[ndnSIM] SINR packet tag in ndnSIM 2.5

[Spyridon (Spyros) Mastorakis]

Hi Thiago,

did you guys also do something like that:

https://github.com/named-data-ndnSIM/NFD/blob/0a30676920b9d3f2b2c8bc68e583befc415210cc/daemon/face/generic-link-service.cpp#L136 <https://github.com/named-data-ndnSIM/NFD/blob/0a30676920b9d3f2b2c8bc68e583befc415210cc/daemon/face/generic-link-service.cpp#L136>

Other than that, if the geo-tag works for you, then why not following this logic (do not remember how different or similar it is to the the general way of encoding/decoding NDNLP tags)?

Thanks,

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

> On Aug 13, 2018, at 9:31 AM, Thiago Teixeira <tteixeira at umass.edu> wrote:
> 
> Hi all,
>  
> I wonder if you had a chance to look into this issue. 
> Recapping, we
> created a SINR tag (NS-3) in the wifi-phy.cc <http://wifi-phy.cc/>
> created a new TLV and tag (NDNLP) to carry that value
> modified the encoding according to the post <https://lo.calho.st/networks/adding-custom-packet-fields-to-packets-in-ndnsim-2-3-without-forking-the-entire-repository/> Junxiao shared
> read the SINR value in the NDN net-device (thus, the NS-3 tag works) and attach the NDNLP tag to the newly created NFD packet
> read the SINR tag (NDNLP) that is attached to the NFD packet in the forwarding strategy, but the value is zero
>  
> I was looking at the geo-tag <https://github.com/4th-ndn-hackathon/ndnSIM-Mobile-Simulation-Package/commit/c59de9d958ad0aed7bcb37bdc57a46ebe1752b6f> from the 4th Hackathon, and that tag survives this encoding/decoding process. Is this a way worth pursuing?
>  
>  
> Thanks,
> TT
>  
>  
> From: Thiago Teixeira 
> Sent: Tuesday, August 7, 2018 7:24 AM
> To: NdnSIM <ndnSIM at lists.cs.ucla.edu>
> Cc: 'Spyridon (Spyros) Mastorakis' <mastorakis at cs.ucla.edu>; Junxiao Shi <shijunxiao at email.arizona.edu>
> Subject: FW: [ndnSIM] SINR packet tag in ndnSIM 2.5
>  
> Just including the mailing list
>  
> From: Rajvardhan Deshmukh <rdeshmukh at umass.edu <mailto:rdeshmukh at umass.edu>> 
> Sent: Monday, August 6, 2018 4:14 PM
> To: Junxiao Shi <shijunxiao at email.arizona.edu <mailto:shijunxiao at email.arizona.edu>>
> Cc: Thiago Teixeira <tteixeira at umass.edu <mailto:tteixeira at umass.edu>>
> Subject: Re: [ndnSIM] SINR packet tag in ndnSIM 2.5
>  
> Hi Junxiao,
>  
> The error was solved using your suggestion (using the set method).
> But when we try to access this tag in the forwarding strategy, we still get null value:
>  
> Code Snippet #1: (to access tag in forwarding strategy)
>  
>  double sinr = 0.0;
>  auto sinrTag = interest.getTag<lp::SinrTag>();
>  if (sinrTag != nullptr) {
>    sinr =*sinrTag;
>  }
>  
> Output for Snippet #1:
>  
>  sinrTag is nullptr
> --------------------------------------------------------------
> Code Snippet #2: (to set tag in ndn-net-device-transport.cpp <https://github.com/named-data-ndnSIM/ndnSIM/blob/65c490630e1a2e9cdebaf505de8729838c000821/model/ndn-net-device-transport.cpp#L119>)
> 
>  BlockHeader header;
>  packet->RemoveHeader(header);
>  auto nfdPacket = Packet(std::move(header.getBlock()));
> 
>  ::ndn::lp::Packet lpPacket = ::ndn::lp::Packet(nfdPacket.packet);
>  if (sinrValue) {
>    lpPacket.set<lp::SinrTagField>(sinrValue);
>  }
> 
>  this->receive(std::move(nfdPacket));
> -------------------------------------------------------------
>  
> Can you help us set the value for SinrTagField in the ndn-net-device-transport.cpp?
>  
> Thanks,
> Raj

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