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Caracterización y cuantificación de los efectos del "path inflation" en una red comercial en producción
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rey, Roberto González |
| Copyright Year | 2011 |
| Abstract | The routing distance between two physical emplacements in a communications network is, generally, larger than the geographical distance between such locations. This fact of end-toend routes larger than necessary is referred in the literature as “Path Inflation”. When the difference between these two distances is significant, reverberates directly in the performance of the communications, producing delays larger than necessary which prevent reaching expected limits of transmission speed. The present study aims to characterize and quantify the Path Inflation in a commercial network under production, such as the Spanish academy network RedIRIS, and its main international traffic destinations. RedIRIS offers a high-capacity communications network, enabling the spanish academic and scientific community Internet access and fostering the participation in national and international research projects. To characterize and quantify the Path Inflation, we have made measurements of the routing distances between Madrid and RedIRIS significant international locations by means of the traceroute tool. The measurements obtained were compared with geographic distances between such locations, thus allowing a characterization of the Path Inflation within RedIRIS. Subsequently, we quantified the real impact of the Path Inflation so far obtained. To do this we used a characterization of the most popular foreign destinations from RedIRIS, obtaining a weighted measure of Path Inflation, namely Path Inflation Traffic, which takes into account not only the difference between geographic and routing distance, but also how much traffic is transmitted between both ends. The main objective was to determine whether the most popular destinations are well connected to RedIRIS, and therefore the impact of the Path Inflation is not decisive in the user experience. We include such critical countries classification in Path Inflation Traffic at continental and worldwide level. The most important finding of this study is that RedIRIS is not well connected with the European countries that receive most traffic (Germany, United Kingdom, France, Italy, Portugal and Switzerland). In the other countries, the length of the routing distance is not alarming taking into account the traffic they receive. As a secondary objective we studied the delays and how the Path Inflation directly influences in these latencies. The metric for the delays calculation is Round-Trip Time, time of return of a packet between two ends in a communication, and the analysis indicates that the countries most popular in RedIRIS (which receive more traffic) typically comprise an acceptable Round-Trip Time. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://repositorio.uam.es/bitstream/handle/10486/7618/42591_20111121RobertoGonzalezRey.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
