Re: [ns] Link delay, what is it?

[Debojyoti Dutta <ddutta@ISI.EDU>]

When you set the link delay you set the propagation delay. The
transmission delay is given by 1/BW and the queuing delay depends on the
buffer capacity, average queue length and the queueing discipline.

For longer packets, delay will be longer.

Hope this helps
Debo

On Thu, 7 Jun 2001, Huan Pham wrote:

> 
> Hi NS users,
> 
> My understand is that the Delay of a packet over a link consists of 4
> elements:
> 
> 1 - Queueing Delay
> 2 - Processing Delay
> 3 - Propogation Delay (negligible for most scenario, excluding satelite)
> 
> 4 - Transmission Delay (= packetSize / Bandwidth)
> 
> My question is, in NS, when we set a delay for a link, what delay we
> mean here. Of course it not the queueing delay, transmission delay. So I
> believe it must be a sum of the processing delay and the propogation
> delay. IS THAT CORRECT? If so, is that value the same for all packets
> regardless of their packet sizes? It's questionable, as I believe longer
> packets may require more processing time.
> 
> Thanks for your reply.
> 
>