Dear Behnaz, Looks like you don't quite understand how MAC 802.11 works.
"Phy/WirelessPhy set bandwidth_ 2e6" will only be used if you have not set basicRate_ or dataRate_ in your MAC setup. Even so the transmission time does not do "packet size/channel bandwidth", suggest you to study how Mac802_11::txtime(double psz, double drt) function works in mac-802.11.cc Good Luck. rgds Saravanan K On Sun, Dec 2, 2012 at 1:02 PM, Behnaz Bostanipour <behnaz.bostanip...@unil.ch> wrote: > > Hello, > > I would like to calculate transmission time (tx_time) for packets sent by > CMU MAC 802.11. > > Usually we have tx_time=packet size/channel bandwidth. > > I looked in the "ns-default.tcl" file and I have found this value: > > Phy/WirelessPhy set bandwidth_ 2e6 > > Is this the value used for calculation of tx_time by 802.11? > > Thanks, > Behnaz >
