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  • From: D Logan <dlogan AT ix.netcom.com>
  • To: Chapel Hill Technology Advisory Committee <chtechcomm AT lists.ibiblio.org>, chtechcomm AT lists.ibiblio.org
  • Subject: Re: [Chtechcomm] Another look at Cost
  • Date: Fri, 3 Mar 2006 17:35:02 -0500 (GMT-05:00)


I would like to make one suggestion - when looking at costs, it is important
to factor in short term (i.e. during initial build-out) and long term (i.e. 1
year+) installation and operating costs in addition to capital costs.

-- Dave Logan

-----Original Message-----
>From: Brian Russell <brussell AT metalab.unc.edu>
>Sent: Mar 3, 2006 11:51 AM
>To: chtechcomm AT lists.ibiblio.org
>Cc: laurineasthom AT hotmail.com
>Subject: [Chtechcomm] Another look at Cost
>
>RE: Cost of Muni WiFi per square mile
>
>http://tinyurl.com/m69fs
>(Copied bellow for convenience)
>
>The bottom line from this article:
>"Given these estimates, in a worst-case scenario a company, neighborhood,
>or municipality will save 25% using open-source, open-architecture systems
>like CUWiN. And, obviously, the cost-savings just go up from there."
>
>-Brian
>
>Crunching Numbers: CUWiN vs. Tropos -- Costs to Wireless 1-square Mile.
>
>I recently read on WiFiNetNews that Tropos Networks has announced it would
>cost $68,000 for the equipment necessary to network one square mile. And a
>lot of folks have been asking me how much it would cost to network a
>square mile using a CUWiN-based system. I recently gave a presentation at
>Open Space Austin on the costs for community networks which gave me a
>reason to pull together some rough estimates.
>
>So here's some numbers for a CUWiN-based system (along with the
>information that went into coming up with these estimates). I would
>strongly encourage Tropos to do likewise and let consumers know how they
>came up with their own cost estimates.
>
>1 square mile = 27,878,400 square feet.
>
>CUWiN's existing network has links as short as about 100 meters, and as
>long as 400 meters (or more). So I've broken down the network cost
>estimates into a "low-", "medium-", and "high-cost" breakdowns to give an
>honest assessment of the potential spread for different geographies.
>Node Coverage Radius Square Feet Covered Nodes Needed Total
>Cost*
>1,000 feet 3,140,000 9 $3150
>500 feet 785,000 36 $12600
>250 feet 196,250 142 $49700
>
>*Notes: Current costs for the equipment CUWiN uses are $350/node. Radii
>are based on connectivity distances between nodes (i.e., coverage area may
>be larger, but these are the effective distances between two nodes in the
>coverage are).
>
>Given these estimates, in a worst-case scenario a company, neighborhood,
>or municipality will save 25% using open-source, open-architecture systems
>like CUWiN. And, obviously, the cost-savings just go up from there.
>
>
> __
> /__\
> \__/
> ||
> ||
> ||
> \__
> \_ Brian C. Russell
> Media Activist
> AudioActivism.org
> PodcasterCon.org
> Yesh.com
> \__
> \__= It's a Mic...
>
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