[ns] Need help to use Rayleigh fading in ZigBee

Hi all, How can I use rayleigh fading model in ZigBee stack. Tworayground radio propagation model used in ZigBee/IEEE 802.15.4 . Can I use rayleigh fading propagation model instead of tworayground. How can I change it. -- With best regards, Pratiti

[ns] [Urgent]How can I calculate number of collision for IEEE802_15_4 in ns-2

Hi All, Please let me know how can I calculate number of collision for ZigBee in ns2. If any one has any code please send me. -- With best regards, Pratiti

[ns] package for "ZigBee sensore network model"

Hi All, Please sent me the link from where we can download code for "ZigBee sensor network model" for ns-2. and documentation on ZigBee n/w. How can I use it. Thanks in advance. -- With best regards, Pratiti