Irina Kochetkova

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

The advancement of cloud computing technologies has positioned virtual machine (VM) migration as a critical area of research, essential for optimizing resource management, bolstering fault tolerance, and ensuring uninterrupted service delivery. This paper offers an exhaustive analysis of VM migration processes within cloud infrastructures, examinin...

Fifth-generation (5G) networks provide network slicing capabilities, enabling the deployment of multiple logically isolated network slices on a single infrastructure platform to meet specific requirements of users. This paper focuses on modeling and analyzing resource capacity planning and reallocation for network slicing, specifically between two...

Fifth-generation (5G) networks require efficient radio resource management (RRM) which should dynamically adapt to the current network load and user needs. Monitoring and forecasting network performance requirements and metrics helps with this task. One of the parameters that highly influences radio resource management is the profile of user traffi...

One of the challenging tasks in 5G networks is to organize a joint URLLC (ultra-reliable and low-latency communication) and eMBB (enhanced mobile broadband) transmission in such a way that provides the priority to URLLC connections. The eMBB users suffer quality of service degradation, primarily bit rate degradation, as well as service interruption...

The reliability characteristics of a k-out-of-n:F system are studied in the case when a failure of one of the system’s components leads to increasing the load on others, resulting in their residual lifetimes decreasing. The situation is modeled with the help of changing the components and the system hazard rate function. The reliability function an...

Ultrareliable and low-latency communication (URLLC) data transmission and enhanced mobile broadband (eMBB) are critical scenarios for the fifth generation (5G) networks. A 5G network resource model was formalized using a triple - radio frequency bandwidth, time slot duration, and the maximum possible power of the transmitted signal. For the scheme...

In the post-industrial economy, the efficiency of scientific knowledge generation becomes crucial. Researchers began to interpret knowledge as a factor of economic growth in the second half of the 20 th century; since then, within the theory of economics and management, various approaches have been developed to study the impact of knowledge on econ...

The data transmission in wireless networks is usually analyzed under the assumption of non-stationary rates. Nevertheless, they strictly depend on the time of day, that is, the intensity of arrival and daily workload profiles confirm this fact. In this article, we consider the process of downloading a file within a single network segment and unstea...

The concept of cloud computing was created to better preserve user privacy and data storage security. However, the resources allocated for processing this data must be optimally allocated. The problem of optimal resource management in the loud computing environment is described in many scientific publications. To solve the problems of optimality of...

In this paper we study the possibility to use the artificial neural networks for trees classification based on real and approximated values of the sap flow density flux describing water transport in trees. The data sets were generated by means of a new tree monitoring system TreeTalker©. The Fourier seriesbased model is used for fitting the data se...

The development and application of smart technologies in various fields is increasing every year. Different monitoring systems and sensors generate a large amount of data sets which allows to solve various tasks on data prediction and classification. This paper deals with data sets generated by a new tree monitoring system Open image in new window...

In this paper, we propose three metrics that could be used for accessing the effectiveness of a dynamic Network Slicing. On the one hand re-slicing could result in more adaptive resource allocation for different virtual network operators (VNO), but could arise the signaling overhead. On the other hand an insufficient amount of re-slicing could sign...

We analyse algorithmic the queueing system with two parallel queues supplied with two heterogeneous group of servers. We assume a controllable cross-connectivity of queues with certain class of customers to different groups of servers. The system is analyzed in steady state. For a given cost structure we formulate the Markov decision problem for an...

Термин «умный город» в последнее время получил широкое распространение в академическом и политическом дискурсе. Тем не менее, по нашему мнению, это скорее маркетинговый термин, объединяющий ряд технологических (и не только) областей: Интернет вещей (IoT), дополненная и виртуальная реальность (AR / VR), сети связи. Сети последнего поколения необходи...

The use of priorities allows us to improve the quality of service of inhomogeneous customers in telecommunication networks, inventory and health-care systems. An important modern direction of research is to analyze systems in which priority of a customer can be changed during his/her stay in the system. We considered a single-server queuing system...

Given the limited frequency band resources and increasing volume of data traffic in modern multiservice networks, finding new and more efficient radio resource management (RRM) mechanisms is becoming indispensable. One of the implemented technologies to solve this problem is the licensed shared access (LSA) technology. LSA allows the spectrum that...

This book constitutes the refereed proceedings of the 25th International Conference on Analytical and Stochastic Modelling Techniques and Applications, ASMTA 2019, held in Moscow, Russia, in October 2019. Methods of analytical and stochastic modelling are widely used in engineering to assess and design various complex systems, like computer and com...

Fifth-generation (5G) networks are characterized by three use cases - massive machine-type communication (mMTC), ultra-reliable low-latency communication (URLLC), and enhanced mobile broadband (eMBB). Quality of service requirements as well as service parameters within these use cases vary significantly, e. g., URLLC is characterized by an ultralow...

As the number of mobile devices increases and new networks technologies emerge, radio spectrum is becoming a rare resource. This stands as the major problem in the development of modern wireless technologies. In recent years, several methods and technologies were implemented to solve this problem, for example the licensed assisted-access (LAA) and...

Expected communication scenarios within the emerging landscape of Internet of Things (IoT) bring the growth of smart devices connected in the communication network. The communication technologies of greatest interest for IoT are known as Low-Power Wide-Area Networks (LPWANs). Today, there are LPWA technologies (Sigfox, Long-Range Wide Area Network...

The article discusses a model for the evaluation of universities and science in general from the point of view of university engagement in the socio-economic environment. The authors conducted a scientometric analysis of the topical area. The primary goal was the identification of various interrelations between some classical scientometric indicato...

In this paper a Markovian queueing system supplied with main and reserve unreliable service facility which we refer to as pools is introduced. Usage of the reserve pool is controlled by a hysteretic policy that depends on upper and lower threshold levels of queue length to increase and decrease the total service rate. The system is analysed as a pr...

5G technology is designed to resolve issues such as the growth of mobile traffic, the increase in the number of devices connected to the network, reducing delays for the implementation of new services and the lack of a frequency spectrum. The main services in future 5G networks are enhanced Mobile Broadband (eMBB), massive Machine Type Communicatio...

The technology of network slicing allows network resources to be distributed among virtual mobile operators in the context of a general increase in the amount of information transmitted. It is important to guarantee the quality of service requirements for user delays. For effective resource sharing, a mathematical and simulation model of a queuing...

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...

The growing traffic of mobile applications that use streaming video and large files makes you think about how you can optimize the process of transferring data from the base station to the mobile device. One way to improve data transfer speed is to use multicasting technology that allows data to be transferred to a subset of users interested in one...

Transition to modern 5G networks under the conditions of limited frequency resources is challenged by the problem of ensuring sustainable high data rates. Multicast technology offers a possible solution to the problem of transferring the same data to the number of devices what results in significant improvement of spectral efficiency and throughput...

Fifth generation (5G) cellular systems are expected to orchestrate a variety of air interfaces. In this heterogenous setting 4G LTE systems will remain of special importance providing service over relatively large area not covered with 3GPP New Radio technology. However, the scarcity of radio resources below 6 GHz as well as constantly increasing u...

Designing Internet of Things (IoT) applications faces many challenges including security, massive traffic, high availability, high reliability and energy constraints. Recent distributed computing paradigms, such as Fog and multi-access edge computing (MEC), software-defined networking (SDN), network virtualization and blockchain can be exploited in...

Currently, information and communication technologies (ICT) deeply penetrate into many areas of modern life. For example, the concept of integrating ICT and the Internet of Things for managing Smart City infrastructure allows city authorities to monitor changes and the situation in the city using sensors. Thus, specialized systems collect data auto...

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...

В связи с быстро растущим числом абонентских устройств, функционирующих в сети беспроводной мобильной связи LTE (Long-Term Evolution), возникла необходимость поиска методов снижения пользовательской и обслуживающей сигнальной нагрузки. Для сокращения объёмов сетевых ресурсов создаются правила, упрощающие взаимодействие устройств внутри сети. В данн...

The paper deals with a Markovian retrial queueing system with a constant retrial rate and two servers. We present the detailed description of the model as well as establish the sufficient conditions for null ergodicity and strong ergodicity of the corresponding process and obtain the upper bounds on the rate of convergence for both situations.

The scarcity of resources available for commercial wireless access systems below 6 GHz coupled with constantly increasing traffic demands from the mobile users force network operators to seek additional spectrum. In addition to moving upper in the frequency band and occupying millimeter wave band with 3GPP New Radio access technology the set of sol...

Looking back on the experience of recent decades, we must recognize that we do not really understand the meaning of the term "engagement." This is especially true for developing countries; in this study we will often refer to Russian examples. Issues of socialization of scientific knowledge were raised in the mid-20th century by the sociologist P....

IoT is a new communication paradigm that gains a very high importance in the past few years. Fog computing is a form of edge computing that is developed to provide the computing, storage and management capabilities near to users. Employing Fog computing in IoT networks as an intermediate layer between IoT devices and the remote cloud becomes a dema...

The growth of machine-to-machine (M2M) type interconnections in future mobile networks, such as 5G, LTE and LTE-Advanced, significantly increases both signaling and user data load on the network infrastructure of operators. The great influence on the radio access network has the transmission of massive Machine-type communications. To reduce the cos...

Enabling haptic communication as well as voice and data over the future 5G cellular system 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. The end-to-end latency of 1ms remain the main challenge toward the Tactile Internet system realization, not onl...

Owing to a steadily increasing demand for efficient spectrum utilization as part of the fifth-generation (5G) cellular concept, it becomes crucial to revise the existing radio spectrum management techniques and provide more flexible solutions for the corresponding challenges. A new wave of spectrum policy reforms can thus be envisaged by producing...

The model of a two-dimensional birth-death process with possible catastrophes is studied. The upper bounds on the rate of convergence in some weighted norms and the corresponding perturbation bounds are obtained. In addition, we consider the detailed description of two examples with 1-periodic intensities and various types of death (service) rates....

Currently, there is a strong demand to augment capacity of mobile cellular deployments as dictated by advanced bandwidth-hungry applications and services. Network densification and the use of millimeter-wave frequencies develop as the mainstream solutions in fifth-generation (5G) systems, but both suffer from increased complexity and cost. A viable...

One of the main design aspects of the Tactile Internet system is the 1 ms end-to-end latency, which is considered as being the main challenge with the system realization. Forced by recent development and capabilities of the fifth generation (5G) cellular system, the Tactile Internet will become a real. One way to overcome the 1 ms latency is to emp...

IoT is a new communication paradigm that gains a very high importance in the past few years. This communication paradigm supports various heterogeneous applications in many fields and with the dramatic increase of the number of sensor devices, it becomes a demand. Designing IoT networks faces many challenges that include security, massive traffic,...

The expected growth in the mobile video (including streaming video, video downloading, conferencing, etc.) now is the key driver for rapid development of 5G wireless network technologies. This paradigm forces wireless networks to manage their resources as effectively as possible. One of the most appropriate solutions for video traffic that may prov...

Public protection and disaster relief (PPDR) situations are becoming increasingly common due to the rapid urbanization of our society. Among these, harsh weather conditions and harmful human activity create challenges for reliable operation of mobile communication infrastructures, which calls for immediate action. The wireless networks of today may...

The new generation of communication technologies, named 5G, brings along a variety of emerging applications and services from both human and machine perspectives. The growing demand for bandwidth in 5G may therefore lead to massive deficiency in wireless spectrum availability despite its under-utilization in urban areas. The Smart City paradigm ass...

Emerging next generation wireless networks involve new applications and services for human-to-human and machine-to-machine (M2M) devices. The problem of increasing requirements for network capacity and lack of radio spectrum arises. The solution could be found in the licensed shared access framework, e. g., in the case of smart cities. The authors...

The volume of mobile traffic is growing every year. More and more frequency resources are needed to provide users services with a required level of quality of service (QoS). One of the possible solutions to a problem of radio spectrum shortage is the sharing of spectrum between the owners and LSA licensees. Licensed shared access (LSA) framework gi...

Nowadays, mobile operators are faced with a problem of shortage of radio resources required for qualitative customer services. One of the possible solutions is the framework named LSA (Licensed Shared Access), which is developed with the assistance of ETSI. The LSA spectrum is shared between the owner (incumbent) and LSA licensee (e.g., mobile netw...

Cellular technologies are promoted by different stakeholders as a key enabler to support vehicle-to-everything communications. In this paper, we shed light into the performance of the LTE (Long Term Evolution) technology in delivering messages generated by vehicles under different network configurations and workload settings. To this purpose, by em...

Tactile Internet requires a round trip latency of 1ms, which considered being the main challenge with the system realization. Forced by recent development and capabilities of the fifth generation (5G) cellular system, the Tactile Internet will become a real. One way to overcome the 1ms latency is to employ a centralized controller in the core of th...

This paper dedicated to SDN modeling and analysis. We analyze the packet delivery time and propose the method to reduce it. We consider delay of packets in SDN switch caused by the processing time. The proposed model represents a packet delay as time which is necessary for the searching in the routing table. Processing time depends on the routing t...

The fast spreading of new multimedia services and applications is pushing telco operator to identify candidate technologies for handling the increasing traffic load expected in the coming years. Along this line, satellite communications integrated with terrestrial systems is gaining momentum as a possible solution to overcome the aforementioned cha...

The modern development of the telecommunication technologies is closely related with the rapid data traffic growth problem under the conditions of limited frequency resources for mobile networks. One of the possible solutions to this problem is the utilization of the Licensed Shared Access (LSA) framework, which is developed with the assistance of...

Nowadays, mobile operators are faced with a problem of shortage of radio resources required for qualitative customer services. One of the possible solutions to this problem is the framework named LSA (Licensed Shared Access), which is proposed by ETSI. In this paper we describe two possible Radio Admission Control scheme models of the 3GPP LTE cell...

Current IT development is closely associated with the question of rapid increasing of transmitted data volume in the context of mobile networks frequency band limitation. Shortage of system resources, which are required for provision services with a high Quality of Service (QoS) and Quality of Experience (QoE) to users, leads to data rate reduction...

Machine-type communication (MTC) is a new service defined by the 3rd Generation Partnership Project (3GPP) to provide machines to interact to each other over future wireless networks. One of the main problems in LTE-advanced networks is the distribution of a limited number of radio resources among enormously increasing number of MTC devices with di...

The concept of getting services and applications at “any time” and at “any place” requires the corresponding development of cellular networks, namely in LTE networks. At present, there is a lack of quality of service related recommendations describing various popular services, e.g., video conferencing. The problem is to find the optimal bit rate va...

Shared access to spectrum by several parties seems to become one of the most promising approaches to solve the problem of radio spectrum shortage. The framework proposed by ETSI, licensed shared access (LSA), gives the owner absolute priority in spectrum access, to the detriment of the secondary user, LSA licensee. The latter can access the spectru...

Licensed shared access (LSA) framework is becoming one of the promising trends for future 5G wireless networks. Two main parties are involved in the process of sharing the frequency band – the primarily user (owner) and the secondary user (licensee). From the LSA licensee’s perspective, who has access to the band when the owner does not need it, th...

Machine type communications (MTC) or machine-to-machine (M2M) services become one of the drivers towards 5th generation (5G) wireless network. Various MTC devices such as smart meters and sensors form the basis of smart cites and homes. The question is how to efficiently transmit the information from MTC devices via a wireless network, which is pri...

Processor sharing (PS) queuing systems and particularly their well-known class of egalitarian processor (EPS) sharing are widely investigated by research community and applied for the analysis of wire and wireless communication systems and networks. The same can be said for queuing systems in random environment, with unreliable servers, interruptio...

By the means of the method of stochastization of one-step processes we get the simplified mathematical model of the original stochastic system. We can explore these models by standard methods, as opposed to the original system. The process of stochastization depends on the type of the system under study. We want to get a unified abstract formalism...

Users of wireless 3GPP LTE networks are provided with a wide range of multimedia services with varying QoS requirements; due to this fact a problem of an effective network resources’ distribution arises and, consequently, a task of the optimal RAC schemes development. According to the international standards, two types of services are defined withi...

Processor sharing (PS) queuing systems are widely investigated by research community and applied for the analysis of wire and wireless communication systems and networks. Nevertheless, only few works focus on finite queues with both PS discipline and service interruptions. In the paper, compared with the previous results we analyze a finite capacit...

Users of wireless 3GPP LTE networks are provided with a wide range of multimedia services with varying QoS requirements; due to this fact a problem of an effective network resources' distribution arises and, consequently, a task of the optimal RAC schemes development. According to the international standards, two types of services are defined withi...

In the paper, M2M traffic characteristics in LTE mobile network are investigated. A specific resource scheduler based on the full power policy is considered. For the considered scheduler, the cumulative distribution function of resource requirements of M2M sessions is derived. Then, we approximate it by gamma distribution, which is used to evaluate...

Users of 3GPP LTE networks are provided with a wide range of multimedia services with varying QoS requirements; due to this fact a problem of an effective network resources’ distribution arises and, consequently, a task of the optimal RAC schemes development. According to the international standards, two types of services are defined within LTE net...

As it is predicted that mobile traffic demand will reach an astonishing 190 exabytes by 2018, current methods of spectrum allocation and management need to be rethought towards more advanced sharing of frequency bands. To this end, a novel regulatory framework has recently emerged, named Licensed Shared Access (LSA), which enables guaranteed spectr...

While queuing theory has indeed been instrumental to various communication problems for over half a century, the unprecedented proliferation of wireless technology in the last decades brought along novel research challenges, where user location has become a crucial factor in determining the respective system performance. This recent shift turned im...

As the demand for higher bit rates in LTE networks increases, new technologies to enhance the effectiveness of radio resource utilization are introduced. One of them is Multimedia Broadcast Multicast Service (MBMS) that enables the usage of multicast technology for multiple resource demanding services, e.g. file repair procedure, intended for resen...

In this work, we study a cellular system (e.g., 3GPP LTE-Advanced), which concurrently serves machine-to-machine (M2M) and human-to-human (H2H) traffic. Our study focuses on uplink transmissions of M2M and H2H devices sending their data “files” and streaming sessions to the network, respectively. Together with traffic dynamics, we account for the s...

Mobile data traffic is predicted to have an exponential growth during at least 5 upcoming years. Under these circumstances, new spectrum reuse techniques are being developed. One of these techniques is Licensed Shared Access (LSA) enabling the usage of the same spectrum by two parties. At any moment, the spectrum is used only by one party, so that...