Can NS3 achieve simulation like file transmission?

[dea...@gmail.com]

Hello everyone!

I'm a fresh new student in NS3, and I'm working on something related to file transmission, so I'm curious if NS3 can be used to simulate the real file transmission(use TCP or UDP)?

I mean, the file is sent from one node to another node, and the other node can decode the file, or print it out?

Thanks!

Best regards!

Dean

[Konstantinos]

Hi Dean,

Yes you can do such a transmission. 

Packets generated in NS-3 may be 'dummy' meaning that they only have a predefined size but no actual payload, or 'real' where the payload is generated from some buffer. 

You can create a custom application (client/server) to read a file to a buffer, generate packets from that buffer, send them using TCP or UDP sockets, and then at the server side read the buffers, append the content to a buffer and hence reconstructing the original file.

Some useful information from NS-3 documentation about creating packets with real data and creating new applications.

https://www.nsnam.org/support/faq/miscellaneous/#Putting_real_bytes_in_the_payload

https://www.nsnam.org/wiki/HOWTO_make_and_use_a_new_application

Regards,

K.

[Dean Chen]

Many thanks! I may read these documents first and try to implement them myself : )

Best regards!

Dean

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[Matt Anonyme]

You can also load some real programs (for instnace iperf2) via the DCE extension of ns3: https://www.nsnam.org/overview/projects/direct-code-execution/

[Christian Kreuzberger]

Yes, it is absolutely possible, though you will come across some smaller issues that you need to bypass. 

As a starting point: https://www.nsnam.org/doxygen/tcp-large-transfer_8cc_source.html

From that, you work your way around with the link from Konstantinos (Putting real bytes in the payload). 

.

[Dean Chen]

Thanks! I shall try it all :)

Dean