Răzvan Crăciunescu

ORCID: 0000-0003-0060-3306
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About
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Research Areas
  • IoT and Edge/Fog Computing
  • Advanced MIMO Systems Optimization
  • Advanced Wireless Communication Techniques
  • Context-Aware Activity Recognition Systems
  • IoT-based Smart Home Systems
  • Wireless Communication Networks Research
  • Advanced Wireless Network Optimization
  • Cooperative Communication and Network Coding
  • IoT Networks and Protocols
  • Hand Gesture Recognition Systems
  • Energy Efficient Wireless Sensor Networks
  • Robotics and Automated Systems
  • Advanced Adaptive Filtering Techniques
  • Network Security and Intrusion Detection
  • Software-Defined Networks and 5G
  • PAPR reduction in OFDM
  • Telecommunications and Broadcasting Technologies
  • Power Line Communications and Noise
  • Cognitive Radio Networks and Spectrum Sensing
  • Smart Agriculture and AI
  • Software System Performance and Reliability
  • Web Application Security Vulnerabilities
  • RFID technology advancements
  • Wireless Body Area Networks
  • Advanced Wireless Communication Technologies

Universitatea Națională de Știință și Tehnologie Politehnica București
2015-2025

Information Technology University
2013-2023

Academy of Romanian Scientists
2023

Ministerul Cercetării și Inovării
2022

Aalborg University
2015

University of Bucharest
2013

This paper addresses the current technical challenge of an impedance mismatch between requirements smart connected object applications within sensing environment and characteristics today's cloud infrastructure. We investigate possibility to offload tasks, such as storage data signal processing edge network, thus decreasing latency associated with performing those tasks cloud. The research scenario is e-Health laboratory implementation where real-time performed by home PC, while extracted...

10.1109/acssc.2015.7421170 article EN 2014 48th Asilomar Conference on Signals, Systems and Computers 2015-11-01

Internet of Things (IoT) technology has facilitated the deployment autonomous sensors in remote and challenging environments, enabling substantial advancements environmental monitoring data collection. IoT continuously gather data, transmitting it to a central Base Station (BS) via designated Cluster Heads (CHs). However, flow encounters frequent congestion at CH nodes, negatively impacting network performance Quality Service (QoS). This paper introduces novel control strategy tailored for...

10.3390/math13040597 article EN cc-by Mathematics 2025-02-12

Ambient Assisted Living (AAL) is a key element in improving the senior's lifestyle and increasing their independence along with quality of life. AAL implementation through ICT trending research area, especially remote monitoring field. One biggest issues systems how they fit into healthcare system another country than origin. In article we present Romanian regulations procedures requirements, for Chronic Obstructive Pulmonary Disease Mild Dementia patients, also system, like eWALL, fits...

10.1109/telsks.2015.7357752 article EN 2015-10-01

Smart cities increasingly rely on the Internet of Things (IoT) to enhance infrastructure and public services. However, many existing IoT frameworks face challenges related security, privacy, scalability, efficiency, low latency. This paper introduces Blockchain Federated Learning for (BFLIoT) framework as a solution these issues. In proposed method, first collects real-time data, such traffic flow environmental conditions, then normalizes, encrypts, securely stores it blockchain ensure...

10.3390/smartcities7050109 article EN cc-by Smart Cities 2024-10-01

Without a doubt, we are living in interesting times, characterized by both continuous economic development and improved standard of living, but also uncertainty, increased pollution, environmental degradation, which means that, now, more than ever, global consistent action is needed order to create sustainable future. In this context, education general higher particular, face both, significant challenge substantial role due their formative function terms mindset practical tools. The main...

10.3390/su12051983 article EN Sustainability 2020-03-05

In this paper, a comparative study between the results of measurement campaign conducted in northern Greece and simulations performed with Radio Mobile ICS Telecom radio planning tools is performed. The DVB-T coverage transmitting station located near city Thessaloniki estimated using three empirical propagation models (NTIA-ITS Longley Rice, ITU-R P.1546 Okumura-Hata-Davidson) one deterministic model (ITU-R 525/526). best terms minimum average error standard deviation are obtained NTIA-ITS...

10.1109/bmsb.2015.7177260 article EN 2015-06-01

Today's IoT deployments are highly complex, heterogeneous and constantly changing. This poses severe security challenges such as limited end-to-end support, lack of cross-platform cross-vertical interoperability well the services that can be readily applied by practitioners third party developers. Overall, these require scalable, decentralized intelligent mechanisms which addressed SecureIoT project. paper presents definition, implementation validation a SecureIoT-enabled socially assisted...

10.3390/s21206912 article EN cc-by Sensors 2021-10-18

The traditional way of IT in a company can be very problematic. As changes the business environment occur, so appears need to implement more efficient enterprise systems. Cloud Computing technology represents next computing paradigm and solution most current problems. This article examines how has evolved it affects related performances by presenting case study based on SlapOS open source platform.

10.1109/telfor.2012.6419255 article EN 2022 30th Telecommunications Forum (TELFOR) 2012-11-01

Senior citizens may suffer from a number of diseases, including but not limited to mild dementia and cognitive disabilities, which require either the institutionalization or constant support care-givers. To successfully help senior citizens, usually monitoring system is needed that can gather process data various sensors about healthcare condition user environment parameters (noise level, light, humidity temperature). In this paper we describe cloud-based approach for fusion big...

10.1109/blackseacom.2015.7185095 article EN 2015-05-01

Precision agriculture is a type of innovative agriculture, based on new technologies, which aims to streamline the agricultural process. The aim this paper consists in reducing consumption resources and reaching maximum potential harvest, providing smart greenhouse automatically improves quality culture. Environmental parameters will be measured through several sensors depending data set, system decide control appropriate climate conditions for each crop. transmitted Message Queuing...

10.1109/comm48946.2020.9141981 article EN 2020-06-01

To enable emerging applications of fifth generation (5G) systems for vertical scenarios like mobile broadband and Internet things (IoT) vehicles maritime sectors, a new trend towards softwarization establishment private networks is gaining momentum. Different from earlier generations where network functions are traditionally operated based on dedicated hardware, 5G infrastructures can be virtualized services provided software, common hardware servers. In this paper, we present an open-source...

10.1109/wpmc55625.2022.10014829 article EN 2022 25th International Symposium on Wireless Personal Multimedia Communications (WPMC) 2022-10-30

Since SQL injection allows attackers to interact with the database of applications, it is regarded as a significant security problem. By applying machine learning algorithms, attacks can be identified. Problem: In training stage methods, effective features are used develop an optimal classifier that highly accurate. The specification highest efficacy considered NP-complete combinatorial optimization challenge. Selecting most refers procedure identifying smallest and in dataset. rationale...

10.3390/math12182917 article EN cc-by Mathematics 2024-09-19

The home automation system concept existed for many years but in the last decade, due to rapid development of sensors and wireless technologies, a large number various such "intelligent homes" have been developed. purpose present paper is demonstrate flexibility, reliability affordability projects, based on simple affordable implementation. A sensing control developed tested, having basic functionalities as switching on/off light according ambient lighting turning central heating. has built...

10.1117/12.2072262 article EN Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE 2015-02-21

This paper presents a number of aspects regarding TEMPEST-type evaluations made by STS. An Electromagnetic compatibility (EMC)/Electromagnetic interferences (EMI) test ensures information security assessing the efficiency TRANSEC measures implemented for an Informatics and Communications System (ICS). Several TEMPEST zoning, evaluation different electronic equipment data recovery, as well important conclusions reconstruction are highlighted.

10.1109/iccomm.2014.6866762 article EN 2014-05-01

The world population is growing in an accelerated way urging the need for a more efficient and sustainable agricultural industry. Initially developed smart cities which face same challenges caused by increasing population, Internet of Things (IoT) technologies have evolved rapidly over last few years are now moving successfully to agriculture. Wireless Sensor Networks (WSNs) been reported be used agri-food sector could answer call optimized management. This paper investigates PCB-made...

10.3390/s20195644 article EN cc-by Sensors 2020-10-02

Together with the increase in number of unmanned aerial vehicles (UAVs), necessity developing solutions for detection and defense against such devices appeared. Several approaches have been proposed this direction, using various technologies like acoustic sensors, optical radar. In paper a survey radio frequency (RF) based systems UAVs is performed. Moreover, novel RF solution on software defined (SDR) platforms proposed. The proposal includes both GROUND system, capable detecting...

10.1109/blackseacom52164.2021.9527871 article EN 2021-05-24

TEMPEST procedures are a series of protection measures that used to protect the IT infrastructure against electromagnetic eavesdropping. This paper presents main characteristics and applications number real world examples in which these applicable. Also, paper, provides an analytical method determine minimum level attenuation should be meet, by electromagnetically shielded room, order ensure in-room computer infrastructure. The had been tested validated measurements performed Special...

10.1109/iccomm.2016.7528278 article EN 2018 International Conference on Communications (COMM) 2016-06-01

This paper presents the performances BPSK / OFDM systems in terms of Bit Error Rate (BER) as a function Signal to Noise Ratio (SNR) using different types and lengths Guard Interval. The simulations were carried out over AWGN Rayleigh fading channels, results have been compared with theoretical ones. Based on those results, number conclusions highlighted last chapter paper.

10.1109/telfor.2012.6419249 article EN 2022 30th Telecommunications Forum (TELFOR) 2012-11-01

Nowadays, the complexity, heterogeneity and dynamic behaviour of emerging IoT deployments poses tremendous security challenges. The main limitations include limited end-to-end support, lack cross-platform cross-vertical interoperability inability to deal with very volatile smart object environments. Overall these require more dynamic, scalable, decentralized intelligent mechanisms which are addressed by SecureIoT project. This paper presents development a SecureIoT-enabled socially assisted...

10.1109/wpmc48795.2019.9096127 preprint EN 2019-11-01
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