[ns] How to set mobile node position dynamically?

[terence_tan@dso.org.sg]

Dear All,

Does anybody has any idea on how to change the following parameters dynamically 
outside the ns during the simulation:

1. Scheduler (eg, when to start/stop transmit)
2. position of mobilenode (x,y,z parameters)
3. read the trace data during the simulation.

Thanks in advance. 

Regards,
Terence