Measuring in Two One-way

Certain measures of interest need simultaneous and opposite directions in traffic generation. In Set2 of the Tangram-II Traffic Generator the user is allowed to apply this kind of measure.

From the collections, important measures of interest are estimated by the tool. After collecting the traffic, the estimated delay is usually not accurate, because of the problems with different clocks. These problems are shown in Figure A. However, algorithms [#!josefbiro2000ifip!#,#!lizhang2002infocom!#] are implemented in the tool to solve the Offset and Skew problems. The one-way delay of the probes, after applied to the algorithms in the initial trace, is shown in Figure B. A PMF estimation of the delay tried by the probes in both directions is shown in Figure C.

Figure: Delay calculation of probes generation: (A) with Skew and Offset, from one of the traces (B) After removing Skew and Offset, from one of the traces (C) Histogram of delay probability with both traces.