As part of a broader organisational restructure, data networking research at Swinburne University of Technology has moved from the Centre for Advanced Internet Architecture (CAIA) to the Internet For Things (I4T) Research Lab.

Although CAIA no longer exists, this website reflects CAIA's activities and outputs between March 2002 and February 2017, and is being maintained as a service to the broader data networking research community.


Set C 1msec Packet Inter-Arrival Time


The following section shows the difference between automatically allowing the interface to detect the line speed and explicitly setting the line speed of an interface for 1msec packet inter-arrival time.

We can see that the outliers in Figure 22 are no longer as far from the theoretically ideal time-stamp in Figure 23 when then line speed was explicitly set to 10Mbit/sec. We can see that this is also true for Figures 24 and 25 where outlier distance is reduced by explicitly setting the line speed to 100Mbit/sec.

Figure 22: Automatic 10Mbit/sec
Figure 23: Explicit 10Mbit/sec
Figure 24: Automatic 100Mbit/sec
Figure 25: Explicit 100Mbit/sec

We can see from Tables 21 and 22 that although the far outlier distance from the theoretically ideal time stamp are smaller, the variance and standard deviation has in fact increased, though only slightly. Tables 23 and 24 show that explicitly setting the line speed to 100Mbit/sec instead of allowing automatic detection slightly reduced the variance and standard deviation due to reduction in far outliers.

Table 21: Automatic 10Mbit/sec (usec)

Mean
Variance
Standard Deviation
1083.294
1.247
1.117

Table 22: Explicit 10Mbit/sec (usec)

Mean
Variance
Standard Deviation
1083.294
1.264
1.124

Table 23: Automatic 100Mbit/sec (usec)

Mean
Variance
Standard Deviation
1008.408
1.606
1.267

Table 24: Explicit 100Mbit/sec (usec)

Mean
Variance
Standard Deviation
1008.408
1.440
1.200





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