U-NII

Last updated

The Unlicensed National Information Infrastructure (U-NII) [1] [2] radio band is part of the radio frequency spectrum used by IEEE 802.11a devices and by many wireless ISPs. It operates over four ranges:

Contents

BandFreq. RangeBandwidthMax PowerMax EIRP
U-NII Low / U-NII-1 / U-NII Indoor5.150–5.250 GHz100 MHz50 mW200 W
U-NII Mid / U-NII-2A5.250–5.350 GHz100 MHz250 mW1 W
U-NII-2B5.350–5.470 GHz120 MHz..
U-NII Worldwide / U-NII-2C / U-NII-2-Extended / U-NII-2e5.470–5.725 GHz255 MHz..
U-NII Upper / U-NII-35.725-5.850 GHz125 MHz1 W200 W
DSRC/ITS / U-NII-45.850–5.925 GHz  75 MHz..

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 is an FCC regulatory domain for 5- GHz wireless devices. 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. Regulatory use in individual countries may differ.

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

5 GHz (802.11a/h/j/n)

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.

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 StatesEuropeJapanSingaporeChinaIsraelKoreaTurkeyIndia
40/20 MHz [10] 40/20 MHz40/20 MHz [11] 10 MHz20 MHz20 MHz20 MHz [12] 20 MHz [13] 20 MHz40/20 MHz5/10 MHz [14]
1834915NoNoNoYesNoNoNoNoNoNoYes
1844920NoNoYesYesNoNoNoNoNoYesYes
1854925NoNoNoYesNoNoNoNoNoNoYes
1874935NoNoNoYesNoNoNoNoNoNoYes
1884940NoNoYesYesNoNoNoNoNoYesYes
1894945NoNoNoYesNoNoNoNoNoNoYes
1924960NoNoYesNoNoNoNoNoNoYesYes
1964980NoNoYesNoNoNoNoNoNoYesYes
75035NoNoNoYesNoNoNoNoNoNoNo
85040NoNoNoYesNoNoNoNoNoNoNo
95045NoNoNoYesNoNoNoNoNoNoNo
115055NoNoNoYesNoNoNoNoNoNoNo
125060NoNoNoNoNoNoNoNoNoNoNo
165080NoNoNoNoNoNoNoNoNoNoNo
U-NII-1345170NoNoNoNoNoNoYesYesYesYesYes
365180YesYesYesNoYesNoYesYesYesYesYes
385190NoNoNoNoNoNoYesYesYesYesYes
405200YesYesYesNoYesNoYesYesYesYesYes
425210NoNoNoNoNoNoYesYesYesYesYes
445220YesYesYesNoYesNoYesYesYesYesYes
465230NoNoNoNoNoNoYesYesYesYesYes
485240YesYesYesNoNoNoYesYesYesYesYes
U-NII-2A525260YesYesYesNoNoNoYesNoNoNoNo
565280YesYesYesNoNoNoYesYesYesYesYes
605300YesYesYesNoNoNoYesYesYesYesYes
645320YesYesYesNoNoNoYesYesYesYesYes
U-NII-2B5350–5470NoUnknown
U-NII-2C1005500Yes [15] YesYesNoNoNoNoYesNoYesYes
1045520Yes [15] YesYesNoNoNoNoYesNoYesYes
1085540Yes [15] YesYesNoNoNoNoYesNoYesYes
1125560Yes [15] YesYesNoNoNoNoYesNoYesYes
1165580Yes [15] YesYesNoNoNoNoYesNoYesYes
1205600No [16] YesYesNoNoNoNoYesNoYesYes
1245620NoYesYesNoNoNoNoYesNoYesYes
1285640NoYesYesNoNoNoNoYesNoYesYes
1325660Yes [15] YesYesNoNoNoNoNoNoNoYes
1365680Yes [15] YesYesNoNoNoNoNoNoYesYes
1405700Yes [15] YesYesNoNoNoNoNoNoNoYes
U-NII-31495745YesNoNoNoYesYesNoYesYesYesYes
1535765YesNoNoNoYesYesNoYesYesYesYes
1575785YesNoNoNoYesYesNoYesYesYesYes
1615805YesNoNoNoYesYesNoYesYesYesYes
1655825YesNoNoNoYesYesNoYesYesYesYes
U-NII-4 [17] 1695845NoUnknownNoYes
1735865NoUnknownNoYes
1775885NoUnknownNoYes
1815905NoUnknownNoYes
1855925
(proposed expansion)
NoUnknownNoYes

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. ""Cisco: Glossary" www.cisco.com".
  3. 1 2 ""Dynamic Frequency Selection for 5 GHz WLAN in the US and Canada" www.cisco.com".
  4. 1 2 3 4 "FCC 15.407 as of October 1, 2014 - hallikainen.com". www.hallikainen.com.
  5. 1 2 3 "FCC-03-287A1.doc" (PDF).
  6. ""15E, Dynamic Frequency Selection, DFS, DFS Approval" fcc.gov".
  7. ""What's New With Unlicensed National Information Infrastructure (U-NII)"" (PDF).
  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. India frequency allocation table
  15. 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
  16. "Elimination of interference to Terminal Doppler Weather Radar" (PDF). FCC . July 27, 2010.
  17. ""(see page 9) Sharing the 5.9 GHz Band Between Unlicensed Devices and DSRC"" (PDF).