The differences between 4G network and 3G are as follows:

1. Difference in rate

(1) The downlink rate of 4G network can reach 100Mbps~150Mbps, which is 20 to 30 times higher than that of 3G, and the upload speed can reach 20Mbps~40Mbps as well. This rate can satisfy the requirements of almost all the users of wireless service.

(2) 3G networks can reach several megabits per second or even 20 megabits per second, but the network speed is slower than 4G networks.

2. Difference in compatibility

(1) 4G can use the 4G network, which is backward compatible with 3G and 2G networks.

(2) 3G network system does not support 4G network, 3G compatible 2G network.

3, the difference between the core construction technology

(1) 4G mobile communication system technology to orthogonal multi-task frequency division technology (OFDM) as the core technology. Using this technology, value-added wireless communication services can be realized, such as wireless area loop (WLL), digital audio broadcasting (DAB) and so on.

(2) 3G mobile communication system mainly takes CDMA as the core technology.

Baidu Encyclopedia-4G Networks

Baidu Encyclopedia-3g Networks