What is the Wi-Fi6(802.11ax)? How fast it is？
Part I. What is WiFi 6?
WiFi 6 is short for the next-generation 802.11ax standard.
With the evolution of the WiFi standard, WFA chose to rename Wi-Fi with a numeric serial number to facilitate Wi-Fi users and device manufacturers to easily understand the Wi-Fi models that their devices are connected to or supported. On the other hand, the next-generation naming method is also chosen to better highlight the major advances in Wi-Fi technology. It provides a large number of new features, including increased throughput and faster speeds, and support for more concurrent connections. According to the WFA announcement, the current Wi-Fi names correspond to the following 802.11 technical standards:
|Year published||802.11 Standards||Frequency bands||Renaming|
|2009||802.11n||2.4 GHz or 5 GHz||Wi-Fi 4|
|2013||802.11ac wave1||5 GHz||
|2015||802.11ac wave2||5 GHz|
|2019||802.11ax||2.4 GHz or 5 GHz||Wi-Fi 6|
Part II. What Is the Difference Between WiFi 5 and WiFi 6?
Part III. How fast is WiFi 6?
4G is synonymous with the high speed of mobile networks. Similarly, Wi-Fi 6 is a Synonym for high-speed wireless LAN. How high speed comes from is determined by the following factors.
Machine rate = number of spatial streams*1/(Symbol+GI)*coding method*code rate*number of effective sub-carriers
(1) The number of spatial streams
The spatial flow is the antenna of the AP. The more the number of antennas, the greater the throughput of the whole machine. Just like the lanes of a highway, 8-lane will carry more traffic than four lanes.
Maximum spatial flow
Table 2 The number of spatial streams corresponding to different 802.11 standards
(2)Symbol and GI
The symbol is the transmission signal in the time domain, and a certain gap (GI) between adjacent symbols is required to avoid interference between symbols. Just like China's high-speed rail, each train is equivalent to a symbol, and there must be a time gap between two trains from the same station, otherwise, the two trains may collide. The gaps under different Wi-Fi standards are also different. Generally speaking, when the transmission speed is faster, the GI needs to be increased appropriately, just like the departure time gap between two 350KM/h high-speed trains on the same lane is larger than the 250KM/h high-speed train.
|Symbol||3.2 us||12.8 us|
|Short GI||0.4 us||/|
|GI||0.8 us||0.8 us|
(3) Coding method
The coding method is the modulation technology, that is, the number of bits that can be carried in a symbol. From Wi-Fi 1 to Wi-Fi 6, every time the modulation technology is improved, the rate of each spatial stream can be increased by at least 20%.
|Highest order modulation||64 QAM||64 QAM||256 QAM||1024 QAM|
|Number of bit /Symbol||6||6||8||10|
(4) Bit rate
Theoretically, it should be transmitted losslessly according to the encoding method, but the reality is not so rosy. Some information codes for error correction need to be added during transmission, and redundancy is exchanged for high reliability. The code rate is the ratio of the actual data code to the theoretical value after the error correction code is excluded.
(5) Number of effective sub-carriers
|Minimum Carrier Bandwidth||-||312.5 KHz||312.5 KHz||78.125KHz|
Number of valid sub-carriers
|HT160||-||2 x 234||2 x 980|
Table 6 Number of sub-carriers corresponding to 802.11 standard
At this point, we can calculate the maximum rate of a single spatial stream of 802.11ac and 802.11ax under the HT80 bandwidth:
|PHY||1/(Symbol+GI)||Number of bit /Symbol||Code rate||Effective subcarrier||Rate|
Part Ⅳ. Is WiFi 6 Worth It?
WiFi 6 is just worth it if you utilize numerous devices on your wireless network at the same time. It can also deserve it if you wish to future-proof your Wi-fi network. Nevertheless, because the technology is brand-new, it has not been developed yet, and also it can be expensive.
If you truly wish to future-proof your Wi-fi network, it might be worth it to await even more WiFi 6 devices to start presenting. And Also, WiFi 6E modern technology will certainly come out quickly that will certainly open up a brand-new "fast lane of the internet."
Part Ⅴ. WiFi 6 device recommendations
Type 1: 5G Indoor CPE
SmileMbb, a subsidiary of V-SOL, has rapidly launched 5G WiFi 6 Router products, the device adopts Qualcomm QCA6391 Wifi chipset， this chipset supports Wifi6 Technology, According to the above calculation method, in 2.4Ghz, we can calculate the maximum rate of two spatial streams of 802.11ax under HT40 bandwidth is 573.5Mbit/s. in 5Ghz, we can calculate the maximum rate of two spatial streams of 802.11ax under HT80 bandwidth is 1201Mbit/s.
Type 2: 5G NR CPE Router
XKC5551 Indoor 5G NR CPE Router aims to enable users to have the most advanced 5G experience. With this product, consumers will enjoy a higher data rate of wireless broadband than the fiber optic internet without the fetter of the cable or fiber.
Type 3: WiFi 6 Mesh Router
HG5000-5G4AX adopts WiFi6 technology which has redefined home WiFi. Experience up to 3x faster speeds, higher capacity, and reduced congestion overall compared to the previous AC WiFi5 standard.
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