On Wed, Feb 8, 2012 at 4:23 AM, Martin Langhoff <[email protected]> wrote: > On Wed, Feb 8, 2012 at 6:16 AM, Sridhar Dhanapalan > <[email protected]> wrote: >> Ad-hoc connections only scale to a limited number of participants >> before problems begin to occur. > > The technically correct answer is "it depends". And it is true, it > depends on a ton of factors. > > As a rule of thumb, I've seen it work for groups of 5~6 units, > physically close and without interference sources or reflective > materials. I would not aim higher than that -- 5~6 units in a channel. > You have 3 channels, so 3 groups of 5~6 units. >
wiki.laptop.org/images/a/a3/Country_Technical_Support.pdf recommends 10 per channel on mesh. Given that 802.11s draft vs ad-hoc is really a layer 2 issue, the numbers should be in that neighborhood? cheers, Sameer > To clarify: keep any other laptops and cordless phones in the vicinity > _off_, to allow these 18 users to work. In practice, it won't work in > a school, but if you invite a few schoolmates home after school, or in > the park, you're fine. > > No warranties expressed or implied. There's a long laundry list of > things that can interfere, and make things not fine. > > For example, professional TV cameras from that friendly news crew > transmit in the 2.4GHz band. That battery pack feeds a powerful > antenna to get the signal back to the van that has the uplink, and it > paves over consumer-grade wifi. > > So don't count in wifi (of any kind!) to work for a demo or > show-and-tell when you get TV coverage at a school :-) > >> Can we impose a hard limit on the number of clients to prevent too >> many XOs connecting to a single ad-hoc session? > > As James says... unfortunately no. > > > > m > -- > [email protected] > [email protected] -- Software Architect - OLPC > - ask interesting questions > - don't get distracted with shiny stuff - working code first > - http://wiki.laptop.org/go/User:Martinlanghoff > _______________________________________________ > Devel mailing list > [email protected] > http://lists.laptop.org/listinfo/devel > _______________________________________________ Devel mailing list [email protected] http://lists.laptop.org/listinfo/devel
