Wifi 6 (802.11ax) VS wifi 5 (802.11ac)? What Is Wifi 6

By 2020-05-25

WiFi 6 (802.11ax=WiFi 6) has faster speed, lower latency, larger capacity, safer and more power saving.

WiFi 6 and phone

Compared with Wifi 5, what are the advantages of Wifi 6?

What is wifi 6

WiFi 6, referring to the sixth-generation wireless network technology, is a wireless local area network technology created by the Wi-Fi Alliance in the IEEE 802.11 standard.

At the end of 2018, the WiFi Alliance announced that it would change the naming method of the WiFi standard and would no longer adopt the 802.11 electronic engineering terminology. Instead, the latest 802.11ax standard would be simplified and named as WiFi 6.

List of naming conventions for WiFi 1 to WiFi 6:
802.11ax = WiFi 5
802.11ac = WiFi 5
802.11n = WiFi 4
802.11g = WiFi 3
802.11a = WiFi 2
802.11b = WiFi 1

Compared with previous generations of WiFi technology, the new generation of WiFi6 is mainly characterized by faster speed, lower latency, larger capacity, more security, and more power saving.

WiFi 6 is faster

The maximum transmission rate of WiFi 6 has been increased to 9.6Gbps (802.11ac WiFi 5 is 3.5Gbps), and the theoretical speed has been increased by nearly 3 times. Of course, this rate is only the theoretical maximum, it is difficult to reach 9.6Gbps in daily life.

In terms of frequency band: WiFi 5 only involves 5GHz, while WiFi 6 covers 2.4 / 5GHz, covering low-speed and high-speed equipment completely;

In terms of modulation mode: WiFi 6 supports 1024-QAM, which is higher than 256-QAM of WiFi 5, and the higher data capacity means higher data transmission speed;

WiFi 6 has lower latency

WiFi 6 greatly improves network congestion, allows more devices to connect to the wireless network, and has a consistent high-speed connection experience, and this is mainly due to the support of both upstream and downstream MU-MIMO and OFDMA new technologies.

OFDMA (Orthogonal Frequency Division Multiple Access) technology, which is an evolved version of the OFDM technology used in WiFi 5, combines OFDM and FDMA technology, and uses OFDM to parent the channel and load transmission data on some subcarriers Transmission technology.

At the same time, WiFi 6 improves the transmission time of each signal carrier from 3.2μs of WiFi 5 to 12.8μs through a better Long DFDM Symbol transmission mechanism, effectively reducing the packet loss rate and retransmission rate, and making the transmission more stable.

WiFi 6 has more capacity

WiFi 6 also introduces the BSS Coloring coloring mechanism, labeling each device connected to the network, and adding corresponding labels to its data. When transmitting data, there is a corresponding address, which can be transmitted directly without confusion.
The multi-user MU-MIMO technology allows the computer network to share channels with multiple terminals at the same time, enabling multiple mobile phones / computers to access the Internet at the same time, from the previously inefficient queuing sequence through method to a "simultaneous" efficient method. Combined with OFDMA technology, each channel under the WiFi6 network can perform high-efficiency data transmission, improve the network experience in a multi-user scenario, can better meet the WiFi hotspot area, multi-user use, and is not easy to freeze, the capacity is more Big.

WiFi 6 is more secure

If WiFi 6 devices (wireless routers) need to pass the WiFi Alliance certification, they must use the WPA 3 security protocol.

WPA 3 is the beginning of 2018. The WiFi Alliance released a new generation of WiFi encryption protocol WPA 3, which is an upgraded version of the widely used WPA 2 protocol. The security is further improved, which can better prevent brute force attacks and brute force cracking.

WiFi 6 saves more power

WiFi 6 introduces the TARget Wake Time (TWT) technology, which allows the device and the wireless router to actively plan communication time, reduce the use of wireless network antennas and signal search time, which means that it can reduce power consumption to a certain extent and improve device life time.

However, for mobile phones, laptops, tablets and other devices, the power saving effect is not obvious. But for smart homes, especially wireless devices that use lithium batteries, this technology can greatly improve their battery life.

Keywords: Wifi 6 wifi 5
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