[Battlemesh] recommendations for 40Km Link
dave.taht at gmail.com
Mon Mar 24 04:12:37 CET 2014
On Mar 22, 2014 9:25 PM, "Nicolás Echániz" <nicoechaniz at altermundi.net>
> El 04/07/13 05:00, Joseph Bonicioli escribió:
> > Links of that distance are very common in our network (AWMN). Attika in
> > Greece is not flat resulting to many links that are over 10 20 or even
> > Moreover since we got access to TV channel installations we have a lot
> > long distance links to other areas of Greece and with other wireless
> > communities . It will be pointless to point some out. They are many and
> > own a couple of them.
> > Do not over analyze. Maths never fail you (FSL calculations) and rocket
> > dishes are fine for 40Km. With 34dbi dishes at both ends you will get
> > signal with no Tx power at all. If you add 5-10db Tx power you will be
> > in the good performance zone of -61 to -66.
> > If you are in a noiseless environment you will be thrilled to find that
> > performance will be "just" as good as in your test room.
> > You can also find cheaper alternatives. Get yourself a couple of good
> > reliable 120cm offset dishes, a couple of feeders that we can provide
> > you need to and you are ready.
> > On the other hand don't consider anything less than the biggest gain
> > (biggest dishes) and most reliable hardware you can get. You will have
> > compensate for bad weather in the winter making the link harder due to
> > conditions, harsh environment may punish hard you equipment and of
> > unreliable hardware/software will make you travel a lot. The difference
> > between some extra cash for something a bit more reliable and traveling
> > expenses is big.
> > And don't worry about details like alignment. Those things nowadays if
> > have not broken something in your equipment are a breeze with the tools
> > you get.
> > Plan for other details if you are going somewhere far or on a mountain.
> > Cables, extra tools, insulation material, things that make your life
> > experience pleasurable, communication equipment, ropes, toolboxes,
> > Go play, take some pictures and let us know the results! Good luck!!!!
> We finally got around to finishing our first long distance (50Km) link
> and it's working great.
> Thanks joseph for the hints and optimism :)
> We published a small blog post (in spanish and english):
> with some details on link conditions, quality and photos.
I am impressed. Was the link really 50 Mbit in both directions
simultaneously? Are you using airos or OpenWrt?
Got Bufferbloat? What does a rrul test look like? (See netperf-wrappers)
How well does it work in rain?
> > -----Original Message-----
> > From: battlemesh-bounces at ml.ninux.org
> > [mailto:battlemesh-bounces at ml.ninux.org] On Behalf Of NicoEchaniz
> > Sent: Monday, June 17, 2013 4:41 AM
> > To: Battle of the Mesh Mailing List
> > Subject: [Battlemesh] recommendations for 40Km Link
> > Hi guys,
> > Here in Quintana (Argentina) we are planning a 40Km link to connect
> > community networks in the region to the nearest Internet Exchange in
> > City.
> > Our longest link so far is 16Km and it works very well (40Mbps) using
> > AirGrid M5 27dbi.
> > For this occasion we are planning to use Ubiquiti Rocket M5 + 34dbi
> > There is clear LOS between both ends; link calculation seems fine but
> > like to ask about your experience with this kind of long shot high
> > performance links.
> > Any recommendations based on real-world deployments?
> > Are you using these Rocket routers for long links?
> > Cheers,
> > Nico
> Battlemesh mailing list
> Battlemesh at ml.ninux.org
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