Unlicensed National Information Infrastructure

Last updated

The Unlicensed National Information Infrastructure (U-NII) [1] radio band, as defined by the United States Federal Communications Commission, is part of the radio frequency spectrum used by WLAN devices and by many wireless ISPs.

Contents

As of March 2021, U-NII consists of eight ranges. U-NII 1 through 4 are for 5 GHz WLAN (802.11a and newer), and 5 through 8 are for 6 GHz WLAN (802.11ax) use. U-NII 2 is further divided into three subsections.

U-NII bands and FCC regs
NameAliasesFreq. Range (GHz)Bandwidth (MHz)Max Power (mW)Max EIRP (mW)
U-NII-1U-NII Low / U-NII Indoor5.150–5.25010050200
U-NII-2AU-NII Mid5.250–5.3501002501,000
U-NII-2B5.350–5.470120
U-NII-2CU-NII Worldwide / U-NII-2-Extended / U-NII-2e5.470–5.7252552501,000
U-NII-3U-NII Upper5.725-5.8501251,0004,000
U-NII-4DSRC/ITS5.850–5.92575
U-NII-55.925–6.425500
U-NII-66.425–6.525100
U-NII-76.525–6.875350
U-NII-86.875–7.125250

Wireless ISPs generally use 5.725–5.825 GHz.
In the USA licensed amateur radio operators are authorized 5.650–5.925 GHz by Part 97.303 of the FCC rules.

U-NII power limits are defined by the United States CFR Title 47 (Telecommunication), Part 15 - Radio Frequency Devices, Subpart E - Unlicensed National Information Infrastructure Devices, Paragraph 15.407 - General technical requirements.

Many other countries use similar bands for Wireless communication due to a shared IEEE standard. However, regulatory use in individual countries may differ.

The defunct European HiperLAN standard operates in same frequency band as the U-NII.

5 GHz (802.11a/h/j/n/ac/ax)

Except where noted, all information taken from Annex J of IEEE 802.11-2007 modified by amendments k, y and n. Because countries set their own regulations regarding specific uses and maximum power levels within these frequency ranges, it is recommended that local authorities are consulted as regulations may change at any time.

It operates over four ranges:

In 2007, the FCC began requiring that devices operating in channels 52, 56, 60 and 64 must have Dynamic Frequency Selection (DFS) capabilities. This is to avoid communicating in the same frequency range as some radar. In 2014, the FCC issued new rules [9] for all devices due to interference with government weather radar systems. Fines and equipment seizure were listed as punishment for non-compliance.

BandChannelFrequency
(MHz)
United StatesEuropeJapanSingaporeChinaIsraelKoreaTurkeyIndiaUnited Kingdom
40/20 MHz [10] 40/20 MHz40/20 MHz [11] 10 MHz20 MHz20 MHz20 MHz [12] 20 MHz [13] 20 MHz40/20 MHz [14] 5/10 MHz [15] 80/40/20 MHz [16]
1834915NoNoNoYesNoNoNoNoNoNoYesNo
1844920NoNoYesYesNoNoNoNoNoYesYesNo
1854925NoNoNoYesNoNoNoNoNoNoYesNo
1874935NoNoNoYesNoNoNoNoNoNoYesNo
1884940NoNoYesYesNoNoNoNoNoYesYesNo
1894945NoNoNoYesNoNoNoNoNoNoYesNo
1924960NoNoYesNoNoNoNoNoNoYesYesNo
1964980NoNoYesNoNoNoNoNoNoYesYesNo
75035NoNoNoYesNoNoNoNoNoNoNoNo
85040NoNoNoYesNoNoNoNoNoNoNoNo
95045NoNoNoYesNoNoNoNoNoNoNoNo
115055NoNoNoYesNoNoNoNoNoNoNoNo
125060NoNoNoNoNoNoNoNoNoNoNoNo
165080NoNoNoNoNoNoNoNoNoNoNoNo
U-NII-1345170NoNoNoNoNoNoYesYesYesYesYesNo
365180YesYesYesNoYesNoYesYesYesYesYesYes
385190NoNoNoNoNoNoYesYesYesYesYesNo
405200YesYesYesNoYesNoYesYesYesYesYesYes
425210NoNoNoNoNoNoYesYesYesYesYesNo
445220YesYesYesNoYesNoYesYesYesYesYesYes
465230NoNoNoNoNoNoYesYesYesYesYesNo
485240YesYesYesNoNoNoYesYesYesYesYesYes
U-NII-2A525260YesYesYesNoNoNoYesNoNoNoNoYes
565280YesYesYesNoNoNoYesYesYesYesYesYes
605300YesYesYesNoNoNoYesYesYesYesYesYes
645320YesYesYesNoNoNoYesYesYesYesYesYes
U-NII-2B5350–5470NoUn­knownNo
U-NII-2C1005500Yes [17] YesYesNoNoNoNoYesNoYesYesYes
1045520Yes [17] YesYesNoNoNoNoYesNoYesYesYes
1085540Yes [17] YesYesNoNoNoNoYesNoYesYesYes
1125560Yes [17] YesYesNoNoNoNoYesNoYesYesYes
1165580Yes [17] YesYesNoNoNoNoYesNoYesYesYes
1205600No [18] YesYesNoNoNoNoYesNoYesYesYes
1245620NoYesYesNoNoNoNoYesNoYesYesYes
1285640NoYesYesNoNoNoNoYesNoYesYesYes
1325660Yes [17] YesYesNoNoNoNoNoNoNoYesYes
1365680Yes [17] YesYesNoNoNoNoNoNoYesYesYes
1405700Yes [17] YesYesNoNoNoNoNoNoNoYesYes
U-NII-31495745YesYes [7] NoNoYesYesNoYesYesYesYesYes
1535765YesYes [7] NoNoYesYesNoYesYesYesYesYes
1575785YesYes [7] NoNoYesYesNoYesYesYesYesYes
1615805YesYes [7] NoNoYesYesNoYesYesYesYesYes
1655825YesYes [7] NoNoYesYesNoYesYesYesYesYes
U-NII-4 [19] 1695845NoUn­knownNoYesNo
1735865NoUn­knownNoYesNo
1775885NoUn­knownNoYesNo
1815905NoUn­knownNoYesNo
1855925
(proposed expansion)
NoUn­knownNoYesNo
BandChannelFrequency
(MHz)
40/20 MHz40/20 MHz40/20 MHz10 MHz20 MHz20 MHz20 MHz20 MHz20 MHz40/20 MHz5/10 MHz80/40/20 MHz
United StatesEuropeJapanSingaporeChinaIsraelKoreaTurkeyIndiaUnited Kingdom

See also

References

  1. "15.07.2005, Heise: 5 GHz WLAN to be available all over Europe" www.heise.de Archived 2005-08-07 at the Wayback Machine
  2. 1 2 ""Dynamic Frequency Selection for 5 GHz WLAN in the US and Canada" www.cisco.com".
  3. 1 2 3 4 "FCC 15.407 as of October 1, 2014 - hallikainen.com". www.hallikainen.com.
  4. 1 2 3 "FCC-03-287A1.doc" (PDF).
  5. ""15E, Dynamic Frequency Selection, DFS, DFS Approval" fcc.gov".
  6. "What's New With Unlicensed National Information Infrastructure (U-NII)" (PDF).
  7. 1 2 3 4 5 6 "Tableau national de répartition des bandes de fréquences" (PDF). EU/ANFR . January 10, 2019.
  8. "Driving Wi-Fi Ahead: the Upper 5 GHz Band". 23 February 2015.
  9. "5 GHz Unlicensed Spectrum (UNII)". 12 December 2015.
  10. FCC 15.407 as of August 8, 2008 – hallikainen.com Archived July 24, 2011, at the Wayback Machine
  11. "802.11-2007 Japan MIC Released the new 5 GHz band (W56)" (PDF). Bureau Veritas — ADT. Archived from the original (PDF) on 2007-07-10. Retrieved 2008-02-23.
  12. Israel: צו הטלגרף האלחוטי (אי תחולת הפקודה) (מס' 2), התשס"ו – 2005 (PDF) (in Hebrew).
  13. Korea Frequency Distribution Table 2008.12.31 (in Korean)
  14. Gazette notification - Wireless Planning and Coordination Wing - New Delhi, the 18th October, 2018
  15. India frequency allocation table
  16. Ofcom Decision to make Wireless Telegraphy Exemption Regulations 2017
  17. 1 2 3 4 5 6 7 8 "Publication Number: 443999 Rule Parts: 15E". FCC . October 5, 2009. Devices must be professionally installed when operating in the 5470 – 5725 MHz band
  18. "Elimination of interference to Terminal Doppler Weather Radar" (PDF). FCC . July 27, 2010.
  19. "(see page 9) Sharing the 5.9 GHz Band Between Unlicensed Devices and DSRC" (PDF).