[ndnSIM] Fwd: Delay PIT and CS deletion

Gustavo Gonzalez gonzalezcga at gmail.com
Mon Aug 17 13:05:09 PDT 2015

Hello Spyridon,

First of all thanks for the answer.

I was wondering if the deletion of an entry in the PIT could be modified
for another value different than the lifetime of the last interest
received. I was thinking on a delay of 250ms because I am trying to
simulate a satellite connection but I realize that a same content is issued
two times because of the propagation delay (500ms) and it shouldn't be like
this because the content will be forwarded but due to the large waiting
time for the content then a new interest requesting the same content is

Another question is if it is possible to have two same contents on the
channel at approximately 4s of difference between both of them even when
the first content was delivered succesfully. Is this behaviour because of
the expiration of the interest lifetime that the consumer issues again an
interest requesting the same content?


On Sun, Aug 16, 2015 at 10:57 PM, Spyridon (Spyros) Mastorakis <
spiros.mastorakis at gmail.com> wrote:

> Hi Gustavo,
> the expiration time of a PIT entry is equal to the lifetime of the last
> Interest received. For the CS, this depends on the amount of traffic and
> the replacement policy. When the CS of a router is full, the eviction of a
> CS entry will take place according to the replacement policy.
> For further details about the forwarding process and in general about all
> the NFD-related functionality, you may take a look at the NFD-developer
> guide:
> http://named-data.net/wp-content/uploads/2015/05/ndn-0021-4-nfd-developer-guide.pdf
> Please let me know if you need anything else.
> --
> Spyridon (Spyros) Mastorakis
> Personal Website: http://cs.ucla.edu/~mastorakis/
> Internet Research Laboratory
> PhD Computer Science
> > On Aug 16, 2015, at 1:47 PM, Gustavo Gonzalez <gonzalezcga at gmail.com>
> wrote:
> >
> > Hello,
> >
> > I have a question. How could be modify the deletion time of an entry in
> the PIT and in the CS table? The case would be an interest forwarded that
> will take 500ms to be answered, so I don't want any other interest in the
> air requesting the same content.
> >
> > How this could be done?
> >
> > Regards.
> > _______________________________________________
> > ndnSIM mailing list
> > ndnSIM at lists.cs.ucla.edu
> > http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
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