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[ns] Handoff in Wireless LAN



Hi,
    I am trying to simulate handoff algorithms in a Wireless LAN, need some help on the following:
 
1.    I wish to know if ns (i am using 2.1b8) takes into account latency when a mobile node moves between domains.
2.    Instead of using distance as given in Marc Greis' tutorial, can I make the mobile node periodically check the signal strength of the Base Station as it is moving from the domain of one BS to another?
3.    I hope to monitor the performance of my handoff algorithm by checking the latency, number of lost packets and BER (any error models which i can use?). Any one knows if this can be done?
 
    I will really appreciate it if someone can give me some pointers on the above cos I am only a 10-day old ns-user.
 
Thank you so much,
Kerwin.