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Wi-Fi 6, or IEEE 802.11ax, is an IEEE standard from the Wi-Fi Alliance, for wireless networks . It operates in the 2.4 GHz and 5 GHz bands, [9] with an extended version, Wi-Fi 6E, that adds the 6 GHz band. [10] It is an upgrade from Wi-Fi 5 , with improvements for better performance in crowded places.
Contention in a wireless or noisy spectrum, where the physical medium is entirely out of the control of those who specify the protocol, requires measures that also use up throughput. Wireless devices, BPL , and modems may produce a higher line rate or gross bit rate , due to error-correcting codes and other physical layer overhead.
Different versions of Wi-Fi use different techniques, 802.11b uses direct-sequence spread spectrum on a single carrier, whereas 802.11a, Wi-Fi 4, 5 and 6 use orthogonal frequency-division multiplexing. [86] [87] Channels are used half duplex [88] [89] and can be time-shared by multiple networks. Any packet sent by one computer is locally ...
These systems are used to provide wireless access to other systems on the local network such as other computers, shared printers, and other such devices or even the internet. Typically a WLAN offers much better speeds and delays within the local network than an average consumer's Internet access .
802.11a: 1999 6–54 5 (Wi-Fi 3*) 802.11g: 2003 2.4 Wi-Fi 4: 802.11n: 2009 6.5–600 2.4, 5 Wi-Fi 5: 802.11ac: 2013 6.5–6933 5 [a] Wi-Fi 6: 802.11ax: 2021 0.4–9608 [1] 2.4, 5 Wi-Fi 6E: 2.4, 5, 6 [b] Wi-Fi 7: 802.11be: 2024 [c] 0.4– 23,059: 2.4, 5, 6 [2] Wi-Fi 8: 802.11bn: exp. 2028 [3] 100,000 [4] 2.4, 5, 6 [5] *Wi‑Fi 0, 1, 2, and 3 are ...
This Linksys WRT54GS, a combined router and Wi‑Fi access point, operates using the 802.11g standard in the 2.4 GHz ISM band using signalling rates up to 54 Mbit/s. IEEE 802.11 Wi-fi networks are the most widely used wireless networks in the world, connecting devices like laptops (left) to the internet through a wireless router (right).
The Wi-Fi Alliance separated the introduction of 802.11ac wireless products into two phases ("waves"), named "Wave 1" and "Wave 2". [ 14 ] [ 15 ] From mid-2013, the alliance started certifying Wave 1 802.11ac products shipped by manufacturers, based on the IEEE 802.11ac Draft 3.0 (the IEEE standard was not finalized until later that year). [ 16 ]
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.