[ns] [BUG] -- MAC 802.11, the error frame presumption

[JengFarn Lee]

Hi to all,

   The current ns-2 implementation has a problem in mis-identify the frames sent from stations
located between carrier sense and transmission range of receivers as error frames which will 
cause significant throughput unfairness resulting in many wrong simulation results in wireless networks. 
Here we provide a patch to fix this problem.

http://ants.iis.sinica.edu.tw/members/kunimi/ns-2_frame-error_bug.htm

Cheers,
JengFarn Lee