Consider the communications network of Example 9.26, where there were two processors in ea...

Consider the communications network of Example 9.26, where there were two processors in each SP (Signaling Point). At which SP should a third processor be added to reduce the average end-to-end delay by the greatest amount? Perform a 2⁴ factorial design with n = 10 replications at each of the 16 design points; the different system configurations should be simulated using CRN (see Example 11.9). All replications should be of length 62 seconds, with the first 2 seconds’ being a warmup period. Construct 90 percent confidence intervals for the expected main and two-factor interaction effects. Which effects are statistically significant?

Example 9.26

Note: Each line segment represents two links.

FIGURE 9.12 Topology of the SS7 network.

FIGURE 9.13 Moving average with w = 600 for end-to-end delays, SS7 network.

TABLE 9.6 Traffic rates (in messages per minute) from one SP to another SP

TABLE 9.7 Initial links used (see Fig. 9.12) in going from one node (row) to another node (column)

Example 11.9