how to set different TxCurrentA for each wifi node?

[13634...@qq.com]

dear  all

i want to set different TxCurrentA for each wifi node based on the distance between nodes.At first I referred to energy-model-example.cc and attempted to call WifiRadioEnergyModel::SetTxCurrentA.But  There is not WifiRadioEnergyModelContainer,only DeviceEnergyModelContainer . what should I do?

/** Energy Model **/

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

  /* energy source */

  BasicEnergySourceHelper basicSourceHelper;

  // configure energy source

  basicSourceHelper.Set ("BasicEnergySourceInitialEnergyJ", DoubleValue (100.0));

  // install source

  EnergySourceContainer sources = basicSourceHelper.Install (c);

  /* device energy model */

  WifiRadioEnergyModelHelper radioEnergyHelper;

  // configure radio energy model

  radioEnergyHelper.Set ("TxCurrentA", DoubleValue (2.0));

  // install device model

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