IEEE 802.11ax-2021

Wi-Fi (IEEE 802.11) generationer
v
d
r
Generation	IEEE standard	Vedtaget	Forbindelses- hastigheder (Mbit/s)	Frekvens- bånd (GHz)
Wi-Fi 8	802.11bn	(2028?)	op til 100.000	2.4, 5, 6
Wi-Fi 7	802.11be	2024	1376–46120	2.4, 5, 6
Wi-Fi 6E	802.11ax	2020	574–9608	6
Wi-Fi 6	802.11ax	2019	574–9608	2.4, 5
Wi-Fi 5	802.11ac	2014	433–6933	5
Wi-Fi 4	802.11n	2008	72–600	2.4, 5
(Wi-Fi 3)*	802.11g	2003	6–54	2.4
(Wi-Fi 2)*	802.11a	1999	6–54	5
(Wi-Fi 1)*	802.11b	1999	1–11	2.4
(Wi-Fi 0)*	802.11	1997	1–2	2.4
*Wi‑Fi 0, 1, 2, and 3 er navngivet med tilbagevirkende kraft. De findes ikke i den officielle nomenklatur.

IEEE 802.11ax-2021 eller 802.11ax er en IEEE standard for trådløs lokalnet (WLANs) og efterfølgeren til 802.11ac. 802.11ax markedsføres som Wi-Fi 6 (2.4 GHz og 5 GHz) og Wi-Fi 6E (6 GHz) af Wi-Fi Alliance. 802.11ax er også kendt som High Efficiency Wi-Fi, for forbedring af Wi-Fi 6 klienter ved miljøer med mange hosts per arealenhed - fx ved større møderum og undervisningsrum. 802.11ax er designet til at operere i et licensbånd mellem 1 GHz og 7,125 GHz, inklusive de eksisterende 2,4 og 5 GHz bånd, som allerede er i anvendelse - såvel som 6 GHz båndet (5,925–7,125 GHz i USA).

Det overordnede formål med 802.11ax standarden er forbedring af kapaciteten-per-areal i ved miljøer med mange hosts per arealenhed, såsom virksomhedskontorer, indkøbscentre - og med mange små boliger. Selvom den opgivne datahastighedsforbedring i forhold til 802.11ac kun er 37%,^:qt er den overordnede datahastighedsforbedring (over et helt trådløst net) 400% (derfor tilnavnet High Efficiency).^:qt Formidlingsforsinkelsen er 75% lavere.

IEEE 802.11ax-2021 standarden blev godkendt 9. februar 2021.

Forbindelseshastigheder

Modulation og kodningsskemaer for en enkelt rum datastrøm
MCS index	Modulation type	Kodning rate	Datahastighed (i Mbit/s)
			20 MHz kanaler		40 MHz kanaler		80 MHz kanaler		160 MHz kanaler
			1600 ns GI	800 ns GI	1600 ns GI	800 ns GI	1600 ns GI	800 ns GI	1600 ns GI	800 ns GI
0	BPSK	1/2	8	8.6	16	17.2	34	36.0	68	72
1	QPSK	1/2	16	17.2	33	34.4	68	72.1	136	144
2	QPSK	3/4	24	25.8	49	51.6	102	108.1	204	216
3	16-QAM	1/2	33	34.4	65	68.8	136	144.1	272	282
4	16-QAM	3/4	49	51.6	98	103.2	204	216.2	408	432
5	64-QAM	2/3	65	68.8	130	137.6	272	288.2	544	576
6	64-QAM	3/4	73	77.4	146	154.9	306	324.4	613	649
7	64-QAM	5/6	81	86.0	163	172.1	340	360.3	681	721
8	256-QAM	3/4	98	103.2	195	206.5	408	432.4	817	865
9	256-QAM	5/6	108	114.7	217	229.4	453	480.4	907	961
10	1024-QAM	3/4	122	129.0	244	258.1	510	540.4	1021	1081
11	1024-QAM	5/6	135	143.4	271	286.8	567	600.5	1134	1201

Noter

↑ Wi-Fi 6E er industrinavnet som identificerer Wi-Fi enheder som arbejder i 6 GHz. Wi-Fi 6E tilbyder Wi-Fi 6 egenskaber og udvider dem til at omfatte 6 GHz båndet.
↑ 802.11ac specificerer kun anvendelse i 5 GHz båndet. Anvendelse i 2.4 GHz båndet er specificeret af 802.11n.
↑ Throughput-per-area, as defined by IEEE, is the ratio of the total network throughput to the network area.

↑ MCS 9 is not applicable to all combinations of channel width and spatial stream count.
↑ A second stream doubles the theoretical data rate, a third one triples it, etc.
↑ GI stands for guard interval.

Se også

Wi-Fi 7 - IEEE 802.11be

Referencer

↑ Nov 13, 2024, pcworld.com: Meet Wi-Fi 8, which will trade speed for a more reliable experience Wi-Fi 7 will remain until 2028, when Wi-Fi 8 is expected to take over, backup Citat: "...Wi-Fi 8, known right now as IEEE 802.11bn Ultra High Reliability, still remains years away...The key phrase that you should think of in the context of Wi-Fi 8? Not peak throughput, but effective throughput...According to MediaTek, the actual peak throughput in a “clean,” or laboratory, environment is just 80 percent or so of the hypothetical peak throughput, and actual, real-world results can be far less...With Wi-Fi 8, the emphasis now appears to be on improving the overall user experience first and foremost..."
↑ "MCS table (updated with 80211ax data rates)". semfionetworks.com.
↑ Kastrenakes, Jacob (2018-10-03). "Wi-Fi Now Has Version Numbers, and Wi-Fi 6 Comes Out Next Year". The Verge. Hentet 2019-05-02.
↑ Phillips, Gavin (18. januar 2021). "The Most Common Wi-Fi Standards and Types, Explained". MUO - Make Use Of. Arkiveret fra originalen 11. november 2021. Hentet 9. november 2021.
↑ "Wi-Fi Generation Numbering". ElectronicsNotes. Arkiveret fra originalen 11. november 2021. Hentet 10. november 2021.
↑ "Generational Wi-Fi® User Guide" (PDF). www.wi‑fi.org. oktober 2018. Hentet 22. marts 2021.
↑ "Wi-Fi 6E expands Wi-Fi® into 6 GHz" (PDF). www.wi‑fi.org. januar 2021. Hentet 22. marts 2021.
1 2 3 E.Khorov, A. Kiryanov, A. Lyakhov, G. Bianchi (2019). "A Tutorial on IEEE 802.11ax High Efficiency WLANs". IEEE Communications Surveys & Tutorials. IEEE. 21 (in press): 197-216. doi:10.1109/COMST.2018.2871099.{{cite journal}}: CS1-vedligeholdelse: Bruger authors parameter (link)
↑ "FCC Opens 6 GHz Band to Wi-Fi and Other Unlicensed Uses". www.fcc.gov. 24. april 2020. Arkiveret fra originalen 9. maj 2022. Hentet 23. marts 2021.
↑ Aboul-Magd, Osama (17. marts 2014). "802.11 HEW SG Proposed PAR" (DOCX). www.ieee.org. Arkiveret fra originalen 7. april 2014. Hentet 22. marts 2021.
↑ Goodwins, Rupert (3. oktober 2018). "Next-generation 802.11ax wi-fi: Dense, fast, delayed". www.zdnet.com. Hentet 23. marts 2021.
↑ "IEEE SA Standards Board Approvals - 09/10 February 2021". www.ieee.org. 9. februar 2021. Hentet 11. marts 2021.
↑ "IEEE 802.11ax-2021 - IEEE Approved Draft Standard for Information technology [...]". www.ieee.org. 9. februar 2021. Hentet 11. marts 2021.

Eksterne henvisninger

Evgeny Khorov, Anton Kiryanov, Andrey Lyakhov, Giuseppe Bianchi. 'A Tutorial on IEEE 802.11ax High Efficiency WLANs', IEEE Communications Surveys & Tutorials, vol. 21, no. 1, pp. 197-216, Firstquarter 2019. doi: 10.1109/COMST.2018.2871099.
Wi-Fi 6 Unravelled, What it is and how it works
"Are you ready for the next chapter of Wi-Fi? Meet 802.11ax" Arkiveret 19. marts 2020 hos Wayback Machine
Bellalta, Boris (2015). "IEEE 802.11ax: High-Efficiency WLANs". IEEE Wireless Communications. 23: 38-46. arXiv:1501.01496. doi:10.1109/MWC.2016.7422404. S2CID 15023432.
Fleishman, Glenn (25. april 2018). "Wi-Fi gets quicker with 802.11ax, but buying early might offer few advantages". PC World.

[only6ghz-2-3] Wi-Fi 6E er industrinavnet som identificerer Wi-Fi enheder som arbejder i 6 GHz. Wi-Fi 6E tilbyder Wi-Fi 6 egenskaber og udvider dem til at omfatte 6 GHz båndet.

[only5ghz-2-4] 802.11ac specificerer kun anvendelse i 5 GHz båndet. Anvendelse i 2.4 GHz båndet er specificeret af 802.11n.

[12] Throughput-per-area, as defined by IEEE, is the ratio of the total network throughput to the network area.

[17] MCS 9 is not applicable to all combinations of channel width and spatial stream count.

[18] A second stream doubles the theoretical data rate, a third one triples it, etc.

[19] GI stands for guard interval.

[1] Nov 13, 2024, pcworld.com: Meet Wi-Fi 8, which will trade speed for a more reliable experience Wi-Fi 7 will remain until 2028, when Wi-Fi 8 is expected to take over, backup Citat: "...Wi-Fi 8, known right now as IEEE 802.11bn Ultra High Reliability, still remains years away...The key phrase that you should think of in the context of Wi-Fi 8? Not peak throughput, but effective throughput...According to MediaTek, the actual peak throughput in a “clean,” or laboratory, environment is just 80 percent or so of the hypothetical peak throughput, and actual, real-world results can be far less...With Wi-Fi 8, the emphasis now appears to be on improving the overall user experience first and foremost..."

[2] "MCS table (updated with 80211ax data rates)". semfionetworks.com.

[5] Kastrenakes, Jacob (2018-10-03). "Wi-Fi Now Has Version Numbers, and Wi-Fi 6 Comes Out Next Year". The Verge. Hentet 2019-05-02.

[6] Phillips, Gavin (18. januar 2021). "The Most Common Wi-Fi Standards and Types, Explained". MUO - Make Use Of. Arkiveret fra originalen 11. november 2021. Hentet 9. november 2021.

[7] "Wi-Fi Generation Numbering". ElectronicsNotes. Arkiveret fra originalen 11. november 2021. Hentet 10. november 2021.

[generational-8] "Generational Wi-Fi® User Guide" (PDF). www.wi‑fi.org. oktober 2018. Hentet 22. marts 2021.

[6e-9] "Wi-Fi 6E expands Wi-Fi® into 6 GHz" (PDF). www.wi‑fi.org. januar 2021. Hentet 22. marts 2021.

[atutorial-10] 1 2 3 E.Khorov, A. Kiryanov, A. Lyakhov, G. Bianchi (2019). "A Tutorial on IEEE 802.11ax High Efficiency WLANs". IEEE Communications Surveys & Tutorials. IEEE. 21 (in press): 197-216. doi:10.1109/COMST.2018.2871099.{{cite journal}}: CS1-vedligeholdelse: Bruger authors parameter (link)

[FCC_Order_2020-04-11] "FCC Opens 6 GHz Band to Wi-Fi and Other Unlicensed Uses". www.fcc.gov. 24. april 2020. Arkiveret fra originalen 9. maj 2022. Hentet 23. marts 2021.

[PAR-13] Aboul-Magd, Osama (17. marts 2014). "802.11 HEW SG Proposed PAR" (DOCX). www.ieee.org. Arkiveret fra originalen 7. april 2014. Hentet 22. marts 2021.

[Goodwins-14] Goodwins, Rupert (3. oktober 2018). "Next-generation 802.11ax wi-fi: Dense, fast, delayed". www.zdnet.com. Hentet 23. marts 2021.

[ieeefeb-15] "IEEE SA Standards Board Approvals - 09/10 February 2021". www.ieee.org. 9. februar 2021. Hentet 11. marts 2021.

[ieeeapproval-16] "IEEE 802.11ax-2021 - IEEE Approved Draft Standard for Information technology [...]". www.ieee.org. 9. februar 2021. Hentet 11. marts 2021.