[ndnSIM] Cancel retransmissions

[Spyridon (Spyros) Mastorakis]

Hi,

the app delay tracer uses this callback to print out the statistics:

https://github.com/named-data-ndnSIM/ndnSIM/blob/master/apps/ndn-consumer.cpp#L241 <https://github.com/named-data-ndnSIM/ndnSIM/blob/master/apps/ndn-consumer.cpp#L241>

So, I guess that you still insert sequence numbers to the std::map structure that specifies the number of retransmissions.

Thanks,

Spyridon (Spyros) Mastorakis
Personal Website: http://cs.ucla.edu/~mastorakis/ <http://cs.ucla.edu/~mastorakis/>
Internet Research Laboratory
Computer Science Department
UCLA

> On Dec 8, 2017, at 12:11 PM, Rajvardhan Deshmukh <rdeshmukh at umass.edu> wrote:
> 
> Hi,
> 
> We couldn't see your email in the mailing list, so we thought of resending it.
> 
> Thanks,
> Raj
> 
> -------- Original Message --------
> Subject: Cancel retransmissions
> Date: 2017-12-05 14:08
> From: Thiago Teixeira <tteixeira at engin.umass.edu>
> To: "ndnsim at lists.cs.ucla.edu" <ndnsim at lists.cs.ucla.edu>
> Cc: Rajvardhan Deshmukh <rdeshmukh at umass.edu>
> 
> 
> 
> Hi,
> 
> We are working on a wireless scenario where we want the consumer
> application, in our case we are using Consumer-Zipf-Mandelbrot, to
> cancel retransmissions. We modified the "ndn-consumer.cpp" according to
> an old post in the mailing list, as follows:
> 
> void
> 
> Consumer::WillSendOutInterest(uint32_t sequenceNumber)
> 
> {
> 
>  /*
> 
>  NS_LOG_DEBUG("Trying to add " << sequenceNumber << " with " <<
> Simulator::Now() << ". already "
> 
>                                << m_seqTimeouts.size() << " items");
> 
>  m_seqTimeouts.insert(SeqTimeout(sequenceNumber, Simulator::Now()));
> 
>  m_seqFullDelay.insert(SeqTimeout(sequenceNumber, Simulator::Now()));
> 
>  */
> 
>  m_seqLastDelay.erase(sequenceNumber);
> 
>  m_seqLastDelay.insert(SeqTimeout(sequenceNumber, Simulator::Now()));
> 
>  m_seqRetxCounts[sequenceNumber]++;
> 
>  m_rtt->SentSeq(SequenceNumber32(sequenceNumber), 1);
> 
> }
> 
> We also commented out the "OnTimeout" method from the same file, below:
> 
> void
> 
> Consumer::OnTimeout(uint32_t sequenceNumber)
> 
> {
> 
>  /*
> 
>  NS_LOG_FUNCTION(sequenceNumber);
> 
>  // std::cout << Simulator::Now () << ", TO: " << sequenceNumber << ",
> current RTO: " <<
> 
>  // m_rtt->RetransmitTimeout ().ToDouble (Time::S) << "s\n";
> 
>  m_rtt->IncreaseMultiplier(); // Double the next RTO
> 
>  m_rtt->SentSeq(SequenceNumber32(sequenceNumber),
> 
>                 1); // make sure to disable RTT calculation for this
> sample
> 
>  m_retxSeqs.insert(sequenceNumber);
> 
>  ScheduleNextPacket();
> 
>  */
> 
> }
> 
> However, we are still getting RetxCount greater than 1 in the
> app-delays-trace file.
> 
> How can we cancel/disable retransmissions?
> 
> Thanks in advance,
> 
> TT
> _______________________________________________
> ndnSIM mailing list
> ndnSIM at lists.cs.ucla.edu
> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim

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