List of WLAN channels

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Wireless local area network channels are frequently accessed using IEEE 802.11 protocols and are sold mostly under the trademark WiFi. Other equipment also accesses the same channels, such as Bluetooth. The radio frequency (RF) spectrum is vital for wireless communications infrastructure. Most operations on the RF spectrum require a license provided by a national regulatory body or the government.

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.

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]

Network operators should consult their local authorities as these regulations may be out of date as they are subject to change at any time..

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.[5]

Channel F0 (MHz) North
America
[6]

Japan
[6]
Most of
world[6][7][8][9]
[10][11][12][13]
01 2412 Yes Yes Yes
02 2417 Yes Yes Yes
03 2422 Yes Yes Yes
04 2427 Yes Yes Yes
05 2432 Yes Yes Yes
06 2437 Yes Yes Yes
07 2442 Yes Yes Yes
08 2447 Yes Yes Yes
09 2452 Yes Yes Yes
10 2457 Yes Yes Yes
11 2462 Yes Yes Yes
12 2467 NoB except CAN Yes Yes
13 2472 NoB Yes Yes
14 2484 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 Network operators should consult their local authorities as these regulations may be out of date as they are subject to change at any time.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 channels. This guardband is mainly used to accommodate older routers with modem chipsets prone to full channel occupancy, as most modern WiFi modems are not prone to excessive channel occupancy.

Graphical representation of 2.4 GHz band channels overlaps with 20 MHz transmitters.

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):

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.[14]

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.[15][14]

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:

Chan-
nel
Fre-
quency
(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

4.9–5.0 GHz (802.11j) WLAN[edit]

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.[16]l

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 (802.11a/h/j/n/ac/ax)[edit]

Source:[17]

In 2007, the FCC (United States) began requiring that devices operating on 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.[18] In 2010, the FCC further clarified the use of channels in the 5.470–5.725 GHz band to avoid interference with TDWR weather radar systems.[19] 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.[20] 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.[20]

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.[21]

Since this is the German implementation of EU Rule 2005/513/EC, similar regulations must be expected throughout the European Union.[22][23]

European standard EN 301 893 covers 5.15–5.725 GHz operation, and as of 23 May 2017 v2.1.1 has been adopted.[24]

Austria adopted Decision 2005/513/EC directly into national law.[25] The same restrictions as in Germany apply, only 5.470–5.725 GHz is allowed to be used outdoor and indoor.

Source for South Africa: [26]

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).[27] 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).[28]

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.[29]

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).[11] 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 Zealand regulation differs from Australian.[30]

Singapore regulatory – IMDA requires DFS and TPC capabilities on 5.250–5.350 GHz above 100 mW (e.i.r.p.) and below or equal to 200 mW (e.i.r.p.), requires DFS capability on 5.250–5.350 GHz below or equal to 100 mW (e.i.r.p.), and requires DFS and TPC capabilities on 5.470–5.725 below or equal to 1000mW (e.i.r.p.). Operating 5.725–5.850 GHz above 1000mW and below or equal to 4000mW (e.i.r.p) shall be approved on exceptional basis.[31]

Chan-
nel
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
[32][33]
Canada
[34]
Europe
[35][36][37][38][39][40]
Switzerland
[41][42][43]
Russia
[44]
Japan[45] India Singa-
pore
[46][31]
China
[47]
Israel
[10]
Korea
[48]
Turkey
[49]
Australia
[11]
South Africa
[26]
Brazil
[12]
Taiwan
[50]
New
Zealand
[30][51]
Bahrain
[52]
7 5035 5030–5040 10 No No No N/A No No No No No No Unknown No No No No No No No No No No No
8 5040 5030–5050 20 No No No N/A No No No No No No Unknown No No No No No No No No No No No
9 5045 5040–5050 10 No No No N/A No No No No No No Unknown No No No No No No No No No No No
11 5055 5050–5060 10 No No No N/A No No No No No No Unknown No No No No No No No No No No No
12 5060 5050–5070 20 No No No N/A No No No No No No Unknown No No No No No No No No No No No
16 5080 5070–5090 20 No No No N/A No No No No No No Unknown No No No No No No No No No No No
32 5160 5150–5170 20 No No U-NII-1 Unknown Unknown Indoors Indoors Indoors/TPC or [note 1] Unknown Yes Yes Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Indoors
34 5170 5150–5190 40 No No U-NII-1 No No Indoors Indoors Indoors/TPC or [note 1] No Indoors Yes No Indoors Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors
36 5180 5170–5190 20 U-NII-1 Yes Indoors Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes Yes Indoors Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors
38 5190 5170–5210 40 U-NII-1 Yes Indoors Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes No Indoors Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors
40 5200 5190–5210 20 U-NII-1 Yes Indoors Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes Yes Indoors Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors
42 5210 5170–5250 80 U-NII-1 Yes Indoors Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes No No No Indoors Indoors No No Yes Indoors Indoors
44 5220 5210–5230 20 U-NII-1 Yes Indoors Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes Yes Indoors Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors
46 5230 5210–5250 40 U-NII-1 Yes Indoors Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes No Indoors Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors
48 5240 5230–5250 20 U-NII-1 Yes Indoors Indoors Indoors Indoors/TPC or [note 1] Indoors Indoors Yes Yes Indoors Yes Indoors Indoors Indoors/DFS/
TPC
Indoors Yes Indoors Indoors
50 5250 5170–5330 160 U-NII-1 and U-NII-2A DFS Indoors/DFS Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC No No No No Indoors/DFS/
TPC or[note 1]
No No DFS Indoors Indoors/DFS
52 5260 5250–5270 20 U-NII-2A DFS DFS Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC DFS/TPC Indoors/DFS/
TPC or[note 1]
Yes Indoors Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC Indoors/DFS
54 5270 5250–5290 40 U-NII-2A DFS DFS Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC No Indoors No Indoors Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC Indoors/DFS
56 5280 5270–5290 20 U-NII-2A DFS DFS Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC DFS/TPC Indoors/DFS/
TPC or[note 1]
Yes Indoors Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC Indoors/DFS
58 5290 5250–5330 80 U-NII-2A DFS DFS Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC No No No Indoors Indoors/DFS/
TPC or[note 1]
No No DFS Yes Indoors/DFS
60 5300 5290–5310 20 U-NII-2A DFS DFS Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC DFS/TPC Indoors/DFS/
TPC or[note 1]
Yes Indoors Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC Indoors/DFS
62 5310 5290–5330 40 U-NII-2A DFS DFS Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC No Indoors No Indoors Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC Indoors/DFS
64 5320 5310–5330 20 U-NII-2A DFS DFS Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/TPC or [note 1] Indoors/DFS/
TPC
Indoors DFS/TPC DFS/TPC Indoors/DFS/
TPC or[note 1]
Yes Indoors Indoors/DFS/
TPC or[note 1]
Indoors/DFS/
TPC
Indoors DFS DFS/TPC Indoors/DFS
68 5340 5330–5350 20 No No No U-NII-2A Unknown Unknown Indoors/DFS/
TPC
Indoors/DFS/
TPC
Indoors/TPC or [note 1] Unknown Yes DFS/TPC Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Indoors/DFS
96 5480 5470–5490 20 No No No U-NII-2C Unknown Unknown DFS/TPC DFS/TPC No Unknown Yes DFS/TPC Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown
100 5500 5490–5510 20 U-NII-2C DFS DFS DFS/TPC DFS/TPC No DFS/TPC Yes DFS/TPC No No Yes DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
102 5510 5490–5530 40 U-NII-2C DFS DFS DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No No DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
104 5520 5510–5530 20 U-NII-2C DFS DFS DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No Yes DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
106 5530 5490–5570 80 U-NII-2C DFS DFS DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No No No Indoors/TPC or [note 2] No No DFS DFS/TPC No
108 5540 5530–5550 20 U-NII-2C DFS DFS DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No Yes DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
110 5550 5530–5570 40 U-NII-2C DFS DFS DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No No DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
112 5560 5550–5570 20 U-NII-2C DFS DFS DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No Yes DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
114 5570 5490–5650 160 U-NII-2C DFS No DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No No No No No No DFS DFS/TPC No
116 5580 5570–5590 20 U-NII-2C DFS DFS DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No Yes DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
118 5590 5570–5610 40 U-NII-2C DFS No DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No No DFS/TPC No Yes DFS DFS DFS/TPC No
120 5600 5590–5610 20 U-NII-2C DFS No DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No Yes DFS/TPC No Yes DFS DFS DFS/TPC No
122 5610 5570–5650 80 U-NII-2C DFS No DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No No No No No No DFS DFS/TPC No
124 5620 5610–5630 20 U-NII-2C DFS No DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No Yes DFS/TPC No Yes DFS DFS DFS/TPC No
126 5630 5610–5650 40 U-NII-2C DFS No DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No No DFS/TPC No Yes DFS DFS DFS/TPC No
128 5640 5630–5650 20 U-NII-2C DFS No DFS/TPC DFS/TPC No DFS/TPC Unknown DFS/TPC No No Yes DFS/TPC No Yes DFS DFS DFS/TPC No
132 5660 5650–5670 20 No U-NII-2C DFS DFS DFS/TPC DFS/TPC Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No No DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
134 5670 5650–5690 40 No U-NII-2C DFS DFS DFS/TPC DFS/TPC Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No No DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
136 5680 5670–5690 20 No U-NII-2C DFS DFS DFS/TPC DFS/TPC Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No No DFS/TPC DFS/TPC or [note 2] Yes DFS DFS DFS/TPC No
138 5690 5650–5730 80 No U-NII-2C and U-NII-3 DFS DFS DFS/TPC DFS/TPC Indoors/TPC or [note 1] No Unknown DFS/TPC No No No No DFS/TPC or [note 2] No No No DFS/TPC No
140 5700 5690–5710 20 No U-NII-2C DFS DFS DFS/TPC DFS/TPC Indoors/TPC or [note 1] DFS/TPC Unknown DFS/TPC No No No DFS/TPC Indoors/TPC or [note 2] Yes DFS DFS DFS/TPC No
142 5710 5690–5730 40 No U-NII-2C and U-NII-3 DFS DFS DFS/TPC DFS/TPC Indoors/TPC or [note 1] No Unknown DFS/TPC No No No No DFS/TPC or [note 2] No No No DFS/TPC DFS/TPC/
Indoor/Fixed
144 5720 5710–5730 20 No U-NII-2C and U-NII-3 DFS DFS DFS + SRD (25 mW) DFS + SRD (25 mW) Indoors/TPC or [note 1] No Indoors DFS/TPC No No No No DFS/TPC or [note 2] No No No DFS/TPC DFS/TPC/
Indoor/Fixed
149 5745 5735–5755 20 No U-NII-3 Yes Yes SRD (25 mW)[53] SRD (25 mW)[53] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Indoor/Fixed
151 5755 5735–5775 40 No U-NII-3 Yes Yes SRD (25 mW)[53] SRD (25 mW)[53] Indoors/TPC or [note 1] No Indoors Yes No No Yes No Yes No Yes Yes Yes DFS/TPC/
Indoor/Fixed
153 5765 5755–5775 20 No U-NII-3 Yes Yes SRD (25 mW)[53] SRD (25 mW)[53] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Indoor/Fixed
155 5775 5735–5815 80 No U-NII-3 Yes Yes SRD (25 mW)[53] SRD (25 mW)[53] Indoors/TPC or [note 1] No Indoors Yes No No No No Yes No No Yes Yes DFS/TPC/
Indoor/Fixed
157 5785 5775–5795 20 No U-NII-3 Yes Yes SRD (25 mW)[53] SRD (25 mW)[53] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Indoor/Fixed
159 5795 5775–5815 40 No U-NII-3 Yes Yes SRD (25 mW)[53] SRD (25 mW)[53] Indoors/TPC or [note 1] No Indoors Yes No No Yes No Yes No Yes Yes Yes DFS/TPC/
Indoor/Fixed
161 5805 5795–5815 20 No U-NII-3 Yes Yes SRD (25 mW)[53] SRD (25 mW)[53] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Indoor/Fixed
165 5825 5815–5835 20 No No No U-NII-3 Yes Yes SRD (25 mW)[53] SRD (25 mW)[53] Indoors/TPC or [note 1] No Indoors Yes Yes No Yes No Yes No Yes Yes Yes DFS/TPC/
Indoor/Fixed
169 5845 5835–5855 20 No No No N/A No No SRD (25 mW)[53] No No No Yes Yes No No No No No No No No No DFS/TPC/
Indoor/Fixed
173 5865 5855–5875 20 No No No N/A No No SRD (25 mW)[53] No No No Yes No No No No No No No No No No No
183 4915 4910–4920 10 No No No N/A No No No No No registration needed Unknown No No No No No No No No No No No
184 4920 4910–4930 20 No No No N/A No No No No No registration needed Unknown No No No No No No No No No No No
185 4925 4920–4930 10 No No No N/A No No No No No registration needed Unknown No No No No No No No No No No No
187 4935 4930–4940 10 No No No N/A No No No No No registration needed Unknown No No No No No No No No No No No
188 4940 4930–4950 20 No No No N/A No No No No No registration needed Unknown No No No No No No No No No No No
189 4945 4940–4950 10 No No No N/A No No No No No registration needed Unknown No No No No No No No No No No No
192 4960 4950–4970 20 No No No N/A No No No No No registration needed Unknown No No No No No No No No No No No
196 4980 4970–4990 20 No No No N/A No No No No No registration needed Unknown 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 Switzerland Russia Japan India Singapore China Israel Korea Turkey Australia South Africa Brazil Taiwan New Zealand Bahrain
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 otherwise limited to 100 mW instead of 200 mW
  2. ^ a b c d e f g h i j k l m n o otherwise limited to 500 mW instead of 1 W
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 be used with SRD 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 + SRD MUST be used with DFS and SRD.
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

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.[54]

5.9 GHz (802.11p)[edit]

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

60 GHz (802.11ad/ay)[edit]

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

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[55]
902–904 1, 2
904–920 1, 2, 4, 8, 16
920–928 1, 2, 4, 8

See also[edit]

Notes[edit]

^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[56] 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.[57] 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,[58] which is subject to strict emission limits set out in 47 CFR § 15.205.[59] 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"[60]

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)

References[edit]

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Further reading[edit]