Title of article :
Splitting and merging of packet traffic: Measurement and modelling
Author/Authors :
Hohn، نويسنده , , Nicolas and Veitch، نويسنده , , Darryl and Ye، نويسنده , , Tao، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
14
From page :
164
To page :
177
Abstract :
This paper concerns the modelling of Internet packet traffic. In previous work we showed that a Bartlett–Lewis point process, as a model of packet arrivals on backbone links, enjoys strong physical backing and can predict key features. It is based on the surprising empirical observation that flows can often be considered independent for the purpose of modelling packet arrival times. We extend this work in two ways by using a unique dataset obtained from an experiment where all the packets crossing a backbone router are captured. First, this enables an examination of the validity of the fundamental assumptions underlying the model across several links, covering a large range of bandwidths and utilization levels. Second, we extend the model from links to a network node, by examining the merging and splitting properties of the (sub)streams through the router, and mapping these to the merging and splitting properties of the model. We show how the model can, in most cases, capture the observed multiplexing and demultiplexing behaviour of the router, opening up the possibility of its use for understanding traffic flows in networks. We show that failures in the model cannot be accounted for simply through considering utilisation levels, and explain how they can in fact be used as a detector of upstream bottlenecks and traffic shaping.
Keywords :
traffic modelling , Empirical validation , Semi-experiments , Router measurements , Cluster processes , Splitting and merging
Journal title :
Performance Evaluation
Serial Year :
2005
Journal title :
Performance Evaluation
Record number :
1569880
Link To Document :
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