[ndnSIM] Events randomization

Igor igorcompuff at gmail.com
Sun Mar 24 20:20:04 PDT 2013

Thank you Alex.

2013/3/22 Alex Afanasyev <cawka1 at gmail.com>

> Hi Igor,
> RngRun parameter would not help much in this case, as you have
> topology-defined timings (link propagation delays) that deterministically
> define which node receives an interest/replies with data first, resulting
> in "stable" selection of the packet.
> To solve the "problem", you would need somehow to introduce randomness in
> your scenario.   For example, you can make a new Producer app
> implementation that instead of immediate reply for the Interest, will
> schedule this reply within a short random period of time.   Another, more
> straightforward, opportunity would be to randomize link delays to different
> producers, which would approximately correspond to different volumes of
> cross traffic.
> ---
> Alex
> On Mar 21, 2013, at 4:43 PM, Igor <igorcompuff at gmail.com> wrote:
> > Hi Alex,
> >
> > I'm not sure if my doubt concerns properly to NDNSim or to the NS3
> simulator, but if you could help me it would be great. I'm working with a
> simple topology where 2 publishers and 1 consumer are connected together
> through a router. All the nodes have the ndn stack installed. Both
> publishers are able to serve all the contents that the consumer asks. For
> the forwarding strategy I am using Flooding. Once the consumer asks a
> content, both the producers receive an interest and respond with a content
> object. Both the content objects get the router at the same time, but,
> obviously, just one of them satisfies the pending interest and is forwarded
> to the next hop. The problem is that the router always select the content
> object that came from the same publisher. Such a predictable behavior do
> not sounds good for me and I would like to insert some randomness to this
> process. I have already tried to change the "RngRun" parameter but the
> results were the same and  now I am stuck with this problem.
> >
> > I thank you in advance.
> >
> > Best Regards,
> >
> > Igor Ribeiro.
> > _______________________________________________
> > ndnSIM mailing list
> > ndnSIM at lists.cs.ucla.edu
> > http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
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