WI-FI wireless network

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In technology meaning WI-FI 6 is bunch of new network adapters, chipsets, and access points, with better comunication expiriance by user. In 2020 addition to the WiFi 'upgrade' is WiFi 6E. FCC made a historic decision to allow unlicensed broadcast over the 6GHz band. 6 GHz addresses Wi-Fi spectrum shortage by providing contiguous spectrum blocks to accommodate 14 additional 80 MHz channels and 7 additional 160 MHz channels which are needed for high-bandwidth applications that require faster data throughput such as high-definition video streaming and virtual reality. Wi-Fi 6E devices will leverage wider channels and additional capacity to deliver greater network performance. This decision almost quadruples the amount of bandwidth that's available for Wi-Fi utilization and IoT devices - 1'200MHz of spectrum in the 6GHz band available for unlicensed use. To put this into perspective, the 2.4GHz and 5GHz bands combined currently operate within about 400MHz of frequency spectrum.

Feature Wi-FI 4 Wi-FI 5 Wi-FI 6
Channel Bandwith (Mhz) 20, 40 20, 40 80, 80+80, 160 20, 40 80, 80+80, 160
Frequenc bands 2.4 GHz (and 5 GHz Optional) 5 GHz 2.4 GHz and 5 GHz
Data rate 150 Mbps 3.6 Gbps 9.6 Gbps
Type of modulation OFDM OFDM OFDMA
Modulation possibilities 64-QAM 256-QAM 1024-QAM
Spatial Streams 1 4 8
Undrlaying technology IEEE 802.11n IEEE 802.11ac IEEE 802.11ax

WiFi 4 introduced MIMO (Multiple-Input, Multiple-Output) technology, which allows multiple simultaneous transmissions, but only to one device at a time. Wi-Fi 5 built even further on the technology by introducing MU-MIMO, with the added MU standing for Multi-User and enabling multiple users to access a wireless network at the same time without interruption or throttling. WiFi 6 takes this technology one step further by enabling devices to respond to the wireless access point at the same time, a key ability missing with WiFi 5. Additionally, while WiFi 5 uses MU-MIMO to allow routers to communicate with four devices at a time, WiFi 6 uses it to allow devices to communicate with up to eight. WiFi 6 takes this technology one step further by enabling devices to respond to the wireless access point at the same time, a key ability missing with WiFi 5. Additionally, while WiFi 5 uses MU-MIMO to allow routers to communicate with four devices at a time, WiFi 6 uses it to allow devices to communicate with up to eight.

In fact, even existing Wi-Fi 5 (802.11ac) client devices can benefit from a Wi-Fi 6 (802.11ax) AP, though Wi-Fi 6 Certified devices will deliver the best results. Wi-Fi Alliance mandates that Wi-Fi 6 certified devices support WPA3 security, 1024-QAM, 160 MHz channels, and that devices support target wake time (a battery-saving tech that minimizes device check-ins).

New standard takes a bit of a departure from past Wi-Fi iterations by focusing more on improving performance in shared environments, as opposed to solely boosting peak device transfer rates. To that end, while the maximum throughput supported by Wi-Fi 6 is 2.4 Gbps, the crucial improvement of the Wi-Fi 6/802.11ax technology the standard's enhanced spectral efficiency. Among other things, the technology adds OFDMA (Orthogonal Frequency-Division Multiple Access) to allow different devices to be served by one channel, by dedicating different sub-carriers for individual client devices. Wi-Fi 6 also adds mandatory support for MU-MIMO – a feature first added in 802.11ac Wave 2 – as well as transmit beamforming for better reaching individual clients.

Wi-Fi Names and Performance
Naming Peak Performance
Name / Year IEEE
Standard
1x1
Configuration
2x2
Configuration
3x3
Configuration
Wi-Fi 4 / 2009 802.11n 150 Mbps 300 Mbps 450 Mbps
Wi-Fi 5 / 2014 802.11ac 433 Mbps over 80MHz

867 Mbs over 160MHz
867 Mbps over 80MHz

1.69 Gbps over 160MHz
1.27 Gbps over 80 MHz

2.54 Gbps over 160 MHz
Wi-Fi 6 / 2019 802.11ax 867 Mbs over 160MHz 1.69 Gbps over 160MHz 2.54 Gbps over 160 MHz

 

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  Citing of this page:
Radic, Drago. " IT - Informatics Alphabet " Split-Croatia.
{Date of access}. <https://informatics.buzdo.com/>.
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