6 research outputs found
Dimensioning of Telecommunication Network Based on Quality of Services Demand and Detailed Behaviour of Users
The aim of this paper is to be determined the network capacity (number of necessary internal switching
lines) based on detailed users’ behaviour and demanded quality of service parameters in an overall
telecommunication system. We consider detailed conceptual and its corresponded analytical traffic model of
telecommunication system with (virtual) circuit switching, in stationary state with generalized input flow, repeated
calls, limited number of homogeneous terminals and losses due to abandoned and interrupted dialing, blocked
and interrupted switching, not available intent terminal, blocked and abandoned ringing (absent called user) and
abandoned conversation.
We propose an analytical - numerical solution for finding the number of internal switching lines and values of the
some basic traffic parameters as a function of telecommunication system state. These parameters are requisite
for maintenance demand level of network quality of service (QoS). Dependencies, based on the numericalanalytical
results are shown graphically.
For proposed conceptual and its corresponding analytical model a network dimensioning task (NDT) is
formulated, solvability of the NDT and the necessary conditions for analytical solution are researched as well. It is
proposed a rule (algorithm) and computer program for calculation of the corresponded number of the internal
switching lines, as well as corresponded values of traffic parameters, making the management of QoS easily
Primary and Secondary Empirical Values in Network Redimensioning
A model of an overall telecommunication network with virtual circuits switching, in stationary state, with
Bernoulli-Poisson-Pascal (BPP) input flow, repeated calls, limited number of homogeneous terminals and 8 types
of losses is considered. One of the main problems of network redimensioning is estimation of the traffic offered in
the network because it reflects on finding of necessary number of equivalent switching lines on the basis of the
consideration of detailed users behavior and target Quality of Service (QoS).
The aim of this paper is to find a new solution of Network Redimensioning Task (NRDT) [4], taking into account
the inconvenience of necessary measurements, not considered in the previous research [5].
The results are applicable for redimensioning of every (virtual) circuit switching telecommunication system, both
for wireline and wireless systems (GSM, PSTN, ISDN and BISDN). For packet - switching networks proposed
approach may be used as a comparison basis and when they work in circuit switching mode (e.g. VoIP)
Traffic Offered Behaviour Regarding Target QOS Parameters in Network Dimensioning
We consider a model of overall telecommunication network with virtual circuits switching, in stationary
state, with Poisson input flow, repeated calls, limited number of homogeneous terminals and 8 types of losses.
One of the main problems of network dimensioning/redimensioning is estimation of traffic offered in network
because it reflects on finding of necessary number of circuit switching lines on the basis of the consideration of
detailed users manners and target Quality of Service (QoS). In this paper we investigate the behaviour of the
traffic offered in a network regarding QoS variables: “probability of blocked switching” and “probability of finding
B-terminals busy”. Numerical dependencies are shown graphically. A network dimensioning task (NDT) is
formulated, solvability of the NDT and the necessary conditions for analytical solution are researched as well.
International Journal "Information Technologies and Knowledge" Vol.2 / 2008
174
The received results make the network dimensioning/redimensioning, based on QoS requirements easily, due to
clearer understanding of important variables behaviour.
The described approach is applicable directly for every (virtual) circuit switching telecommunication system e.g.
GSM, PSTN, ISDN and BISDN. For packet - switching networks, at various layers, proposed approach may be
used as a comparison basis and when they work in circuit switching mode (e.g. VoIP)
Two Approaches to the Traffic Quality Intuitionistic Fuzzy Estimation of Service Compositions
Recently, intuitionistic fuzzy pairs have been used as uncertainty estimations of the request services in service systems. In the present paper, three intuitionistic fuzzy characterizations of virtual service devices are specified: intuitionistic fuzzy traffic estimation, intuitionistic fuzzy flow estimation and intuitionistic fuzzy estimation about probability. Discussed herein are two approaches to the intuitionistic fuzzy estimation of the uncertainty of compositions of services. One of the approaches is based on the definitions of the intuitionistic fuzzy pairs for one service device. The other approach is based on the aggregation operators over intuitionistic fuzzy pairs. A total of six intuitionistic fuzzy estimations of the uncertainty of comprise service device are proposed. The proposed uncertainty estimations allow for the definition of new Quality of Service (QoS) indicators and can be used to determine the quality of service compositions across a wide range of service systems
Two Approaches to the Traffic Quality Intuitionistic Fuzzy Estimation of Service Compositions
Recently, intuitionistic fuzzy pairs have been used as uncertainty estimations of the request services in service systems. In the present paper, three intuitionistic fuzzy characterizations of virtual service devices are specified: intuitionistic fuzzy traffic estimation, intuitionistic fuzzy flow estimation and intuitionistic fuzzy estimation about probability. Discussed herein are two approaches to the intuitionistic fuzzy estimation of the uncertainty of compositions of services. One of the approaches is based on the definitions of the intuitionistic fuzzy pairs for one service device. The other approach is based on the aggregation operators over intuitionistic fuzzy pairs. A total of six intuitionistic fuzzy estimations of the uncertainty of comprise service device are proposed. The proposed uncertainty estimations allow for the definition of new Quality of Service (QoS) indicators and can be used to determine the quality of service compositions across a wide range of service systems