| developer | a11349d | 2022-06-02 01:06:38 +0800 | [diff] [blame] | 1 | From e3f03f9236c25c3270aa3807ce5dcc315395ee83 Mon Sep 17 00:00:00 2001 |
| 2 | From: Dennis Bland <dennis@dbperformance.com> |
| 3 | Date: Wed, 20 Apr 2022 20:40:51 -0600 |
| 4 | Subject: [PATCH 1/5] Regulatory update for 6 GHz operation in Canada (CA) |
| 5 | |
| 6 | With the 6 GHz band (U-NII-5, U-NII-6, U-NII-7, U-NII-8) in Canada, ISED |
| 7 | introduces the concept of a fixed PSD (Power Spectral Density) for all |
| 8 | supported 6 GHz channel widths. Wider channel widths have a higher noise |
| 9 | floor, therefore specifying a fixed PSD allows wider channels to |
| 10 | operate at a higher EIRP to maintain the same S/N ratio as smaller |
| 11 | channel widths. |
| 12 | |
| 13 | Clause 4.6.2 requires non-client (AP devices to have a maximum PSD of 5 |
| 14 | dBm/MHz and a maximum EIRP of 30 dBm. Clause 4.6.3 requires client (STA) |
| 15 | devices to have a maximum PSD of -1 dBm/MHz. Clause 4.4 specifies a |
| 16 | maximum channel width of 320 MHz. Clause 4.9 specifies indoor use only. |
| 17 | Operation on oil platforms, vehicles, boats, trains, and drones is |
| 18 | prohibited except on commercial aircraft above 10,000 feet altitude. |
| 19 | There is no IR (Initiate Radiation) restriction mentioned in the 6 GHz |
| 20 | specification. |
| 21 | |
| 22 | The following equation is used to calculate the EIRP from the PSD and |
| 23 | channel width: |
| 24 | |
| 25 | EIRP = PSD + 10*log(channel width in MHz) |
| 26 | |
| 27 | Using the maximum PSD values of 5 and -1 for APs and STAs respectively, |
| 28 | the EIRP in dBm for a given channel width can be calculated: |
| 29 | |
| 30 | Channel Width (MHz) AP STA |
| 31 | ------------------------------------------------ |
| 32 | 20 18 12 |
| 33 | 40 21 15 |
| 34 | 80 24 18 |
| 35 | 160 27 21 |
| 36 | 320 31 (max 30) 25 (max 24) |
| 37 | |
| 38 | For channel widths up to 160 MHz, the maximum PSD is the limiting factor. |
| 39 | For the 320 MHz channel width, the maximum EIRP is the limiting factor. |
| 40 | |
| 41 | Unfortunately, because there is currently no mechanism to specify |
| 42 | different power levels for AP and STA modes, and for different channel |
| 43 | widths, the smallest value has to be selected, which is 12 dBm. This |
| 44 | will likely cause connectivity problems with larger channel widths until |
| 45 | these additional parameters can be added. |
| 46 | |
| 47 | Signed-off-by: Dennis Bland <dennis@dbperformance.com> |
| 48 | Signed-off-by: Seth Forshee <sforshee@kernel.org> |
| 49 | --- |
| 50 | db.txt | 4 +++- |
| 51 | 1 file changed, 3 insertions(+), 1 deletion(-) |
| 52 | |
| 53 | diff --git a/db.txt b/db.txt |
| 54 | index 41f94f8..062ad8a 100644 |
| 55 | --- a/db.txt |
| 56 | +++ b/db.txt |
| 57 | @@ -298,8 +298,9 @@ country BZ: DFS-JP |
| 58 | (2402 - 2482 @ 40), (30) |
| 59 | (5735 - 5835 @ 80), (30) |
| 60 | |
| 61 | -# Source: |
| 62 | +# Sources: |
| 63 | # https://www.ic.gc.ca/eic/site/smt-gst.nsf/vwapj/rss-247-i2-e.pdf/$file/rss-247-i2-e.pdf |
| 64 | +# https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf11750.html (6 GHz operation) |
| 65 | country CA: DFS-FCC |
| 66 | (2402 - 2472 @ 40), (30) |
| 67 | (5150 - 5250 @ 80), (23), NO-OUTDOOR, AUTO-BW |
| 68 | @@ -307,6 +308,7 @@ country CA: DFS-FCC |
| 69 | (5470 - 5600 @ 80), (24), DFS |
| 70 | (5650 - 5730 @ 80), (24), DFS |
| 71 | (5735 - 5835 @ 80), (30) |
| 72 | + (5925 - 7125 @ 320), (12), NO-OUTDOOR |
| 73 | |
| 74 | # Source: |
| 75 | # http://www.art-rca.org |
| 76 | -- |
| 77 | 2.29.2 |
| 78 | |