Rossitza Goleva

Rossitza Goleva
New Bulgarian University | NBU · Department of Informatics

PhD

About

60
Publications
8,786
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
439
Citations

Publications

Publications (60)
Book
This book constitutes the proceedings of the 7th International Conference on Internet of Things (IoT) Technologies for HealthCare, HealthyIoT 2020, held in Viana do Castello, Portugal, in December 2020. Due to Covid-19 pandemic the conference was held virtually. The IoT as a set of existing and emerging technologies, notions and services can provid...
Preprint
Full-text available
The User Datagram Protocol (UDP) and other similar protocols send the application data from the source machine to the destination machine inside segments, without foreseeing nor allowing for any type of control on the transmission or success metrics. These protocols are very convenient for e.g. real time data transmission. But when the reliability...
Book
This book constitutes the proceedings of the 6th International Conference on Internet of Things (IoT) Technologies for HealthCare, HealthyIoT 2019, held in Braga, Portugal, in December 2019. The IoT as a set of existing and emerging technologies, notions and services can provide many solutions to delivery of electronic healthcare, patient care, and...
Book
This open access book is the final publication of the COST Action IC1303 “Algorithms, Architectures and Platforms for Enhanced Living Environments (AAPELE)” project. Ambient Assisted Living (AAL) is an area of research based on Information and Communication Technologies (ICT), medical research, and sociological research. AAL is based on the notion...
Article
Full-text available
Departing from the well-known problem of the excessive overhead and latency of connection oriented protocols, this paper describes a new almost reliable connectionless protocol that uses User Datagram Protocol (UDP) segment format and is UDP compatible. The problem is presented and described, the motivation, the possible areas of interest and the c...
Chapter
Full-text available
With the increasing number of scientific publications, the analysis of the trends and the state-of-the-art in a certain scientific field is becoming very time-consuming and tedious task. In response to urgent needs of information, for which the existing systematic review model does not well, several other review types have emerged, namely the rapid...
Chapter
Nowadays, sensors, algorithms and software applications are embedded in people’s everyday lives. To be more precise, living environment is significantly dependent on previously mentioned technology especially in the field of medicine. The ultimate goal of this research is to collect data from different medical sensors platform, which can be used in...
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
Full-text available
Ambient Assisted Living (AAL) environments rely on ambient sensing and environment control to enable elderly people to continue to live in their preferred environments. Unlike smart homes where the target audience is usually a family unit, AAL goal is to be able to interact with care receivers and care providers. This provides possibility in case o...
Conference Paper
The aim of this work is to show the implementation of LoRa sensors in forest fire detection using fixed and mobile field gateways on watch towers and drones.
Article
Full-text available
Background Off-the-shelf-mobile devices have several sensors available onboard that may be used for the recognition of Activities of Daily Living (ADL) and the environments where they are performed. This research is focused on the development of Ambient Assisted Living (AAL) systems, using mobile devices for the acquisition of the different types o...
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
An increase in the accuracy of identification of Activities of Daily Living (ADL) is very important for different goals of Enhanced Living Environments and for Ambient Assisted Living (AAL) tasks. This increase may be achieved through identification of the surrounding environment. Although this is usually used to identify the location, ADL recognit...
Chapter
The constant technological innovations in wireless communications and network technologies as well as the increasing number of smart mobile devices generate an enormous volume of data stemming from a set of user equipments (UEs). Since an exponential growth of data and analytics is witnessed, new technical and application challenges emerge associat...
Chapter
This chapter elaborates on radio resource management issues for an optimum frequency portion exploitation and maximum energy conservation in a centralised cognitive radio network architecture. Two optimisation algorithms are provided that enable the efficient use of TV White Spaces (TVWS) through a broker entity that coordinates the spectrum tradin...
Chapter
The immense network of interconnected objects, called the Internet of Things (IoT), will eventually become a reality thanks to the MP2P (Mobile Peer-to-Peer) nature of the upcoming 5G and it will have the potential of growing into a valuable asset and revolutionize a plethora of fields. Due to its omnipresent character, the IoT can be successfully...
Chapter
The described platform is not a single product in the cloud but generic specification of many existing platforms and their possible extended internetworked versions. The chapter identifies main platform building blocks and is not limited to sensor networks, wire and wireless communication infrastructure for AAL services, requirement analysis, stake...
Chapter
This chapter presents possible use-case scenarios for end-user testing, verification and validation of Ambient Assisted Living and Enhanced Living Environment (AAL/ELE) platforms and services. It consists of many use-case scenarios related to the functionality, connectivity, interoperability, interfaces, and protocols against end-user specific requ...
Chapter
Enhanced Living Environments (ELE) encompass all Information and Communications Technologies' (ICT) achievements supporting true Ambient Assisted Living (AAL) environments. It is an umbrella for the infrastructures and services needed to sustain independent and more autonomous living, via seamless integration of ICT within homes and residences. For...
Chapter
The rapidly aging population, especially in Europe, and the increasing financial expenses of providing medical care and assistance to the disabled increase the search for novel systems to provide self-care and home-care. The progress of mobile technologies, sensors, computer networks and eventually cloud computing provides the infrastructure for su...
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...
Book
Enhanced living environments employ information and communications technologies to support true ambient assisted living for adults and people with disabilities. Infrastructure and services for autonomous living are provided via the seamless integration of ICT within homes and residences, and through new and innovative connected solutions, particula...
Article
Full-text available
Ambient Assisted Living (AAL) is promising to become a supplement of the current care models, providing enhanced living experience to people within context-aware homes and smart environments. Activity recognition based on sensory data in AAL systems is an important task because: it can be used for estimation of levels of physical activity; can lead...
Book
Ambient Assisted Living and Enhanced Living Environments: Principles, Technologies and Control separates the theoretical concepts concerning the design of such systems from their real-world implementations. For each important topic, the book bridges theory and practice, introducing the instruments needed by professionals in their activities. To thi...
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...
Preprint
UNSTRUCTURED The increased availability of devices that can record every aspect of a person’s life will allow the recording of a large amount of data that will be primarily useful for that particular user. These devices and their data will place each and every one of us at the doorstep of the era of personal big data. Using this data, in a not so d...
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...
Chapter
The aim of this paper is to present an idea of open platform for Enhanced Living Environment that will allow flexible and reliable use of the cloud-computing, sensor, mobile, local and body area networks for highly customized services and applications. The platform architecture consists of sensors working on IEEE 802.15.4, ZigBee, EnOcean standards...
Conference Paper
The aim of this paper is to present an idea of the platform for enhanced living environment that will allow flexible and reliable use of cloud computing and sensor networks for highly customized services and applications. The architecture is based on sensors using IEEE 802.15.4 and zigbee protocols. Furthermore, the access to the cloud could be don...
Chapter
Resource management schemes in current data centers, including cloud environments, are not well equipped to handle the dynamic variation in traffic caused by the large diversity of traffic sources, source mobility patterns, and underlying network characteristics. Part of the problem is lacking knowledge on the traffic source behaviour and its prope...
Book
This book constitutes the post-proceedings of the 6th International ICST Conference on Mobile Networks and Management, MONAMI 2014, held in Würzburg, Germany, in September 2014. The 22 revised full papers presented were carefully reviewed and selected from 30 submissions. In addition, MONAMI 2014 hosted a workshop on enhanced living environments wh...
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
This paper represents VoIP shaping analyses in devices that apply the three Quality of Service techniques – IntServ, DiffServ and RSVP. The results show queue management and packet stream shaping based on simulation of the three mostly demanded services – VoIP, LAN emulation and transaction exchange. Special attention is paid to the VoIP as the mos...
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...

Projects

Projects (7)
Archived project
Project
Review of books of colleagues