Re: HSLS?
Sascha Meinrath <[email protected]>
| Newsgroups | gmane.network.wireless.cu-wireless |
|---|---|
| Message-ID | <[email protected]> |
On Tue, 9 Mar 2004, Todd Boyle wrote: > At 07:43 PM 3/9/2004, David Young wrote: > > You don't really think that we can answer this question, do you? =) > > > Thanks, no of course not, not with any precision! > > But what would be your guess, based on the experience > you've had with the mesh protocols and the senao/soekris > hardware? > > What happens when 3 or 4 nodes on the network > simultaneously try to move big files on this network? Well, one of our networks has had 6 nodes and a bunch of regular users on it for a year now. Several of the users are rather heavy users. I've never noticed any crash, but have occassionally seen the bandwidth diminish. Our main bottleneck is the DSL line connecting the network to the internet -- I suspect that if we had a T1 or the like that this would still be the case. Since 802.11 handles collisions by having each node wait a random interval before resending, I think that even with a dozen or more nodes, the bottleneck will still be the connection speed to the internet. However, the current software will not scale well to scores and scores of nodes -- which is why we're working on this problem over the next year. ETX will help, having multiple connection points will help, using radios where we can automatically set transmit power will help, etc. Either way, you probably won't see much of a problem until you get many users on the network (unless you happen to have access to a T3 or something and want that sort of speed ;). --Sascha > http://www.cuwireless.net/images/wirelessmap.jpg > Not asking for the worst case scenario but really, > the scenario you'd almost expect, from bandwidth > hungry users in the evening time.. > Would the throughput > 1. crash to zero? > 2. scale down gracefully? > 3. become sporadic, randomly, i.e. this is what > my instincts tell me, but that's based on Internet > and office LANs when they get overloaded.. > there would be unpredictable latency > > Just looking for your guess, ol boy. You know your > gear by now... overall, do we get 100Kbps in this situation, > or 500kbps or 1Mbps? > > Many thanks > Todd > -- Sascha Meinrath Project Manager & President * Project Manager Acorn Active Media Foundation *** Eggplant Active Media www.acornactivemedia.com * www.eggplantmedia.com _______________________________________________ CU-Wireless mailing list [email protected] http://lists.cu.groogroo.com/cgi-bin/listinfo/cu-wireless Project Page: http://cuwireless.ucimc.org