Allen,
It sounds as if you might be proposing this for a suburban or even
tree filled urban environment. One problem you might run into is
clear spectrum in 900MHz. I've use Trango gear out in rural areas,
where it works OK. I've only done a few scans in the city (East
Lansing and Lansing, specifically). Both of those scans were so
depressing I never tried making any links with 900 in town. All the
channels were what the Trango manual calls "unsuitable".
I have a few of the SR9 cards and am just starting to work with them.
I read somewhere that Trango (for example) rejects interference
better than the SR9. No personal experience one way or another yet.
My new rule of thumb with Trango is that I can go 2 miles. This is
with AP's at 80 - 130' AGL, pretty flat ground, but quite a few
trees. However, I have been struggling to make a link that is only
one mile, unfortunately the path follows a heavily wooded riverbed.
So you just never know. I think I've solved this connection by
relaying off the house next door (tenth of a mile closer, but with an
open field for 1/4 mile toward the AP). But I did notice that there
is heavy noise at the relay house in what Trango calls channel 2.
Noise level about -67. No idea what is doing that.
You might consider a modified mesh structure that uses 2.4 or 5GHz
(or even 900 after testing) to those few LOS houses, then something
like Meraki mesh to connect close neighbors.
Otherwise, I think your idea is great, if you could get clear
spectrum. :-)
On September 10, at 12:16 PM September 10, Allen Marsalis wrote:
Please imagine a muni wireless mesh network that utilizes 900MHz
cards instead of 5.8 and 2.4 cards. Instead of nodes being 1000
feet apart atop light poles, they are now spread 1 or 2 miles
apart. Instead of it taking 15 or 20 nodes to cover one square
mile, perhaps one node could cover 1 to 4 square miles. Could this
be a solution for wooded areas with low to moderate population
densities? In other words, do you know anyone who has ever built a
mesh network using SR9s and SBCs with multiple radios to achieve
redundancy and ubiquitous coverage for small towns in the
Southeast? And using no towers by the way, LOL? As I see it, the
SR9 has 4 non-overlapping channels at 5MHz each. Thats all I need.
(I think)
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