802.11ak Channels ====================== .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What frequency bands does 802.11ak operate in?** 802.11ak operates primarily in the 2.4 GHz and 5 GHz bands. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How many channels are defined in the 2.4 GHz band for 802.11ak?** Typically 11 to 14 channels depending on regional regulations, similar to legacy 802.11 standards. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What channel bandwidths does 802.11ak support?** 802.11ak supports 5 MHz, 10 MHz, and 20 MHz channel bandwidths. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Are channel widths narrower in 802.11ak compared to 802.11ac?** Yes, 802.11ak supports narrower 5 MHz and 10 MHz channels in addition to 20 MHz, aiding extended range. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the purpose of supporting narrower channels?** Narrower channels improve signal robustness and penetration, especially in industrial or harsh environments. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How many subcarriers are used for a 20 MHz channel?** For 20 MHz, 234 usable subcarriers are defined with a 256-point FFT. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11ak support dynamic channel selection?** Yes, it supports dynamic channel allocation and selection similar to other 802.11 standards. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Are the channels contiguous or can they be non-contiguous?** Channels are contiguous; non-contiguous channel bonding is not defined in 802.11ak. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What regulatory domain considerations apply to 802.11ak channels?** Channel availability and power limits depend on local country regulations and domain settings. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can 802.11ak channels be used simultaneously with legacy 802.11?** Yes, coexistence mechanisms ensure 802.11ak devices can operate alongside legacy devices. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What are the center frequencies for 5 MHz channels in 802.11ak?** Center frequencies are spaced at 5 MHz intervals, matching half the spacing of traditional 10 MHz channels. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11ak support DFS (Dynamic Frequency Selection)?** Yes, 802.11ak supports DFS in the 5 GHz band for radar avoidance. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does channel bonding work in 802.11ak?** 802.11ak does not support wider-than-20 MHz channel bonding; it focuses on narrow channels. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Are guard bands required between 802.11ak channels?** Yes, guard bands help reduce interference between adjacent channels. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does 802.11ak handle interference on crowded channels?** By using narrower channels and dynamic channel selection to find cleaner spectrum. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What channel numbering scheme does 802.11ak follow?** It follows the same numbering scheme as 802.11ac and previous standards. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is there support for channel aggregation in 802.11ak?** No, 802.11ak focuses on single-channel operation without aggregation. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Where can I find the detailed channel plan for 802.11ak?** The IEEE 802.11ak amendment document and regulatory bodies provide detailed channel plans. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow Topics in this section, * :ref:`List of channels ` * :ref:`List of channel widths ` * :ref:`List of Bands ` * :ref:`Reference links ` .. _channels_ak_step4: .. tab-set:: .. tab-item:: 2.4 GHz Channels for 802.11ak ===================== ======================= ====================== ============== Channel Number (MHz) Center Frequency (MHz) Frequency Range DFS Required ===================== ======================= ====================== ============== 1 2412 2401 – 2423 No 2 2417 2406 – 2428 No 3 2422 2411 – 2433 No 4 2427 2416 – 2438 No 5 2432 2421 – 2443 No 6 2437 2426 – 2448 No 7 2442 2431 – 2453 No 8 2447 2436 – 2458 No 9 2452 2441 – 2463 No 10 2457 2446 – 2468 No 11 2462 2451 – 2473 No 12 2467 2456 – 2478 No (region dependent) 13 2472 2461 – 2483 No (region dependent) 14 2484 2473 – 2495 No (Japan only) ===================== ======================= ====================== ============== .. tab-item:: 5 GHz Channels for 802.11ak ===================== ======================= ====================== ============== Channel Number (MHz) Center Frequency (MHz) Frequency Range DFS Required ===================== ======================= ====================== ============== 36 5180 5170 – 5190 No 40 5200 5190 – 5210 No 44 5220 5210 – 5230 No 48 5240 5230 – 5250 No 52 5260 5250 – 5270 Yes 56 5280 5270 – 5290 Yes 60 5300 5290 – 5310 Yes 64 5320 5310 – 5330 Yes 100 5500 5490 – 5510 Yes 104 5520 5510 – 5530 Yes 108 5540 5530 – 5550 Yes 112 5560 5550 – 5570 Yes 116 5580 5570 – 5590 Yes 120 5600 5590 – 5610 Yes 124 5620 5610 – 5630 Yes 128 5640 5630 – 5650 Yes 132 5660 5650 – 5670 Yes 136 5680 5670 – 5690 Yes 140 5700 5690 – 5710 Yes 144 5720 5710 – 5730 Yes 149 5745 5735 – 5755 No 153 5765 5755 – 5775 No 157 5785 5775 – 5795 No 161 5805 5795 – 5815 No 165 5825 5815 – 5835 No ===================== ======================= ====================== ============== .. _channels_ak_step5: .. tab-set:: .. tab-item:: List of channel widths * channel widths .. _channels_ak_step6: .. tab-set:: .. tab-item:: List of Bands ======================= ====================== ====================== ============================================================ Band Name Frequency Range (GHz) Frequency Range (MHz) Channels ======================= ====================== ====================== ============================================================ 2.4 GHz Band 2.400 – 2.485 2400 – 2485 1 – 14 (region dependent) UNII-1 5.150 – 5.250 5150 – 5250 36, 40, 44, 48 UNII-2 (DFS) 5.250 – 5.350 5250 – 5350 52, 56, 60, 64 UNII-2 Extended (DFS) 5.470 – 5.725 5470 – 5725 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144 UNII-3 5.725 – 5.825 5725 – 5825 149, 153, 157, 161, 165 ======================= ====================== ====================== ============================================================ .. _channels_ak_step17: .. tab-set:: .. tab-item:: Reference links * Reference links