802.11s 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 802.11s support for channels?** 802.11s operates in the 2.4 GHz and 5 GHz bands, depending on the underlying 802.11 PHY. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11s define new channel frequencies?** No, it uses the channel plans defined by the base 802.11 standards (a/b/g/n/ac). .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does 802.11s use channels differently from traditional Wi-Fi?** It supports multi-hop mesh networking by managing channel usage for mesh links between nodes. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is a mesh channel in 802.11s?** A mesh channel is the operating frequency used for communication between mesh nodes. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can mesh nodes operate on different channels simultaneously?** Yes, nodes can switch or operate on multiple channels to optimize network performance. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What channel widths does 802.11s support?** It supports standard channel widths like 20 MHz, 40 MHz, and wider depending on PHY capabilities. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How are channels selected in 802.11s mesh networks?** Channels are selected based on interference, load, and regulatory constraints to optimize performance. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11s support channel switching?** Yes, nodes can switch channels dynamically to improve mesh connectivity and reduce interference. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What role do beacon reports play in 802.11s channels?** Beacon reports provide information about neighbor channels and load to assist in channel management. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does channel load measurement help in 802.11s?** It helps nodes avoid congested channels and balance traffic across the mesh. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Are DFS channels supported in 802.11s?** Yes, 802.11s can operate on DFS (Dynamic Frequency Selection) channels where allowed by regulations. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can 802.11s mesh networks operate on 6 GHz channels?** Support depends on updates to the base standard and device capabilities, with newer standards enabling 6 GHz. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How does channel utilization affect mesh performance?** High utilization can cause congestion and packet loss, so 802.11s uses measurements to adapt channel usage. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is channel bonding in 802.11s?** Combining two or more adjacent channels to increase bandwidth and throughput in mesh links. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How are interference issues managed across mesh channels?** Through channel selection, power control, and dynamic switching to avoid overlapping networks. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Do mesh nodes coordinate channel assignments?** Yes, nodes exchange information to coordinate channel use and reduce conflicts. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the effect of channel width on mesh network range?** Wider channels can increase throughput but may reduce effective range due to higher noise susceptibility. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can 802.11s operate on non-overlapping channels?** Yes, using non-overlapping channels helps minimize interference in dense deployments. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Where can I find the official channel lists for 802.11s?** Channel lists are defined by the base 802.11 standards and regional regulatory bodies. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How do regulatory rules affect channel usage in 802.11s?** Regulatory domains restrict available channels and transmit power to ensure legal operation. .. 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_s_step4: .. tab-set:: .. tab-item:: 2.4 GHz Channels for 802.11s ===================== ======================= ====================== ============== 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 802.11s ===================== ======================= ====================== ============== 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_s_step5: .. tab-set:: .. tab-item:: List of channel widths * channel widths .. _channels_s_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_s_step17: .. tab-set:: .. tab-item:: Reference links * Reference links