On Thu, Oct 22, 2009 at 03:03, Daniel Drake <d...@laptop.org> wrote: > 2009/10/22 Martin Langhoff <martin.langh...@gmail.com>: >> They are -- but it's pretty awkward to activate. I am arguing that >> ad-hoc networking with a preset ESSID, and Salut should be the >> transparent fallback. Just like the mesh was on earlier releases. > > We already discussed this a lot in another thread. It should not be > automatic. The thread is titled "[Sugar-devel] [Design] Ad-hoc > networks - New Icons" > > The biggest headache about mesh is the cases where it sort-of-works, > but not quite. Ad-hoc networking will be considerably less reliable > than mesh was, for a few reasons: > > 1. In the mesh, everyone does their own beaconing. Sounds horrible but > it actually works. > In ad-hoc, there is just one beacon master. Due to cheap radios and > interference etc, the beacon master will switch around frequently > causing frequent network splits and communication failures. > > > 2. This kind of situation will happen frequently: > > A <-----> B <-----> C > > B can see both users A and C on his network view. A can only see B, > and C can only see B. > B shares an activity. Both A and C join. However, anything done by A > cannot be seen by C and vice-versa, because they are too far apart. > > > 3. Another nasty situation > > A -------------------------- B > > A and B are outside of radio range, but are both setup to start an > automatic network named "olpc" > So they both setup their own ad-hoc networks, both becoming beacon masters. > > Another laptop "C" comes along > A <--------> C <----------> B > This laptop can see both of these independent laptops (each having its > independent network). It can join one or the other. It cannot join > both. Hence this XO can only communicate with A or B, but not both > (even though the range is OK), and presenting this choice in the UI > would be nasty. > > > Ad-hoc will work well for the cases where the children get together in > a small space and explicitly create a throwaway network. If it is > created automatically, I predict we will just get an unreliable mess.
What would be more reliable in the under a tree use case: ad-hoc or mesh with a max of 1 hop? Thanks, Tomeu -- «Sugar Labs is anyone who participates in improving and using Sugar. What Sugar Labs does is determined by the participants.» - David Farning _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
