruling the Country

The United States reached a level where people can not leave for a long time without being welcomed by advertisements. No matter where you are in the advertisement, no matter how lonely life is in your life. They are displayed on most pages of the Internet, appear on the app's phone, and become dirty along the road. For most people, almost all the corners have been advertised on the face, which is the second property. Compared with other countries, our country likes advertising in particular because it is a billion dollar industry domestically.

In principle, each country can set its own frequency assignment rules for RFID tags. Not all countries offer all radio bandwidth. These frequencies are called ISM band (industrial science and medical band). The reply signal of the tag may cause interference with other wireless users. In North America, UHF is permitted to use at 902 to 928 MHz (center frequency 915 MHz ± 13 MHz), but transmission power is limited. In Europe, RFID and other low power radio applications are regulated by ETSI Recommendation EN 300 220 and EN 302 208 and ERO Recommendation 70 03, RFID operation can have complex band limitation of 865 to 868 MHz I will. The reader needs to listen to that channel before sending the channel ("listen first"), this requirement limits the performance to some extent and its solution is the subject of current research.

Citizens have different rules for each country to rule over how to live. To make matters worse, almost every country has a regional or national boundary (federal) and has its own specific rules. Although these rules were developed with specific demographics in mind, it is needless to say that most of the state funds needed to maintain law and order, but effective of all these rules Implementation is a pain. For example, some countries legitimize the use of marijuana for recreation. In other words, it is not necessary to spend 1 cents to track illegal vendors, but for countries that have not yet been legalized, funds are used to provide homeless residences and improve the quality of education I can do it.