CODEWITHSUNDEEP
omnet++
Forough Goudarzi
Forough Goudarzi

Reputation: 31

how to measure channel busy time in veins?

is there any function that returns channel busy time? I use veins-2.2, mac and decider 802.11p. if there is not such function, how measuring the channel busy time is possible?

Upvotes: 1

Views: 965

Answers (1)

Christoph Sommer
Christoph Sommer

Reputation: 6943

Channel busy time in Veins 2.2 is measured at two points: in the Phy layer and in the Mac layer. Both record a corresponding scalar value at the end of the simulation. Note that there is a difference in meaning between the two:

  • Mac busy time is (in almost all cases) what you want to record: it records how many seconds the Mac treated the channel as busy. Divide the scalar totalBusyTime by the total simulation time and you know the fraction of time that the Mac could not send.
  • Phy busy time is calculated very different: its value busyTime increases for each frame received above the sensitivity threshold. To give an example, if 1 frame is being received at any given time during the simulation, the value of this scalar would be 100%. If 4 frames are interfering for all of your simulation, the value of this scalar would be 400% (which is different to the Mac busy time you probably want).

Upvotes: 4

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