Folks -
Thanks for getting the discussion rolling. Although it may be obvious, I want
to point out one aspect of OLPC's mesh needs that has complicated matters.
Our XO laptops are used at home, in a sparse network environment, and at
school, in a dense network environment, and all levels of
Hi Reuben,
Consider the benefits of using open source software versus our
closed source firmware and partnering with communities like
Freifunk whose network is ~ 800 node, guifi.net is almost 10k
nodes in Barcelona, Athens Wireless is 5k nodes.
The fact that a custom mesh
On 08/24/2010 10:13 AM, Reuben K. Caron wrote:
Consider the benefits of using open source software versus our closed
source firmware and partnering with communities like Freifunk whose
network is ~ 800 node, guifi.net is almost 10k nodes in Barcelona,
Athens Wireless is 5k nodes.
The
On Aug 24, 2010, at 10:26 AM, Chris Ball wrote:
The fact that a custom mesh algorithm would have to run on the CPU --
prohibiting any kind of idle-suspend -- makes it a non-starter for an
XO deployment in my eyes. Did you have any thoughts on this?
Hi Chris,
Great point. Thank you for
In those scenarios we run into RF density issues even when using APs.
I would think that under a close proximity scenario like this one we
would want to reduce the power level of the wlan cards so they are
operating in a much smaller space. Theoretically if kids are spaced
out in a normal
On Aug 24, 2010, at 11:24 AM, Richard A. Smith wrote:
On 08/24/2010 10:13 AM, Reuben K. Caron wrote:
Consider the benefits of using open source software versus our
closed
source firmware and partnering with communities like Freifunk whose
network is ~ 800 node, guifi.net is almost 10k
On 08/24/2010 11:39 AM, L. Aaron Kaplan wrote:
On Aug 24, 2010, at 5:24 PM, Richard A. Smith wrote:
On 08/24/2010 10:13 AM, Reuben K. Caron wrote:
Consider the benefits of using open source software versus our
closed source firmware and partnering with communities like
Freifunk whose
On 08/24/2010 11:44 AM, Reuben K. Caron wrote:
From what I understand, OLSR has a better mechanism for maintaining the
mesh information. If you recall any change in mesh was previously
broadcasted to all listeners. OLSR is configurable. For instance,
information would only be broadcasted to
On Aug 24, 2010, at 12:08 PM, Richard A. Smith wrote:
I'm not talking about comparison to our previous mesh.
Thanks keeping me on track.
I'm talking about comparison to an AP. Overall we currently don't
have much need for mesh as most of our scenarios are a dense cloud
of children in
On 08/24/2010 11:45 AM, L. Aaron Kaplan wrote:
On Aug 24, 2010, at 5:24 PM, Richard A. Smith wrote:
On 08/24/2010 10:13 AM, Reuben K. Caron wrote:
Consider the benefits of using open source software versus our closed
source firmware and partnering with communities like Freifunk whose
On 08/24/2010 12:11 PM, L. Aaron Kaplan wrote:
The largest of our mesh problems did not have to do with
scalability on sheer number of nodes but rather scalability in
density. Is there any information available on how these networks
perform when there are 50 - 100 of them next all in the
On Aug 24, 2010, at 11:24 AM, Richard A. Smith wrote:
The largest of our mesh problems did not have to do with scalability
on sheer number of nodes but rather scalability in density. Is
there any information available on how these networks perform when
there are 50 - 100 of them next
On 08/24/2010 01:01 PM, L. Aaron Kaplan wrote:
Well - the issue is IMHO that OLPC always sold the public on the mesh
idea. So it is somewhat of a bummer that the mesh is gone now.
Let me re-phrase what I said before all the rumors start to fly and I
get in trouble. The idea of mesh is
On Aug 24, 2010, at 1:29 PM, L. Aaron Kaplan wrote:
Hm well, you at least got me thinking how we can make a small
dense indoor mesh working without APs interesting challenge.
Like think about replacing those smart APs by a distributed version.
Interesting...
a.
Maybe a
On 08/24/2010 01:11 PM, Reuben K. Caron wrote:
http://dev.laptop.org/~reuben/Elsevier2008_OLSR_compare.pdf
This differs from most other papers that I have read that use
theoretical simulations.
Thank you. That's the sort of data I'm talking about. Unfortunately,
its not quite real world
On Aug 24, 2010, at 1:34 PM, Richard A. Smith wrote:
They are only able to achieve this with 30dB attenuators on the
signal. We would want to see what one can do with stock cards
without an attenuator.
Can we adaptively get the signal down in driver/software?
On 08/24/2010 01:43 PM, Reuben K. Caron wrote:
On Aug 24, 2010, at 1:34 PM, Richard A. Smith wrote:
They are only able to achieve this with 30dB attenuators on the
signal. We would want to see what one can do with stock cards without
an attenuator.
Can we adaptively get the signal down in
On Aug 24, 2010, at 5:24 PM, Richard A. Smith wrote:
On 08/24/2010 10:13 AM, Reuben K. Caron wrote:
Consider the benefits of using open source software versus our closed
source firmware and partnering with communities like Freifunk whose
network is ~ 800 node, guifi.net is almost 10k
On Aug 24, 2010, at 5:24 PM, Richard A. Smith wrote:
On 08/24/2010 10:13 AM, Reuben K. Caron wrote:
Consider the benefits of using open source software versus our closed
source firmware and partnering with communities like Freifunk whose
network is ~ 800 node, guifi.net is almost 10k
The largest of our mesh problems did not have to do with
scalability on sheer number of nodes but rather scalability in
density. Is there any information available on how these networks
perform when there are 50 - 100 of them next all in the same room
or in adjacent rooms?
Yes! And the
(...)
BTW Richard, as far as I remember the problems with 802.11s seemed to be:
1) the standard is not a standard and it was intentionally crippled
2) the drivers were very b0rked and broken (and Marvel did a terrible job
with the driver software)
Scalability to less than 30 laptops
On Aug 24, 2010, at 7:11 PM, Reuben K. Caron wrote:
On Aug 24, 2010, at 11:24 AM, Richard A. Smith wrote:
The largest of our mesh problems did not have to do with scalability on
sheer number of nodes but rather scalability in density. Is there any
information available on how these
On Aug 24, 2010, at 7:20 PM, Richard A. Smith wrote:
On 08/24/2010 01:01 PM, L. Aaron Kaplan wrote:
Well - the issue is IMHO that OLPC always sold the public on the mesh
idea. So it is somewhat of a bummer that the mesh is gone now.
Let me re-phrase what I said before all the rumors
On Aug 24, 2010, at 7:32 PM, Reuben K. Caron wrote:
On Aug 24, 2010, at 1:29 PM, L. Aaron Kaplan wrote:
Hm well, you at least got me thinking how we can make a small dense
indoor mesh working without APs interesting challenge. Like think about
replacing those smart APs by a
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