Hi, In real 802.11b and 802.11g wireless cards the bit rate changes dynamically depending on the channel conditions. If the card is working at 54Mbps and is receiving no ACK's from the receiver it will automatically switch to a lower bit rate. Modulations used by lower bit rates are stronger against errors, so the link may improve its performance at a lower speed (at least some packets will arrive). There are some algorithms that rule the bit rate such as the one used by the mad-wifi driver for atheros chips. I would like to simulate this behavior in ns2. I'm new using ns2 and I was not able to find the code which simulates this behaviour, is this feature implemented on ns2? Is anybody else interested on this topic?
Thanks, Guillermo
