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