Hello Seung-Hun Oh,
IBR-DTN currently lacks bundle fragmentation features, but is prepared to and will do this in future. The reason because it is still not implemented is, that it is difficult to use fragmentation with a duplicating routing scheme. Each bundle gets copied on each link and if there is fragmentation, you will gain much more copies. Since the only routing scheme in IBR-DTN is epidemic, using fragmentation is not a good option or should at least well-considered.
Best regards Johannes Morgenroth
Am 05.11.2010 09:04, schrieb 오승훈:
Hello,
TCP convergence layer of IBR-DTN has been proved to be able to deliver large file (around 600 MB).
But, IBR-DTN seems to make only one bundle for one file to be sent.
If the file is not big one, it might be O.K.
What if the file size is more than 1GB?
If the connection is broken during transmitting big bundle, how can it be recovered?
Do I have to retransmit from the beginning?
From this reason, I think, fragmentation is defined in rfc.
I wonder whether IBR-DTN implements fragmentation in TCP convergence lay?
I hardly find proper source code for it.
If not, is there any reason?
Any comment will be big help for me.
Thanks in advance!
Best Regards,
Seung-Hun Oh