[hackerspaces] Mesh network specs

Eric Stein toba at des.truct.org
Mon Dec 26 20:12:33 CET 2011

unlicensed band = don't contact the FCC because it is definitely none of their business.

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> ObDisclaimer: I'm one of the developers of Project Byzantium.
> > I am looking to build a mesh network in chicago, The way we are
> > planning to do it is, we have an uplink set up in a datacenter
> > downtown with a 100mbit connection, and a place for the antenna on
> > the building that will go across the street to the 1st hop, which
> > will then have several point to point links to the greater mesh
> > network. So the plan is
> That sounds like a good first draft of your backhaul.   Good.
> > primarily to have many meshes, probably about 20, each with ~8
> > wireless
> When you say 'mesh', do you mean a true peer-to-peer wireless mesh, or
> are you using 'mesh' to describe your architecture of backhauls and
> access point for clients?   What mesh routing protocol are you
> considering using?   Which have you tried deploying?   What is the
> hardware and software of your expected client base?
> > routers, which are connected via point to point bridges. None of
> > this is commercial, so we will not be worrying about things like
> > zoning fr the antennas since they will all be on private
> > properties. My question is,
> I've heard it said that perhaps you should contact the FFC to see what
> they think of this because they may take a negative interest in your
> repurposing bits of the consumer unlicensed spectrum for a project of
> this size.
> > does this sound like a good plan, and if so, what specific
> > hardware should be looking to use ?
> That's going to be a difficult question to answer because much of our
> work has to do with repurposing and modifying off-the-shelf equipment.
> What I can say is that wok-fi (https://en.wikipedia.org/wiki/WokFi)
> works pretty well for long-haul links between nodes.   You should
> probably consider mounting your antennae under overhangs of some kind
> to give them some protection from the elements.   If you can hide a
> whole node's hardware under an overhang to protect it from rain and
> snow, so much the better.
> What are your power requirements looking like?   How do you plan on
> powering individual nodes?
> > Please be specific as in technically specific (5ghz 16.5dbi yagi 
> > antenna) or list the manufacturer/link to hardware that is being
> > suggested.
> I don't want to assume, but my guess would be that you're going to use
> 802.11g links for your backhaul?   Are you going to encrypt the
> backhauls or not?
> - -- 
> The Doctor [412/724/301/703]
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