[ns] Adding extra Propagation Delay

[Bahman Kalantari Sabet]

Dear all,

I need to add an additional propagation delay of (for the sake of argument, 
let's say) 5 micro seconds into the MAC of 802.11 network so that all 
packets going through the MAC layer pass through this extra delay.

Where should I look and how is it done?
Do I need to adjust any timeout values anywhere? How about the timers?

Thanks,

Bahman

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