* Re: [ath9k-devel] Radar Detection and DFS status [not found] <2d14e2ca0902110900r7f0b84e4k7be81827187c434@mail.gmail.com> @ 2009-02-11 21:41 ` Luis R. Rodriguez 2009-02-12 2:15 ` Sujith 2009-02-12 12:56 ` Alberto Pollastro 0 siblings, 2 replies; 6+ messages in thread From: Luis R. Rodriguez @ 2009-02-11 21:41 UTC (permalink / raw) To: mementux; +Cc: linux-wireless, ath9k-devel, Michael Green 2009/2/11 mementux <mementux@gmail.com>: > Hi! > > I would like to make an outdoor radio link at 5GHz between my house and one > of my neighbors. Because I live near an airport, I've looked for European in > force regulation regarding radar detection. I've discovered that ETSI has > released a new normative on Dicember 2008 (EN 301 893 v1.5). This normative > requires that WLAN devices with DFS capability must detect pulse width down > to 0.8us across the bands from 5250 to 5350MHz and from 5470 to 5725 MHz; > moreover they must detect staggered Pulse Repetition Frequency (PRF) radars > with 3 PRF value (I don't excactly know what it means). > > I have two devices with Atheros 5414 radio module, so I've looked for > support of radar detection (and 802.11h) in madwifi driver. I've seen that > the -dfs branch supports the EN 301 893 v1.4.1 and it implements 802.11h > protocol. Looking into the madwifi-dfs code I've seen that the hardware does > the pulse detection and the driver detects the radar recognizing the pulse > patterns (ath/if_ath_radar.c and ath/if_ath_radar.h). > > Because the pulse detection is done in hardware, I suppose that for > detecting pulse width down to 0.8us I need radio modules with newer chipset > like AR9xxx. Is it right? Can't I use my AR5414 radio modules? > So, I've searched in the code of ath9k and mac80211 but I don't find any > implementation of radar detection and 802.11h. Am I wrong? I've read on > http://wireless.kernel.org/en/users/Drivers/ath9k that 802.11h is a feature > of ath9k driver (and consecutively of mac80211, right?). > > I there any way to make an outdoor radio link at 5GHz compliant to the > European regulation with Linux? :-) mac80211 or ath9k does not yet have radar detection support so therefore no mac80211 driver will allow you to use any beaconing mode (AP | IBSS | Mesh) mode on DFS channels yet. Note that not all 5 GHz channels require radar detection though so you could try using one of the non-DFS channels. Check 'iw list' for that. ath9k STA should work with DFS but I didn't work on that myself so will leave someone else to comment on that. Luis ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ath9k-devel] Radar Detection and DFS status 2009-02-11 21:41 ` [ath9k-devel] Radar Detection and DFS status Luis R. Rodriguez @ 2009-02-12 2:15 ` Sujith 2009-02-12 12:56 ` Alberto Pollastro 1 sibling, 0 replies; 6+ messages in thread From: Sujith @ 2009-02-12 2:15 UTC (permalink / raw) To: Luis R. Rodriguez; +Cc: mementux, Michael Green, ath9k-devel, linux-wireless Luis R. Rodriguez wrote: > mac80211 or ath9k does not yet have radar detection support so > therefore no mac80211 driver will allow you to use any beaconing mode > (AP | IBSS | Mesh) mode on DFS channels yet. > > Note that not all 5 GHz channels require radar detection though so you > could try using one of the non-DFS channels. Check 'iw list' for that. > > ath9k STA should work with DFS but I didn't work on that myself so > will leave someone else to comment on that. Yep, STA mode should work fine, since 802.11h CSA support was added to mac80211 recently. Sujith -- http://sujith-m.blogspot.com ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ath9k-devel] Radar Detection and DFS status 2009-02-11 21:41 ` [ath9k-devel] Radar Detection and DFS status Luis R. Rodriguez 2009-02-12 2:15 ` Sujith @ 2009-02-12 12:56 ` Alberto Pollastro 2009-02-12 15:53 ` Luis R. Rodriguez 1 sibling, 1 reply; 6+ messages in thread From: Alberto Pollastro @ 2009-02-12 12:56 UTC (permalink / raw) To: Luis R. Rodriguez; +Cc: Michael Green, ath9k-devel, linux-wireless On Wed, Feb 11, 2009 at 10:41 PM, Luis R. Rodriguez <mcgrof@gmail.com> wrote: > > mac80211 or ath9k does not yet have radar detection support so > therefore no mac80211 driver will allow you to use any beaconing mode > (AP | IBSS | Mesh) mode on DFS channels yet. > > Note that not all 5 GHz channels require radar detection though so you > could try using one of the non-DFS channels. Check 'iw list' for that. I've checked in regdb (2009.01.30) an it reports that I can use these frequencies (in Italy): country IT: (2402 - 2482 @ 40), (N/A, 20) (5170 - 5250 @ 40), (N/A, 20) (5250 - 5330 @ 40), (N/A, 20), DFS (5490 - 5710 @ 40), (N/A, 27), DFS I'm not sure, but in Italy the range 5170 - 5250 can be used only indoor. Are indoor/outdoor channels treated differently by mac80211 and/or ath9k? Regarding 802.11h, is its development for beaconing modes scheduled? Thanks, Albert. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ath9k-devel] Radar Detection and DFS status 2009-02-12 12:56 ` Alberto Pollastro @ 2009-02-12 15:53 ` Luis R. Rodriguez 2009-02-12 20:39 ` Alberto Pollastro 0 siblings, 1 reply; 6+ messages in thread From: Luis R. Rodriguez @ 2009-02-12 15:53 UTC (permalink / raw) To: Alberto Pollastro; +Cc: Michael Green, ath9k-devel, linux-wireless On Thu, Feb 12, 2009 at 4:56 AM, Alberto Pollastro <a.pollastro@gmail.com> wrote: > On Wed, Feb 11, 2009 at 10:41 PM, Luis R. Rodriguez <mcgrof@gmail.com> wrote: >> >> mac80211 or ath9k does not yet have radar detection support so >> therefore no mac80211 driver will allow you to use any beaconing mode >> (AP | IBSS | Mesh) mode on DFS channels yet. >> >> Note that not all 5 GHz channels require radar detection though so you >> could try using one of the non-DFS channels. Check 'iw list' for that. > > I've checked in regdb (2009.01.30) an it reports that I can use these > frequencies (in Italy): > > country IT: > (2402 - 2482 @ 40), (N/A, 20) > (5170 - 5250 @ 40), (N/A, 20) > (5250 - 5330 @ 40), (N/A, 20), DFS > (5490 - 5710 @ 40), (N/A, 27), DFS > > I'm not sure, but in Italy the range 5170 - 5250 can be used only > indoor. Are indoor/outdoor channels treated differently by mac80211 > and/or ath9k? Yes, we have indoor and outdoor channel flags. You can supply a patch or provide a reference to the regulatory information you are reading to determine this and we can patch it up. > Regarding 802.11h, is its development for beaconing modes scheduled? I believe this will be worked on but we have no exact schedule. Luis ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ath9k-devel] Radar Detection and DFS status 2009-02-12 15:53 ` Luis R. Rodriguez @ 2009-02-12 20:39 ` Alberto Pollastro 2009-02-12 21:31 ` Luis R. Rodriguez 0 siblings, 1 reply; 6+ messages in thread From: Alberto Pollastro @ 2009-02-12 20:39 UTC (permalink / raw) To: Luis R. Rodriguez; +Cc: Michael Green, ath9k-devel, linux-wireless On Thu, Feb 12, 2009 at 4:53 PM, Luis R. Rodriguez <mcgrof@gmail.com> wrote: > Yes, we have indoor and outdoor channel flags. You can supply a patch > or provide a reference to the regulatory information you are reading > to determine this and we can patch it up. I've read the European Directive 2007/90/EC: http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2007:041:0010:01:EN:HTML I think that the EC directive has been acknowledged by the Italian legislation as reported in the following table at page 28 (it's in Italian, sorry): http://www.comunicazioni.it/binary/min_comunicazioni/piano_nazionale_ripartizione_frequenze/03%20tabella_B.pdf I hope I'm not wrong. Thanks, Albert. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ath9k-devel] Radar Detection and DFS status 2009-02-12 20:39 ` Alberto Pollastro @ 2009-02-12 21:31 ` Luis R. Rodriguez 0 siblings, 0 replies; 6+ messages in thread From: Luis R. Rodriguez @ 2009-02-12 21:31 UTC (permalink / raw) To: Michael Green Cc: Luis R. Rodriguez, ath9k-devel@lists.ath9k.org, linux-wireless@vger.kernel.org, Alberto Pollastro On Thu, Feb 12, 2009 at 12:39:51PM -0800, Alberto Pollastro wrote: > On Thu, Feb 12, 2009 at 4:53 PM, Luis R. Rodriguez <mcgrof@gmail.com> wrote: > > Yes, we have indoor and outdoor channel flags. You can supply a patch > > or provide a reference to the regulatory information you are reading > > to determine this and we can patch it up. > > I've read the European Directive 2007/90/EC: > > http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2007:041:0010:01:EN:HTML > > I think that the EC directive has been acknowledged by the Italian > legislation as reported in the following table at page 28 (it's in > Italian, sorry): > > http://www.comunicazioni.it/binary/min_comunicazioni/piano_nazionale_ripartizione_frequenze/03%20tabella_B.pdf > > I hope I'm not wrong. Thanks the details, Michael, what do you think? Luis ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-02-12 21:32 UTC | newest]
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2009-02-11 21:41 ` [ath9k-devel] Radar Detection and DFS status Luis R. Rodriguez
2009-02-12 2:15 ` Sujith
2009-02-12 12:56 ` Alberto Pollastro
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