Abstract

AbstractThis chapter presents scalable conceptual and analytical performance models of overall telecommunication systems, allowing the prediction of multiple Quality of Service (QoS) indicators as functions of the user- and network behavior. Two structures of the conceptual presentation are considered and an analytical method for converting the presentations, along with corresponding additive and multiplicative metrics, is proposed. A corresponding analytical model is elaborated, which allows the prediction of flow-, time-, and traffic characteristics of terminals and users, as well as the overall network performance. In accordance with recommendations of the International Telecommunications Union’s Telecommunication Standardization Sector (ITU-T), analytical expressions are proposed for predicting four QoS indicators. Differentiated QoS indicators for each subservice, as well as analytical expressions for their prediction, are proposed. Overall pie characteristics and their causal aggregations are proposed as causal-oriented QoS indicators. The results demonstrate the ability of the model to facilitate a more precise dynamic QoS management as well as to serve as a source for predicting some Quality of Experience (QoE) indicators.

Highlights

  • The telecommunication service is the basis for the Information Service Networks

  • The quality of service (QoS) has many aspects – QoS offered by the provider, QoS delivered (QoSD), QoS achieved by the provider, QoS experienced by the user/customer (QoSE or QoSP – QoS perceived) and others

  • The main objective of the authors of this chapter is the development of scalable performance models of overall telecommunication systems, as a part of Information Service Networks, including many of the observable system-dependent factors deter‐ mining the values of QoS indicators

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Summary

Introduction

The telecommunication service is the basis for the Information Service Networks. From the very beginning the Internet began its existence as a packet-based communication system without guarantees for the quality of the services, which are provided on a besteffort basis. The main objective of the authors of this chapter is the development of scalable performance models of overall telecommunication systems, as a part of Information Service Networks, including many of the observable system-dependent factors deter‐ mining the values of QoS indicators. These models may be used for multiple purposes but the aim of this chapter is to develop prediction models for some key QoS indicators’ values, as functions of the user behavior and technical characteristics of the overall telecommunication system. In the Conclusion, possible directions for future research are discussed

Conceptual Model
QoS Prediction Task Formulation
Main Assumptions
Overall Input Flow Intensity
QoS Indicator 1
Repeated Calls Flow
QoS Indicator 2
B-Terminals’ Characteristics
A-Terminals’ Characteristics
QoS Indicator 3
Network Generalized Subservice Indicators
AB-Terminals’ Characteristics
3.10 Offered Traffic to the Switching System
QoS Indicator 4
Overall Pie Parameters
Causal Aggregated Overall Pie Parameters
Numerical Results for Pie Characteristics
Conclusion
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