[ndnSIM] segmentation

[Alex Afanasyev]

Hi Masri,

You're seeing the correct behavior.  The consumer application explicitly requests (as it is done in majority cases in NDN) specific Data packets, which can be interpreted as a part of a large content.

Another small comment.  None of the implemented consumer applications in ndnSIM wait for the arrival of Data before sending another Interest.  Instead, the number of sent interest is controlled either by rate (ConsumerCbr) or "outstanding Interest window" (ConsumerWindow).

---
Alex

On Nov 12, 2013, at 9:54 PM, nor masri sahri <masri.sahri at gmail.com> wrote:

> hi alex and all,
> correct me if i am wrong about my interpretation.
> from the example file (ndn-simple.cc), i just did simple rule to set maximum number of prefix to be requested (i set to max = 200) to see how it works.(assuming the size of /prefix name file is consist of 200 segment)
> 
> 1. consumer send interest for data name /prefix
> 2. Producer will reply /prefix 0 (part or chunk or segment of /prefix named file)
> 3. when consumer receive /prefix 0, consumer will send another interest for the same file name (/prefix) 
> 4. producer will reply /prefix 1 since that is the sequence number for the complete named data of /prefix
> 
> im quite confused when i see the ns log file
> 
> 0s 0 ndn.Consumer:SendPacket()
> 0s 0 ndn.Consumer:SendPacket(): [INFO ] > Interest for 0
> 0s 0 ndn.Consumer:WillSendOutInterest(): [DEBUG] Trying to add 0 with +0.0ns. already 0 items
> 0.020496s 2 ndn.Producer:OnInterest(0x8c01308, 0x8c0db70)
> 0.020496s 2 ndn.Producer:OnInterest(): [INFO ] node(2) respodning with Data: /prefix/%00
> 0.057472s 0 ndn.Consumer:OnData(0x8c00d38, 0x8c0d260)
> 0.057472s 0 ndn.Consumer:OnData(): [INFO ] < DATA for 0
> 0.1s 0 ndn.Consumer:SendPacket()
> 0.1s 0 ndn.Consumer:SendPacket(): [INFO ] > Interest for 1
> 0.1s 0 ndn.Consumer:WillSendOutInterest(): [DEBUG] Trying to add 1 with +100000000.0ns. already 0 items
> 0.120512s 2 ndn.Producer:OnInterest(0x8c01308, 0x8c0f7f0)
> 0.120512s 2 ndn.Producer:OnInterest(): [INFO ] node(2) respodning with Data: /prefix/%00%01
> 0.157504s 0 ndn.Consumer:OnData(0x8c00d38, 0x8c0f5b0)
> 0.157504s 0 ndn.Consumer:OnData(): [INFO ] < DATA for 1
> 
> Is Consumer request specifically for /prefix 0 at the first time and when he get the data, the consumer send another interest for next data which is /prefix 1?
> 
> In this scenario, it is presumed that the size of /prefix is max 200 segment.
> 
> 
> Sorry about my question, little confused. 
> 
> I am planning to do research on window on NDNsim. Need advice. Many thanks
> 
> 
> 
> -- 
> Regards,
> 
> masri.sahri
> 
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