WiFi 6 VS WiFi 5，哪个更好？
Called "the next generation of WiFi", WiFi 6 has attracted the public's attention when it first occrued. What does it make WiFi 6 so different? What's the difference between WiF5 and WiFI 6?
Part I What's WiFi 6 and WiFi 5?
WiFi is a WLAN technology based on IEEE 802.11. Thus, 802.11n is also named WiFi 4. WiFi 5 and WiFi 6 also represent IEEE 802.ac and IEEE 802.ax separately. Nowadays, more and more WiFi 6 devices are occurring on the market. WiFi 6 will become mainstream in the future. But it's also a little bit difficult for some industries to transform into WiFi 6 due to technical problems. When the trouble is solved, WiFi 6 will cover everywhere in our life.
Part II 4 Difference between WiFi 6 and WiFi 5
Compared with WiFi 5, the largest transmission rate of WiFi 6 reaches 0.6 Gbps, which is 3 times larger than the rate of WiFi 5. As for the frequency, WiFi 5 only adopts 5GHz, but WiFi 6 covers 2.4/5 GHz. It's compatible with both low-speed and high-speed devices. In addition, WiFi 6 supports 1024-QAM, which is higher than the WiFi 5's 256-QAM. The higher the data capacity is, the higher the speed of data transmission will be.
Due to the new technology of MU-MIMO and OFDMA that support both upstream and downstream, WiFi 6 not only improves the rate of uploading or downloading but also optimizes the network congestion and allows more devices to connect to the wireless network. Contrastly, WiFi 5 only supports the downstream of MU-MIMO.
What's more, the spatial data flow of WiFi 6 is improved from WiFi 5's 4 to 8, suggesting that WiFi 6 can maximumly support 8 x 8 MU-MIO, which is the main reason that the rate is improved greatly.
Besides, WiFi 6 utilizes OFDMA technology, which is the evolution version of OFDM adopted by WiFi 5.
WiFi 6 adopts the WPA 3. In 2018, the WiFi organization issued the new generation of encryption protocol WPA 3, which is upgraded from the previous WPA 2. The security of WPA 3 is improved, which can prevent the brute force attack better.
4. Power consumption
WiFi 6 introduces the TWT. The technology allows the device to actively plan the communication time between the device and the wireless router, reduces the use of wireless network antennas and signal search time, which can reduce power consumption to a certain extent and increase the battery life of the device.