Albena Mihovska

Albena Mihovska
Aarhus University | AU · BTECH

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98
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Publications

Publications (98)
Chapter
Monitoring of patient health data is an important part of the medical treatment of a patient. This paper studies how wireless smart technology for patient monitoring can be used and implemented in a hospital setup. The research focuses on the patients and the clinical perspective on how wireless monitoring of health data in the hospital can be util...
Chapter
The trends in healthcare are continuously evolving towards a virtually rich personalized experience that involves human-to-human (H2H), human-to-machine (H2M) and machine-to-machine (M2M) interactions. This article proposes a platform that fosters an ecosystem of games and applies them to real-life situations to motivate an active lifestyle in elde...
Article
In this paper, we characterize the worst-case interference for a finite-area TV white space heterogeneous network using the tools of stochastic geometry. We derive closed-form expressions on the probability distribution function (PDF) and an average value of the aggregate interference for various values of path loss exponent under Rayleigh fading c...
Book
Full-text available
The term "Internet of Things" (IoT) refers to an ecosystem of interconnected physical objects and devices that are accessible through the Internet and can communicate with each other. The main strength of the IoT vision is the high impact it has created and will continue to do so on several aspects of the everyday life and behavior of its potential...
Chapter
This paper analyzes the performances of a proposed set of functions that model the relay selection process in a cooperative communication scenario. The proposed behavior and influence functions create a mechanism for selecting the best relays to be used to send certain types of data. The mechanism is based on a Nash Equilibrium (NE) algorithm and o...
Preprint
In this paper, we characterize the worst-case interference for a finite-area TV white space heterogeneous network using the tools of stochastic geometry. We derive closed-form expressions on the probability distribution function (PDF) and an average value of the aggregate interference for various values of path loss exponent. The proposed character...
Chapter
The IoT scenario is characterized with ultra-dense interworking of billions and billions of devices through a myriad of technologies for the delivery of smart personalized services and applications. The main challenges and distinctive features of this scenario are the large amount of information gathered from the ambient environment and the human b...
Article
Full-text available
Since its dawn in mid-1980’s, till the present time, the mobile cellular communication (MCC) has been following a common silhouette of the network architecture. In every generation of mobile cellular technology, the final radiating elements or antennas are exclusively mapped to their respective base stations (BS). Moreover, in earlier generations o...
Article
Full-text available
Future mobile communication networks are expected to be more intelligent and proactive based on new capabilities that increase agility and performance. However, for any successful mobile network service, the dexterity in network deployment is a key factor. The efficiency of the network planning depends on how congruent the chosen path loss model an...
Article
Multiple spectrum measurement campaigns around the world have shown that even though the frequencies below 6 GHz are very crowded, enough portions of the spectrum remain unutilized most of the time. Even the most heavily employed bands, such as the ones used for television broadcasting and cellular communications, have shown an average occupancy be...
Article
Full-text available
Independent living of older adults is one of the main challenges linked to the ageing population. Especially those living with diseases like COPD, MCI or frailty, need more support in everyday life and this is by itself a big societal challenge with impact in multiple sectors. In this paper we present eWALL, an innovative open-source eHealth platfo...
Article
Full-text available
The explosive growth of wireless communications lately imposes novel challenges for radio spectrum usage and policing. Many new communication scenarios have emerged that necessitate techniques for precise spectrum availability estimation and subsequent optimal spectrum sharing. For this purpose, estimating and validating the spectrum availability a...
Chapter
The current Internet of Things (IoT) concept is characterized with billions and billions of devices interworking through a myriad of technologies for the delivery of smart personalized services and applications. At the center of these is the human user who drives his/her own interconnected cluster. It can be expected in the future that the number o...
Chapter
The current Internet of Things (IoT) concept is characterized with billions and billions of devices interworking through a myriad of technologies for the delivery of smart personalized services and applications. At the center of these is the human user who drives his/her own interconnected cluster. It can be expected in the future that the number o...
Conference Paper
In this paper we derive a clustering method based on the Hidden Conditional Random Field (HCRF) model in order to maximizes the performance of a wireless sensor. Our novel approach to clustering in this paper is in the application of an index invariant graph that we defined in a previous work and that precisely links a hyper-tree structure to the d...
Conference Paper
Full-text available
In 2010 IEEE 802.11ah working group has started with work on designing their first standard in sub-GHz spectrum, with the goal to bring a WLAN standard with extended range, which, among other things, could provide communication services in the area of IoT applications. Enhancements of achievable communication range in IEEE 802.11ah are results of m...
Conference Paper
Full-text available
The traditional ant routing protocol provides an efficient way for dynamic routing in continuously changing networks. Due to their social behaviour, ants tend to find optimized paths based on network status information such as the path length and capacity. However, the conventional ant routing protocol tends to satisfy acceptable Quality of Service...
Conference Paper
Full-text available
Partial discharge (PD) is one of the predominant factors to be controlled to ensure reliability and undisrupted functions of power generators, motors, Gas Insulated Switchgear (GIS) and grid connected power distribution equipment, especially in the future smart grid. The emergence of wireless technology has provided numerous opportunities to optimi...
Chapter
Recommendation systems suggest items and users of interest based on preferences of items or users and item or user attributes. In social media-based services of dynamic content (such as news, blog, video, movies, books, etc.), recommender systems face the problem of discovering new items, new users, and both, a problem known as a cold start problem...
Conference Paper
Heterogeneous networks (HetNets) have been proposed as a capacity and coverage enabler in LTE-Advanced and beyond communication networks. Their optimal operation requires a significant degree of self-organization. Autonomic Load Balancing (ALB) has been proposed as an important self-organizing (SON) function in the LTE radio access network (RAN). I...
Conference Paper
The unplanned deployment of small cells is leading to high levels of intra- and inter-tier interference. An insight on how to manage the interference is vital to reach a significant capacity improvement through ultra-dense networks. This paper considers heterogeneous networks with carrier aggregation, where the macro cells operate at 800 MHz to pro...
Conference Paper
The use of social networking applications has been multiplied hugely in the last decade. Social networking applications build upon the mobile presence services to enable human communications over a distance in real or non-real time. Presence enabled applications enable to publish and retrieve the context information such as online/offline standing,...
Article
The expectations for the Internet of Things (IoT) and its capabilities are central to a lot of research efforts at the moment. The main concern is the realization of autonomous decision-making and successful communication establishment between the resource-constrained nodes, present in such a dynamic network architecture. The focus is turned to the...
Article
This paper proposes a methodology for resource consolidation towards minimizing the power consumption in a large network, with a substantial resource overprovisioning. The focus is on the operation of the core MPLS networks. The proposed approach is based on a software defined networking (SDN) scheme with a reconfigurable centralized controller, wh...
Article
Wireless radio-based communication technologies have drastically evolved over the past decades to deliver lower cost, higher efficiency, enhanced quality of experience and diversified smart services (e.g., ambient assisted living, smart grid, e-health). The future development of these technologies faces multi-fold challenges, which are determined b...
Article
Independent living of senior citizens is one of the main challenges linked to the ageing population. Senior citizens may suffer from a number of diseases, including the decline in cardiopulmonary conditions, weaker muscle functions and a declined neuromuscular control of the movements, which result in a higher risk of fall and a higher vulnerabilit...
Article
A reliable solution for meeting the high demand of throughput in areas called hotspots is the heterogeneous network. Heterogeneous networks are different depending on their coverage, their type of radio access technique and the way there are connected to the core network. This paper proposes a novel algorithm for semi-coordinated resource allocatio...
Article
Despite of their energy efficiency, most of WSN’s cluster-based routing protocols are vulnerable to security threats. Selective forwarding and black hole attacks are ranked among the most devastating attacks which they target this class of routing protocols. In this paper, a new centralized intrusion detection system is proposed to detect selective...
Conference Paper
The challenges faced by standardization in relation to the potential of wireless communication technologies to deliver lower cost, higher efficiency, enhanced quality of experience and diversified smart e-Health services, are multi-fold and determined by the complexity of the myriad of emerging user and usage scenarios. In addition, there is the ch...
Article
LTE-Advanced aims to provide a transmission bandwidth of 100 MHz by using carrier aggregation to aggregate LTE Rel. 8 carriers. In order to increase the system capacity, resource allocation becomes a very good tool, and, in the context of the existence of multiple component carriers in LTE-Advanced becomes a complex optimization problem. This paper...
Article
Incorporation of the geographical positions of mobile users into the resource assignment process in uncoordinated heterogeneous cell deployments, can lead to significant improvements of cell and user throughputs. This paper proposes a novel algorithm that combines the knowledge of the users' positions with a Q-learning and game-theoretic approaches...
Article
Innovations are the driving force for fundamental changes and development of future generation telecommunication networks. When considering innovations as drivers for the development of next generation telecommunication networks an important question is whether an innovative emerging technology would cause a disruption requiring fundamental change...
Article
With the advent of high efficacy light emitting diode directional lamps as a key component in focal lighting, new possibilities emerge for re-designing the smart home scenario. A smart home scenario is characterized by enabled intelligent interworking of various wireless and wired technologies to provide inhabitants with ease of use of appliances,...
Article
Independent living of senior citizens is one of the main challenges linked to the ageing population, due to the impact on: (1) the life of the elderly people, (2) the national health systems, (3) the insurance companies, (4) the relatives and (5) the care-givers. Senior citizens may suffer from a number of diseases, including the decline in cardiop...
Article
Distributed Antenna Systems (DAS) is one of the most promising ways of network deployment now-a-days. Mostly it is used in indoor environment for shopping areas and office locations. Here the Outdoor application of DAS, where multiple service providers can install their Base Transceiver Station (BTS)/Nodes at one location known as BTS hotel and the...
Article
An internet of things (IoT) scenario is characterized by heterogeneity found in the types of participating nodes, networks and type of data exchange. This creates a complicated scenario in relation to decision making, management and reliability. The proposed paper focuses on the design and evaluation of a management framework for an IoT scenario. T...
Conference Paper
The growing demand of throughput, coverage and capacity has motivated the deployment of small cells as a cheaper option to macro base stations. Such heterogeneous scenario has also introduced novel advanced resource allocation and load balancing mechanisms for increased system performance. This paper proposes an approach to optimizing network perfo...
Conference Paper
Full-text available
For more than a decade, the relevance of the "state of emergency" for the environment due to CO2 emissions has been setting the targets for climate action also reflected by the Directive 2010/31 / EU Energy Efficiency, among others. Radio Base Stations (RBS) should meet an energy target, while consumer nodes should become renewable energy generator...
Conference Paper
This paper determines the cost/revenue performance of a mobile communication system in an IMT-Advanced scenario with integrated Common Radio Resource Management (iCRRM). The iCRRM performs classic CRRM functionalities jointly with Spectrum Aggregation (SA), being able to switch users between non-contiguous frequency bands. The SA scheduling is obta...
Conference Paper
Cloud computing has been considered as a solution for solving enterprise application distribution and configuration challenges in the traditional software sales model. In order to provide services by cloud systems to mission-critical areas, such as e-administration, medical care and finance, it is essential to meet demands for guaranteed end-to-end...
Conference Paper
A main characteristic of the Internet of Things networks is the large number of resource-constrained nodes, which, however, are required to perform reliable and fast data exchange; often of critical nature; over highly unpredictable and dynamic connections and network topologies. Reducing the number of message exchanges and retransmission of data,...
Article
CONASENSE stands for Communication, Navigation, Sensing and Services andisanewscientificsocietyencouragingcross-cuttingresearchamongthese four domains. For each domain, the paper shows examples of the interaction with the other domains, highlighting recent advances, trends, and challenges, importance to Future Generation Wireless and other new rese...
Conference Paper
This paper proposes an energy consumption improvement algorithm based on a coefficient determining the reliability of offloading users to a new base station (BS) regarding the additional power needed for them to be compensated during an offload from pico BS (PBS) to macro BS (MBS) in uncoordinated deployment of heterogeneous networks (HetNet). The...
Conference Paper
The electromagnetic spectrum is a scarce resource that needs to be efficiently and effectively reused to allow the provider the necessary conditions to satisfy its customers increasing demands. It is vital that the reuse of the spectrum does not lead to high interference scenarios. The use of heterogeneous networks (HetNets) allows a better spatial...
Conference Paper
Cell load imbalances in wireless networks degrade performance. Macro and small cell collocated deployments (heterogeneous scenario) constitutes a new problem for load balancing. This paper proposes a novel admission control algorithm for an optimal solution to the assignment of traffic flows. It jointly performs congestion control and inter-cell in...
Conference Paper
This paper proposes a novel algorithm for dynamic physical resource allocation based on the use of positioning information during carrier aggregation (CA) in a semi-and uncoordinated deployment of heterogeneous networks (HetNet). The algorithm uses the known Q-learning method enhanced with information but the locations of the mobile users and neigh...
Conference Paper
LTE-Advanced aims to provide a transmission bandwidth of 100 MHz by using Carrier Aggregation to aggregate LTE Rel. 8 carriers. In order to increase the system capacity, resource allocation becomes a very good tool, and, in the context of the existence of multiple Component Carriers in LTE-Advanced becomes a complex optimization problem. This paper...
Article
Mobile devices have steadily gained acceptance as a multimedia platform, not only that, one of the most valuable pieces of contextual information for an intelligent mobile application is the user's location. The university campus is an interesting application ...
Conference Paper
Cloud computing refers to the ability to access and manage information stored on remote servers, using any Internet-enabled platform, including smart phones. In the cloud, any user can can access and/or remotely store respective data with minimal management effort or service provider interaction. Without the knowledge of the physical location of th...
Conference Paper
This paper provides a comparative overview of two short-range wireless technologies with high potential for use in various data-intensive and security-sensitive applications, namely, ultra wideband (UWB) and visible light communications (VLC). Both are emerging technologies with some unique features that draw a great research and commercial interes...
Conference Paper
In cognitive radio (CR) systems communication is not restricted to pre-assigned channels, but is rather able to opportunistically detect and use appropriate portions of spectrum. Although much research effort has been put into this new technology, the technical focus has been mainly directed towards pushing further the attainable spectral efficienc...
Article
Full-text available
This paper proposes an Integrated Common Radio Resource Management (iCRRM). The iCRRM performs classic CRRM functionalities jointly with Spectrum Aggregation (SA), being able to switch users between non-contiguous frequency bands. The SA scheduling is obtained with an optimised General Multi-Band Scheduling algorithm with the aim of cell throughput...
Conference Paper
Two main draft standards were submitted in October 2009 as candidate technologies for IMT-Advanced, namely IEEE 802.16m and 3GPP LTE-Advanced. However, several details on their functionalities are still open and the research community is racing towards the complete definition of the revolutionary next fourth generation mobile, 4G. In this framework...
Conference Paper
Radio frequency identification (RFID) is a key technology for Europe. Since the initial emergence of the technology, there has been a noticeable shift away from RFID pilot projects of the early days, towards a broad deployment of RFID in order to increase the efficiency and innovation of processes. Even though Europe is a leading player in the worl...
Conference Paper
Full-text available
This paper seeks to explore the integration of spectrum and network resource management functionalities to the benefit of achieving higher performance and capacity gains in an International Mobile Telecommunications-Advanced (IMT-A) scenario. In particular, we investigate the allocation of users over two frequency bands (i.e., 2 GHz and 5 GHz) for...
Conference Paper
Full-text available
This study follows ISISEMD through a phenomenological approach of investigating the experience of the Human Computer Interaction (HCI) for someone with dementia. The aim is to accentuate the Assistive Technology (AT) from the end user perspective. This paper supports that older adults and those with dementia should no longer be an overlooked popula...
Article
Next generation communications will be composed of flexible, scalable and context-aware, secure and resilient architectures. The technologies will allow full mobility of the user and enable dynamic management policies that ensure end-to-end secure transmission of data and services across heterogeneous infrastructures and networks. The concept of ub...
Chapter
IntroductionIPCL LayerRadio Resource ControlCentralised, Distributed and Hybrid RRM ArchitectureSystem-Level Performance ResultsConclusion AcknowledgementsReferences
Article
This paper seeks to explore the integration of spectrum and network resource management functionalities to the benefit of achieving higher performance and capacity gains in an IMT-A scenario. In particular, we investigate the allocation of users over two frequency bands (i.e., 2 GHz and 5 GHz ones) for a single operator scenario. The same type of R...
Article
Full-text available
Phases I and II of the WINNER project contributed to the development, integration, and assessment of new mobile network techniques from 2004 to 2007. Some of these techniques are now in the 3GPP LTE and IEEE 802.16 (WiMAX) standards, while others are under consideration for LTE-Advanced and 802.16m. The WINNER+ project continues this forwardlooking...
Article
This paper defines the requirements for cooperation of heterogeneous radio access networks (RANs) and proposes a novel radio resource management (RRM) framework for support of mobility and quality of service (QoS) in a heterogeneous communication environment comprising IMT-Advanced and legacy systems. The reference IMT-Advanced system is the one de...
Conference Paper
Full-text available
This paper investigates and proposes a framework for the efficient integration of functionalities for dynamic spectrum use (e.g., spectrum aggregation) and cooperative radio resource management (RRM) in the scope of IMT-Advanced (IMT-A) candidate systems. The envisaged technical solution is based on a joint centralized and distributed approach for...
Conference Paper
Full-text available
Optimization of IEEE 802.11e MAC protocol performance is addressed by modifying several parameters left open in the standard, like block size and acknowledgement policies in order to improve the channel efficiency. The use of small block sizes leads to a high overhead caused by the negotiation on the other hand, the use of large block sizes causes...
Article
This paper proposes a novel call admission control (CAC) algorithm that considers various types of applications with various QoS parameters requested by a user and provides the required QoS to newly admitted users without a degradation of the QoS to already admitted ones. The proposed CAC is evaluated for a heterogeneous radio access technologies (...
Conference Paper
This paper introduces a framework of mobility management and call-handling based on policy enhancement towards the IMT-advanced systems. The function allocation and several selected mechanisms for the framework are described. The framework is based on the EU IST WINNER research project results and enables scalable service provisioning by setting th...
Article
The challenge to deliver the next generation of ubiquitous and converged network and service infrastructures for communication, computing and media, has forced research into innovative new directions. New infrastructures must overcome the scalability, flexibility, dependability and security bottlenecks of current ones in order to permit the emergen...
Conference Paper
Next generation communications will be composed of flexible, scalable and context-aware, secure and resilient architectures and technologies that allow full mobility of the user and enable dynamic management policies that ensure end-to-end secure transmission of data and services across heterogeneous infrastructures and networks. This paper investi...
Conference Paper
The concept of ubiquitous and scalable system is applied in the 1ST WINNER II [1] project to deliver optimum performance for different deployment scenarios, from local area to wide area wireless networks. The integration in a unique radio system of a cellular and local area type networks supposes a great advantage for the final user and for the ope...
Article
This paper describes an envisioned technology roadmap for the development of mobile and wireless communications until the year 2010. The roadmap description is based on a 3-years study (2001–2004) and monitoring of the technological developments of characteristically chosen mobile and wireless communication areas. The final definition of the techno...
Conference Paper
Personal networks (PNs) have been focused on in order to support the user's business and private activities without jeopardizing privacy and security of the users and their data. In such a network, it is necessary to produce a proper key agreement method according to the feature of the network. One of the features of the network is that the persona...
Technical Report
Full-text available
This report provides the baseline assumption related to environment, deployment, system design, and algorithms for the three test scenarios "base coverage urban", "microcellular", and "indoor" in which the WINNER system is exemplified and evaluated. Associated key assessment criteria are defined. The WINNER radio interface provides a versatile...
Conference Paper
The general requirements for a 4G system will mainly be derived from the types of service a user will require in the future. An information transport platform must provide high-speed, large volume, good quality, global coverage and flexibility to roam. To ensure this effective global coverage, we propose to derive the benefits of mobile ad-hoc netw...
Conference Paper
The reach and scope of commercial (and private) wireless system is expanding at fast pace. Third-generation mobile communication systems (IMT-2000 and Universal Mobile Telecommunication System, UMTS) will deliver voice, graphic, video, and other broadband information directly to the user, regardless of location, network, or terminal. Fourth generat...
Conference Paper
This paper presents an overview of the evolution of mobile communications towards third generation and beyond. Advanced multimedia services are discussed in view of the trend towards packet-oriented traffic in a wireless environment and in view of the dominant trends in mobile communications. We show how the trends and requirements are affecting th...
Conference Paper
This paper investigates a wireless IPv6-based network architecture to provide access to various multimedia applications with support of voice services, in terms of end-to-end quality of service (QoS) and mobility support in order to ensure global mobility in a converged wired/wireless, voice/data network. The objective is how to jointly use already...