Dear all, I've just stumbled across another peer-reviewed experimental evaluation of our favourite routing protocols. I haven't found an authoritative bibliographic entry (do the authors perhaps not want to be cited?), so the following should be taken with a pinch of salt:
David Murray, Michael Dixon and Terry Koziniec. An Experimental Comparison of Routing Protocols in Multi Hop Ad Hoc Networks. In Proc. ATNAC 2010. 2010. You'll find a copy online on http://bridgingthelayers.org/docs/murray_routing.pdf I rather liked this paper. The introduction indicates that the authors actually know what they're speaking about -- I've only found two claims that I didn't agree with (that CPU time is a limiting factor on modern embedded systems, and that BATMAN is ``a new and different approach'' -- I think of it as a variant on the distance-vector theme). They actually tested OLSR-ETX, which is the right choice according to Aaron et al, although they call it OLSR in the paper. There's also an interesting discussion of the L2 vs. L3 issue. The meat is on pages 5 and 6. A few choice quotes: * ``Results varied for the different topologies however all packet delivery ratios were between 99.6% and 99.98%.'' (This confirms our results from WBMv2 -- all of our routing protocols work.) * ``The results of the bandwidth tests, shown in Fig 3, reveal that the Babel routing protocol provided better throughputs than OLSR, BATMAN L3 or BATMAN L2.'' (This is surprising -- I'd expect everyone to have roughly the same bandwidth -- and I think it might be an artefact of the way Babel measures packet loss, using piggy-backed Hellos.) * ``OLSR transfers the greatest number of bytes of routing protocol overhead. Comparatively, Babel produces a minuscule overhead. [...] It is evident that BATMAN transmits the largest number of routing packets/frames.'' (Since they used rather good, stable links, Babel's route request mechanism never triggered. This is unlike WBMv2, where the horribly bad routes we were measuring with caused nodes to oscillate in and out of range, which is Babel's worst case.) Juliusz _______________________________________________ Babel-users mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/babel-users
