List of WLAN channels

WLAN (wireless local area network) channels are frequently accessed using IEEE 802.11 protocols, and equipment that does so is sold mostly under the trademark Wi-Fi. Other equipment also accesses the same channels, such as Bluetooth. The radio frequency (RF) spectrum is vital for wireless communications infrastructure.

The 802.11 standard provides several distinct radio frequency ranges for use in Wi-Fi communications: 900 MHz, 2.4 GHz, 3.6 GHz, 4.9 GHz, 5 GHz, 5.9 GHz and 60 GHz bands.[1][2][3] Each range is divided into a multitude of channels. In the standards, channels are numbered at 5 MHz spacing within a band (except in the 60 GHz band, where they are 2.16 GHz apart), and the number refers to the centre frequency of the channel. Although channels are numbered at 5 MHz spacing, transmitters generally occupy at least 20 MHz, and standards allow for channels to be bonded together to form wider channels for higher throughput. Those are also numbered by the centre frequency of the bonded group.

Countries apply their own regulations to the allowable channels, allowed users and maximum power levels within these frequency ranges. The ISM band ranges are also often used.[4]

900 MHz (802.11ah)Edit

802.11ah operates in sub-gigahertz unlicensed bands. Each world region supports different sub-bands, and the channels number depends on the starting frequency of the sub-band it belongs to. Thus, there is no global channels numbering plan, and the channels numbers are incompatible between world regions (and even between sub-bands of a same world region).

The following sub-bands are defined in the 802.11ah specifications:

Region Subband
(MHz)
Bandwidths
(MHz)
Australia 915–920 1, 2, 4
920–928 1, 2, 4, 8
China 755–779 1
779–787 1, 2, 4, 8
Europe 863–868 1, 2
Japan 916.5–927.5 1
Korea 917.5–923.5 1, 2, 4
New
Zealand
915–924 1, 2, 4, 8
924–928 1, 2, 4
Singapore 866–869 1, 2
920–925 1, 2, 4
United
States[5]
902–904 1, 2
904–920 1, 2, 4, 8, 16
920–928 1, 2, 4, 8

2.4 GHz (802.11b/g/n/ax)Edit

Fourteen channels are designated in the 2.4 GHz range, spaced 5 MHz apart from each other except for a 12 MHz space before channel 14.[6]

Channel F0 (MHz) Frequency
Range
(MHz)
North
America
[7]

Japan
[7]
Most of
world
[7][8][9][10]
[11][12][13][14]
01 2412 2401–2423 Yes Yes Yes
02 2417 2406–2428 Yes Yes Yes
03 2422 2411–2433 Yes Yes Yes
04 2427 2416–2438 Yes Yes Yes
05 2432 2421–2443 Yes Yes Yes
06 2437 2426–2448 Yes Yes Yes
07 2442 2431–2453 Yes Yes Yes
08 2447 2436–2458 Yes Yes Yes
09 2452 2441–2463 Yes Yes Yes
10 2457 2446–2468 Yes Yes Yes
11 2462 2451–2473 Yes Yes Yes
12 2467 2456–2478 NoB except CAN Yes Yes
13 2472 2461–2483 NoB Yes Yes
14 2484 2473–2495 No 11b onlyC No

Nations apply their own RF emission regulations to the allowable channels, allowed users and maximum power levels within these frequency ranges. Network operators should consult their local authorities as these regulations may be out of date as they are subject to change at any time. Most of the world will allow the first thirteen channels in the spectrum.

To guarantee no interference in any circumstances the Wi‑Fi protocol requires 16.25 to 22 MHz of channel separation (as shown below). The remaining 2 MHz gap is used as a guard band to allow sufficient attenuation along the edge of the band. This guardband is mainly used to accommodate older routers with modem chipsets prone to full channel occupancy, as most modern Wi‑Fi modems are not prone to excessive channel occupancy. In 22 MHz channel width situations, there is 3MHz free/unused spectrum between NON-overlapping channels, this is not called guard band but channel spacing.

 
Graphical representation of overlapping 20 MHz channels within the 2.4 GHz band

While overlapping frequencies can be configured at a location will usually work, it can cause interference resulting in slowdowns, sometimes severe, particularly in heavy use. Certain subsets of frequencies can be used simultaneously at any one location without interference (see diagrams for typical allocations):

Most countries Graphical representation of Wireless LAN channels in 2.4 GHz band. Note "channel 3" in the 40MHz diagram above is often labelled with the 20MHz channel numbers "1+5" or "1" with "+ Upper" or "5" with "+ Lower" in router interfaces, and "11" as "9+13" or "9" with "+ Upper" or "13" with "+ Lower"
North America Graphical representation of Wireless LAN channels in 2.4 GHz band. Note "channel 3" in the 40MHz diagram above is often labelled with the 20MHz channel numbers "1+5" or "1" with "+ Upper" or "5" with "+ Lower" in router interfaces.

However, the exact spacing required when the transmitters are not colocated depends on the protocol, the data rate selected, the distances and the electromagnetic environment where the equipment is used.[15]

The overall effect is that if there is considerable overlap between adjacent channels transmitters they will often interfere with each other. However, using every fourth or fifth channel by leaving three or four channels clear between used channels can cause less interference than sharing channels, and narrower spacing still can be used at further distances.[16][15]

3.65 GHz (802.11y)Edit

Except where noted, all information taken from Annex J of IEEE 802.11y-2008

This range is documented as only being allowed as a licensed band.

A 40 MHz band is available from 3655–3695 MHz. It may be divided into eight 5 MHz channels, four 10 MHz channels, or two 20 MHz channels, as follows:

Channel Frequency
(MHz)
North America
5 MHz 10 MHz 20 MHz
131 3657.5 Yes No No
132 3660.0 No Yes
3662.5 Yes No
133 3665.0 No Yes
No
3667.5 Yes No
134 3670.0 No Yes
3672.5 Yes No
135 3675.0 No
No No
3677.5 Yes
136 3680.0 No Yes
3682.5 Yes No
137 3685.0 No Yes
No
3687.5 Yes No
138 3690.0 No Yes
3692.5 Yes No

5.0 GHz (802.11j) WLANEdit

In Japan, 100 MHz of spectrum from 4900 MHz to 5000 MHz can be used for both indoor and outdoor connection starting from year 2002 [registration needed]. Originally, another spectrum 5030–5091 MHz was also available for use, however that have been re-purposed and cannot be use after year 2017.[17]

50 MHz of spectrum from 4940 MHz to 4990 MHz (WLAN channels 20–26) are in use by public safety entities in the United States. Within this spectrum space, there are two non-overlapping channels allocated, both with a width of 20 MHz. The most commonly used channels are 22 and 26.

5 GHz or 5.8 GHz (802.11a/h/j/n/ac/ax)Edit

Channel Center
Frequency
(MHz)
Frequency
Range
(MHz)
10
MHz
20
MHz
40
MHz
80
MHz
160
MHz
United
States
FCC
U-NII Band(s)
United
States
[18]
Canada
[19]
Europe
[20][21][22][23][24][25]
Russia
[26]
Japan
[27][28]
India
[citation needed]
Singa-
pore
[29][30]
Mainland China
[31]
Israel
[11]
Korea
[32][33]
Turkey
[34]
Australia
[12]
South Africa
[35]
Brazil
[13]
Taiwan
[36]
New
Zealand
[37]
Bahrain
[38]
Vietnam
[39]
7 5035 5030–5040 10       N/A No No No No No Unknown No No No No No No No No No No No No
8 5040 5030–5050 20       N/A No No No No No Unknown No No No No No No No No No No No No
9 5045 5040–5050 10       N/A No No No No No Unknown No No No No No No No No No No No No
11 5055 5050–5060 10       N/A No No No No No Unknown No No No No No No No No No No No No
12 5060 5050–5070 20       N/A No No No No No Unknown No No No No No No No No No No No No
16 5080 5070–5090 20       N/A No No No No No Unknown No No No No No No No No No No No No
32 5160 5150–5170 20     U-NII-1 Yes Indoors Indoors Indoors/TPC or [note 1] Indoors Yes Yes Unknown Unknown Indoors Indoors/DFS/
TPC
Indoors Unknown Unknown Yes Indoors Indoors Indoors
34 5170 5150–5190 40     U-NII-1 Yes Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes No Indoors Indoors Indoors/DFS/
TPC
Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors Indoors
36 5180 5170–5190 20 U-NII-1 Yes Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors Indoors
38 5190 5170–5210 40 U-NII-1 Yes Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes No Indoors Indoors Indoors/DFS/
TPC
Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors Indoors
40 5200 5190–5210 20 U-NII-1 Yes Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors Indoors
42 5210 5170–5250 80 U-NII-1 Yes Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes No No Indoors Indoors/DFS/
TPC
Indoors No No Yes Indoors Indoors Indoors
44 5220 5210–5230 20 U-NII-1 Yes Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors Indoors
46 5230 5210–5250 40 U-NII-1 Yes Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes No Indoors Indoors and [note 2] Indoors/DFS/
TPC
Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors Indoors
48 5240 5230–5250 20 U-NII-1 Yes Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes Yes Indoors Indoors and [note 2] Indoors/DFS/
TPC
Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors Indoors
50 5250 5170–5330 160 U-NII-1 and U-NII-2A DFS/TPC or [note 3] DFS/TPC or [note 3] Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC or [note 1] No No Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/DFS/
TPC or[note 1]
No No DFS DFS/TPC or [note 1] Indoors/DFS/
TPC or[note 1]
DFS/TPC
52 5260 5250–5270 20 U-NII-2A DFS/TPC or [note 3] DFS/TPC or [note 3] Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC or [note 1] DFS/TPC Indoors/DFS/
TPC or[note 1]
DFS/TPC Indoors/DFS/
TPC
Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC or [note 1] Indoors/DFS/
TPC or[note 1]
DFS/TPC
54 5270 5250–5290 40 U-NII-2A DFS/TPC or [note 3] DFS/TPC or [note 3] Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC or [note 1] No Indoors DFS/TPC Indoors/DFS/
TPC
Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC or [note 1] Indoors/DFS/
TPC or[note 1]
DFS/TPC
56 5280 5270–5290 20 U-NII-2A DFS/TPC or [note 3] DFS/TPC or [note 3] Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC or [note 1] DFS/TPC Indoors/DFS/
TPC or[note 1]
DFS/TPC Indoors/DFS/
TPC
Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC or [note 1] Indoors/DFS/
TPC or[note 1]
DFS/TPC
58 5290 5250–5330 80 U-NII-2A DFS/TPC or [note 3] DFS/TPC or [note 3] Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC or [note 1] No No DFS/TPC Indoors/DFS/
TPC
Indoors/DFS/
TPC or[note 1]
No No DFS DFS/TPC or [note 1] Indoors/DFS/
TPC or[note 1]
DFS/TPC
60 5300 5290–5310 20 U-NII-2A DFS/TPC or [note 3] DFS/TPC or [note 3] Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC or [note 1] DFS/TPC Indoors/DFS/
TPC or[note 1]
DFS/TPC Indoors/DFS/
TPC
Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC or [note 1] Indoors/DFS/
TPC or[note 1]
DFS/TPC
62 5310 5290–5330 40 U-NII-2A DFS/TPC or [note 3] DFS/TPC or [note 3] Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC or [note 1] No Indoors DFS/TPC Indoors/DFS/
TPC
Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC or [note 1] Indoors/DFS/
TPC or[note 1]
DFS/TPC
64 5320 5310–5330 20 U-NII-2A DFS/TPC or [note 3] DFS/TPC or [note 3] Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC or [note 1] DFS/TPC Indoors/DFS/
TPC or[note 1]
DFS/TPC Indoors/DFS/
TPC
Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC or [note 1] Indoors/DFS/
TPC or[note 1]
DFS/TPC
68 5340 5330–5350 20       U-NII-2A DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Yes DFS/TPC or [note 1] Unknown Unknown DFS/TPC Indoors/DFS/
TPC
Indoors/DFS/
TPC or[note 1]
Unknown Unknown DFS DFS/TPC or [note 1] Indoors/DFS/
TPC or[note 1]
DFS/TPC
96 5480 5470–5490 20       U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] DFS/TPC No DFS/TPC Yes DFS/TPC Unknown Unknown DFS/TPC DFS/TPC DFS/TPC or [note 3] Unknown Unknown DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
100 5500 5490–5510 20 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC No DFS/TPC Yes DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
102 5510 5490–5530 40 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
104 5520 5510–5530 20 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
106 5530 5490–5570 80 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] No No DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
108 5540 5530–5550 20 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
110 5550 5530–5570 40 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
112 5560 5550–5570 20 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
114 5570 5490–5650 160 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] No No DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
116 5580 5570–5590 20 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
118 5590 5570–5610 40 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
120 5600 5590–5610 20 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
122 5610 5570–5650 80 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] No No DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
124 5620 5610–5630 20 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
126 5630 5610–5650 40 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
128 5640 5630–5650 20 U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3][citation needed] DFS/TPC No DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
132 5660 5650–5670 20   U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
134 5670 5650–5690 40   U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
136 5680 5670–5690 20   U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
138 5690 5650–5730 80   U-NII-2C and U-NII-3 DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC
+ SRD (25 mW)
Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No DFS/TPC No DFS/TPC or [note 3] No No DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
140 5700 5690–5710 20   U-NII-2C DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No DFS/TPC DFS/TPC DFS/TPC or [note 3] Yes DFS DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
142 5710 5690–5730 40   U-NII-2C and U-NII-3 DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC
+ SRD (25 mW)
Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No DFS/TPC No DFS/TPC or [note 3] No No DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
144 5720 5710–5730 20   U-NII-2C and U-NII-3 DFS/TPC or [note 3] DFS/TPC or [note 3] DFS/TPC
+ SRD (25 mW)
Indoors/TPC or [note 1] DFS/TPC Indoors DFS/TPC No No DFS/TPC No DFS/TPC or [note 3] No No DFS DFS/TPC or [note 3] No DFS/TPC or [note 3]
149 5745 5735–5755 20   U-NII-3 Yes Yes SRD (25 mW)[40] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Fixed
Yes
151 5755 5735–5775 40   U-NII-3 Yes Yes SRD (25 mW)[40] Indoors/TPC or [note 1] No Indoors Yes No No Yes No Yes No Yes Yes Yes DFS/TPC/
Fixed
Yes
153 5765 5755–5775 20   U-NII-3 Yes Yes SRD (25 mW)[40] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Fixed
Yes
155 5775 5735–5815 80   U-NII-3 Yes Yes SRD (25 mW)[40] Indoors/TPC or [note 1] No Indoors Yes No No Yes No Yes No No Yes Yes DFS/TPC/
Fixed
Yes
157 5785 5775–5795 20   U-NII-3 Yes Yes SRD (25 mW)[40] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Fixed
Yes
159 5795 5775–5815 40   U-NII-3 Yes Yes SRD (25 mW)[40] Indoors/TPC or [note 1] No Indoors Yes No No Yes No Yes No Yes Yes Yes DFS/TPC/
Fixed
Yes
161 5805 5795–5815 20   U-NII-3 Yes Yes SRD (25 mW)[40] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Fixed
Yes
165 5825 5815–5835 20       U-NII-3 Yes Yes SRD (25 mW)[40] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Fixed
Yes
169 5845 5835–5855 20       N/A No No SRD (25 mW)[40] No No Yes No No No No No No No No No No No No
173 5865 5855–5875 20       N/A No No SRD (25 mW)[40] No No Yes No No No No No No No No No No No No
183 4915 4910–4920 10       N/A No No No No registration needed Unknown No No No No No No No No No No No No
184 4920 4910–4930 20       N/A No No No No registration needed Unknown No No No No No No No No No No No No
185 4925 4920–4930 10       N/A No No No No registration needed Unknown No No No No No No No No No No No No
187 4935 4930–4940 10       N/A No No No No registration needed Unknown No No No No No No No No No No No No
188 4940 4930–4950 20       N/A No No No No registration needed Unknown No No No No No No No No No No No No
189 4945 4940–4950 10       N/A No No No No registration needed Unknown No No No No No No No No No No No No
192 4960 4950–4970 20       N/A No No No No registration needed Unknown No No No No No No No No No No No No
196 4980 4970–4990 20       N/A No No No No registration needed Unknown No No No No No No No No No No No No
Channel Center
Frequency
(MHz)
Frequency
Range
(MHz)
10
MHz
20
MHz
40
MHz
80
MHz
160
MHz
United States
FCC
U-NII Band(s)
United States Canada Europe Russia Japan India Singapore Mainland China Israel Korea Turkey Australia South Africa Brazil Taiwan New Zealand Bahrain Vietnam
Notes:
  1. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu limited to 100 mW instead of 200 mW without TPC
  2. ^ a b limited to power density of 2.5mW/MHz
  3. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu bv bw bx by bz ca cb cc cd ce cf cg ch ci cj ck cl cm cn co cp cq cr cs ct cu cv cw cx cy cz da db dc dd de df dg dh di dj dk dl dm dn do dp dq dr ds dt du dv dw dx dy dz ea eb ec limited to 500 mW instead of 1 W without TPC
Caption
Text Meaning
Yes MAY be used without restrictions.
No SHOULD NOT be used.
Indoors MUST be used indoor only.
DFS MUST be used with DFS regardless indoor or outdoor.
SRD MUST comply with SRD requirements regardless indoor or outdoor.
Indoors/DFS MUST be used with DFS and indoor only.
Indoors/TPC MUST be used with TPC and indoor only.
DFS/TPC MUST be used with DFS and TPC.
DFS/TPC + SRD MUST be used with DFS, TPC and comply with SRD requirements.
Indoors/DFS/TPC MUST be used with DFS, TPC and indoor only.
registration needed MUST be used only after registration.
Unknown Information not available or defined.
Notes: RFC 2119, RFC 854

United StatesEdit

Source:[41]

In 2007, the FCC (United States) began requiring that devices operating in the bands of 5.250–5.350 GHz and 5.470–5.725 GHz must employ dynamic frequency selection (DFS) and transmit power control (TPC) capabilities. This is to avoid interference with weather-radar and military applications.[42] In 2010, the FCC further clarified the use of channels in the 5.470–5.725 GHz band to avoid interference with TDWR, a type of weather radar system.[43] In FCC parlance, these restrictions are now referred to collectively as the "Old Rules". On 10 June 2015, the FCC approved a "new" ruleset for 5 GHz device operation (called the "New Rules"), which adds 160 and 80 MHz channel identifiers, and re-enables previously prohibited DFS channels, in Publication Number 905462.[44] This FCC publication eliminates the ability for manufacturers to have devices approved or modified under the Old Rules in phases; the New Rules apply in all circumstances as of 2 June 2016.[44]

GermanyEdit

Germany requires DFS and TPC capabilities on 5.250–5.350 GHz and 5.470–5.725 GHz as well; in addition, the frequency range 5.150–5.350 GHz is allowed only for indoor use, leaving only 5.470–5.725 GHz for outdoor and indoor use.[45]

Since this is the German implementation of EU Rule 2005/513/EC, similar regulations must be expected throughout the European Union.[46][47]

European standard EN 301 893 covers 5.15–5.725 GHz operation, and as of 23 May 2017 v2.1.1 has been adopted.[48]

AustriaEdit

Austria adopted Decision 2005/513/EC directly into national law.[49] The same restrictions as in Germany apply, only 5.470–5.725 GHz is allowed to be used outdoor and indoor.

South AfricaEdit

Source for South Africa: [35]

JapanEdit

Japan's use of 10 and 20 MHz-wide 5 GHz wireless channels is codified by Association of Radio Industries and Businesses (ARIB) document STD-T71, Broadband Mobile Access Communication System (CSMA).[50] Additional rule specifications relating to 40, 80, and 160 MHz channel allocation has been taken on by Japan's Ministry of Internal Affairs and Communications (MIC).[51]

BrazilEdit

In Brazil, the TPC use in 5.150–5.725 GHz band is optional. DFS is required only in the 5.470–5.725 GHz band.[52]

AustraliaEdit

As of 2015, some of the Australian channels require DFS to be utilised (a significant change from the 2000 regulations, which allowed lower power operation without DFS).[12] As per AS/NZS 4268 B1 and B2, transmitters designed to operate in any part of 5250–5350 GHz and 5470–5725 GHz bands shall implement DFS in accordance with sections 4.7 and 5.3.8 and Annex D of ETSI EN 301 893 or alternatively in accordance with FCC paragraph 15.407(h)(2). Also as per AS/NZS 4268 B3 and B4, transmitters designed to operate in any part of 5250–5350 MHz and 5470–5725 MHz bands shall implement TPC in accordance with sections 4.4 and 5.3.4 of ETSI EN 301 893 or alternatively in accordance with FCC paragraph 15.407(h)(1).

New ZealandEdit

New Zealand regulation differs from Australian.[53]

SingaporeEdit

Singapore regulatory – IMDA requires DFS and TPC capabilities on 5.250–5.350 GHz above 100 mW EIRP and below or equal to 200 mW EIRP, requires DFS capability on 5.250–5.350 GHz below or equal to 100 mW EIRP, and requires DFS and TPC capabilities on 5.470–5.725 below or equal to 1000mW EIRP. Operating 5.725–5.850 GHz above 1000mW and below or equal to 4000mW EIRP shall be approved on exceptional basis.[30]

South KoreaEdit

In Korea, Ministry of Science and ICT has public notices. 신고하지 아니하고 개설할 수 있는 무선국용 무선설비의 기술기준, Technical standard for radio equipment for radio stations that can be opened without reporting. They allowed 160MHz channel bandwidth from 2018-6-27. [54]

ChinaEdit

China MIIT expanded allowed channels as of 31 December 2012 to add UNII-1, 5150–5250 GHz, UNII-2, 5250–5350 GHz (DFS/TPC), similar to European standards EN 301.893 V1.7.1.[55]

5.9 GHz (802.11p)Edit

The 802.11p amendment published on 15 July 2010, specifies WLAN in the licensed band of 5.9 GHz (5.850–5.925 GHz).

6 GHz (802.11ax)Edit

United States[56]Edit

On 23 April 2020, the FCC voted on and ratified a Report and Order[57] to allocate 1.2 GHz of unlicensed spectrum in the 6GHz band (5.925-7.125 GHz) for Wi-Fi use.

The Wi-Fi Alliance has introduced the term "Wi-Fi 6E" to identify and certify Wi-Fi devices that support this new band. Channel numbers will be defined by the IEEE's 802.11ax task group.

Low-Power Indoor (LPI) OperationEdit

USA 6GHz Low Power Indoor Channels
Band 20MHz 40MHz 80MHz 160MHz
[U-NII]-5 24 12 6 3
U-NII-6 5 2.5 1.25 0.5
U-NII-7 17.5 8.75 4.25 2.25
U-NII-8 12.5 5.75 2.5 1.25
TOTAL 59 29 14 7

Note: Partial channels indicate channels that span UNII boundaries, which is permitted in 6GHz LPI operation). Under the proposed channel numbers, the U-NII-7/U-NII-8 boundary is spanned by channels 185 (20MHZ), 187 (40MHz), 183 (80MHz), and 175 (160MHz). The U-NII-6/U-NII-7 boundary is spanned by channels 115 (40MHz), 119 (80MHz), and channel 111 (160MHz).

For use in indoor environments, access points are limited to a maximum EIRP of 30dBm and a maximum Power Spectral Density of 5dBm/MHz. They can operate in this mode on all four U-NII bands (5,6,7,8) without the use of automatic frequency coordination. These types of access points are not permitted to be connectorized for external antennas.

Standard PowerEdit

USA 6GHz Standard Power Channels
Band 20MHz 40MHz 80MHz 160MHz
U-NII-5 24 12 6 3
U-NII-6 Not allowed
U-NII-7 17 8 3 1
U-NII-8 Not Allowed
TOTAL 41 20 9 4

Standard power access points are permitted indoors and outdoors at a maximum EIRP of 36dBm in the U-NII-5 and U-NII-7 sub-bands with automatic frequency coordination (AFC).

Very Low Power DevicesEdit

The FCC will issue a ruling in the future on a third class of very low power devices such as hotspots and short-range applications.

Client DevicesEdit

Clients are limited to 6dBm below the power of the access point.

EuropeEdit

The European Commission is expected to rule on 6GHz in early 2021. It is currently expected that EU regulations will permit operation only in the band from 5925-6425MHz (corresponding to the US U-NII-5 band) by Low Power Indoor and Very Low Power devices. [58]

EU 6GHz Channels
Band 20MHz 40MHz 80MHz 160MHz
5925-6425MHz 24 12 6 3

United KingdomEdit

The UK's OFCOM is expected to generally mirror EU regulations.[59]

60 GHz (802.11ad/ay)Edit

The 802.11ad/ay, also known as WiGig. This operates in the 60 GHz V band ISM band.

Channel Center (GHz) Min. (GHz) Max. (GHz) BW (GHz)
1 58.32 57.24 59.40 2.16
2 60.48 59.40 61.56
3 62.64 61.56 63.72
4 64.80 63.72 65.88
5 66.96 65.88 68.04
6 69.12 68.04 70.20

See alsoEdit

NotesEdit

^B In the US, 802.11 operation on channels 12 and 13 is allowed under low power conditions. The 2.4 GHz Part 15 band in the US allows spread-spectrum operation as long as the 50 dB bandwidth of the signal is within the range of 2,400–2,483.5 MHz[60] which fully encompasses both channels 12 and 13. A Federal Communications Commission (FCC) document clarifies that only channel 14 is forbidden and that low-power transmitters with low-gain antennas may operate legally in channels 12 and 13.[61] Channels 12 and 13, however, are not normally used in order to avoid any potential interference in the adjacent restricted frequency band, 2,483.5–2,500 MHz,[62] which is subject to strict emission limits set out in 47 CFR § 15.205.[63] Per recent FCC Order 16-181, "an authorized access point device can only operate in the 2483.5–2495 MHz band when it is operating under the control of a Globalstar Network Operating Center and that a client device can only operate in the 2483.5–2495 MHz band when it is operating under the control of an authorized access point"[64]

In Canada, 12 channels are available for use, 11 of which at full power and the other (channel 12) is transmit power limited. Few devices, however, have a method to enable a lower powered channel 12.[citation needed]

^C Channel 14 is valid only for DSSS and CCK modes (Clause 18 a.k.a. 802.11b) in Japan. OFDM (i.e., 802.11g) may not be used. (IEEE 802.11-2007 §19.4.2)

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Further readingEdit