Deciphering the History of Development and Change of Mobile Communication Technology What is communication? (3)
3G: The third-generation mobile communication standard
3G is divided into four standard formats, namely CDMA2000, WCDMA, TD-SCDMA, and WiMAX. Among the many standards of 3G, the word CDMA has the highest exposure rate. CDMA is the abbreviation of Code Division Multiple Access, which is the technical foundation of the third-generation mobile communication system.
CDMA system shows great potential for development due to its simple frequency planning, large system capacity, high-frequency reuse coefficient, strong anti-multipath capability, good communication quality, soft capacity, and soft handover.
4G: Wireless cellular phone communication protocol 100Mbps download speed
4G network refers to the fourth-generation wireless cellular phone communication protocol. It is a technical product that integrates 3G and WLAN and can transmit high-quality video images and image transmission quality comparable to high-definition television. The 4G system can download at 100Mbps, which is 2,000 times faster than dial-up, and upload at 20Mbps.
4G products are more abundant
Nowadays, 4G signal coverage is very extensive. There are more and more mobile phones and tablet products that support TD-LTE and FDD-LTE. Many tablets support 4G network as standard. Android and Win system tablets that support call function and network are also available. Very common.
There is no doubt that 4G networks have greatly increased the speed of mobile connections. For many of us, this is a huge step forward from a fixed connection.
For users, the biggest difference between 2G, 3G, and 4G networks is the different transmission speeds. As the latest generation of communication technology, 4G networks have greatly improved the transmission speed. In theory, the network speed is 50 times that of 3G, and the actual experience is about 10 times. The Internet speed is comparable to 20M home broadband, so the 4G network can have a very smooth speed. Watching high-definition movies, big data transmission speed is very fast.
