Dear All I would like to carry out number of simulation to measure throughput , delay and jitter by varying the intial value of contention window (CWmin). What i did : I added the following two lines to my TCl-script before node creation: Mac/802_11 set CWMin_ 31 ;# could be any value less than the CWmax. Mac/802_11 set CWMax_ 1023 I am using ns-2.29. Is that correct?? If not could any one correct me please.