NLOS?

[gabrieled07]

Has anyone tried Ubnt in NLOS scenarios?

[WHT]

Define NLOS? A little bit of foliage or a hill in between?

[cschwemin]

this is agood question. id like to know also (Foliage)

[WHT]

Foliage will tip 5.8 Gig faster than I can tip a cow over on its back (which is 6.25 seconds BTW).

2.4 gig is allergic to foliage, but 900 Meg has a little better penetration.

But 900 Meg need a pretty wide Fresnel clearance compared to 5.8 Gig.

On the other hand, 5.8 Gig can bend around a corner better than 900. But that's not a substitute for a lack of line of sight.

[Oliver]

Hey WHT,

I'm cutting through a single line of trees at 5.8GHz. But that's with PS5's just 1 mile apart. During winter it works great, but during summer, with the leaves on, they sometimes manage just barely. It can be done, under the right circumstances. Sometimes you just need a bigger cow. ;-)


Grtz,

Oliver

[WHT]

I bet you city boiz think I'm making this all up about cow tipping...

600 pounds here:

http://whtonline.com/twodogsfarm/2006_FW-Rodeo_chute-dogging-event/Sun_dogging_down.jpg

[oneofthefew]

what you have to bare in mind is that trees can attenuate the signal anywhere from 10-50dB per tree (based on tree type and density and frequency used)

also take into consideration that if you are deploying radios in NLOS conditions you should always consider using an 802.11n/MIMO radio

make sure you do the link budget prior to any installation, you can also factor in exponentials values like trees etc. at this point

hope this helps

:D

[caboteur]

I'm a fan of multi-polarized antenna for tree penetration. I have a 9 km nlos( link with two mp 17dbi 2.4g antenna with bullet 2 attached to it and get -65 , ccq 98-100% and 15 meg of trhpt. Some people can't believe that I remplaced my two Motorola Canopy 900mhz backhaul units for Ubiquiti and get much better speed. I think there is only wi-fi plus who build this kind of amazing antenna.

[WHT]

Wi-fi plus makes that "geo-spatial, multi-polarized, dual band, non line of sight (NLOS) antenna".

http://forum.ubnt.com/forum/viewtopic.php?t=7022

[techacq]

Yes, search me, been there right now doing that tomorrow and for the next year, two new sites per week.
But do not think it is easy or always achievable - it is not a casual achievement.

[kilos]

AP located in black dot area on a small hill, present AP will be re-located to the small mountain
Distance 1.6km
Signal Strength: -64 dBm
Tx/Rx Rate: 243/243 Mb/s
http://www.midafricam.co.za/images/wireless/nlos1.jpg

[WHT]

Hey WHT,

I'm cutting through a single line of trees at 5.8GHz. But that's with PS5's just 1 mile apart. During winter it works great, but during summer, with the leaves on, they sometimes manage just barely. It can be done, under the right circumstances. Sometimes you just need a bigger cow. ;-)

I agree, you can get by with a little bit of tree line with short links and high gain antenna, but not to the point that I'd suggest it as common practice.



I bet you city boiz think I'm making this all up about cow tipping...

600 pounds here:

http://whtonline.com/twodogsfarm/2006_FW-Rodeo_chute-dogging-event/Sun_dogging_down.jpg

[joseph521]

i have one that clips the top of a oak tree about a mile from the cpe the distance is about 4 mi using a pico2 with a pigtail to a 9 dbi sector 120 deg to a pico with a pigtail to a pac wireless directional antenna