Re: [B.A.T.M.A.N.] batman goes looping...

Given the DV nature of Batman, current strict dropping policy seems to make sense, because sending known OGMs (as suggested) does introduce significant overhead but does not propagate so much new information. In addition, loosing the dropping policy may introduce new problems which might not be easily predictable at this moment, e.g., stability, looping (propagating stale information within the network might cause even more nasty looping problems). Another way (and maybe simpler ) to fix the problem: instead of loosing the OGM dropping policy, loosing the echo cancellation policy. It is a very simple fix: in addition to the usual echo cancellation process, I also check the TQ value contained in the echoed OGM. This TQ is announced by the neighbor that broadcasts this echo. If this TQ is worse than my current TQ estimation towards that neighbor, I update the estimation with this TQ. Does that make sense? Regards, Yang |------------> | From: | |------------> |Marek Lindner <lindner_marek(a)yahoo.de> | |------------> | To: | |------------> |"The list for a Better Approach To Mobile Ad-hoc Networking" <b.a.t.m.a.n(a)lists.open-mesh.net> | |------------> | Date: | |------------> |11.08.2009 18:44 | |------------> | Subject: | |------------> |Re: [B.A.T.M.A.N.] batman goes looping... | |------------> | Sent by: | |------------> |b.a.t.m.a.n-bounces(a)lists.open-mesh.net | On Monday 10 August 2009 16:16:49 Marek Lindner wrote: that I inspected the code for behaviour in the case you outlined. I think our dropping policy might be a bit too strict. I suggest the following behaviour: * New OGMs are processed and rebroadcasted as usual. * Known OGMs (the sequence number is not new but we did not hear this sequence number via that neighbor) are processed and rebroadcasted as well. * Duplicates (known sequence number via a neighbor that sent us this sequence number before are dropped. Objections / ideas ? Regards, Marek _______________________________________________ B.A.T.M.A.N mailing list B.A.T.M.A.N(a)lists.open-mesh.net https://lists.open-mesh.net/mm/listinfo/b.a.t.m.a.n