Traffic intensity is a traffic density unit. Traffic intensity value explained in Erlang unit (Agner Kraup Erlang, Denmark, 1878-1929). Numeric value of traffic intensity is indicating total call average that simultaneously proceeds by switching equipment in time period. The mathematic formula is:
Traffic Intensity = Total occupation time from server/Interval time observation
To make easiest calculating how big the traffic intensity based on upon formula, there is 3-approximation method:
Approximation method –1:
Total call/occupation (on switching equipment system or server), that is C, observed as long as time interval T.
Approximation method -2:
If found C occupation as long as time interval T and occupation number i to possess occupation time as long as ti.
Approximation method -3:
If C = Total call (occupation) per time unit
= Average call rate
tr = Average occupation time
Then, traffic intensity: A = C . tr
