Re: [ns] Delay tolerant network (DTN) simulation in ns2

Thanks,
It means dtn can use either tcp or udp?
 
 
 
Yes i am working but still not succeeded in getting simulation done in ns2.
 
Surely  i'll share with u if found any.

________________________________
From: nish patel <nishaptn@gmail.com>
To: itishi saxena <itishi00@yahoo.com>
Sent: Wednesday, 18 January 2012 4:01 AM
Subject: Re: [ns] Delay tolerant network (DTN) simulation in ns2

Hello,

Sorry for reply because of my exam.

your concept is right for convergence layer.

tcp/ip stack does not interact directly with bundle protocol which is
above transport layer . so, convergence layer is used to convert
segments of the transport layer  into bundles of bundle layer

if you get any code for convergence layer in ns2 then please give me.

are you working on dtn?
................................................................................................
From: itishi saxena <itishi00@yahoo.com>
To: Nisha Patel <nishaptn@gmail.com>; "ns-users@ISI.EDU" <ns-users@ISI.EDU>
Sent: Tuesday, 10 January 2012 5:31 PM
Subject: Re: [ns] Delay tolerant network (DTN) simulation in ns2

Hi Nisha,

Can you please tell me about convergence layer in your simple words?

I understood that it is for dtn, which select particular interface according to the application's transport protocol....for tcp tcp convergence layer, udp..udp convergence layer.

Means this convergence layer does a kind of preparation as per the requirement of routing protocol.
I mean to say that like if one application is running using TCP connection,,,,anf if DTN routing should be followed then it will choose tcp convergence interface to prepare bundles accordingly and then any DTN routing mechanism will be applied on those bundles.
At this point in time...use of tcp convergence layer is to provide reliable communication or it  signifies some other information.

I hope you understand my problem and can help me in getting into it.

Thanks in advance,
Ranjana