Traffic Measurement (telecommunications) - Assumptions Made When Calculating Circuits Required

Assumptions Made When Calculating Circuits Required

To perform calculations in circuit-switched networks several assumptions are made :

  • Calls arrivals follow a Poisson distribution
  • Holding times follow a Negative Exponential distribution
  • Blocked calls are lost or overflow
  • There is statistical equilibrium

It is useful to remember that the measurements are averages, and this process deliberately ignores very short term variations in the traffic, but still allows for a small but finite loss. The above assumptions are accurate if applied to circuit switched networks; however they fail when planning for data traffic, small exchanges and sudden sharp peaks in traffic such as that caused by TV and radio phone-in competitions.

Read more about this topic:  Traffic Measurement (telecommunications)

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