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J Am Med Inform Assoc 9:491-499 doi:10.1197/jamia.M1030
  • Focus on Simulation

Exploring Issues of Quality of Service in a Next Generation Internet Testbed: A Case Study Using PathMaster

Table 1

Numeric Results Presented Graphically in Figures 7–9*

% Bandwidth 0 69 88 94
Average run times (sec)
 FIFO 28.1 77.3 132.4 305.4
 PRIORQ 34.4 80.7 125.0 158.4
 WRED 35.6 76.2 103.5 141.0
 WFQ 32.9 75.1 117.3 149.3
Standard deviation of the run times (sec)
 FIFO 0.6 8.6 8.8 88.5
 PRIORQ 1.0 3.8 6.2 8.8
 WRED 1.4 5.1 2.7 5.7
 WFQ 1.2 1.8 5.5 7.0
Run times for WFQ with shaping (sec)
 WFQ no shape 32.9 75.1 117.3 149.3
 WFQ shape 4000 33.4 63.9 73.9 82.4
 WFQ shape 2000 32.7 40.8 42.6 43.5
 WFQ shape 200 32.9 33.1 33.2 33.1
  • * Each reported time represents the average of 10 runs. For each set of runs, the table indicates the % of the bandwidth consumed by competing network traffic as described in the text.

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