[hackerspaces] Mesh network specs

[Stewart Dickson]

At the MakerSpace-Urbana, we hold a weekly Mesh-Wifi Reading Group 
Thursdays from 7-9PM
(Central Time), where we discuss the book, "Wireless in the Developing 
World"
http://wndw.net   Where the "Developing World" can be whatever corner of 
the world you
wish to develop -- Your own back yard in Urbana, IL or Detroit, MI, for 
example.

Free download:  http://wndw.net/download.html

"The goal of the WNDW project is to help everyone get the resources they 
need to build wireless networks that solve real communication problems."

See also: The WNDW wiki http://wiki.wndw.net
WirelessU.org, an online repository for training materials
http://wirelessu.org

Cheers,

-Stewart

On 12/26/11 1:12 PM, Eric Stein wrote:
>
> 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]
> >
> > PGP: 0x807B17C1 / 7960 1CDC 85C9 0B63 8D9F  DD89 3BD8 FF2B 807B 17C1
> > WWW: https://drwho.virtadpt.net/
> >
> > "Apathy is suicide and we will bear the blame!" --Psykosonik
> >
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