Hi David, On Mon, Apr 23, 2012 at 9:37 AM, David Fulgham <[email protected]> wrote: > We've been playing with the idea of a mobile 802.11s mesh for a while, > since we have a mesh through out an entire community we would like to > be able to use it for voice, etc. The problem is that when a node > moves through the network it leaves remnant of itself throughout the > network. I.e. nodes will attempt to use the mobile node if it > happened to result in the best path to a given destination at some > point in time. We found that the timeouts for path eliminations even > when we reduced the timeouts were not responding to the changes fast > enough.
Establishing a peer link is costlier than establishing a path through the mesh (specially if security is used). For that reason, peer links stay around longer, while paths change more rapidly in response to topology changes. So the fact that you see peer links long after a particular peer has moved away is not necessarily a problem. To test mobility, I would recommend using the simulated device driver mac80211_hwsim. With it you can make and break topologies in real time and see how the 802.11s protocol responds. For instance, one of our regression tests is as follows: 1. Establish a topology like: # 1 - 2... n-2 - n-1 # \------n------/ 2. Ping from 1 to n-1, confirm that traffic flows through n 3. Disconnect n from the network 4. Measure how long until traffic is re-routed through 2-..-n-2 With n=5 we observe a path recovery in less than 0.7 sec. Cheers, Javier > > On Mon, Apr 23, 2012 at 12:29 PM, Yile Ku <[email protected]> wrote: >> I am looking for someone who can answer questions related to: >> 802.11s mobility. Nodes moving relative to one another, how fast routes >> across the mesh converge >> Power control, how to get the maximum amount of power from the cards we are >> using (Mikrotek) >> Parameter configuration for mesh networks. >> >> Thx, >> Y- >> >> >> On Mon, Apr 23, 2012 at 9:45 AM, David Fulgham <[email protected]> >> wrote: >>> >>> We've been deploying 802.11s in a "wide area" network covering roughly >>> 3-4km.sq. and would be available to consult if required. >>> >>> David Fulgham >>> Mnemonics.ca >>> www.mnemonics.ca >>> >>> On Mon, Apr 23, 2012 at 11:00 AM, Yile Ku <[email protected]> wrote: >>> > Anyone besides Cozybit do consulting for 802.11s? I am interested in a >>> > guru >>> > since we need some questions answered quickly and thoroughly. >>> > Y- >>> > >>> > _______________________________________________ >>> > Devel mailing list >>> > [email protected] >>> > http://lists.open80211s.org/cgi-bin/mailman/listinfo/devel >>> > >>> _______________________________________________ >>> Devel mailing list >>> [email protected] >>> http://lists.open80211s.org/cgi-bin/mailman/listinfo/devel >> >> >> >> _______________________________________________ >> Devel mailing list >> [email protected] >> http://lists.open80211s.org/cgi-bin/mailman/listinfo/devel >> > _______________________________________________ > Devel mailing list > [email protected] > http://lists.open80211s.org/cgi-bin/mailman/listinfo/devel -- Javier Cardona cozybit Inc. http://www.cozybit.com _______________________________________________ Devel mailing list [email protected] http://lists.open80211s.org/cgi-bin/mailman/listinfo/devel
