how to change channel parameters in time

[Mariusz Słabicki]

Hello,

i am implementing the Gilbert-Elliot channel model in my simulations. The essence of that model is that parameters of the model (like a PER) are changed in time. I thought that to model these changes i can use selfMessages, and on every receive of selfMessage the parameters will change. Unfortunately class cChannel does not have the handleMessage() method, because this class does not inherite from the cModule. Do you have any ideas how i can model changes of the channel parameters in time?

Best regards,

Mariusz Słabicki

[Alfonso Ariza Quintana]

You don’t need to use handleMessage, you can use the method used to compute the BER to actualize the status, only of you need to change the status at fixed time interval you could need to use an event

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[Mariusz Słabicki]

Hi Alfonso,

thank you for your reply. I am not sure if i understand your idea. In my model the parameters should change every time (random time). Could you explain your thought a little wider?

Best regards,

Mariusz Słabicki

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[Alfonso Ariza Quintana]

Some like this

 

double MyModel::calculateReceivedPower(double pSend, double carrierFrequency, double distance)

{

    double waveLength = SPEED_OF_LIGHT / carrierFrequency;

    double rx_power = freeSpace(Gt, Gr, L, pSend, waveLength, distance, pathLossAlpha);

    simtime_t time = simTime();  

    return myFunc(rx_power,time);

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[Mariusz Słabicki]

Thank you. To be honest i am still not getting your point. From which class should the class MyModel inherit? 

Best regards,

Mariusz Słabicki

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