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Service Curve Estimation by Measurement: An Input Output Analysis of a Softswitch Model

2005; Springer Science+Business Media; Linguagem: Inglês

10.1007/978-3-540-30573-6_4

1611-3349

Luigi Alcuri, Giuseppe Barbera, Giuseppe D’Acquisto,

Interconnection Networks and Systems

In this paper, we describe a new method to solve a methodological problem for the analysis of telecommunications systems in packet networks. The basic building block of the framework is the concept of service curve, which defines a general QoS model. In terms of min-plus theory, a system is characterized by a service curve, which is determined by the latency and the allocated rate. Unfortunately, there are no analytical expressions that compute the parameters of a service curve for a non-FIFO and work-conserving systems. Our simulation based approach, instead, can be applied to all these systems and gives an estimate of the service curve in a very simple way, with minimum information about system architecture. We applied this method to a very simple model of a Softswitch node in a NGN telephone service environment. The main result of the work is the selection of a proper rate-latency service curve.