Seferin Mirtchev

Seferin Mirtchev
Technical University of Sofia | TU · Department of Communication Networks

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34
Publications
3,529
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116
Citations

Publications

Publications (34)
Conference Paper
In this paper, a single-server priority queueing system with a peaked arrival process, generally distributed service time and infinite waiting position is analysed by using the Polya distribution to describe the peaked traffic flow. The model of this queueing system is obtained using a generalized Pollaczek-Khinchin formula. In the paper, the depen...
Conference Paper
In this paper¹, a new single-server priority queueing system with a peaked arrival process and generally distributed service time is analysed by using the Polya distribution to describe the peaked traffic flows. The mean waiting time in the case of infinite number of waiting places is obtained using a generalized Pollaczek-Khinchin formula. It is s...
Article
Full-text available
In recent times, with many applications, the IP networks have become the most powerful tool for sharing information. Best-effort IP interconnected networks deliver data according to the available resources, without any assurance of throughput, delay bounds, or reliability requirements. As a result, their performance is highly variable and cannot be...
Article
This paper presents a performance analysis of the end-to-end sensor-to-cloud personal living platform. The analysis is based on a typical architecture starting from a single sensor and actuator and continuing to the virtualized services at smart dust, dew, fog and cloud level. The system is diverse and allows interconnection of different sensors/ a...
Article
The cloud communications are Fiber Channel Technology or Internet-accessed voice, data and video communications where storage, switching and telecommunications applications are hosted by a third-party outside of the end-user devices. The applications are accessed via the Web or other type of interface instead of user’s local storage, independently...
Article
A generalised Pollaczek–Khinchin formula for the Polya/G/1 queue, with a Polya peaked arrival process, general distributed service times, and infinite number of waiting positions, is obtained. It is shown that the peakedness of the number of arrivals and the variance of the service time lead to a significant increase in the service delay and queue...
Article
Full-text available
In this article, a full-access waiting multi-server queue with a statedependent arrival and departure processes is investigated and suggested for use as a generic traffic model of the novel concept of the Enhanced Living Environment as a Service (ELEaaS). The generalized arrival and service flows with nonlinear state dependence intensities are used...
Chapter
This chapter presents data and traffic analyses in 5G networks. We setup experiments with Zigbee sensors and measure different traffic patterns by changing the environmental conditions and number of channels. Due to the differences in read, write operations, message fragmentations and backoff of the Carrier Sense Multiple Access/Collision Avoidance...
Conference Paper
При планирането на капацитета на една MPLS мрежа е необходимо да се гарантира добро качество на обслужване, независимо от това дали тя работи нормално или има наличие на някакви повреди. В доклада се анализират механизмите за диференцирането на услугите, за да се осигури пренасяне на информация за различни приложения с различно качество на обслужва...
Chapter
The aim of this chapter is to present different approaches to network traffic management applicable to the IP, transport and application layers in IP, 3G, WiMAX and 4G technologies. The proposed technology for analysis is flexible enough to different types of traffic in opportunistic networks. We start with traffic measurements and obtain accurate...
Chapter
The aim of this chapter is to present different approaches to network traffic management applicable to the IP, transport and application layers in IP, 3G, WiMAX and 4G technologies. The proposed technology for analysis is flexible enough to different types of traffic in opportunistic networks. We start with traffic measurements and obtain accurate...
Conference Paper
Traffic shaping effect may have significant impact on end-to-end Quality of Service (QoS) provisioning. Therefore, it should be carefully studied in order to allow the creation of appropriate traffic models to be used for simulations. First, to demonstrate the traffic shaping effect, we present statistical analyses on real-time measurements of dive...
Conference Paper
В доклада се използва обобщено разпределение на Парето за генериране на входящия поток от заявки за обслужване и три модално разпределение за симулиране на размера на пакетите. Предложен е симулационен модел в реално време за оценка на стационарните вероятности на състоянията, вероятностите за загуби и закъсненията на системата Pareto/ММ/1/k и резу...
Article
In this paper, we show statistical analyses of several types of traffic sources in a 3G network, namely voice, video and data sources. For each traffic source type, measurements were collected in order to, on the one hand, gain better understanding of the statistical characteristics of the sources and, on the other hand, enable forecasting traffic...
Article
In this paper, we have proposed to use Polya and Pareto distribution to describe peaked arrival processes in telecommunication networks. We have started the work with traffic measurements and analyses. After seeing that the mean, variance, and probability density function of inter-arrival time and packet length change significantly we decided to ap...
Conference Paper
In this paper, we show statistical analyses of several types of traffic sources in a UMTS network, namely, voice, video, and data sources. For each traffic source type measurements were collected in order to, on the one hand, gain better understanding of the statistical characteristics of the sources and, on the other hand, enable forecasting traff...
Article
In this paper, we study the buffer queueing behaviour in high-speed networks. Some limited analytical derivations of queue models have been proposed in literature but their solutions are often a great mathematical challenge. We propose to use the Polya distribution to overcome such limitations. The specific behaviour of an IP interface with bursty...
Article
Full-text available
The importance of IP network will further increase and it will serve as a platform for more and more services, requiring different types and degrees of service quality. In this paper, we investigate the queueing behaviour found in input buffers in IP switch or router. To analyze these types of behaviour, we study the discrete-time version of the "c...
Article
Full-text available
The finding that Pareto distributions are adequate to model Internet packet interarrival times has motivated the proposal of methods to evaluate steady-state performance measures of Pareto/D/1/k queues. Some limited analytical derivation for queue models has been proposed in the literature, but their solutions are often of a great mathematical chal...
Conference Paper
This model belongs to the class of queueing systems with feedback. It is M(g)/D/1/k/S queue with generalised Poisson arrival process, constant service time, single server, limited waiting positions and finite number of customers. We use the generalised input Poisson stream that can be peaked, regular or smooth. This model with quasi-random input st...
Article
A teletraffic model for a full availability loss system with a generalised Poisson input stream is proposed. The idea is based on the analytic continuation of the Poisson distribution and the erlang-B formula. The authors use techniques based on birth and death processes and state-dependent arrival rates. The advantages of simplicity and uniformity...
Article
It is unquestioned that the importance of IP network will further increase and that it will serve as a platform for more and more services, requiring different types and degrees of service quality. Modern architectures and protocols are being standardized, which aims at guaranteeing the quality of service delivered to users. In this paper, we inves...

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