Affect of Duty Cycling Interval

[sok sereirathana]

Dear all

Hello everybody. Please help me.I am doing theses and next week is deatline. I am research for Affect of Duty Cycling Interval.I use Omnetpp. 

i want to evaluate results (Packet Delivery Ratio, End To End Delay, Control Traficc Overhead ) when i change the value of CHANNEL_CHECK_RATE(it in core/rdc/contikiMAC.h). I give CHANNEL_CHECK_RATE =2, 4, 8, 16, 32, 64, 128, 256.I want to know between which value is the best result. But unfortunately when i run my code the result is the same all the value of  CHANNEL_CHECK_RATE.

I have attach my file result and my code.It is the mistake of code or other reasons?Everyone please give me how to solve this problem?Please help me!!!

Best regards

Rathana