[ns] Documentation on MAC 802.15.4 implementation.

[Devi S]

 Hi Ns users,
 
 Any body can help me to understand the implementation of
 the mac layer
 802.15.4 on NS2?
 the different classes and their utilities. to comment the
 code of mac
 802.15.4.
 
 Thanks in advance,
 REGARDS,
 Devi