How to stop only one wifi node in the network.

[Rui Yang]

Hi group,

I'm working on a wifi scenario with node failure and energy tracking. If I use Simulator::Stop(), the whole application will shut down. If I use a "manual" flag to condition the sending/receiving behavior, the energy consumption keeps going on. So I wonder whether there is a way to simulate a one node failure in wifi scenario.

On the other hand, I'm a little confused about the energy model. I'm currently using flag to label sending/receiving, and node 1 will stop sending at 1500s, node 2~5 keep sending until 3000s. The sending mechanism is gossip. However, they have almost the same energy consumption, so I wonder what's the main factor of energy consumption.

I used the example in https://www.nsnam.org/doxygen/energy-model-example_8cc_source.html. And the only modification is that I change basicSourcePtr to a vector so that I could trace all the nodes. So my energy-related codes are:

/***************************************************************************/

  /* energy source */

  BasicEnergySourceHelper basicSourceHelper;

  // configure energy source

  basicSourceHelper.Set ("BasicEnergySourceInitialEnergyJ", DoubleValue (t_max * 20.0));

  // install source

  EnergySourceContainer sources = basicSourceHelper.Install (nodes);

  /* device energy model */

  WifiRadioEnergyModelHelper radioEnergyHelper;

  // configure radio energy model

  radioEnergyHelper.Set ("TxCurrentA", DoubleValue (0.0174));

  // install device model

  DeviceEnergyModelContainer deviceModels = radioEnergyHelper.Install (devices, sources);

  /***************************************************************************/

  /*** Setup Energy Tracing ****/

  Ptr<BasicEnergySource>* basicSourcePtr = new Ptr<BasicEnergySource>[numNode];

  for (int i = 0; i < numNode; ++i) {

    basicSourcePtr[i] = DynamicCast<BasicEnergySource> (sources.Get(i));

    basicSourcePtr[i]->TraceConnectWithoutContext ("RemainingEnergy", MakeCallback (&RemainingEnergy));

    // device energy model

    Ptr<DeviceEnergyModel> basicRadioModelPtr =

      basicSourcePtr[i]->FindDeviceEnergyModels ("ns3::WifiRadioEnergyModel").Get (0);

    NS_ASSERT (basicRadioModelPtr != NULL);

    basicRadioModelPtr->TraceConnectWithoutContext ("TotalEnergyConsumption", MakeCallback (&TotalEnergy));

  }

  // print remaining energy

  for (DeviceEnergyModelContainer::Iterator iter = deviceModels.Begin (); iter != deviceModels.End (); iter ++) {

    double energyConsumed = (*iter)->GetTotalEnergyConsumption ();

    std::cout << "Total energy consumed by radio = " << energyConsumed << "J \n";

  }

I'll sincerely appreciate it if there is any suggestion

Thanks,

-Rui

[Varun Reddy]

https://groups.google.com/forum/#!searchin/ns-3-users/How$20to$20turn$20a$20node$20off$20and$20on$20based$20on$20its$20remaining$20energy%7Csort:date/ns-3-users/zfZ2pMGrl0I/UtV-dcPJBwAJ