Hello....
I want to modify on the contention window (CW) and the AIFS period in the source code of ns2 .i will be thankful if any one tell me under what file in the source code of the ns2 program the (contention window) and the (AIFS) exist.

You're going to have to look through the source and find that out. I doubt people here are going to pull the source code down, and pull through all the files, so we can tell you where to look.

TB0ne thanks for replying ,honestly iam ganna be very grateful if any one tells me under what file in the source code they are exist ..

Best Regards

Like I said...YOU are going to have to open the files, and figure it out yourself.

I doubt anyone else is going to volunteer to open each and every file up, look through them, so they can tell you which file YOU want to modify....

ns-2.33 ... In fact it is rather easy to find :

cd <directory-with-ns-2.33>
grep -i aifs ns-2.33/*/*

grep -i contention ns-2.33/*
grep -i contention ns-2.33/*/*

Lots of results > > I think, you will find,
what you are looking for.
......

OK .. I found time to sort the text result :
grep -i aifs ns-2.33/*/* : AIFS is mentioned in ns-2.33/mac/mac-802_11Ext.h

grep -i contention ns-2.33/* : ns-2.33/CHANGES.html

grep -i contention ns-2.33/*/* : ( ns-2.33/common/parentnode.h ),
( ns-2.33/doc/lan.tex ), ( ns-2.33/doc/mobility.tex ),
ns-2.33/mac/channel.cc, ns-2.33/mac/channel.h, ns-2.33/mac/mac-802_11Ext.h,
ns-2.33/mac/mac-802_11.h, ( ns-2.33/mac/mac-csma.cc ), ns-2.33/mac/mac-csma.h,
( ns-2.33/mac/mac.h ), ns-2.33/mac/smac.cc, ns-2.33/mac/smac.h,
(ns-2.33/mac/wired-phy.cc ), ( ns-2.33/mac/wired-phy.h ),
( ns-2.33/satellite/satlink.cc ), (s-2.33/satellite/satlink.h ).
.....