about RandomPropagationLossModel

[LILING]

YansWifiChannelHelper wifiChannel;
wifiChannel.AddPropagationLoss("ns3::RandomPropagationLossModel","Variable",
RandomVariableValue(UniformVariable(27.0, 43.0) ));

msg="Invalid value for attribute set (Variable) on
ns3::RandomPropagationLossModel", file=../src/core/model/object-factory.cc,
line=76
terminate called without an active exception


i use ns3.19.
the reason of this error?

thanks a lot.

[Konstantinos]

The reason is that you give an Invalid value for attribute 'variable'

• Variable: The random variable used to pick a loss everytime CalcRxPower is invoked.
  • Set with class: ns3::PointerValue
  • Underlying type: ns3::Ptr< ns3::RandomVariableStream>
  • Initial value: ns3::ConstantRandomVariable[Constant=1.0]
  • Flags: construct write read

It expects a PointerValue for a RandomVariableStream and you give a RandomVariableValue. 

I guess you have copied this code from an example for a ns-3 release older than ns-3.14 (that's when this change was introduced).

 

thanks a lot.