NS-3 simulation time

• To get current simulation time:
  ns3::Time mytime = Simulation::Now();


• To get Time from human time unit
  ns3::Time mytime = Seconds(1.0)
  
  OR
  ns3::Time mytime = MilliSeconds(1000)
  
  OR
  ns3::Time mytime = MicroSeconds(1000000)
  
  OR
  ns3::Time mytime = NanoSeconds(1000000000)


• To convert the Time to human time unit:
  double seconds = mytime.GetSeconds();
  
  OR
  int64_t ms = mytime.GetMilliSeconds();
  
  OR
  int64_t us = mytime.GetMicroSeconds();
  
  OR
  int64_t ns = mytime.GetNanoSeconds();