[ns] why ns-2??

[Olivier De Mey]

Hi Vanathi,

I would give you a quick answer :

Simulation is often based on random events.

Therefore, if you want a real time implementation, then if 2 events are 
seperated by minutes, then you would just have to wait. Ns-2 is 
event-oriented, and therefore if there is nothing to do between 2 
events, then the clock is incremented, and you do not have to wait.

In the other hand, suppose you have a large simulation with a lot of 
users. In case a complex treatment has to be done at each user's 
equipment, then the computer would have to do it all, with NO real-time 
guarantee !

Thirdly, ns-2 is a supported by a whole community, and freely available; 
if you can find a real-time simulator please let me know, but I do not 
see any.


Sincerely,

Olivier

anujaabhuvan2 at mail.akce.ac.in wrote:

>I've been working on ns-2 for the past 4-5 months. My title is "A QoS
>Architecture for Quantitative Service Differentiation". but whenever i
>give
>a presentation, the first question asked is why are you using ns-2 and
>not any real time implementation? and most of the time i
>dont have any good answer so can anyone please tell me why is ns-2 the
>best option to be used.
>
>
>Thanks,
>Vanathi.
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