Return-path: Received: from smtp.csie.ntu.edu.tw ([140.112.30.61]:35700 "EHLO smtp.csie.ntu.edu.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753615AbbGGIHc (ORCPT ); Tue, 7 Jul 2015 04:07:32 -0400 From: Chen-Yu Tsai To: seth.forshee@canonical.com Cc: Chen-Yu Tsai , wireless-regdb@lists.infradead.org, linux-wireless@vger.kernel.org Subject: [PATCH] wireless-regdb: Update regulatory rules for Taiwan (TW) Date: Tue, 7 Jul 2015 16:07:15 +0800 Message-Id: <1436256435-25048-1-git-send-email-wens@csie.org> (sfid-20150707_100743_638367_7E353868) Sender: linux-wireless-owner@vger.kernel.org List-ID: 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 --- 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. Regards ChenYu --- db.txt | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/db.txt b/db.txt index 809cd3c..f1c110d 100644 --- a/db.txt +++ b/db.txt @@ -1117,12 +1117,20 @@ country TT: DFS-FCC (5490 - 5730 @ 160), (24), DFS (5735 - 5835 @ 80), (30) -country TW: DFS-JP - (2402 - 2472 @ 40), (30) - (5270 - 5330 @ 40), (17), DFS - (5490 - 5590 @ 80), (30), DFS - (5650 - 5710 @ 40), (30), 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 / 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-FCC + (2400 - 2483.5 @ 40), (1000 mW) + (5150 - 5250 @ 80), (1000 mW), AUTO-BW + (5250 - 5350 @ 80), (250 mW), DFS, AUTO-BW + (5470 - 5725 @ 160), (250 mW), DFS, AUTO-BW + (5725 - 5850 @ 80), (1000 mW), AUTO-BW country TZ: (2402 - 2482 @ 40), (20) -- 2.1.4