| Message ID | 1437622380-4154-2-git-send-email-wens@csie.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Kalle Valo |
| Headers | show |
On Thu, Jul 23, 2015 at 11:32:56AM +0800, Chen-Yu Tsai wrote: > Taiwan's Ministry of Transportation and Communications revised its > frequency allocation rules [1] on 2014/11/17, allowing usage of 5600 ~ > 5650 MHz, previously allocated to weather radars, to U-NII applications > with DFS support. > > Also, the technical regulations [2] show that for 5470 ~ 5725 MHz U-NII > applications, the peak transmit power shall not exceed the lesser of > 250 mW (slightly less than 24 dBm) or 11 dBm + 10log B, where B is the > 26dB emission bandwidth in MHz. This is slightly more than 23 dBm for > 20 MHz channels. > > This patch updates both. Also add links to the two documents into the > database. > > [1] http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc&filedisplay=Table+of+radio+frequency+allocation.doc > [2] http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 > > Signed-off-by: Chen-Yu Tsai <wens@csie.org> Sorry for the slow response to these patches. > --- > db.txt | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/db.txt b/db.txt > index 982db34..5114557 100644 > --- a/db.txt > +++ b/db.txt > @@ -1118,11 +1118,17 @@ country TT: DFS-FCC > (5490 - 5730 @ 160), (24), DFS > (5735 - 5835 @ 80), (30) > > +# Source: > +# Table of Frequency Allocations of Republic of China (Taiwan) / Nov 2014: > +# http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc& \ > +# filedisplay=Table+of+radio+frequency+allocation.doc > +# LP0002 Low-power Radio-frequency Devices Technical Regulations / 28 Jun 2011: > +# http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 > +# (section 3.10.1, 4.7) > country TW: DFS-JP > (2402 - 2472 @ 40), (30) > (5270 - 5330 @ 40), (17), DFS > - (5490 - 5590 @ 80), (30), DFS > - (5650 - 5710 @ 40), (30), DFS > + (5470 - 5725 @ 160), (23), DFS Based on [2], it looks like this range requires TPC, in which case the power limit should be dropped by 3 dB on account of our not supporting TPC. -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Aug 4, 2015 at 2:27 AM, Seth Forshee <seth.forshee@canonical.com> wrote: > On Thu, Jul 23, 2015 at 11:32:56AM +0800, Chen-Yu Tsai wrote: >> Taiwan's Ministry of Transportation and Communications revised its >> frequency allocation rules [1] on 2014/11/17, allowing usage of 5600 ~ >> 5650 MHz, previously allocated to weather radars, to U-NII applications >> with DFS support. >> >> Also, the technical regulations [2] show that for 5470 ~ 5725 MHz U-NII >> applications, the peak transmit power shall not exceed the lesser of >> 250 mW (slightly less than 24 dBm) or 11 dBm + 10log B, where B is the >> 26dB emission bandwidth in MHz. This is slightly more than 23 dBm for >> 20 MHz channels. >> >> This patch updates both. Also add links to the two documents into the >> database. >> >> [1] http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc&filedisplay=Table+of+radio+frequency+allocation.doc >> [2] http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 >> >> Signed-off-by: Chen-Yu Tsai <wens@csie.org> > > Sorry for the slow response to these patches. > >> --- >> db.txt | 10 ++++++++-- >> 1 file changed, 8 insertions(+), 2 deletions(-) >> >> diff --git a/db.txt b/db.txt >> index 982db34..5114557 100644 >> --- a/db.txt >> +++ b/db.txt >> @@ -1118,11 +1118,17 @@ country TT: DFS-FCC >> (5490 - 5730 @ 160), (24), DFS >> (5735 - 5835 @ 80), (30) >> >> +# Source: >> +# Table of Frequency Allocations of Republic of China (Taiwan) / Nov 2014: >> +# http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc& \ >> +# filedisplay=Table+of+radio+frequency+allocation.doc >> +# LP0002 Low-power Radio-frequency Devices Technical Regulations / 28 Jun 2011: >> +# http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 >> +# (section 3.10.1, 4.7) >> country TW: DFS-JP >> (2402 - 2472 @ 40), (30) >> (5270 - 5330 @ 40), (17), DFS >> - (5490 - 5590 @ 80), (30), DFS >> - (5650 - 5710 @ 40), (30), DFS >> + (5470 - 5725 @ 160), (23), DFS > > Based on [2], it looks like this range requires TPC, in which case the > power limit should be dropped by 3 dB on account of our not supporting > TPC. Will fix. Is there any plan to support multiple rules per band? Such as different power limits with vs without TPC, or something like DFS vs indoor only? ChenYu -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Aug 4, 2015 at 9:26 AM, Chen-Yu Tsai <wens@csie.org> wrote: > On Tue, Aug 4, 2015 at 2:27 AM, Seth Forshee <seth.forshee@canonical.com> wrote: >> On Thu, Jul 23, 2015 at 11:32:56AM +0800, Chen-Yu Tsai wrote: >>> Taiwan's Ministry of Transportation and Communications revised its >>> frequency allocation rules [1] on 2014/11/17, allowing usage of 5600 ~ >>> 5650 MHz, previously allocated to weather radars, to U-NII applications >>> with DFS support. >>> >>> Also, the technical regulations [2] show that for 5470 ~ 5725 MHz U-NII >>> applications, the peak transmit power shall not exceed the lesser of >>> 250 mW (slightly less than 24 dBm) or 11 dBm + 10log B, where B is the >>> 26dB emission bandwidth in MHz. This is slightly more than 23 dBm for >>> 20 MHz channels. >>> >>> This patch updates both. Also add links to the two documents into the >>> database. >>> >>> [1] http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc&filedisplay=Table+of+radio+frequency+allocation.doc >>> [2] http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 >>> >>> Signed-off-by: Chen-Yu Tsai <wens@csie.org> >> >> Sorry for the slow response to these patches. >> >>> --- >>> db.txt | 10 ++++++++-- >>> 1 file changed, 8 insertions(+), 2 deletions(-) >>> >>> diff --git a/db.txt b/db.txt >>> index 982db34..5114557 100644 >>> --- a/db.txt >>> +++ b/db.txt >>> @@ -1118,11 +1118,17 @@ country TT: DFS-FCC >>> (5490 - 5730 @ 160), (24), DFS >>> (5735 - 5835 @ 80), (30) >>> >>> +# Source: >>> +# Table of Frequency Allocations of Republic of China (Taiwan) / Nov 2014: >>> +# http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc& \ >>> +# filedisplay=Table+of+radio+frequency+allocation.doc >>> +# LP0002 Low-power Radio-frequency Devices Technical Regulations / 28 Jun 2011: >>> +# http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 >>> +# (section 3.10.1, 4.7) >>> country TW: DFS-JP >>> (2402 - 2472 @ 40), (30) >>> (5270 - 5330 @ 40), (17), DFS >>> - (5490 - 5590 @ 80), (30), DFS >>> - (5650 - 5710 @ 40), (30), DFS >>> + (5470 - 5725 @ 160), (23), DFS >> >> Based on [2], it looks like this range requires TPC, in which case the >> power limit should be dropped by 3 dB on account of our not supporting >> TPC. > > Will fix. > > Is there any plan to support multiple rules per band? Such as different > power limits with vs without TPC, or something like DFS vs indoor only? BTW, this band has the exact same restrictions as the US, as specified by the FCC. The relevant rules were added in f894543 wireless-regdb: Add back regulatory rules for US and expanded to cover the whole band in 3c61549 wireless-regdb: Update 5GHz rules for US These show the power limit at 23 dBm as well. Any comments on this? ChenYu -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Aug 04, 2015 at 09:55:06AM +0800, Chen-Yu Tsai wrote: > On Tue, Aug 4, 2015 at 9:26 AM, Chen-Yu Tsai <wens@csie.org> wrote: > > On Tue, Aug 4, 2015 at 2:27 AM, Seth Forshee <seth.forshee@canonical.com> wrote: > >> On Thu, Jul 23, 2015 at 11:32:56AM +0800, Chen-Yu Tsai wrote: > >>> Taiwan's Ministry of Transportation and Communications revised its > >>> frequency allocation rules [1] on 2014/11/17, allowing usage of 5600 ~ > >>> 5650 MHz, previously allocated to weather radars, to U-NII applications > >>> with DFS support. > >>> > >>> Also, the technical regulations [2] show that for 5470 ~ 5725 MHz U-NII > >>> applications, the peak transmit power shall not exceed the lesser of > >>> 250 mW (slightly less than 24 dBm) or 11 dBm + 10log B, where B is the > >>> 26dB emission bandwidth in MHz. This is slightly more than 23 dBm for > >>> 20 MHz channels. > >>> > >>> This patch updates both. Also add links to the two documents into the > >>> database. > >>> > >>> [1] http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc&filedisplay=Table+of+radio+frequency+allocation.doc > >>> [2] http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 > >>> > >>> Signed-off-by: Chen-Yu Tsai <wens@csie.org> > >> > >> Sorry for the slow response to these patches. > >> > >>> --- > >>> db.txt | 10 ++++++++-- > >>> 1 file changed, 8 insertions(+), 2 deletions(-) > >>> > >>> diff --git a/db.txt b/db.txt > >>> index 982db34..5114557 100644 > >>> --- a/db.txt > >>> +++ b/db.txt > >>> @@ -1118,11 +1118,17 @@ country TT: DFS-FCC > >>> (5490 - 5730 @ 160), (24), DFS > >>> (5735 - 5835 @ 80), (30) > >>> > >>> +# Source: > >>> +# Table of Frequency Allocations of Republic of China (Taiwan) / Nov 2014: > >>> +# http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc& \ > >>> +# filedisplay=Table+of+radio+frequency+allocation.doc > >>> +# LP0002 Low-power Radio-frequency Devices Technical Regulations / 28 Jun 2011: > >>> +# http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 > >>> +# (section 3.10.1, 4.7) > >>> country TW: DFS-JP > >>> (2402 - 2472 @ 40), (30) > >>> (5270 - 5330 @ 40), (17), DFS > >>> - (5490 - 5590 @ 80), (30), DFS > >>> - (5650 - 5710 @ 40), (30), DFS > >>> + (5470 - 5725 @ 160), (23), DFS > >> > >> Based on [2], it looks like this range requires TPC, in which case the > >> power limit should be dropped by 3 dB on account of our not supporting > >> TPC. > > > > Will fix. > > > > Is there any plan to support multiple rules per band? Such as different > > power limits with vs without TPC, or something like DFS vs indoor only? Not that I know of. Currently the binary database format is a constraint on doing anything like that. > BTW, this band has the exact same restrictions as the US, as specified > by the FCC. The relevant rules were added in > > f894543 wireless-regdb: Add back regulatory rules for US > > and expanded to cover the whole band in > > 3c61549 wireless-regdb: Update 5GHz rules for US > > These show the power limit at 23 dBm as well. Any comments on this? Good question. Afaict this probably originates with commit 31dc1c5e which defines the limit for 5250-5330 MHz in the US, then using the same limit for the 5490-5730 MHz rule seemed logical. The 5250-5330 MHz rule came from QCA then. Adding Jouni to the Cc to see if he can help clarify how they arrived at 23 dBm. Hmm, I see now that 15.407(h)(1) says that TPC is not required for systems with an EIRP of less than 500 mW. In that case I guess maybe we don't need to drop the power limit by 3 dB, so in light of that 23 dBm does make sense. The documents you linked to say the same, seemingly word-for-word, so in all likelihood 23 dBm is actually okay. Thanks, Seth -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/db.txt b/db.txt index 982db34..5114557 100644 --- a/db.txt +++ b/db.txt @@ -1118,11 +1118,17 @@ country TT: DFS-FCC (5490 - 5730 @ 160), (24), DFS (5735 - 5835 @ 80), (30) +# Source: +# Table of Frequency Allocations of Republic of China (Taiwan) / Nov 2014: +# http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc& \ +# filedisplay=Table+of+radio+frequency+allocation.doc +# LP0002 Low-power Radio-frequency Devices Technical Regulations / 28 Jun 2011: +# http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 +# (section 3.10.1, 4.7) country TW: DFS-JP (2402 - 2472 @ 40), (30) (5270 - 5330 @ 40), (17), DFS - (5490 - 5590 @ 80), (30), DFS - (5650 - 5710 @ 40), (30), DFS + (5470 - 5725 @ 160), (23), DFS (5735 - 5835 @ 80), (30) country TZ:
Taiwan's Ministry of Transportation and Communications revised its frequency allocation rules [1] on 2014/11/17, allowing usage of 5600 ~ 5650 MHz, previously allocated to weather radars, to U-NII applications with DFS support. Also, the technical regulations [2] show that for 5470 ~ 5725 MHz U-NII applications, the peak transmit power shall not exceed the lesser of 250 mW (slightly less than 24 dBm) or 11 dBm + 10log B, where B is the 26dB emission bandwidth in MHz. This is slightly more than 23 dBm for 20 MHz channels. This patch updates both. Also add links to the two documents into the database. [1] http://www.motc.gov.tw/websitedowndoc?file=post/201411171137330.doc&filedisplay=Table+of+radio+frequency+allocation.doc [2] http://www.ncc.gov.tw/english/show_file.aspx?table_name=news&file_sn=681 Signed-off-by: Chen-Yu Tsai <wens@csie.org> --- db.txt | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)