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Figure 11 shows the measurement accuracy depending on the number of probe packets.
The measurement accuracy is the ratio of the number of measurements in which all 4 high-loss links are correctly located to the total number of measurements (10,000 in our setting).
We see that a route scheme with longer terminal paths needs a larger number of probe packets to operate accurately.
This is because the losses at upstream links of the long path can degrade the loss measurement at downstream links.
If a small number of probe packets arrives at the upper port of a normal link, its measured packet loss rate can exceed the threshold even by a very small number of losses accidentally happening.
On the other hand, a small number of probe packets may result in the measured packet loss rate of a high-loss link less than the threshold.
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IEEE/ICACT20210168 Slide.17
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