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AirOS » Historique » Version 24

Mehdi Abaakouk, 30/10/2012 18:40

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h1. AirOS
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http://en.wikipedia.org/wiki/List_of_WLAN_channels
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http://wireless.kernel.org/en/developers/Regulatory
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http://wireless.kernel.org/en/developers/Regulatory/Database
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<pre>
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Band [MHz]	Max BW [MHz]	Flags	Max antenna gain [dBi]	Max EIRP [dBm (mW)]
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2402.000 - 2482.000	40.000		N/A	20.00 (100.00) => 80 MHz
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5170.000 - 5250.000	40.000		N/A	20.00 (100.00) => 80 MHz
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5250.000 - 5330.000	40.000	DFS	N/A	20.00 (100.00) => 80 MHz
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5490.000 - 5710.000	40.000	DFS	N/A	27.00 (501.19) => 220 MHz 
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(total 5 GHz 380 MHz, 5600-5650 = radar = 50 MHz)
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</pre>
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http://www.ubnt.com/wiki/RF_Compliance
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For example, if you select  5805 MHz (40 MHz channel) and Below, the radio will use  (5775 to 5795 MHz) + (5795 to 5815 MHz), 
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but if you select   5805 MHz (40 MHz channel) and Above, the radio will use  (5795 to 5815 MHz) + (5815 to 5835 MHz).
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ath9k http://wenku.baidu.com/view/ac0523f57c1cfad6195fa7f4.html
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Ubnt founder: http://www.forbes.com/forbes/2012/0116/entrepreneurs-robert-pera-computer-hardware-apple.html
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h2. v5.3.5
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http://wiki.ubnt.com/AirOS_5.3
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Channel width 5/10/20/40
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TX power min max dBm
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Loco    4  23
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NS      8  27
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NB      4  23
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Rocket  -4 27
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LocoM2 5/10/20/40 dBm 5-23
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h2. Comparaison
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5.3.5 vs 5.5 
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Linux version 2.6.15-5.2 (buildd@builder) (gcc version 4.1.2)  Mon Dec 19 20:46:46 EET 2011  (janvier 2006)
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Linux version 2.6.32.54 (buildd@builder) (gcc version 4.1.2)  Fri Apr 6 14:56:27 EEST 2012 (decembre 2009)
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6842240 May 19 17:07 XM-v5.3.5.build11245.bin
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6472831 May 19 17:07 XM-v5.5.build12536.bin
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h2. v5.5
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http://www.ubnt.com/download#doc
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http://www.ubnt.com/downloads/guides/airOS/airOS_UG_V55_3-20-12.pdf
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Country Compliance Mode Frequency 4920 Mhz a 6100 MHz
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Channel width 3/5/8/10/20/25/30/40
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TX power min max dBm
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Loco    4  23
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NS     -4  27
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NB     -8  23
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Rocket -4  27
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LocoM2 3/5/8/10/20/25/30/40 dBm 5-23 Freq 2312 a 2732 MHz (France 5/8/10/20/30/40 et 2412-2472)
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IPv6 supported in command line ping6 fe80::xxx%br0 works
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h2. Tagger les 2 ports ethernet sur firmware 5.5:
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NB:La NS doit déjà fonctionner sans VLAN en mode bridge.
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Onglet Network:
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-> Configuration Mode: Advanced
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Dans "VLAN Network":
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-> Ajouter le LAN0 avec VLANID 12
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-> Ajouter le LAN1 avec VLANID 12
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Dans "Bridge Network" pour le "Bridge0":
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-> Supprimer LAN0
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-> Supprimer LAN1
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-> Ajouter LAN0.12
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-> Ajouter LAN1.12
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Et appliquer la configuration.
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Voila il reste plus qu'à configurer la machine/router pour utiliser ce vlan.
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Exemple avec linux:
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# ip link add link eth0 name eth0.12 type vlan id 12
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# ip link set eth0.12 up
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# ping6 fe80::31%eth0.12
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PING fe80::31%eth0.12(fe80::31) 56 data bytes
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64 bytes from fe80::31: icmp_seq=1 ttl=64 time=23.5 ms
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^C
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--- fe80::31%eth0.12 ping statistics ---
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1 packets transmitted, 1 received, 0% packet loss, time 0ms
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rtt min/avg/max/mdev = 23.519/23.519/23.519/0.000 ms
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h2. AirView test
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References:
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* http://forum.ubnt.com/showthread.php?t=52560
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* ETSI EN 301 893 v1.7.0 (2012-01)
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* http://www.etsi.org/deliver/etsi_en/301800_301899/301893/01.07.00_40/en_301893v010700o.pdf
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** See diagram page 17 of the ETSI PDF
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Lab on table same room compliance mode 5.5
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- one NSM5 AP WDS
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- one LocoM5 STA WDS 1 meter from the NSM5
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- one NBM5 head (without dish) right in between Loco and NS running AirView
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Steps for each graph
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# associate NS and Loco with new frequency and width
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# clear airview
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# launch 300 second iperf client between netbook behind NSM5 to iperf server on locoM5
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# after iperf is done save airview screenshot
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# go back to step 1
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h3. First batch testing narrow channels 5240 with 5200-5300 airview:
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* 3 MHz
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 !5240-3.png!
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* 5 MHz
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 !5240-5.png!
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* 8 MHz
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 !5240-8.png!
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* 10 MHz
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 !5240-10.png!
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* 20 MHz
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 !5240-20.png!
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h3. Second batch testing large channels 5300 with 5200-5400 airview:
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* no emission to verify noise
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 !5300-0b.png!
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* 10 MHz
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 !5300-10b.png!
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* 20 MHz
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 !5300-20b.png!
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* 30 MHz
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 !5300-30b.png!
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* 40 MHz
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 !5300-40b.png!