Conference Paper

On the Minimal state tuple of VNET with overall QoS guaranties

Authors:
To read the full-text of this research, you can request a copy directly from the authors.

Abstract

A definition of overall telecommunication network performance is presented. A model of overall virtual telecommunication network (VNET), with QoS guaranties for Class 0 traffic (Real-time, jitter sensitive, high interaction: VoIP, Video Teleconference), is considered in stationary state, taking into account details of the users' behaviour. The approach described allows reducing the number of system describing parameters from over 260 (System Tuple) to 9 parameters: 8 static and one dynamic. This Minimal Tuple set and the correspondent equations described look as the minimal possible information for the overall telecom network performance modelling. The system of 9 equations presented, allows easy finding the all, important for overall network dimensioning/re-dimensioning, dynamic parameters.

No full-text available

Request Full-text Paper PDF

To read the full-text of this research,
you can request a copy directly from the authors.

Chapter
The aim of the paper is to summerize some of the methods for modeling of overall telecommunication systems developed by the authors at the Institute of Mathematics and Informatics of the Bulgarian Academy of Sciences and to propose new methods using the apparatus of the Generalized Nets (GNs) theory. On the basis of the discussed methods, two basic tasks about overall telecommunication systems are formulated. Analytical models for solving the Quality of Service (QoS) prediction task and the Network Dimensioning/Redimensioning Task (NDT/NRDT) are proposed. A classical model of overall telecommunication system is considered. General teletraffic tasks are formulated on the basis of a proposed conceptual model. Some assumptions for the system are stated which allow for a relatively simple analytical model to be obtained. Analytical expressions for basic teletraffic characteristics of the main tasks about overall telecommunication systems are derived. Graphical representation of the results is included. A comparison with other approaches for network dimensioning is made and is represented graphically
Chapter
This 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.
Article
Full-text available
The main current concepts in overall Quality of Service (QoS) considerations in telecommunication systems, in documents of the leading standardization organizations, are found and put together. At least fifteen Open Issues for further study are formulated. Proposed are: Work Definitions of Communication and Telecommunication; A Reference Model of a Telecommunication System; Definitions of Overall Telecommunication Network and System Performance; Two Telecommunication System States' modelling approaches are described; Parameters' Classification Based on Their Values' Establishing Method is proposed, for the needs of design models; The necessity of Causal Classification of Values in Telecommunication Systems' Models is argued; The necessity of Overall Telecommunication System's Parameters' Notation System is argued and a set of requirements is listed. An initial step of such notation system, proposed and used by authors is described.
Article
Full-text available
In the teletraffic engineering of all the telecommunication networks, parameters characterizing the terminal traffic are used. One of the most important of them is the probability of finding the called (B-terminal) busy. This parameter is studied in some of the first and last papers in Teletraffic Theory. We propose a solution in this topic in the case of (virtual) channel systems, such as PSTN and GSM. We propose a detailed conceptual traffic model and, based on it, an analytical macro-state model of the system in stationary state, with: Bernoulli- Poisson-Pascal input flow; repeated calls; limited number of homogeneous terminals; losses due to abandoned and interrupted dialling, blocked and interrupted switching, not available intent terminal, blocked and abandoned ringing and abandoned conversation. Proposed in this paper approach may help in determination of many network traffic characteristics at session level, in performance evaluation of the next generation mobile networks.
Chapter
A virtual circuit is a connection between two users, devices, or terminals that Junctions as if it were a direct connection. Forwarding, switching, and/or routing over directly-connected circuits takes place at intermediate devices within the virtual circuit, but the details are hidden from the end points. Virtual circuits are widely used in many telecommunications and networking architectures; viz.: in wireline (PSTN, ISDN, BISDN) and wireless (GSM) telephony; in packet-switched networks at various layers (e.g., transport layer connections); in Multiprotocol Label Switched (MPLS) networks where tunnels are a type of virtual circuit; in Asynchronous Transfer Mode (ATM) networks where permanent and switched virtual circuits are fundamental components; in optical networks where wavelength routing and burst switching are abstract forms of provisioned virtual circuits; and in emerging multi-service networks where managed Ethernet virtual circuits are used to bridge legacy technologies like frame relay and ATM. The names of the service stages, branches, and exits used herein to describe and model virtual circuits are borrowed directly from telephony and teletraffic engineering. For example, ‘blocking’ is a branch point in virtual circuit provisioning with counterparts in telephony, ATM, MPLS, Ethernet, and optical networks. The terminology is a convenient way to define a conceptual teletraffic model for these networks. Most of the service stages, branches and exits defined herein have direct counterparts in the data and/or control planes of multi-service networks. In this paper, we define a conceptual model that is sufficiently general for a broad family of virtual circuit switching systems, and we use the model to derive expressions for traffic intensity, blocking probability, and quality of service (QoS) dimensioning of resources. The results are applicable to a number of virtual circuit switching systems and paradigms, and can be used as a basis for terminal and network teletraffic engineering tools for multi-service networks.
92) Network Operational Principles for Future Public Mobile Systems and Services
  • Itu-T Recommendation
Redimensioning of Telecommunication Network based on ITU definition of Quality of Services Concept
  • E T Saranova
Teletraffic Engeneerimg & Network Planning.telenook
  • V Iversen
Designed Probability Determination of Finding B-terminal Busy-Proceedings in DCCN, Sofia, 5-9 Okt
  • E Saranova
  • S Poryazov
Designed Probability Determination of Finding B-terminal Busy - Proceedings in DCCN
  • E Saranova
  • S Poryazov
Redimensioning of Telecommunication Network based on ITU definition of Quality of Services Concept
  • E T Saranova
  • V Vishnevski
  • Hr
  • Daskalova
Traffic Offered Behaviour Regarding Target QoS Parameters in Network Dimensioning - International Journal ITK - ITHEA
  • E T Saranova