[ndnSIM] SINR packet tag in ndnSIM 2.5

Spyridon (Spyros) Mastorakis mastorakis at cs.ucla.edu
Mon Jul 23 18:42:32 PDT 2018

Hi Thiago,

I think we have converted our NS-3 tags to NDN Link Protocol (LP) tags. For more details, take a look at these commits (HopCount tag):

https://github.com/named-data-ndnSIM/NFD/commit/3bebd1190b1c45f8acaa0fe1d3a3100651a062e4 <https://github.com/named-data-ndnSIM/NFD/commit/3bebd1190b1c45f8acaa0fe1d3a3100651a062e4>
https://github.com/named-data-ndnSIM/ndn-cxx/commit/e1ae096efd8ad503ce7dbd616ee174afaed6c66b <https://github.com/named-data-ndnSIM/ndn-cxx/commit/e1ae096efd8ad503ce7dbd616ee174afaed6c66b>


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

> On Jul 23, 2018, at 2:52 PM, Thiago Teixeira <tteixeira at umass.edu> wrote:
> Hi all,
> We added a SINR packet tag in the src/wifi/model/wifi-phy.cc <https://github.com/named-data-ndnSIM/ns-3-dev/blob/ndnSIM-v2.5/src/wifi/model/wifi-phy.cc#L2541> EndReceive() method using the following snippet:
>   SnrTag tag;
>   tag.Set(signalNoise.signal - signalNoise.noise);
>   if (! packet->PeekPacketTag (tag)){
>      packet->AddPacketTag (tag);
>   }
> The implementation of the SINR packet tag is available at src/wifi/model/snr-tag.cc <https://github.com/named-data-ndnSIM/ns-3-dev/blob/ndnSIM-v2.5/src/wifi/model/snr-tag.cc>.
> We would like to get the value of the tag in the forwarding strategy. Before ndnSIM 2.3, we could just use something like this:
>   SnrTag tag;
>   Ptr<Packet> payload = ConstCast<Packet>(interest->GetPayload());
>   payload->PeekPacketTag (tag);
> but in ndnSIM 2.5 we could not find an equivalent method. I think we need to convert the SINR tag to type ns3::ndn::ns3PacketTag, is that correct?
> Can you assist please?
> Thanks,
> Thiago
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