3G is the third generation mobile communication technology, which refers to the cellular mobile communication technology that supports high-speed data transmission. 3G services can transmit voice and data information at the same time, and the rate is generally over several hundred kbps. 3G refers to a new generation of mobile communication systems that combine wireless communications with multimedia communications such as the Internet. Currently 3G has three standards: CDMA2000, WCDMA, and TD-SCDMA. The peak theory of 3G downlink speed can reach 3.6Mbit / s (say, 2.8Mbit / s), and the peak speed of uplink can also reach 384kbit / s. It cannot be 2G per second like the Internet said, and of course, downloading a movie cannot be completed instantly.

4G is the fourth-generation mobile phone mobile communication standard, which refers to the fourth-generation mobile communication technology. Foreign language abbreviation: 4G. The technology includes TD-LTE and FDD-LTE standards. Utilizing new carrier aggregation technology, the network speed is further improved on the basis of 4g network, and it is integrated into our life in a faster and more novel attitude. 4G is a combination of 3G and WLAN, and can quickly transmit data, high quality, audio, video, and images. 4G can download at speeds above 100 Mbps, which is 25 times faster than the current home broadband ADSL (4 megabytes), and can meet the requirements of almost all users for wireless services.

The difference between 4G and 3G is mainly the network speed, and the applications are basically the same. The theoretical theoretical rate of the TD-LTE network is up to 50Mbps and the maximum theoretical rate of the downlink is 100Mbps. Such as downloading 100MB video, under the 4G network environment, the fastest download time is only 8 seconds. (Calculation formula: 100MB / (100Mbps / 8) = 8s) Make the image transmission speed faster, make the quality of the transmitted image and the image look clearer.

Written by Owen