Teletraffic engineering/What is the Engset calculation?/Solution 2
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Table 2.1 below shows the results for Engset calculations.
Number of sources | 10 | 20 | 30 |
Number of lines | 5 | 5 | 5 |
Traffic offered | 2 | 2 | 2 |
Probability of blocking | 0.0175 | 0.0294 | 0.0335 |
Table 1: - TABLE 2.1 ENGSET CALCULATION RESULTS.
Table 2.2 below shows the results for Binomial calculations.
Number of sources | 10 | 20 | 30 |
Number of lines | 5 | 5 | 5 |
Traffic offered | 2 | 2 | 2 |
Traffic in erlang per source | 0.2 | 0.1 | 0.0667 |
Probability of blocking | 0.0196 | 0.0352 | 0.0409 |
Table 1: - TABLE 2.2 BINOMIAL RESULTS
Notice that Binomial's assumption that traffic is queued provides a higher blocking probability than Engset.
(This exercise is referenced from Richard Parkinson, Traffic Engineering Techniques in Telecommunications [2].