open 80211s on XO 1.5
ed at laptop.org
Fri Oct 30 15:50:17 EDT 2009
On Oct 30, 2009, at 3:32 PM, Sameer Verma wrote:
> scenarios of a handful of XOs in the under-a-tree model
Under a tree, using mesh networking is pointless (unless, I suppose,
it is an extraordinarily large tree). Mesh networking allows packet
forwarding from node A to node B, where such nodes cannot normally
communicate with one another directly. Packets are forwarded through
node C, visible to both A and B, or through multiple such intermediate
nodes. If A can communicate with B, mesh is neither helpful nor
advisable. It just confuses things, which is the problem we see with
large numbers of children in a classroom. The mesh efforts to keep
track of how to get from A to B can quickly saturate the RF spectrum
with a lot of unhelpful traffic.
I can't tell what it is you're doing at your meetings when your users
"all use mesh". At a typical in-person meeting, you have a number of
people using XOs all in the same room. Any XO in the room can
communicate over WiFi directly with every other machine in the room
(except in extremely unusual circumstances, or too many attendees
wearing their tinfoil hats). There's no need for or value to mesh
network - A doesn't need C to forward packets to B because A can see B
directly as another ad hoc node.
If there's an AP providing routing to the Internet or other external
networks, there's no mesh required there, either, presuming that each
XO can communicate with the AP directly.
I can't answer your question about whether those scenarios use ad hoc
networking because I don't quite see what it is the users are doing in
those scenarios. What (lowercase) activity are users engaged in when
you say they "all use mesh"? What do you think they would be unable
to do if they all stopped using mesh? Thanks for the info.
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