'How to implement QoS in IoT using Cooja Simulator? single instance or multiple instances?

I am working on research topic "QoS mechanism in IoT". I have to implement QoS in Cooja simulator. My questions are:

  1. How can I classify 3 types of applications (Critical, Real time, Non-real time) in cooja simulator? Which method of cooja can make these nodes different from each other?
  2. How I can implement multiple queues in cooja (weighted fair queue) one queue for each type of traffic? Can anyone help me in this implementation? or can implement it? Thank You


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