Emiliya Saranova

Emiliya Saranova
Bulgarian Academy of Sciences | BAS · Department of Informational Modeling

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33
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76
Citations

Publications

Publications (33)
Chapter
The problem of conceptual optimization of Generalized Nets (GNs) models is discussed. An overview of some operators for complexity of GNs and relations with respect to them is presented. Some new operators and relations are defined. The proposed approach to the conceptual optimization of GN models is applied to a GN model of a queuing system with f...
Chapter
Generalized Net (GN) model of overall telecommunication system with queuing is proposed. It is based on the classical conceptual model of overall telecommunication system which considers user’s behaviour, finite number of users and terminals, losses due to abandoned and interrupted dialing, blocked and interrupted switching, unavailable intent term...
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...
Chapter
For the first time a queue, related to the shortage of network resources, is included in a model of overall telecommunication system with finite number of users and facilities which makes the model closer to the real system. The service in the queue depends on feedbacks of call attempts and of the state and duration of services in the overall syste...
Conference Paper
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A number of vague terms and uncertainties could be found in the recent data protection legislation, concerning the field of data breaches. Specific interest are opening the issues of qualitative and quantitative understandings of terms like: 'risk to the rights and freedoms of natural persons', 'criteria for data security', 'appropriate technical a...
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 presentatio...
Chapter
Conceptual and analytical models of an overall telecommunication system are utilized in this chapter for the definition of scalable indicators towards Quality of Service (QoS) monitoring, prediction, and management. The telecommunication system is considered on different levels – service phase, service stage, network, and overall system. The networ...
Conference Paper
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This paper explores a model of overall telecommunication systems, including users, terminals, and a network with Quality of Service (QoS) guaranties. Apart from GSM, BSDN and others, generalized virtual networks (VNET) with overall QoS guaranties have been considered also. In our approach, the network traffic, terminal traffic for A (calling) and B...
Article
Full-text available
Today more and more complex services are proposed by the companies. At the same time customer needs are changing rapidly over the time. In all service sectors the service providers used to provide services satisfying Quality of Service (QoS) requirements. In this paper we present results of conducted literal review related to composition of service...
Conference Paper
Full-text available
Recently many of encryption algorithms were discredited and digital data storages and data transfer become questionable. A lot of protected private information became available to wide audience. The last 2016 year was the year of many hacker attacks. Even carefully designed block ciphering algorithm like Data Encryption Standard (DES) was cracked o...
Conference Paper
Different approaches to conceptual modeling of overall telecommunication systems with QoS guarantees are discussed. Generalized Nets (GNs) are used as an alternative to the already existing conceptual models based on the Service Networks Theory. Two GN representations of a part of the Switching stage are proposed and their advantages and disadvanta...
Conference Paper
The aim of this paper is to point out and summarise existing problems and research trends that arise when assessing and ensuring quality of information services. On the focus of this work are smart buildings. Basic information functions that are composed in different services are described. The sets and structures of the composition form various sc...
Conference Paper
One of the problems of user experience prognostication in telecommunication services is the selection of Quality of Service (QoS) indicators, more reflecting users' experience, not the network providers' one. In this paper, we propose definitions and analytical expressions of four new overall network QoS time and traffic efficiency indicators, comp...
Article
Full-text available
Enhancing the hardware power does not cause linear enhancing of the informational services' performance. To discover the value of growth, one has to test both source and enhanced systems running equal or similar services. If we need to discover the growth of services' performance for different computers' configurations we have to have common basis...
Article
Overall telecommunication network performance for virtual networks with quality of services (QoS) guaranties is considered. Experimental use of a computer algebra system is discussed. The numerical results of three main efficiency parameters of the overall network are presented as functions of the network state in the whole theoretically possible i...
Article
A model of an overall virtual telecommunication network (VNET), with Quality of Service (QoS) guaranties for Class 0 traffic is considered. There are two methods for such network resources re-dimensioning recommended by the International Telecommunication Union - Standardization Sector (ITU-T). Numerical accuracy analysis of the Cisco variations of...
Conference Paper
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 appr...
Article
Full-text available
Network redimensioning (medium term planning) means to determine volume of telecommunication resources, necessary to serve given traffic offered taking into account the prescribe Quality of services (QoS). Two different network redimensioning methods are considered in this paper. The aim of the research is comparison between network redimensioning...
Chapter
One of the main problems that has to be solved by network operators is how to determine the volume of telecommunication resources that are sufficient to serve a given input flow of demands with prescribed characteristics of QoS (Quality of Service). Usually the resource considered is the number of circuits, the value of bandwidth represented by an...
Article
Full-text available
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) c...
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 t...
Chapter
In this paper a telecommunication system with (virtual) channel switching, heterogeneous users and with Poisson input flow is studied in stationary state. It is assumed that unsuccessful calling attempts resulting from abandoned dialing, abandoned ringing, blocked and abandoned conversation situations are not repeated. A model for such a telecommun...
Article
Full-text available
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 beca...
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...

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Projects (2)
Archived project
Project
Развитие на методиките за концептуално моделиране на обслужващи системи (особено информатични), която включва: • представяне на услугите като композиция на базови функции, които натоварват последователно и/или паралелно ресурсите на обслужващата система. • съпоставяне на поисканите от потребителите услуги и наличните ресурси в обслужващата система, които биха ги реализирали. • Определяне на търсенето на услуги и очакваното (почувствано) качество(Quality of Experience–QoE) на предоставените услуги.