
Josip LorinczFaculty of electrical engineering, mechanical engineering and naval architecture (FESB) -University of Split
Josip Lorincz
Ph. D.
About
73
Publications
62,224
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Introduction
Josip Lorincz is an associate professor in the Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture (FESB), University of Split, Croatia. His research interests are: Wireless networks, Energy-efficient networking and computing, Cognitive networks, Sensor networks, Smart city systems, Wired networks, Virtualisation, Routing protocols, Optimisation in telecommunications, Optical networks, Local/access/core communication networks, OSS/BSS solutions for telecom operators.
Additional affiliations
November 2019 - present
Faculty of electrical engineering, mechanical engineering and naval architecture (FESB), University of Split
Position
- Professor (Associate)
October 2011 - November 2019
Faculty of electrical engineering mechanical engineering and naval architecture (FESB), University of Split
Position
- Professor (Assistant)
Publications
Publications (73)
Cognitive radio (CR), as a concept based on the ability to detect and share the unutilised spectrum, has been envisioned as a promising candidate to improve the efficiency of frequency spectrum assignments. For the realisation of the CR concept, energy detection (ED), as one of the available spectrum sensing methods, is broadly considered because o...
It is expected that fifth-generation (5G) mobile networks will need to accommodate vast data traffic volumes. The practical implementation of 5G networks is further challenged by the presence of versatile demographic areas differing in user density and expected transmission rates. Accommodating the increased traffic demands in such versatile demogr...
As the rapid growth of mobile users and Internet-of-Everything devices will continue in the upcoming decade, more and more network capacity will be needed to accommodate such a constant increase in data volumes (DVs). To satisfy such a vast DV increase, the implementation of the fifth-generation (5G) and future sixth-generation (6G) mobile networks...
Due to the growing impact of the information and communications technology (ICT) sector on electricity usage and greenhouse gas emissions, telecommunication networks require new solutions which will enable the improvement of the energy efficiency of networks. Access networks, which are responsible for the last mile of connectivity and also for one...
The introduction of fifth-generation (5G) mobile networks leads to an increase in energy consumption and higher operational costs for mobile network operators (MNOs). Consequently, the optimization of 5G networks' energy efficiency is crucial, both in terms of reducing MNO costs and in terms of the negative environmental impact. However, many aspec...
The global deployment of fifth-generation (5G) mobile networks, especially in urban cities, is dedicated to accommodating the demand for high data rates and reliable wireless communications. While the latest 5G networks improve service quality, the support for a simultaneous serving of more user devices (UDs) with higher data rates than previous mo...
The COVID-19 pandemic made all organizations and enterprises work on cloud platforms from home, which greatly facilitates cyberattacks. Employees who work remotely and use cloud-based platforms are chosen as targets for cyberattacks. For that reason, cyber security is a more concerning issue and is now incorporated into almost every smart gadget an...
The book “Energy-efficient communication networks and systems” gives insights into the range of problems in the field of obtaining more energy-efficient communication networks and systems. The book contains the outcomes of the “Special Issue on energy-efficient communication networks and systems” organized for the Sensors journal published by the M...
The last decade has been characterized by a rapid increase in the usage of mobile communications. One of the main aspects of mobile communications is mobility. This means that mobile phones have to switch between base station cells in order to support the uninterrupted usage of all available services within the area of the mobile network coverage....
The continuous real-time monitoring of human health using biomedical sensing devices has recently become a promising approach to the realization of distant health monitoring. In this paper, the piezoelectric characteristics of the silk fibroin (SF) natural polymer were analyzed as the material used for obtaining sensing information in the applicati...
The Internet of Health Things (IoHT) has emerged as an attractive networking paradigm in wireless communications, integrated devices and embedded system technologies. In the IoHT, real-time health data are collected through smart healthcare sensors and, in recent years, the IoHT has started to have an important role in the Internet of Things techno...
To ensure effective spectrum usage, cognitive radio networks (CRNs) are being investigated extensively. The important function of CRNs is spectrum sensing (SS). This is the process of sensing the unused frequency spectrum and deciding whether the signal transmission of a primary user (PU) exists. In this work, the results of a performance analysis...
Due to the capability of the effective usage of the radio frequency spectrum, a concept known as cognitive radio has undergone a broad exploitation in real implementations. Spectrum sensing as a core function of the cognitive radio enables secondary users to monitor the frequency band of primary users and its exploitation in periods of availability...
The paper proposes a novel computing and networking framework that can be implemented for the realization of different disaster management applications or real-time surveillance. The framework is based on networks of unmanned aerial vehicles (UAVs) equipped with different sensors including cameras. The framework represents a holistic approach that...
Cognitive radio (CR) technology has the potential to detect and share the unutilized spectrum by enabling dynamic spectrum access. To detect the primary users’ (PUs) activity, energy detection (ED) is widely exploited due to its applicability when it comes to sensing a large range of PU signals, low computation complexity, and implementation costs....
Cognitive radio technology enables spectrum sensing (SS), which allows the secondary user (SU) to access vacant frequency bands in the periods when the primary user (PU) is not active. Due to its minute implementation complexity, the SS approach based on energy detection (ED) of the PU signal has been analyzed in this paper. Analyses were performed...
In today’s data networks, the main protocol used to ensure reliable communications is the transmission control protocol (TCP). The TCP performance is largely determined by the used congestion control (CC) algorithm. TCP CC algorithms have evolved over the past three decades and a large number of CC algorithm variations have been developed to accomm...
Evaluation of motor evoked potential (MEP) signals elicited by transcranial magnetic stimulation (TMS) over the motor cortex provide a measure of cortico-motor excitability at the time of stimulation. In the research and clinical medical practice, the MEP latency is a relevant neurophysiological parameter to determine conduction time for neural imp...
Due to the continuous expansion of telecom operators (TOs) services and subscriber's base, a number of objects in TO product catalogue (PC) traditionally developed employing some relational database (RD) rapidly increase. This can result in degraded PC database performance in terms of reduced object visibility or slow query response time, which man...
As the number of fixed and mobile users increases constantly, the data traffic volumes increase accordingly, presenting a challenge for fifth-generation (5G) mobile networks to accommodate those high demands. Also, different demography classes which represent various expected user densities with different expected data rates, impose practical deplo...
Remote sensing is commonly performed via airborne platforms such as satellites, specialized aircraft, and unmanned aerial systems (UASs), which perform airborne photography using mounted cameras. However, they are limited by their coverage (UASs), irregular flyover frequency (aircraft), and/or low spatial resolution (satellites) due to their high a...
The city of Split, being the main academic and industrial
center as well as an attractive resort at the Croatian Adriatic
coast, was a perfect venue for the 27th SoftCOM conference.
The International Conference on Software, Telecommunications
and Computer Networks - SoftCOM 2019 was held in
attractive ambience of the Radisson Blu Resort hotel, Spli...
The book “Green, Energy-Efficient and Sustainable Networks” represents a collection of 18 high-quality papers published as a Special Issue of Sensors. The published papers are self-contained peer-reviewed scientific works corresponding to the work of more than 80 authors from academia and industry. Among the published papers, there is one editorial...
Although information and communications technologies (ICTs) have the potential of enabling powerful social, economic and environmental benefits, ICT systems give a non-negligible contribution to world electricity consumption and carbon dioxide (CO2) footprint. This contribution will sustain since the increased demand for user′s connectivity and an...
Reducing data center (DC) power consumption is one of green Information and Communication Technology (ICT) challenges, which can be realised through improvement of DC energy-efficiency. To accomplish this improvement, each component of DC including those of power supply system such as uninterruptible power supplies (UPSs), has to operate at its max...
Although the contribution of information and communications technology's (ICTs) systems to global energy consumption and greenhouse gas (GHG) emissions cannot be completely eliminated, these contributions should be maximally reduced, in order to limit the exponential increase in energy consumption and GHG emission trends. To face this challenge, im...
Cognitive radio networks (CRN) based on spectrum sensing represent intelligent wireless communication technology dedicated to a more efficient exploitation of the available frequency spectrum. Although the energy detection (ED) method was found to be a promising candidate for spectrum sensing in the CRN, its detection performance is challenged by t...
Recent analyses show an increase in data center (DC) service downtime due to the increase in power supply outages caused by overloaded uninterruptable power supplies (UPSs). As a solution to the UPS overload problem, this paper presents developed a power distributor manager (PDM) that caps the power consumption of the DC by enforcing a power restri...
Communication and computing systems have increasing environmental footprint due to the significant amounts of greenhouse gas emission and energy consumption. To address such problems and create a sustainable environment, green communications and computing solutions should be designed with new methodologies, tools, algorithms, energy models, platfor...
Cognitive radio (CR) networks are an intelligent wireless communication technology that is aware of its surrounding environment. The main process of the cognitive radio is spectrum sensing. Energy detection (ED) method was found to be a promising candidate for spectrum sensing in the CR networks. However, the detection performance of the ED method...
The paper deals with implementation of the application layer in the business process management (BPM) system of the telecom operator. Using the concept of service-oriented architecture (SOA), it is possible to upgrade a process management system from the two-layer architecture to the three-layer architecture. In the three-layer architecture, presen...
Although technique known as server consolidation approach in a data center can reduce the overall power consumption, the Power Usage Effectiveness (PUE) of the data center will still be negatively affected with presence of distributed Uninterruptible Power Supplies (UPSs). The impact on the PUE arises from the fact that all UPS modules are kept run...
Energy consumption of information and communication networks has continued to grow faster than global electricity consumption, what makes optimization of network energy consumption a new target for competitive differentiation and innovation. For that reason, improving the energy efficiency of information and communication systems and networks becom...
Presents information on the 2016 IEEE OnlineGreenComm conference. From November 14-17, 2016, the IEEE Communications Society (ComSoc) hosted the annual IEEE Online Conference on Green Communications (IEEE Online- GreenComm’16). This sixth IEEE OnlieGreenComm conference served as forum for presenting and discussing novel research and technological d...
Communication technologies continue to be a central element of the transition to smart, energy-efficient and sustainable lifestyles. However, energy requirements of communication systems are a challenging problem that is already straining operating budgets and attracting the attention of policy makers around the world. For that reason, improving en...
This paper studies the base station (BS) spatial distributions across different scenarios in urban, rural, and coastal zones, based on real BS deployment data sets obtained from two European countries (i.e., Italy and Croatia). Basically, this paper takes into account different representative statistical distributions to characterize the probabilit...
We study the Short-Time Cell Outages (STCO) phenomena affecting Base Stations (BSs) in a mobile cellular operator network. The STCO is defined as a short-time outage of all or some BS cells (sectors) that lasts up to 30 min in a day, thus still guaranteeing more than 98% of operation. It is type of outage which cannot be detected directly through a...
Enhancing Energy efficiency is a worldwide objective towards reducing carbon emissions and strengthening the long term security of energy supply. Information and Communication Technologies (ICT) plays a major role in this endeavour and it is now widely accepted that energy efficiency is a key performance indicator in the next wave of innovations in...
We consider the effect of power state transitions on the lifetime of Base Stations (BSs) in a cellular network. In particular, we take into account the impact of putting in sleep mode the BS, and also the change of the radiated power. When the BS reduces its power consumption, its lifetime tends to increase, as a consequence of the temperature redu...
This article analyzes the impact that sleep mode (SM)-based green strategies have on the reliability performance of optical and cellular network elements. First, we consider a device in isolation (i.e., not plugged into a network in operation), showing how operational temperature and temperature variations, both introduced by SM, impact its lifetim...
We present the LIFETEL project, whose aim is trying to increase the device lifetime in telecommunication networks by exploiting energy-efficient techniques. In particular, we show that the lifetime of a device might increase when it is put in sleep mode. However, the device lifetime might decrease when power state variations (from sleep mode to ful...
Base station sites (BSSs) powered with renewable energy sources have gained the attention of cellular operators during the last few years. This is because such “green” BSSs impose significant reductions in the operational expenditures (OPEX) of telecom operators due to the possibility of on-site renewable energy harvesting. In this paper, the green...
This paper focuses on the impact that energy-efficient techniques have on the component lifetime in optical backbone networks. The study presented in the paper considers in particular the influence that green routing strategies have on the failure rate of Erbium Doped Fiber Amplifiers (EDFAs), i.e., if their lifetime is positively or negatively imp...
Continuous development and evolution of mobile communications toward end user expectations has led to heterogeneous mobile networks in the most general sense of the word. The mixture of core network infrastructures and radio access technologies, due to the arrival of new technologies while older ones are still used and not fully exploited, brings m...
To reduce the energy consumption and improve the environmental sustainability, novel paradigms, methods, techniques, and systems are needed to develop green netwroking and computing technologies, with focus on high-energy efficiency, lowering the dependence on energy sources that lead to greenhouse gas emissions, better re-use of resources and mate...
Sustainable networking is becoming a paradigm
for cellular operators. In this work, we study the interplay
between sleep modes and cellular network failure rates. In
particular, we have developed a new model to compute the Base
Station (BS) lifetime given the hardware (HW) and sleep mode
parameters. The BS model is then extended on the entire netwo...
Dynamic adaptation of the base stations on/off activity or transmit power, according to space and time traffic variations, are measures accepted in the most contemporary resource management approaches dedicated to improving energy efficiency of cellular access networks. Practical implementation of both measures results in changes to instantaneous b...
Significant part of the total energy consumption in distribution and core optical networks is contributed by the energy consumption of Internet Protocol (IP) routers. In this paper, an energy efficiency analysis has been performed for the case of real metro-optical network of a medium size city. Two real metro-optical network configurations, mores...
Due to the introduction of newer technologies like Long Term Evolution (LTE) in already deployed cellular access networks, changes in the energy-efficiency of networks consisting predominantly of macro base station sites (BSSs) can be expected. An investigation has been performed for two prominent energy metrics of cellular networks: Power per Unit...
Energy consumption is a major factor in the performance and deployment of modern Information and
communication technology (ICT) systems. In order to achieve as minimal energy consumption as possible while maintaining satisfactory level of service quality in existing and future communication networks, it is necessary to develop energy-efficient syst...
We study the impact of sleep modes capabilities on the lifetime of backbone devices. We first define a model that integrates sleep modes in the device lifetime. We then derive a model for the network topology to compute the average network lifetime. Finally, we consider a realistic case study driven by operator feedback. Results indicate that the a...
Optimization and reduction of energy consumption and the environmental impact of greenhouse gas emissions are among the most urgent challenges of the twenty-first century. Such challenges call for significant research to be carried out in order to develop new technologies that can enable a transition towards a more energy efficient society, leading...
Cellular networks represent one of the major energy consumers of communication networks and their contribution to the global carbon footprint and energy consumption continuously and rapidly increases. Improving energy efficiency of the cellular access networks become an important requirement and has recently gained considerable attention of the res...
It is widely accepted that the world is facing more and more sustainability and environmental challenges. In order to achieve the global objective of sustainability, the information and communication technology (ICT) industries needs to implement innovative schemes and mechanisms to reduce the overall energy-consumption. Towards this end, novel gre...
In the Republic of Croatia, over the last fifteen years, nautical tourism has been experiencing a strong expansion. Despite the general recession that prevails on the global market, nautical tourism in Croatia, according to the recent studies, has been recording high annual growth rates. In order to maintain competitive position on the market of th...
Base stations represent the main contributor to the energy consumption of a mobile cellular network. Since traffic load in mobile networks significantly varies during a working or weekend day, it is important to quantify the influence of these variations on the base station power consumption. Therefore, this paper investigates changes in the instan...
Over the last two decades we have witnessed significant growth of the cellular network energy consumption caused by a rapid increase in the number of mobile users and data volumes. This is contributed to by a tenfold increase of data rates every 5 years, and such a trend in up growth of energy consumption will continue with the introduction of a ne...
The third Special session on green networking and computing was held in the frame of the 20th International Conference on Software, Telecommunications and Computer Networks. The jubilee 20th International Conference on Software, Telecommunications and Computer Networks (SoftCOM 2012) was held in attractive ambience of the Radisson Blu Resort hotel,...
An overview of research activity in the area of powering base station sites by means of renewable energy sources is given. It is shown that mobile network operators express significant interest for powering remote base stations using renewable energy sources. This is because a significant percentage of remote base station sites on the global level...
Data rates in wireless networks grow approximately by a factor of 10 every 5 years and this together with the increase in the number of users, results in a doubling of the energy requirements of the wireless networks infrastructure every 4 to 5 years. This book considers minimizing the energy consumption of wireless access networks through switchin...
Due to technological development, cellular operators during last decade deploy macro base stations (BSs) of different cellular accesses technologies. Because of a long lifetime of macro BSs spanning over a decade, base stations of the second (2G), third (3G) and fourth (4G) generation can recently be found installed on the same macro base station s...
Energy consumption of wireless access networks is in permanent increase, what results with higher operational expenditures of network operators and negative impact on environment. In this paper we consider possible energy savings of wireless access networks through development of ILP model based on energy efficient network management. To cope with...
The energy consumption of wireless access networks is rapidly increasing and in some countries it amounts for more than 55% of the whole communication sector and for a non negligible part of the operational costs of mobile operators. The new wireless technologies with a growth of data rates by a factor of roughly 10 every 5 years and the increase i...
Energy consumption of wireless access networks is in permanent increase, what results with higher operational expenditures of network operators and negative impact on environment. In this paper we consider possible energy savings of wireless access networks through development of ILP model based on energy efficient network management. To cope with...
The energy consumption of wireless access networks is rapidly increasing and in some countries it amounts for more than 55% of the whole communication sector, also accounting to a non negligible part of the operational costs of mobile operators. Growth of data rates in wireless networks by a factor of roughly 10 every 5 years and increase in the nu...
The energy consumption of wireless access networks amounts for more than 55% of the whole communication sector and for a non negligible part of the operational costs of mobile operators. In this paper we consider possible energy savings through optimized management of on/off state and transmission power of access stations according to traffic estim...
This paper proposes a structure of adaptive beamforming system especially tailored for IEEE 802.11 n compliant WLAN operating in multiple input-multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) mode. The proposal defines beamforming system for 802.11 n transceiver exploiting space time block coding (STBC) of MIMO technology....
In recent years, there has been a growing demand for the development of authentication, authorization and accounting (AAA) systems for WLAN networks. In this paper we present a network architecture of SQL database servers especially tailored for AAA functions in large WLAN systems. Proposed database network architecture is vendor independent in sen...
In this paper, we present throughput analysis of two popular Mobile Ad hoc NETwork (MANET) routing protocol implementations, AODV-UU (Uppsala University) and DSR-UU. Both implementations are Linux based user space implementations developed using C language. Instead of using simulator for throughput analysis, the investigated scenario involves a sta...
In January 2004 IEEE announced that it had formed a new 802.11 Task Group N (TGn) to develop a new amendment to the 802.11 standard for wireless local-area networks that is known as the IEEE 802.11n standard. The real data throughput is at least 100 Mbps, with the possibility of even higher raw data rate at the physical layer (PHY), and should be u...
Nodes in Mobile Ad-hoc Networks (MANET) act not only as source or destination but also as intermediate nodes (routers). This makes multi-hop wireless communication possible. In this paper we evaluate FTP throughput in MANET testbed running AODV routing protocol implementation from Uppsala University (AODV-UU). Visualization and configuration of tes...
Integration of wireless and optical networks is a potential solution for increasing capacity and mobility as well as decreasing costs. By using Hybrid Fiber Radio (HFR) network, a method in integrating wireless and optical networks, the capacity of optical networks can be combined with the flexibility and mobility of WLANs. This paper presents a no...
Reliable model of the attainable throughput in IEEE 802.11b WLAN is needed to facilitate capacity planning and network deployment. In this paper an approximate analytical formula for calculating effective throughput of 802.11b devices, as a function of the number of competing stations for different sizes of transmitted packets has been proposed. Us...