On Tue, Jul 07, 2015 at 04:07:15PM +0800, Chen-Yu Tsai wrote: > Taiwan's Ministry of Transportation and Communications revised its > frequency allocation rules [1], specifically opening up 5.15 GHz ~ > 5.25 GHz and 5.6 GHz ~ 5.65 GHz for U-NII applications, as well as > explicitly mentioning U-NII applications and DFS requirements for > the related frequency ranges. > > LP0002 [2], the technical standard for low power radio devices, hasn't > been updated,though work is under way. The NCC, Taiwan's equivalent of > the US FCC, has explicitly [3][4] allowed certification under the newest > FCC Part 15E limitations, though unwanted emissions must still conform > to LP0002 sections 2.7 ~ 2.8: > > - 5150 MHz ~ 5250 MHz is not restricted to indoor usage. > > - 5250 MHz ~ 5350 MHz and 5470 MHz ~ 5725 MHz devices should have DFS > capabilities, and conform to latest FCC radar standards. > > - 5250 MHz ~ 5350 MHz without DFS capabilities are limited to indoor > usage, under current LP0002 restrictions. > > In addition, large channels across multiple U-NII bands are allowed > under the same rules as FCC KDB 644545 [5]. > > This patch updates the regulatory rules for Taiwan (TW) to reflect the > changes noted above, and corrects transmit power limits for 5470 MHz ~ > 5725 MHz. In addition, the format of the rules has been modified: > > - List band boundaries, instead of channel boundaries, and add AUTO-BW > for adjacent bands. > > - List maximum transmit power using mW instead of dBm. This is easier > to find from the related documents. > > [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 > [3] http://www.rheintech.com/our-blog/item/585-taiwan-ncc-opens-5150-5250-mhz-for-wireless-devices > [4] Proposal #10312260 (p.6, Chinese), > http://www.etc.org.tw/_library/K00/%E9%9B%BB%E4%BF%A1%E7%B5%82%E7%AB%AF%E8%A8%AD%E5%82%99%E5%AF%A9%E9%A9%97/1031223_nccqa56.pdf > [5] Proposal #10202205 (p.3, Chinese), > http://www.etc.org.tw/_library/K00/%E4%BD%8E%E5%8A%9F%E7%8E%87%E8%A8%AD%E5%82%99%E5%AF%A9%E9%A9%97/1020221_nccqa50.pdf > > Signed-off-by: Chen-Yu Tsai <wens at csie.org> > --- > > Hi everyone, > > First of all, I am _not_ a regulatory or wireless expert, nor is my > field of work related, unless you count deploying access points as > related. > > Last week I bought and deployed a new "Tri-band" 802.11ac wireless > router, and it was using channels 36~44, which previously was not > available in Taiwan. After asking around, a friend at the vendor > said that Taiwan recently opened up that part of the spectrum. > > Unfortunately, [4][5] are Q&As transcripts with the regulatory body. > I cound only find them in Chinese. Suffice to say, Taiwan's NCC > follows the FCC closely whenever possible when it comes to wireless > stuff. > > As such, I also looked at the US rules. It seems they are using > "peak power spectral density" instead of "peak power output". > I believe this is wrong. My crude understanding is the former > is the amount of power in a single chunk of the complete channel, > while the latter is the actual power put out by the transmitter. > The former would be used to enforce a more uniform power distribution > over the wireless channel, while the later actually limits transmission > power, and thus range. I certainly don't qualify as a regulatory expert either. But the rules you're proposing to change came from Qualcomm Atheros, and I do have considerable confidence in their regualtory expertise. Therefore I'd want an ack from QCA before I'd consider applying this patch. I would however consider an update for 5.15-5.25 GHz and 5.6-5.65 GHz provided that there's official documentation to substantiate the change. I unfortunately cannot read Chinese, so I would need some assistance to confirm the documentation. Thanks, Seth
