The FCC is trying to assist airports that use Terminal Doppler Weather Radar (TDWR) systems in avoiding interference with some outdoor wireless systems operating in the 5.4 GHz (5470 MHz - 5725 MHz) band. One of the things they have decided on is to disallow operation on the 5600 MHz - 5650 MHz frequency range inclusive. What this means in practice is 5 GHz 802.11 devices programmed to operate in the US will have these channels now disabled: * 5600 MHz [120] (disabled) * 5620 MHz [124] (disabled) * 5640 MHz [128] (disabled) Channel on 5660 MHz (132) will be left enabled as the channel bandwidth is 20 MHz for legacy 802.11 networks but note that HT40- will be disallowed for that channel. The HT40+ and HT40- allowed channel map obviously changes. This is computed dynamically on cfg80211 based on your allowed channel list. For a US based device this is what you will get now (excerpt from on /sys/kernel/debug/ieee80211/phy0): .. etc .. 5540 HT40 -+ 5560 HT40 -+ 5580 HT40 - 5600 Disabled 5620 Disabled 5640 Disabled 5660 HT40 + 5680 HT40 -+ .. etc .. The details on which this patch is based on is documented on the FCC Knowledge based Publication Number: 443999 [1] [1] https://fjallfoss.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41732 Cc: Michael Green <Michael.Green@xxxxxxxxxxx> Cc: Senthil Balasubramanian <senthilkumar@xxxxxxxxxxx> Cc: David Quan <David.Quan@xxxxxxxxxxx> Cc: Vivek Natarajan <Vivek.Natarajan@xxxxxxxxxxx> Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx> --- db.txt | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/db.txt b/db.txt index 84be443..c71b35b 100644 --- a/db.txt +++ b/db.txt @@ -562,7 +562,8 @@ country US: (2402 - 2472 @ 40), (3, 27) (5170 - 5250 @ 40), (3, 17) (5250 - 5330 @ 40), (3, 20), DFS - (5490 - 5710 @ 40), (3, 20), DFS + (5490 - 5600 @ 40), (3, 20), DFS + (5650 - 5710 @ 40), (3, 20), DFS (5735 - 5835 @ 40), (3, 30) country UY: -- 1.6.5.2.143.g8cc62 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
