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Yuliya Gaidamaka

Yuliya Gaidamaka
Peoples' Friendship University of Russia (RUDN University) · Applied Probability and Informatics

Doctor of Sciences in Physics and Math

About

135
Publications
21,198
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638
Citations
Additional affiliations
July 2018 - present
Peoples' Friendship University of Russia (RUDN University)
Position
  • Professor
September 2014 - June 2018
Peoples' Friendship University of Russia (RUDN University)
Position
  • Professor (Associate)
February 2002 - August 2014
Peoples' Friendship University of Russia (RUDN University)
Position
  • Professor (Associate)

Publications

Publications (135)
Article
Full-text available
Terahertz (THz) band is considered as the main candidate for new radio access technology in sixth-generation (6G) cellular systems. However, the performance of these systems will be severely affected by not only blockage but user equipment (UE) micromobility in hands of a user. The negative effects of these phenomena can be alleviated by utilizing...
Article
Full-text available
Network slicing is a promising technique to enable multi-tenant operation in fifth generation (5G) cellular systems. However, efficient implementation of this technique at the air interface requires an adequate resource allocation policy that provides slice isolation and takes into account the heterogeneity of services and their performance require...
Article
Full-text available
A multi-server infinite buffer queueing system with additional servers (assistants) providing help to the main servers when they encounter problems is considered as the model of real-world systems with customers’ self-service. Such systems are widely used in many areas of human activity. An arrival flow is assumed to be the novel essential generali...
Chapter
In this chapter we study some representative examples of loss systems with random resource requirements (ReLS) developed for performance analysis of 5G radio access networks and especially 5G mmWave communications. The main difference of ReLS from classical service systems is that a customer, beside a server, demands a random amount of some limited...
Chapter
This introductory chapter offers an insight into the techniques of telecommunications performance analysis discussed in the book. Section 1.1 presents a short overview of the Erlang loss formula’s evolution, from telephone trunking modeling to 5G radio access performance evaluation. In the remainder of the chapter, we study some illustrative applic...
Chapter
In this chapter, we begin by studying a ReLS model whose arrival and service rates depend on the number of customers in service. Then, we consider a ReLS in which arrivals and departures are governed by a Markov chain and obtain the necessary and sufficient conditions for the stationary distribution to have a product form. Finally, a simplified tec...
Chapter
In this chapter, we discuss the properties of generator matrices, their exponentials, and generalized inverses. We also study homogeneous and nonhomogeneous systems of linear equations with generator matrices and show how lumpability of the matrix can be used to solve the equations.
Chapter
In this chapter, we introduce Markovian arrival processes (MAPs) and their extensions. MAPs appeared when it became clear that the future methods of stochastic system modeling will be computer-based. Indeed, MAPs are specified by several matrices, which makes them convenient to use when analyzing stochastic systems by matrix-analytical methods. At...
Chapter
This chapter deals with two fundamental models in queueing/teletraffic theory—Erlang’s loss and delay systems. We discuss the Equivalent Random Traffic (ERT) method to estimate blocking probabilities in loss systems with non-Poisson arrivals, which uses the overflow process of Erlang’s loss system to approximate the original non-Poisson arrival pro...
Article
Full-text available
The support of multicast communications in the fifth-generation (5G) New Radio (NR) system poses unique challenges to system designers. Particularly, the highly directional antennas do not allow to serve all the user equipment devices (UEs) that belong to the same multicast session in a single transmission. However, the capability of modern antenna...
Chapter
Network slicing is defined as one of the main components of fifth-generation mobile communications that can solve the problem of colossal growth in data volume traffic in cellular networks. This paper reveals the concept of the probability of slice degradation as the example of a model built using a retrial queueing system. First, we build a mathem...
Article
Full-text available
Terahertz (THz) communications systems are expected to become a major enabling technology at the air interface in sixth-generation (6G) cellular systems. However, utilizing extremely narrow antenna radiation patterns at both base station (BS) and user equipment (UE) sides, these systems are affected by not only dynamic blockage but micromobility of...
Article
Full-text available
Citation: Beschastnyi, V.; Ostrikova, D.; Konyukhov, R.; Golos, E.; Chursin, A.; Moltchanov, D.; Gaidamaka, Y. Quantifying the Density of mmWave NR Deployments for Provisioning Multi-Layer VR Services. Future Internet 2021, 13, 185. https://
Article
Full-text available
To alleviate the impact of outages caused by dynamic blockage of propagation paths in millimeter wave (mmWave) systems, 3GPP has proposed multi-connectivity operation, where user equipment (UE) maintains simultaneous links to both sub-6 GHz and mmWave BSs. We address one of the most challenging prospective deployments – multi-lane street deployment...
Article
Full-text available
We consider a MAP/PH/1-type queueing system with server vacations as a model that is useful for the analysis of multiple access systems with polling discipline without transmission interruption. Vacation of the server corresponds to the service providing competitive information flows to the polling system. In this paper, we consider a vacation queu...
Chapter
Network slicing is defined as one of the main components of fifth-generation mobile communications that can solve the problem of colossal growth in data volume traffic in cellular networks. A key feature of slicing is to limit the effect of one slice on another to provide a high quality of service. Therefore, in this paper, a model for resource sha...
Conference Paper
Full-text available
The paper provides a method for calculating characteristics of a Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol to be used at the Medium Access Control (MAC) layer in an Industrial Internet of Things (IIoT) network. In particular, we consider a set of nodes equipped with sensors, deployed into an industrial machine, and h...
Chapter
Full-text available
With current advancements in communication technologies, video sharing and streaming are increasingly becoming popular among Internet users in applications like social-aware P2P video transmission. Peer-to-Peer (P2P) paradigm was proven to be the promising approach to efficiently deliver streaming services over the Internet. Several P2P-based strea...
Chapter
Full-text available
Current cellular networks face outbreaks of an extremely high demand for communication capacity and coverage during the mass events. This article discusses a scenario with events in remote areas. It is expected that the unmanned aerial vehicles (UAVs) equipped with the directional antennas will become one of the key components of these networks and...
Conference Paper
Full-text available
With recent advancements in communication networks, congestion control remains a research focus. Active Queue Management (AQM) schemes are normally used to manage congestion in routers. Random Early Detection (RED) is the most popular AQM scheme. However, RED lacks self-adaptation mechanism and it is sensitive to parameter settings. Many enhancemen...
Conference Paper
Full-text available
3GPP New Radio (NR) radio access technology operating in millimeter wave (mmWave) frequency band is considered as key enabler for Fifth-generation (5G) mobile system. Despite the enormous available bandwidth potential, mmWave signal transmissions suffer from fundamental technical challenges like severe path loss, sensitivity to blockage, directivit...
Article
Full-text available
Network slicing is a novel key technology in 5G networks which permits to provide a multitude of heterogeneous communication services over a common network infrastructure while satisfying strict Quality of Service (QoS) requirements. Since radio spectrum resources are inherently scarce, the slicing of the radio access network should rely on a flexi...
Article
Full-text available
Queueing systems with random resource requirements, in which an arriving customer, in addition to a server, demands a random amount of resources from a shared resource pool, have proved useful to analyze wireless communication networks. The stationary distributions of such queuing systems are expressed in terms of truncated convolution powers of th...
Conference Paper
Full-text available
Network Slicing is one of the latest technologies of modern telecommunication systems. Network Slicing involves dividing the 5G physical architecture into multiple virtual networks or slices. Each slice has its own characteristics and is aimed at solving a particular business problem. In the nearest future it is expected that Network Slicing princi...
Conference Paper
Full-text available
The article deals with the problem of accessibility of opportunities for personal and professional development, the search for high-quality and relevant educational resources that meet the trends of professional requirements. The possibility of improving the quality of educational content, the development of technologies and formats of educational...
Conference Paper
Full-text available
Effective management of the national educational system is a strategically important direction for further development of the entire state [1]. Management of educational processes is the most difficult direction in the theory and practice of management because of their multiplicity and formalization [2]. In connection with the reorganization of the...
Article
Full-text available
The use of highly directional antenna radiation patterns for both the access point (AP) and the user equipment (UE) in the emerging millimeter-wave (mmWave)-based New Radio (NR) systems is inherently beneficial for unicast transmissions by providing an extension of the coverage range and eventually resulting in lower required NR AP densities. On th...
Chapter
Full-text available
Recently, the use of air base stations located on unmanned aerial vehicles (UAVs) has attracted great attention. Static deployment of a sufficient number of UAVs allows uniform wireless coverage in the demanded areas, where the existing cellular infrastructure has white spots or insufficient capacity. However, UAVs mobility may be required for appl...
Chapter
The numerical simulation of the signal to interference ratio distribution in the wireless D2D communication is analyzed using means of kinetic equation. We consider the model of transmitters and receivers motion, which is mechanically determined, but the distribution function, mentioned above, is non-stationary. The signal to interference ratio for...
Chapter
Prospective 5G New Radio (NR) systems offer unprecedented capacity boost by the ultradense deployments of small cells operating at mmWave frequencies, with massive available bandwidths. They will facilitate the provisioning of exceptionally demanding mission-critical and resource-hungry applications that are envisaged to utilize the 5G communicatio...
Chapter
In this paper a model of a heterogeneous resource queueing system with a Markovian arrival process is considered. The customer accepted for servicing occupies random amount of resource with a given distribution function depending on the class of the customer and on the type of service it needs. At the end of the service, the customer leaves the sys...
Conference Paper
Full-text available
In this paper, we address a problem of 3D directional deafness, which may arise for millimeter-wave (mmWave) devices, e.g., in the contention-based access period of the IEEE 802.11ad/ay protocols. To evaluate the probability of 3D deafness, we develop an analytical framework based on stochastic geometry methods. In particular, we study a minimal fe...
Chapter
Virtual radio resource management system (VRRM) provides optimal sharing of virtualized resources of an infrastructure provider (InP) between several virtual network operators (VNO). One of the main objectives of the VRRM is to optimize the usage of radio access network (RAN) by dynamic sharing between slices in a fair manner according to their con...
Article
Full-text available
Introduction: In 3GPP New Radio (NR) systems, frequent radio propagation path blockages can lead to the disconnection of ongoingsessions already accepted into the system, reducing the quality of service in the network. Controlling access to system resource byprioritizing for the ongoing sessions can increase the session continuity. In this paper, w...
Article
Full-text available
Introduction: One of the main advantages of multiple antenna systems is the support of multi-user connections, simultaneouslytransmitting parallel data streams. This can significantly increase the overall system throughput. However, the spectral efficiency can be additionally increased through the usage of various dynamic strategies which take into...
Conference Paper
Full-text available
This paper investigates scheduling schemes for multiple antenna systems which supported both single and multi-user connections. Based on the discrete queueing models we build the mathematical one with batch arrivals and derive the closed-form expressions for performance metrics. With the proposed method, we analyze the effectiveness of three schedu...
Conference Paper
Full-text available
In a mobile wireless network, the main impact to the dynamics of the received signal power in radio channel is made by the transceivers’ movement. The paper examines the influence of users’ mobility model parameters on the radio channel quality metrics, which include signal-to-interference ratio (SIR) and the stable connection period. The peculiari...
Chapter
In millimeter-wave (mmWave) networks, where faster signal attenuation is compensated by the use of highly directional antennas, the effects of high mobility may seriously harm the link quality and, hence, the overall system performance. In this paper, we study the channel access in unlicensed mmWave networks with mobile clients, with particular emp...
Article
Full-text available
In this paper, we study queueing systems with an infinite and finite number of waiting places that can be modeled by a Quasi-Birth-and-Death process. We derive the conditions under which the stationary distribution for a loss system is a truncation of the stationary distribution of the Quasi-Birth-and-Death process and obtain the stationary distrib...
Article
Full-text available
In this paper, we study a Markovian queuing system consisting of two subsystems of an arbitrary structure. Each subsystem generates a multi-class Markovian arrival process of customers arriving to the other subsystem. We derive the necessary and sufficient conditions for the stationary distribution to be of product form and consider some particular...
Chapter
Full-text available
The recently standardized millimeter wave-based 3GPP New Radio technology is expected to become an enabler for both enhanced Mobile Broadband (eMBB) and ultra-reliable low latency communication (URLLC) services specified to future 5G systems. One of the first steps in mathematical modeling of such systems is the characterization of the session reso...
Preprint
Full-text available
The recently standardized millimeter wave-based 3GPP New Radio technology is expected to become an enabler for both enhanced Mobile Broadband (eMBB) and ultra-reliable low latency communication (URLLC) services specified to future 5G systems. One of the first steps in mathematical modeling of such systems is the characterization of the session reso...
Article
Full-text available
Unmanned aerial vehicle is one of the main announced use cases of 5G/IMT2020, which is expected to have various applications in many fields. These devices have limited capabilities in terms of energy and processing. Due to the complex structure of unmanned aerial vehicle networks and the high mobility constraints, design of efficient routing protoc...
Conference Paper
In this paper we consider random resources queueing system with multicasting designed for the performance analysis of modern telecommunication systems. This is a monoservice loss queueing system with random resource requirements, a finite number of servers and limited amount of resources. The term “overlapping resource requirements” reflects the mu...
Conference Paper
Now rapid growth of number of the devices communicating among themselves in LTE (Long-Term Evolution) networks and also increase in volume of transmitted data is observed. The task of reduction of signal and user load, which is serviced by communication networks is relevant. For this purpose algorithms of the simplified interaction between the user...
Article
Full-text available
The numerical simulation of the distribution of the period before the first break down in the wireless D2D communication is analyzed while the transmitters and receivers are moving in stochastic manner. The random trajectories are generating with the use of non-stationary Fokker-Planck equation for coordinates difference on the finite plane. The ef...
Article
Full-text available
Enabling haptic communication as well as voice and data over the future 5G cellular system has become a demand. Tactile Internet is one of the main use cases of the 5G system that will allow the transfer of haptic communications in real time. Latency, availability, reliability, and security are the main design challenges of the tactile Internet sys...
Article
Full-text available
In this paper, a queueing system with multicast service, random resource requirements and general probability distributions of busy and idle periods is considered. Motivated by challenges from practical applications in the area of performance analysis of telecommunication systems, the model is built on the basis of well-known resource queueing syst...
Conference Paper
We consider empirical distribution functions of non-stationary time-series, depending on set length. The local self-consistent significance level is introduced. The class of time-series, for which the distribution function of significance level is stationary, is considered. For example, the signal-to-interference ratio for random walking subscriber...
Conference Paper
Full-text available
The paper is devoted to the method of determining the simulation duration sufficient for estimating of unknown parameters of the distribution law for given values of the relative error and the confidence level. The method is developed for nonnegative random variables, for nonnegative regenerating sequence and for nonnegative regenerating piecewise-...
Article
The article presents an overview of the resource queuing systems used for modeling of a wide class of real systems with admittedly limited resources. Despite the objective importance of studying of such systems, there have been very few works devoted to their analysis until recently, which was due to the complexity of constructing a random process...
Chapter
In device-to-device communications, the link quality indicators, such as signal-to-interference ratio (SIR) is heavily affected by mobility of users. Conventionally, the mobility model is assumed to be stationary. In this paper, we use kinetic theory to analyze evolution of probability distribution function parameters of SIR in D2D environment unde...
Chapter
In this work, a simplification approach for analysis of queueing systems with random requirements is proposed. The main point of the approach is to keep track of only total amount of occupied system resources. Therefore, we cannot know the exact amount of resources released by the departure of a customer, so we assume it a random variable with cond...