Vasileios Kokkinos
Short CV: Dr. Vasileios Kokkinos was born in Ioannina, Greece in 1981. He obtained his diploma from the Physics Department of the University of Patras in October 2003. Next, he was accepted in the postgraduate program “Electronics and Information Processing” in the same department and in March 2006 he obtained his Master Degree. In 2010 he received his PhD on Power Control in Mobile Telecommunication Networks from the Computer Engineering and Informatics Department. Dr. Kokkinos has worked as a member of Collaborating Teaching Staff in the context of the Open and Distance Teaching provided by the Hellenic Open University, in the framework of the Thematic Unit “PLI23 – Telematics, Internet and Society”, of the Under/Postgraduate Program “PLI – Informatics”, of the School of Sciences and Technology (academic years 2020-21 and 2021-22). He was also an appointed teaching staff of the courses “Broadband Technologies” and “Public Use Networks and Network Interconnection” of the study program of Computer Engineering & Informatics Department of the University of Patras during academic years 2020-21, 2021-22, 2022-23 and 2023-24. He currently works as Computer and Informatics Engineer and Manager at the Distributed Systems and Telematics Lab of the Computer Engineering and Informatics Department. His research interests include data networks, 3rd/4th/5th generation mobile telecommunications networks, multicast routing and group management, radio resource management, internet of things and machine learning. He has participated in several R&D projects, and he has published several research papers in various well-known refereed conferences and articles in scientific journals.
Journal Articles
Bouras, Christos; Antonis, Konstantinos; Diles, Georgios; Kokkinos, Vasileios; Loukopoulos, Leonidas
Economic Broadband Development through Infrastructure Sharing Journal Article
In: International Journal of Business Data Communications and Networking, IGI Global, vol. 10, pp. 21-42, 2014.
Abstract | Links | BibTeX | Tags:
@article{4106,
title = {Economic Broadband Development through Infrastructure Sharing},
author = {Christos Bouras and Konstantinos Antonis and Georgios Diles and Vasileios Kokkinos and Leonidas Loukopoulos},
url = {https://telematics.upatras.gr/economic-broadband-development-through-infrastructure-sharing/},
year = {2014},
date = {2014-01-01},
urldate = {2014-01-01},
journal = {International Journal of Business Data Communications and Networking, IGI Global},
volume = {10},
pages = {21-42},
abstract = {Broadband is a public utility with positive effects on competitiveness, employment and growth. Although evidence shows that broadband development is increasing, this increment is not homogeneous between urban and rural areas. The main factor is the high cost for deploying next generation networks in rural areas, and especially the cost linked to civil engineering works. In order to overcome the investment challenges arising in the context of broadband deployment, the European Commission made mandatory the sharing of existing telecommunication and non-telecommunication infrastructures and facilities. This manuscript proposes and presents a novel tool that enables the estimation of the expected savings from exploiting existing infrastructures when deploying a broadband network. This is followed by a number of general principles and recommendations that policy makers and national authorities could embrace to diminish deployment costs and promote broadband deployment.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Broadband is a public utility with positive effects on competitiveness, employment and growth. Although evidence shows that broadband development is increasing, this increment is not homogeneous between urban and rural areas. The main factor is the high cost for deploying next generation networks in rural areas, and especially the cost linked to civil engineering works. In order to overcome the investment challenges arising in the context of broadband deployment, the European Commission made mandatory the sharing of existing telecommunication and non-telecommunication infrastructures and facilities. This manuscript proposes and presents a novel tool that enables the estimation of the expected savings from exploiting existing infrastructures when deploying a broadband network. This is followed by a number of general principles and recommendations that policy makers and national authorities could embrace to diminish deployment costs and promote broadband deployment.
Bilios, Dimitrios; Bouras, Christos; Diles, Georgios; Kokkinos, Vasileios; Papazois, Andreas; Tseliou, Georgia
A Simulation Framework for the Evaluation of Frequency Reuse in LTE - A Systems Journal Article
In: International Journal of Wireless Networks and Broadband Technologies, IGI Global, vol. 3, pp. 56-83, 2014.
Abstract | Links | BibTeX | Tags:
@article{3439,
title = {A Simulation Framework for the Evaluation of Frequency Reuse in LTE - A Systems},
author = {Dimitrios Bilios and Christos Bouras and Georgios Diles and Vasileios Kokkinos and Andreas Papazois and Georgia Tseliou},
url = {https://telematics.upatras.gr/a-simulation-framework-for-the-evaluation-of-frequency-reuse-in-lte-a-systems/},
year = {2014},
date = {2014-01-01},
urldate = {2014-01-01},
journal = {International Journal of Wireless Networks and Broadband Technologies, IGI Global},
volume = {3},
pages = {56-83},
abstract = {Long Term Evolution Advanced (LTE-A) technology is considered as the most possible candidate for next generation mobile communications. LTE-A networks offer high capacity and are specified and designed to accommodate small, high performance, power-efficient end-user devices. Similarly to its predecessor LTE, LTE-A incorporates inter-cell interference mitigation methods in order to mitigate interference and to enhance efficiency in bandwidth usage. These methods include power and frequency allocation schemes that allow neighbouring cells and femtocells in heterogeneous networks to co-ordinately share and reuse available spectral resources, in order to avoid performance degradation for interference suffering cell-edge users. In this paper, we study the LTE-A multi-cell systems? performance using a simulation framework, which integrates several frequency reuse techniques and provides a user-friendly graphical presentation of the evaluation results. The optimal Fractional Frequency Reuse (FFR) configuration for the user-defined network instance is also determined, based on overall performance and fairness index metrics. Finally, we examine FFR techniques in two-tier femtocell/macrocell environments and evaluate them based on the optimization of different metrics, depending on the network operator?s needs.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Long Term Evolution Advanced (LTE-A) technology is considered as the most possible candidate for next generation mobile communications. LTE-A networks offer high capacity and are specified and designed to accommodate small, high performance, power-efficient end-user devices. Similarly to its predecessor LTE, LTE-A incorporates inter-cell interference mitigation methods in order to mitigate interference and to enhance efficiency in bandwidth usage. These methods include power and frequency allocation schemes that allow neighbouring cells and femtocells in heterogeneous networks to co-ordinately share and reuse available spectral resources, in order to avoid performance degradation for interference suffering cell-edge users. In this paper, we study the LTE-A multi-cell systems? performance using a simulation framework, which integrates several frequency reuse techniques and provides a user-friendly graphical presentation of the evaluation results. The optimal Fractional Frequency Reuse (FFR) configuration for the user-defined network instance is also determined, based on overall performance and fairness index metrics. Finally, we examine FFR techniques in two-tier femtocell/macrocell environments and evaluate them based on the optimization of different metrics, depending on the network operator?s needs.
Bouras, Christos; Filopoulos, Anestis; Kokkinos, Vasileios; Michalopoulos, Sotiris; Papadopoulos, Dimitris; Tseliou, Georgia
Policy recommendations for public administrators on free and open source software usage Journal Article
In: Telematics and Informatics, Elsevier Science, vol. 31, 2014.
Abstract | Links | BibTeX | Tags:
@article{3443,
title = {Policy recommendations for public administrators on free and open source software usage},
author = {Christos Bouras and Anestis Filopoulos and Vasileios Kokkinos and Sotiris Michalopoulos and Dimitris Papadopoulos and Georgia Tseliou},
url = {https://telematics.upatras.gr/30291-s2-0-s0736585313000361-main/},
year = {2014},
date = {2014-01-01},
urldate = {2014-01-01},
journal = {Telematics and Informatics, Elsevier Science},
volume = {31},
abstract = {Free and open source software, holding a strategic position in knowledge economy, reaffirms the critical role of governments and regional authorities in establishing strategies for integrating effective and sustainable Information Technology solutions in the public sector towards economic growth and social welfare. Moreover, public services, organizations and territorial administrations collectively represent a major software user with great impact on the software market. In this sense, software selection in the public sector is a highly political and strategic process; various collateral implications and policy aspects should be considered in order to reach the best possible decisions. Within this context, this manuscript provides policy recommendations on issues and challenges pertaining to the use of free and open source software by European public administrations. The recommended policy actions are mainly based on review of the current policy framework. The main goal of this manuscript is to contribute in providing policy orientations and proposing actions that can help governments, public administrations and European institutions fully harvest the benefits of open source.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Free and open source software, holding a strategic position in knowledge economy, reaffirms the critical role of governments and regional authorities in establishing strategies for integrating effective and sustainable Information Technology solutions in the public sector towards economic growth and social welfare. Moreover, public services, organizations and territorial administrations collectively represent a major software user with great impact on the software market. In this sense, software selection in the public sector is a highly political and strategic process; various collateral implications and policy aspects should be considered in order to reach the best possible decisions. Within this context, this manuscript provides policy recommendations on issues and challenges pertaining to the use of free and open source software by European public administrations. The recommended policy actions are mainly based on review of the current policy framework. The main goal of this manuscript is to contribute in providing policy orientations and proposing actions that can help governments, public administrations and European institutions fully harvest the benefits of open source.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Kanakis, Nikos
Application Layer Forward Error Correction for Multicast Streaming over LTE Networks Journal Article
In: International Journal of Communication Systems, Wiley InterScience, pp. 1459-1574, vol. 26, pp. 1459-1574, 2013.
Abstract | Links | BibTeX | Tags: FEC, LTE, MBMS
@article{3113,
title = {Application Layer Forward Error Correction for Multicast Streaming over LTE Networks},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Nikos Kanakis},
url = {https://telematics.upatras.gr/3846dac2321/},
year = {2013},
date = {2013-01-01},
urldate = {2013-01-01},
journal = {International Journal of Communication Systems, Wiley InterScience, pp. 1459-1574},
volume = {26},
pages = {1459-1574},
abstract = {The next step beyond third generation (3G) mobile networks is the Third Generation Partnership Project (3GPP) standard, named Long Term Evolution (LTE). A key feature of LTE is the enhancement of Multimedia Broadcast/Multicast Services (MBMS), where the same content is transmitted to multiple users located in a specific service area. To support efficient download and streaming delivery, 3GPP included an application layer Forward Error Correction (AL-FEC) technique based on the systematic fountain Raptor code, in the MBMS standard. In order to achieve protection against packet losses, Raptor codes introduce redundant packets to the transmission, i.e., the FEC overhead. In this work, we investigate the application of AL-FEC over MBMS streaming services. We consider the benefits of AL-FEC for a continuous multimedia stream transmission to multiple users and we examine how the amount of FEC redundancy can be adjusted under different packet loss conditions. For this purpose, we present a variety of realistic simulation scenarios for the application of AL-FEC and furthermore we provide an in-depth analysis of Raptor codes performance introducing valuable suggestions to achieve efficient use of Raptor codes.},
keywords = {FEC, LTE, MBMS},
pubstate = {published},
tppubtype = {article}
}
The next step beyond third generation (3G) mobile networks is the Third Generation Partnership Project (3GPP) standard, named Long Term Evolution (LTE). A key feature of LTE is the enhancement of Multimedia Broadcast/Multicast Services (MBMS), where the same content is transmitted to multiple users located in a specific service area. To support efficient download and streaming delivery, 3GPP included an application layer Forward Error Correction (AL-FEC) technique based on the systematic fountain Raptor code, in the MBMS standard. In order to achieve protection against packet losses, Raptor codes introduce redundant packets to the transmission, i.e., the FEC overhead. In this work, we investigate the application of AL-FEC over MBMS streaming services. We consider the benefits of AL-FEC for a continuous multimedia stream transmission to multiple users and we examine how the amount of FEC redundancy can be adjusted under different packet loss conditions. For this purpose, we present a variety of realistic simulation scenarios for the application of AL-FEC and furthermore we provide an in-depth analysis of Raptor codes performance introducing valuable suggestions to achieve efficient use of Raptor codes.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Kanakis, Nikos
Embracing RaptorQ FEC in 3GPP multicast services Journal Article
In: Wireless Networks, Springer Verlang, pp. 1023-1035, vol. 19, pp. 1023-1035, 2013.
Abstract | Links | BibTeX | Tags: FEC, MBMS
@article{3119,
title = {Embracing RaptorQ FEC in 3GPP multicast services},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Nikos Kanakis},
url = {https://telematics.upatras.gr/331510-1007_s11276-012-0515-3/},
year = {2013},
date = {2013-01-01},
urldate = {2013-01-01},
journal = {Wireless Networks, Springer Verlang, pp. 1023-1035},
volume = {19},
pages = {1023-1035},
abstract = {Multimedia Broadcast/Multicast Services (MBMS) have been introduced by Third Generation Partnership Project (3GPP) aiming to efficiently deliver data to mobile users in a one-to-many way. In order to provide reliable multicast transmission, 3GPP recommends exclusively for MBMS the use of a Forward Error Correction (FEC) mechanism on the application layer. Raptor codes are standardized as the Application Layer FEC (AL-FEC) scheme over 3GPP MBMS. However, the 3GPP standardized systematic fountain Raptor code is nowadays considered obsolete, since a new variation of the Raptor codes has emerged. This enhanced AL-FEC scheme, named RaptorQ, promises higher protection efficiency and superior flexibility on the provision of demanding mobile multicast services. In this work, we provide an extensive performance evaluation presenting at first a theoretical performance comparison of the newly introduced RaptorQ FEC scheme with its predecessor Raptor code, examining the enhancements that RaptorQ introduces on the AL-FEC protection robustness. Thereafter, to verify the enhanced performance of RaptorQ, we present several simulation results considering the modeling of the AL-FEC protection over multicast services for next generation mobile networks, utilizing the ns-3 simulation environment. Investigating several mobile system parameters in conjunction with FEC encoding parameters, we provide valuable results regarding the impacts of the examined AL-FEC schemes application on the multicast services performance.},
keywords = {FEC, MBMS},
pubstate = {published},
tppubtype = {article}
}
Multimedia Broadcast/Multicast Services (MBMS) have been introduced by Third Generation Partnership Project (3GPP) aiming to efficiently deliver data to mobile users in a one-to-many way. In order to provide reliable multicast transmission, 3GPP recommends exclusively for MBMS the use of a Forward Error Correction (FEC) mechanism on the application layer. Raptor codes are standardized as the Application Layer FEC (AL-FEC) scheme over 3GPP MBMS. However, the 3GPP standardized systematic fountain Raptor code is nowadays considered obsolete, since a new variation of the Raptor codes has emerged. This enhanced AL-FEC scheme, named RaptorQ, promises higher protection efficiency and superior flexibility on the provision of demanding mobile multicast services. In this work, we provide an extensive performance evaluation presenting at first a theoretical performance comparison of the newly introduced RaptorQ FEC scheme with its predecessor Raptor code, examining the enhancements that RaptorQ introduces on the AL-FEC protection robustness. Thereafter, to verify the enhanced performance of RaptorQ, we present several simulation results considering the modeling of the AL-FEC protection over multicast services for next generation mobile networks, utilizing the ns-3 simulation environment. Investigating several mobile system parameters in conjunction with FEC encoding parameters, we provide valuable results regarding the impacts of the examined AL-FEC schemes application on the multicast services performance.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Tseliou, Georgia; Bilios, Dimitrios
Selecting the Optimal Fractional Frequency Reuse Scheme in Long Term Evolution Networks Journal Article
In: Wireless Personal Communications, Springer Verlang, pp. 2693-2712, vol. 71, pp. 2693-2712, 2013.
Abstract | Links | BibTeX | Tags: FFR
@article{3121,
title = {Selecting the Optimal Fractional Frequency Reuse Scheme in Long Term Evolution Networks},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Georgia Tseliou and Dimitrios Bilios},
url = {https://telematics.upatras.gr/2659wpc10-1007_s11277-012-0965-z/},
year = {2013},
date = {2013-01-01},
urldate = {2013-01-01},
journal = {Wireless Personal Communications, Springer Verlang, pp. 2693-2712},
volume = {71},
pages = {2693-2712},
abstract = {Long Term Evolution (LTE) networks offer high capacity and are specified and designed to accommodate small, high performance, power-efficient end-user devices. One limiting factor that influences LTE performance is the interference from neighbouring cells, the so called Inter-Cell Interference (ICI). The investigation of ICI mitigation techniques has become a key focus area in achieving dense spectrum reuse in next generation cellular systems. Fractional Frequency Reuse (FFR) has been proposed as a technique to overcome this problem, since it can efficiently utilize the available frequency spectrum. This manuscript proposes a dynamic mechanism that selects the optimal FFR scheme based on a custom metric, which is called user satisfaction. In detail, the proposed mechanism divides the cell into two regions, the inner and outer region, and selects the optimal size as well as the optimal frequency allocation between these regions with main target to maximize the user satisfaction metric. The proposed mechanism is evaluated through several simulation scenarios that incorporate users? mobility and its selected FFR scheme is compared with other frequency reuse schemes in order to highlight its performance.},
keywords = {FFR},
pubstate = {published},
tppubtype = {article}
}
Long Term Evolution (LTE) networks offer high capacity and are specified and designed to accommodate small, high performance, power-efficient end-user devices. One limiting factor that influences LTE performance is the interference from neighbouring cells, the so called Inter-Cell Interference (ICI). The investigation of ICI mitigation techniques has become a key focus area in achieving dense spectrum reuse in next generation cellular systems. Fractional Frequency Reuse (FFR) has been proposed as a technique to overcome this problem, since it can efficiently utilize the available frequency spectrum. This manuscript proposes a dynamic mechanism that selects the optimal FFR scheme based on a custom metric, which is called user satisfaction. In detail, the proposed mechanism divides the cell into two regions, the inner and outer region, and selects the optimal size as well as the optimal frequency allocation between these regions with main target to maximize the user satisfaction metric. The proposed mechanism is evaluated through several simulation scenarios that incorporate users? mobility and its selected FFR scheme is compared with other frequency reuse schemes in order to highlight its performance.
Bouras, Christos; Alexiou, Antonios; Papazois, Andreas; Kokkinos, Vasileios; Tsichritzis, George
Modulation and coding scheme selection in multimedia broadcast over a single frequency network-enabled long-term evolution networks Journal Article
In: International Journal of Communication Systems, Wiley InterScience, pp. 1603-1619, vol. 25, pp. 1603-1619, 2013.
Abstract | Links | BibTeX | Tags: LTE, MBSFN, MCS
@article{3105,
title = {Modulation and coding scheme selection in multimedia broadcast over a single frequency network-enabled long-term evolution networks},
author = {Christos Bouras and Antonios Alexiou and Andreas Papazois and Vasileios Kokkinos and George Tsichritzis},
url = {https://telematics.upatras.gr/1745ijcs2012dac1326/},
year = {2013},
date = {2013-01-01},
urldate = {2013-01-01},
journal = {International Journal of Communication Systems, Wiley InterScience, pp. 1603-1619},
volume = {25},
pages = {1603-1619},
abstract = {Long term evolution constitutes the next generation cellular network beyond 3G that is designed to support the explosion in demand for bandwidth-hungry multimedia services in wireless networks by providing an extremely high performance radio access technology. To support multimedia broadcast/multicast services (MBMS), long term evolution offers the functionality to transmit MBMS over a single frequency network, where a time-synchronized common waveform is transmitted from multiple cells for a given duration. This enables over-the-air combining, thus significantly improving the spectral efficiency (SE) compared with conventional MBMS operations. In MBMS over a single frequency network transmissions, the achieved SE is mainly determined by the modulation and coding scheme selected. This study proposes and evaluates four approaches for the selection of the modulation and coding scheme. Each approach corresponds to different users? distribution and multimedia traffic conditions. On the basis of SE measurements, we determine the approach that either maximizes or achieves a target SE for the corresponding users distribution and traffic conditions. Copyright © 2011 John Wiley & Sons, Ltd.},
keywords = {LTE, MBSFN, MCS},
pubstate = {published},
tppubtype = {article}
}
Long term evolution constitutes the next generation cellular network beyond 3G that is designed to support the explosion in demand for bandwidth-hungry multimedia services in wireless networks by providing an extremely high performance radio access technology. To support multimedia broadcast/multicast services (MBMS), long term evolution offers the functionality to transmit MBMS over a single frequency network, where a time-synchronized common waveform is transmitted from multiple cells for a given duration. This enables over-the-air combining, thus significantly improving the spectral efficiency (SE) compared with conventional MBMS operations. In MBMS over a single frequency network transmissions, the achieved SE is mainly determined by the modulation and coding scheme selected. This study proposes and evaluates four approaches for the selection of the modulation and coding scheme. Each approach corresponds to different users? distribution and multimedia traffic conditions. On the basis of SE measurements, we determine the approach that either maximizes or achieves a target SE for the corresponding users distribution and traffic conditions. Copyright © 2011 John Wiley & Sons, Ltd.
Bouras, Christos; Kokkinos, Vasileios; Tseliou, Georgia
Methodology for Public Administrators for Selecting between Open Source and Proprietary Software Journal Article
In: Journal of Telematics and Informatics, Elsevier Science, pp. 100-110, pp. 100 - 110, 2013.
Abstract | Links | BibTeX | Tags:
@article{3115,
title = {Methodology for Public Administrators for Selecting between Open Source and Proprietary Software},
author = {Christos Bouras and Vasileios Kokkinos and Georgia Tseliou},
url = {https://telematics.upatras.gr/75521-s2-0-s073658531200024x-main/},
year = {2013},
date = {2013-01-01},
urldate = {2013-01-01},
journal = {Journal of Telematics and Informatics, Elsevier Science, pp. 100-110},
pages = {100 - 110},
abstract = {The public sector needs to change over to communicating digitally. This development makes great demands both on work processes in the public sector and on the Information Technology systems, on which e-government is based. From the economic perspective, the change-over poses great challenges, as huge investments will have to be made in Information Technology in the public sector. It is therefore natural, in connection with these investments, for a detailed assessment to be made of what forms of technology it is anticipated to be used, and who controls the development and ownership of this technology. The question is: to what extent Free and Open Source Software can supplement or completely replace proprietary software? This work constitutes a review of literature on pre-existing comparative studies regarding the technical, social, economic and organizational factors on Free and Open Source Software usage. Furthermore, this work includes guidelines that Public Administrations should follow for the selection between open source and proprietary software. Our goal is to help public stakeholders understand the technical/social/economic/organizational environment and therefore reach informed decisions when selecting the appropriate software. The manuscript can also be useful for Free and Open Source Software developers, users and communities who are either directly or indirectly involved in the software market.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The public sector needs to change over to communicating digitally. This development makes great demands both on work processes in the public sector and on the Information Technology systems, on which e-government is based. From the economic perspective, the change-over poses great challenges, as huge investments will have to be made in Information Technology in the public sector. It is therefore natural, in connection with these investments, for a detailed assessment to be made of what forms of technology it is anticipated to be used, and who controls the development and ownership of this technology. The question is: to what extent Free and Open Source Software can supplement or completely replace proprietary software? This work constitutes a review of literature on pre-existing comparative studies regarding the technical, social, economic and organizational factors on Free and Open Source Software usage. Furthermore, this work includes guidelines that Public Administrations should follow for the selection between open source and proprietary software. Our goal is to help public stakeholders understand the technical/social/economic/organizational environment and therefore reach informed decisions when selecting the appropriate software. The manuscript can also be useful for Free and Open Source Software developers, users and communities who are either directly or indirectly involved in the software market.
Bouras, Christos; Alexiou, Antonios; Kokkinos, Vasileios; Tsichritzis, George
Performance Evaluation of LTE for MBSFN Transmissions Journal Article
In: Wireless Networks, Springer Verlang, pp. 227-240, vol. 18, pp. 227-240, 2012.
Abstract | Links | BibTeX | Tags: LTE, MBSFN
@article{3104,
title = {Performance Evaluation of LTE for MBSFN Transmissions},
author = {Christos Bouras and Antonios Alexiou and Vasileios Kokkinos and George Tsichritzis},
url = {https://telematics.upatras.gr/2568winet1/},
year = {2012},
date = {2012-01-01},
urldate = {2012-01-01},
journal = {Wireless Networks, Springer Verlang, pp. 227-240},
volume = {18},
pages = {227-240},
abstract = {Long Term Evolution (LTE) is the most promised latest step towards the 4th generation (4G) of radio technologies designed to increase the capacity and speed of mobile communications with main target the support of the so-called “Mobile Broadband”. To support Multimedia Broadcast/Multicast Services (MBMS), LTE offers the possibility to transmit Multimedia Broadcast multicast service over a Single Frequency Network (MBSFN), where a time-synchronized common waveform is transmitted from multiple cells for a given duration. In this manuscript we analytically present the MBSFN delivery method and evaluate its performance. The critical parameters of primary interest for the evaluation of the scheme are the packet delivery cost and its scalability. To this direction, a telecommunication cost analysis of the MBMS service is presented based on the transmission cost over the air interface, as well as the costs of all interfaces and nodes of the MBSFN architecture. Based on this cost analysis we determine the ideal number of cells that should participate in the MBSFN transmission in order to improve the overall MBSFN performance. Since the performance of the MBSFN scheme mainly depends on the configuration of the LTE network that is under investigation, we consider different network topologies, MBSFN deployments and user distributions.},
keywords = {LTE, MBSFN},
pubstate = {published},
tppubtype = {article}
}
Long Term Evolution (LTE) is the most promised latest step towards the 4th generation (4G) of radio technologies designed to increase the capacity and speed of mobile communications with main target the support of the so-called “Mobile Broadband”. To support Multimedia Broadcast/Multicast Services (MBMS), LTE offers the possibility to transmit Multimedia Broadcast multicast service over a Single Frequency Network (MBSFN), where a time-synchronized common waveform is transmitted from multiple cells for a given duration. In this manuscript we analytically present the MBSFN delivery method and evaluate its performance. The critical parameters of primary interest for the evaluation of the scheme are the packet delivery cost and its scalability. To this direction, a telecommunication cost analysis of the MBMS service is presented based on the transmission cost over the air interface, as well as the costs of all interfaces and nodes of the MBSFN architecture. Based on this cost analysis we determine the ideal number of cells that should participate in the MBSFN transmission in order to improve the overall MBSFN performance. Since the performance of the MBSFN scheme mainly depends on the configuration of the LTE network that is under investigation, we consider different network topologies, MBSFN deployments and user distributions.
Bouras, Christos; Alexiou, Antonios; Papazois, Andreas; Kokkinos, Vasileios; Asimakis, Konstantinos; Tseliou, Georgia
Cost Optimization of MBSFN and PTM Transmissions for Reliable Multicasting in LTE Networks Journal Article
In: Wireless Networks, Springer Verlang, pp. 277-293, pp. 277-293, 2012.
Abstract | Links | BibTeX | Tags: Cost analysis, LTE, MBSFN
@article{3109,
title = {Cost Optimization of MBSFN and PTM Transmissions for Reliable Multicasting in LTE Networks},
author = {Christos Bouras and Antonios Alexiou and Andreas Papazois and Vasileios Kokkinos and Konstantinos Asimakis and Georgia Tseliou},
url = {https://telematics.upatras.gr/5966winet2/},
year = {2012},
date = {2012-01-01},
urldate = {2012-01-01},
journal = {Wireless Networks, Springer Verlang, pp. 277-293},
pages = {277-293},
abstract = {Long Term Evolution (LTE) systems have been specified and designed to accommodate small, high performance, power-efficient, end-user devices. The evolved Multimedia Broadcast/Multicast Service (e-MBMS) feature is introduced by the 3rd Generation Partnership Project (3GPP) as a complement to the existing MBMS service in order to accommodate multicast groups that are interested in receiving the same data. MBMS service is provided by MBMS over a Single Frequency Network (MBSFN) and/or Point-To-Multipoint (PTM) transmission methods. One of the challenges of MBMS is the complete error recovery of the transmitted files, a matter of great importance since the distribution of binary data must result in 100% error-free download. To fulfill this tight requirement, Forward Error Correction (FEC) mechanism has been proposed by 3GPP. In this work, we investigate the reliable multicasting by introducing a transmission method that combines the advantages of MBSFN and PTM transmission methods. We compare several FEC-based file recovery methods and evaluate them against various network parameters in a realistic simulation environment. The comparison is based on a cost-oriented analysis of MBMS service that takes into account the transmission cost over all the interfaces and nodes of the LTE architecture. The simulation results are performed with the aid of a new simulation tool and show that the performance of the file repair schemes depend on the network configuration.
KEYWORDS: multimedia multicasting; cellular networks; forward error correction; reliability; single frequency network; optimization; point to multipoint;},
keywords = {Cost analysis, LTE, MBSFN},
pubstate = {published},
tppubtype = {article}
}
Long Term Evolution (LTE) systems have been specified and designed to accommodate small, high performance, power-efficient, end-user devices. The evolved Multimedia Broadcast/Multicast Service (e-MBMS) feature is introduced by the 3rd Generation Partnership Project (3GPP) as a complement to the existing MBMS service in order to accommodate multicast groups that are interested in receiving the same data. MBMS service is provided by MBMS over a Single Frequency Network (MBSFN) and/or Point-To-Multipoint (PTM) transmission methods. One of the challenges of MBMS is the complete error recovery of the transmitted files, a matter of great importance since the distribution of binary data must result in 100% error-free download. To fulfill this tight requirement, Forward Error Correction (FEC) mechanism has been proposed by 3GPP. In this work, we investigate the reliable multicasting by introducing a transmission method that combines the advantages of MBSFN and PTM transmission methods. We compare several FEC-based file recovery methods and evaluate them against various network parameters in a realistic simulation environment. The comparison is based on a cost-oriented analysis of MBMS service that takes into account the transmission cost over all the interfaces and nodes of the LTE architecture. The simulation results are performed with the aid of a new simulation tool and show that the performance of the file repair schemes depend on the network configuration.
KEYWORDS: multimedia multicasting; cellular networks; forward error correction; reliability; single frequency network; optimization; point to multipoint;
KEYWORDS: multimedia multicasting; cellular networks; forward error correction; reliability; single frequency network; optimization; point to multipoint;
Bouras, Christos; Alexiou, Antonios; Kokkinos, Vasileios
Exploiting MIMO Technology for Optimal MBMS Power Allocation Journal Article
In: Wireless Personal Communications, Springer Verlang, pp. 447-464, pp. 447-464, 2011.
Abstract | Links | BibTeX | Tags:
@article{3100,
title = {Exploiting MIMO Technology for Optimal MBMS Power Allocation},
author = {Christos Bouras and Antonios Alexiou and Vasileios Kokkinos},
url = {https://telematics.upatras.gr/3150fulltextwpc/},
year = {2011},
date = {2011-01-01},
urldate = {2011-01-01},
journal = {Wireless Personal Communications, Springer Verlang, pp. 447-464},
pages = {447-464},
abstract = {In mobile networks, the provision of rich multimedia services, such as Mobile TV, is considered of key importance. To this end, Multimedia Broadcast/Multicast Service (MBMS) - that was introduced in the Release 6 of Universal Mobile Telecommunication System (UMTS) - is envisaged to play an instrumental role in the proliferation of mobile market. The reason behind the design of MBMS was the need to provide multiple users with the same data at the same time in 3GPP (3rd Generation Partnership Project) cellular networks. Still, MBMS performance is limited by the base stations? transmission power. As an aftermath, efficient power allocation techniques should be implemented so as to ensure the mass provision of multimedia applications to mobile users. This paper proposes a novel mechanism for efficient radio bearer selection during MBMS transmissions. The proposed mechanism is based on the concept of transport channels combination in any cell of the network. Furthermore, the mechanism exploits the performance enhancements emerged from Multiple Input Multiple Output (MIMO) antennas and manages to efficiently deliver multiple MBMS sessions. The proposed mechanism is thoroughly evaluated and compared with the radio bearer selection mechanisms proposed by 3GPP.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In mobile networks, the provision of rich multimedia services, such as Mobile TV, is considered of key importance. To this end, Multimedia Broadcast/Multicast Service (MBMS) - that was introduced in the Release 6 of Universal Mobile Telecommunication System (UMTS) - is envisaged to play an instrumental role in the proliferation of mobile market. The reason behind the design of MBMS was the need to provide multiple users with the same data at the same time in 3GPP (3rd Generation Partnership Project) cellular networks. Still, MBMS performance is limited by the base stations? transmission power. As an aftermath, efficient power allocation techniques should be implemented so as to ensure the mass provision of multimedia applications to mobile users. This paper proposes a novel mechanism for efficient radio bearer selection during MBMS transmissions. The proposed mechanism is based on the concept of transport channels combination in any cell of the network. Furthermore, the mechanism exploits the performance enhancements emerged from Multiple Input Multiple Output (MIMO) antennas and manages to efficiently deliver multiple MBMS sessions. The proposed mechanism is thoroughly evaluated and compared with the radio bearer selection mechanisms proposed by 3GPP.
Bouras, Christos; Alexiou, Antonios; Kokkinos, Vasileios; Rekkas, Evangelos
An Improved Mechanism for Multiple MBMS Sessions Assignment in B3G Cellurar Networks Journal Article
In: Wireless Networks, Springer Verlang, pp. 671-686, vol. 16, pp. 671 - 686, 2010.
Abstract | Links | BibTeX | Tags: MBMS, Power Control, UMTS
@article{3088,
title = {An Improved Mechanism for Multiple MBMS Sessions Assignment in B3G Cellurar Networks},
author = {Christos Bouras and Antonios Alexiou and Vasileios Kokkinos and Evangelos Rekkas},
url = {https://telematics.upatras.gr/3071winet/},
year = {2010},
date = {2010-01-01},
urldate = {2010-01-01},
journal = {Wireless Networks, Springer Verlang, pp. 671-686},
volume = {16},
pages = {671 - 686},
abstract = {In Universal Mobile Telecommunication System (UMTS), the downlink capacity is limited by the base station transmission power. Therefore, power control plays an important role to minimize the transmitted power shared among unicast and multicast users within a cell. In Multimedia Broadcast/Multicast Service (MBMS), power control targets to the efficient utilization of radio and network resources. However, the expected high demand for such services stresses the need for an efficient scheme, capable of dynamically allocating radio resources to parallel MBMS sessions. This paper proposes a power control mechanism for efficient MBMS session assignment in next generation UMTS networks. The mechanism shares efficiently the available power resources of UMTS base stations to MBMS sessions running in the network. Furthermore, the mechanism is evaluated through several realistic scenarios and the results indicate the ability of the mechanism to utilize efficiently the radio resources and to ensure the service continuity when parallel MBMS services run in the network. Our approach is compared with current 3rd Generation Partnership Project (3GPP) approaches, such as these presented in TS 25.346 and in TR 25.922, in order to highlight the enhancements that it provides.},
keywords = {MBMS, Power Control, UMTS},
pubstate = {published},
tppubtype = {article}
}
In Universal Mobile Telecommunication System (UMTS), the downlink capacity is limited by the base station transmission power. Therefore, power control plays an important role to minimize the transmitted power shared among unicast and multicast users within a cell. In Multimedia Broadcast/Multicast Service (MBMS), power control targets to the efficient utilization of radio and network resources. However, the expected high demand for such services stresses the need for an efficient scheme, capable of dynamically allocating radio resources to parallel MBMS sessions. This paper proposes a power control mechanism for efficient MBMS session assignment in next generation UMTS networks. The mechanism shares efficiently the available power resources of UMTS base stations to MBMS sessions running in the network. Furthermore, the mechanism is evaluated through several realistic scenarios and the results indicate the ability of the mechanism to utilize efficiently the radio resources and to ensure the service continuity when parallel MBMS services run in the network. Our approach is compared with current 3rd Generation Partnership Project (3GPP) approaches, such as these presented in TS 25.346 and in TR 25.922, in order to highlight the enhancements that it provides.
Bouras, Christos; Alexiou, Antonios; Kokkinos, Vasileios; Rekkas, Evangelos
Cost Analysis and Efficient Radio Bearer Selection for Multicasting over UMTS Journal Article
In: Wireless Communications and Mobile Computing, Wiley InterScience, pp. 1159 - 1172, 2009.
Abstract | Links | BibTeX | Tags: Cost analysis, MBMS, Power Control, UMTS
@article{3084,
title = {Cost Analysis and Efficient Radio Bearer Selection for Multicasting over UMTS},
author = {Christos Bouras and Antonios Alexiou and Vasileios Kokkinos and Evangelos Rekkas},
url = {https://telematics.upatras.gr/2561fulltext/},
year = {2009},
date = {2009-01-01},
urldate = {2009-01-01},
journal = {Wireless Communications and Mobile Computing, Wiley InterScience},
pages = {1159 - 1172},
abstract = {Along with the widespread deployment of the Third Generation (3G) cellular networks, the fast-improving capabilities of the mobile devices, content, and service providers are increasingly interested in supporting multicast communications over wireless networks and in particular over Universal Mobile Telecommunications System (UMTS). To this direction, the Third Generation Partnership Project (3GPP) is currently standardizing the Multimedia Broadcast/Multicast Service (MBMS) framework of UMTS. In this paper, we present an overview of the MBMS multicast mode of UMTS. We analytically present the multicast mode of the MBMS and analyze its performance in terms of packet delivery cost under various network topologies, cell types, and multicast users distributions. Furthermore, for the evaluation of the scheme, we consider different transport channels for the transmission of the multicast data over the UMTS Terrestrial Radio-Access Network (UTRAN) interfaces. Finally, we propose a scheme for the efficient radio bearer selection that minimizes total packet delivery cost.},
keywords = {Cost analysis, MBMS, Power Control, UMTS},
pubstate = {published},
tppubtype = {article}
}
Along with the widespread deployment of the Third Generation (3G) cellular networks, the fast-improving capabilities of the mobile devices, content, and service providers are increasingly interested in supporting multicast communications over wireless networks and in particular over Universal Mobile Telecommunications System (UMTS). To this direction, the Third Generation Partnership Project (3GPP) is currently standardizing the Multimedia Broadcast/Multicast Service (MBMS) framework of UMTS. In this paper, we present an overview of the MBMS multicast mode of UMTS. We analytically present the multicast mode of the MBMS and analyze its performance in terms of packet delivery cost under various network topologies, cell types, and multicast users distributions. Furthermore, for the evaluation of the scheme, we consider different transport channels for the transmission of the multicast data over the UMTS Terrestrial Radio-Access Network (UTRAN) interfaces. Finally, we propose a scheme for the efficient radio bearer selection that minimizes total packet delivery cost.
Bouras, Christos; Alexiou, Antonios; Kokkinos, Vasileios
Evaluation of Different Power Saving Techniques for MBMS Services Journal Article
In: EURASIP Journal on Wireless Communications and Networking, Hindawi Publishing Corporation, pp. 1 - 15, 2009.
Abstract | Links | BibTeX | Tags: LTE, MBMS, Power Control
@article{3091,
title = {Evaluation of Different Power Saving Techniques for MBMS Services},
author = {Christos Bouras and Antonios Alexiou and Vasileios Kokkinos},
url = {https://telematics.upatras.gr/1516785927/},
year = {2009},
date = {2009-01-01},
urldate = {2009-01-01},
journal = {EURASIP Journal on Wireless Communications and Networking, Hindawi Publishing Corporation},
pages = {1 - 15},
abstract = {Over the last years we have witnessed an explosive growth of multimedia computing, wireless communication and applications. Following the rapid increase in penetration rate of broadband services, the Third Generation Partnership Project (3GPP) is currently standardizing the Evolved-Multimedia Broadcast/Multicast Service (E-MBMS) framework of Long Term Evolution (LTE), the successor ofUniversalMobile Telecommunications System (UMTS).MBMS constitutes a point-to-multipoint downlink bearer service that was designed to significantly decrease the required radio and wired link resources. However, several obstacles regarding the high-power requirements should be overcome for the realization of MBMS. Techniques, such as Macrodiversity Combining and Rate Splitting, could be utilized to reduce the power requirement of delivering multicast traffic toMBMS users. In this paper, we analytically present several power saving techniques and analyze their performance in terms of power consumption. We provide simulation results that reveal the amount of power that is saved and reinforce the need for the usage of such techniques.},
keywords = {LTE, MBMS, Power Control},
pubstate = {published},
tppubtype = {article}
}
Over the last years we have witnessed an explosive growth of multimedia computing, wireless communication and applications. Following the rapid increase in penetration rate of broadband services, the Third Generation Partnership Project (3GPP) is currently standardizing the Evolved-Multimedia Broadcast/Multicast Service (E-MBMS) framework of Long Term Evolution (LTE), the successor ofUniversalMobile Telecommunications System (UMTS).MBMS constitutes a point-to-multipoint downlink bearer service that was designed to significantly decrease the required radio and wired link resources. However, several obstacles regarding the high-power requirements should be overcome for the realization of MBMS. Techniques, such as Macrodiversity Combining and Rate Splitting, could be utilized to reduce the power requirement of delivering multicast traffic toMBMS users. In this paper, we analytically present several power saving techniques and analyze their performance in terms of power consumption. We provide simulation results that reveal the amount of power that is saved and reinforce the need for the usage of such techniques.
Conferences
Tsachrelias, Konstantinos; Katsigiannis, Chrysostomos-Athanasios; Kokkinos, Vasileios; Gkamas, Apostolos; Bouras, Christos; Pouyioutas, Philippos
Enhancing Spectral Efficiency in 5G MIMO Networks Through Adaprive Beamforming Techniques Conference
The 7th International Conference on Advaced Communication Technologies and Networking (CommNet’24), Rabat, Morocco, no. 1- 7, 2024.
Abstract | Links | BibTeX | Tags:
@conference{nokeyg,
title = {Enhancing Spectral Efficiency in 5G MIMO Networks Through Adaprive Beamforming Techniques},
author = {Konstantinos Tsachrelias and Chrysostomos-Athanasios Katsigiannis and Vasileios Kokkinos and Apostolos Gkamas and Christos Bouras and Philippos Pouyioutas},
url = {https://bouras.upatras.gr/enhancing_spectral_efficiency_in_5g_mimo_networks_through_adaptive_beamforming_techniques/},
year = {2024},
date = {2024-12-04},
urldate = {2024-12-04},
booktitle = {The 7th International Conference on Advaced Communication Technologies and Networking (CommNet’24), Rabat, Morocco},
number = {1- 7},
abstract = {The evolution of 5G networks is driving advancements in data rates, latency reduction, and connectivity, with adaptive beamforming emerging as a core technology to enhance spectral efficiency. This study demonstrates how integrating beamforming with spatial filtering can effectively optimize signal quality in 5G MIMO networks. Through simulations, we show that our approach achieves significant
improvements in Signal-to-Noise Ratio (SNR) by optimizing beam directions. Specifically, results indicate that optimal beamforming angles can yield SNR values as high as 78 dB, substantially utperforming lower SNRs observed at less favorable angles. These findings underscore the potential of combined beamforming and spatial filtering to enhance communication reliability and network performance,
particularly in high-density settings},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The evolution of 5G networks is driving advancements in data rates, latency reduction, and connectivity, with adaptive beamforming emerging as a core technology to enhance spectral efficiency. This study demonstrates how integrating beamforming with spatial filtering can effectively optimize signal quality in 5G MIMO networks. Through simulations, we show that our approach achieves significant
improvements in Signal-to-Noise Ratio (SNR) by optimizing beam directions. Specifically, results indicate that optimal beamforming angles can yield SNR values as high as 78 dB, substantially utperforming lower SNRs observed at less favorable angles. These findings underscore the potential of combined beamforming and spatial filtering to enhance communication reliability and network performance,
particularly in high-density settings
improvements in Signal-to-Noise Ratio (SNR) by optimizing beam directions. Specifically, results indicate that optimal beamforming angles can yield SNR values as high as 78 dB, substantially utperforming lower SNRs observed at less favorable angles. These findings underscore the potential of combined beamforming and spatial filtering to enhance communication reliability and network performance,
particularly in high-density settings
Tsachrelias, Konstantinos; Katsigiannis, Chrysostomos-Athanasios; Kokkinos, Vasileios; Gkamas, Apostolos; Bouras, Christos; Pouyioutas, Philippos
Efficient User Equipment Distribution in DUDe 5G Network using Linear Assignment Algorithms Conference
16th Internaional Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT 2024), November 26 – 28, 2024, Grand Canaria Spain, pp. 1-6 (to appear), 2024.
Abstract | Links | BibTeX | Tags:
@conference{nokey,
title = {Efficient User Equipment Distribution in DUDe 5G Network using Linear Assignment Algorithms},
author = {Konstantinos Tsachrelias and Chrysostomos-Athanasios Katsigiannis and Vasileios Kokkinos and Apostolos Gkamas and Christos Bouras and Philippos Pouyioutas},
url = {https://telematics.upatras.gr/icumt2024_camera_ready/},
year = {2024},
date = {2024-11-26},
urldate = {2024-11-26},
booktitle = {16th Internaional Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT 2024), November 26 – 28, 2024, Grand Canaria Spain, pp. 1-6 (to appear)},
pages = {1 - 6 },
abstract = {In the context of 5G networks, efficient resource allocation plays a crucial role in meeting the diverse and demanding requirements of modern applications. This paper presents a novel approach for optimizing User Equipment (UE) distribution in Downlink/Uplink Decoupling (DUDe) 5G networks through the application of Linear Assignment Algorithms (LAAs). The proposed multi-objective framework intelligently allocates UEs to DUDe Base Stations, aiming to maximize network performance, achieve load balancing, enhance Signal-to-Noise Ratio (SNR), and optimize energy efficiency. The findings hold significant implications for network operators, facilitating the advancement of 5G infrastructures to meet the ever-increasing demand for seamless and high-quality connectivity.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
In the context of 5G networks, efficient resource allocation plays a crucial role in meeting the diverse and demanding requirements of modern applications. This paper presents a novel approach for optimizing User Equipment (UE) distribution in Downlink/Uplink Decoupling (DUDe) 5G networks through the application of Linear Assignment Algorithms (LAAs). The proposed multi-objective framework intelligently allocates UEs to DUDe Base Stations, aiming to maximize network performance, achieve load balancing, enhance Signal-to-Noise Ratio (SNR), and optimize energy efficiency. The findings hold significant implications for network operators, facilitating the advancement of 5G infrastructures to meet the ever-increasing demand for seamless and high-quality connectivity.
Bouras, Christos; Diasakos, Damianos; Gkamas, Apostolos; Kokkinos, Vasileios; Pouyioutas, Philippos; Prodromos, Nikolaos
Simulation – based Beamforming Optimization in Moving Drones Conference
15th IFIP Wireless and Mobile Computing (IFIP WMNC), November 11 – 12, 2024, Venice, Italy, pp 1-6 (to appear) , 2024.
Abstract | Links | BibTeX | Tags:
@conference{nokeyc,
title = {Simulation – based Beamforming Optimization in Moving Drones},
author = {Christos Bouras and Damianos Diasakos and Apostolos Gkamas and Vasileios Kokkinos and Philippos Pouyioutas and Nikolaos Prodromos},
url = {https://telematics.upatras.gr/simulation-based_beamforming_optimization_in_moving_drones/},
year = {2024},
date = {2024-11-12},
urldate = {2024-11-12},
booktitle = {15th IFIP Wireless and Mobile Computing (IFIP WMNC), November 11 – 12, 2024, Venice, Italy, pp 1-6 (to appear)
},
pages = {1 - 6},
abstract = {The integration of drone technology with 5G networks presents novel opportunities for enhancing wireless communication systems. This paper explores the application of beamforming optimization techniques in dynamic environments, specifically focusing on moving drones in a simulated environment based on the DeepMIMO O1 scenario. By leveraging the unique properties of the O1 drone setup of DeepMIMO simulation environment, which simulates realistic urban mobility patterns at millimeter-wave (mmWave) frequencies, we propose a novel beamforming algorithm designed to optimize the signal quality and stability in highly mobile aerial networks. Key performance metrics used in this study include Signal-to-Noise Ratio (SNR), battery consumption, and power consumption of both the drones and the base station. Our findings indicate that the adaptive beamforming algorithm not only enhances the SNR and reduces power consumption but also optimizes battery usage compared
to conventional beamforming methods. This study enhances the understanding of mmWave beamforming dynamics in aerial scenarios but also lays the groundwork for future advancements
in drone-based communication networks.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The integration of drone technology with 5G networks presents novel opportunities for enhancing wireless communication systems. This paper explores the application of beamforming optimization techniques in dynamic environments, specifically focusing on moving drones in a simulated environment based on the DeepMIMO O1 scenario. By leveraging the unique properties of the O1 drone setup of DeepMIMO simulation environment, which simulates realistic urban mobility patterns at millimeter-wave (mmWave) frequencies, we propose a novel beamforming algorithm designed to optimize the signal quality and stability in highly mobile aerial networks. Key performance metrics used in this study include Signal-to-Noise Ratio (SNR), battery consumption, and power consumption of both the drones and the base station. Our findings indicate that the adaptive beamforming algorithm not only enhances the SNR and reduces power consumption but also optimizes battery usage compared
to conventional beamforming methods. This study enhances the understanding of mmWave beamforming dynamics in aerial scenarios but also lays the groundwork for future advancements
in drone-based communication networks.
to conventional beamforming methods. This study enhances the understanding of mmWave beamforming dynamics in aerial scenarios but also lays the groundwork for future advancements
in drone-based communication networks.
Katsigiannis, Chrysostomos-Athanasios; Tsachrelias, Konstantinos; Kokkinos, Vasileios; Gkamas, Apostolos; Bouras, Christos; Pouyioutas, Philippos
Enhancing Real – Time IoT Applications: Latency Reduction Techniques in 5G MIMO Networks (to appear) Conference
The 19th International Conference on Broadband and Wireless Computing, Communication and Applications Communication and Applications (BWCCA 2024), November 13 – 15, 2024, San Benedetto del Tronto, Italy, pp.1-6 , vol. -, 2024.
Abstract | Links | BibTeX | Tags:
@conference{nokey,
title = {Enhancing Real – Time IoT Applications: Latency Reduction Techniques in 5G MIMO Networks (to appear)},
author = {Chrysostomos-Athanasios Katsigiannis and Konstantinos Tsachrelias and Vasileios Kokkinos and Apostolos Gkamas and Christos Bouras and Philippos Pouyioutas},
url = { https://telematics.upatras.gr/bwcca2024_bouras-1/},
year = {2024},
date = {2024-11-03},
urldate = {2024-11-03},
booktitle = {The 19th International Conference on Broadband and Wireless Computing, Communication and Applications Communication and Applications (BWCCA 2024), November 13 – 15, 2024, San Benedetto del Tronto, Italy, pp.1-6 },
volume = {-},
pages = {1 - 6 },
abstract = {In the ever-growing field of 5G technology, Massive Multiple Input Multiple Output (MIMO) systems hold the promise of substantial improvements in net-work capacity and efficiency. However, the demand for low latency, imposed by real-time Internet of Things (IoT) applications presents some significant obsta-cles. This study delves into novel approaches to reducing latency within 5G MIMO setups, focusing particularly on the integration of shortened Transmission Time Intervals (TTIs) and preemptive scheduling tactics. Through simulations in-volving a small-scale MIMO configuration servicing multiple IoT devices, this study thoroughly evaluates the effects of these methods on transmission latency. The desired result is to demonstrate that the adoption of reduced TTIs notably mitigates overall latency, thereby augmenting the efficacy of time-sensitive IoT tasks such as industrial automation and healthcare monitoring systems. This re-search not only contributes to the theoretical progression of 5G communications but also furnishes practical insights for network operators and system designers trying to fine-tune 5G networks for evolving IoT environments. The simulation results indicate that the proposed techniques significantly reduce latency by ap-proximately 30% compared to standard configurations, particularly benefiting high-priority IoT applications. These findings highlight the effectiveness of shortened TTIs and preemptive scheduling in enhancing the performance of real-time IoT tasks within 5G MIMO networks.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
In the ever-growing field of 5G technology, Massive Multiple Input Multiple Output (MIMO) systems hold the promise of substantial improvements in net-work capacity and efficiency. However, the demand for low latency, imposed by real-time Internet of Things (IoT) applications presents some significant obsta-cles. This study delves into novel approaches to reducing latency within 5G MIMO setups, focusing particularly on the integration of shortened Transmission Time Intervals (TTIs) and preemptive scheduling tactics. Through simulations in-volving a small-scale MIMO configuration servicing multiple IoT devices, this study thoroughly evaluates the effects of these methods on transmission latency. The desired result is to demonstrate that the adoption of reduced TTIs notably mitigates overall latency, thereby augmenting the efficacy of time-sensitive IoT tasks such as industrial automation and healthcare monitoring systems. This re-search not only contributes to the theoretical progression of 5G communications but also furnishes practical insights for network operators and system designers trying to fine-tune 5G networks for evolving IoT environments. The simulation results indicate that the proposed techniques significantly reduce latency by ap-proximately 30% compared to standard configurations, particularly benefiting high-priority IoT applications. These findings highlight the effectiveness of shortened TTIs and preemptive scheduling in enhancing the performance of real-time IoT tasks within 5G MIMO networks.
Prodromos, Nikolaos; Diasakos, Damianos; Kokkinos, Vasileios; Gkamas, Apostolos; Pouyioutas, Philippos; Bouras, Christos
Optimizing Network Slices: A Comparative Analysis of Allocation Algorithms for 5G Environments Conference
2024 International Conference on Future Communications and Networks (FCN 2024), November 18 - 22, 2024, Valetta, Malta (to appear), no. 1- 6, 2024.
@conference{nokeyb,
title = {Optimizing Network Slices: A Comparative Analysis of Allocation Algorithms for 5G Environments},
author = {Nikolaos Prodromos and Damianos Diasakos and Vasileios Kokkinos and Apostolos Gkamas and Philippos Pouyioutas and Christos Bouras},
url = {https://telematics.upatras.gr/fcn2024_camera_ready-1/},
year = {2024},
date = {2024-09-30},
urldate = {2024-09-30},
booktitle = {2024 International Conference on Future Communications and Networks (FCN 2024), November 18 - 22, 2024, Valetta, Malta (to appear)},
number = {1- 6},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Katsigiannis, Chrysostomos-Athanasios; Gkamas, Apostolos; Tsachrelias, Konstantinos; Bouras, Christos; Kokkinos, Vasileios; Pouyioutas, Philippos
Power Consumption Analysis in DUDe 5G MIMO Networks Conference
15th International Conference on Network of the Future (NoF 2024), October 2 – 4, 2024, Barcelona, Spain, 2024.
Abstract | Links | BibTeX | Tags:
@conference{4674,
title = {Power Consumption Analysis in DUDe 5G MIMO Networks},
author = {Chrysostomos-Athanasios Katsigiannis and Apostolos Gkamas and Konstantinos Tsachrelias and Christos Bouras and Vasileios Kokkinos and Philippos Pouyioutas},
url = {https://telematics.upatras.gr/1571017724nof2024-2/},
year = {2024},
date = {2024-01-01},
urldate = {2024-01-01},
booktitle = {15th International Conference on Network of the Future (NoF 2024), October 2 – 4, 2024, Barcelona, Spain},
abstract = {The advent of 5G technology has brought unprecedented advancements in wireless communication, promising higher data rates and improved user experiences. However, the implementation of Multiple-Input Multiple- Output (MIMO) techniques in 5G networks has significantly increased power consumption, posing a challenge to sustainability and operational costs. This study conducts a comparative analysis of energy efficiency in 5G MIMO networks, specifically between Downlink Uplink Coupling (DUCo) and Downlink Uplink Decoupling (DUDe) techniques. By examining the remaining power in the Base Stations (BSs) of the implemented Heterogeneous Network (HetNet), this analysis evaluates the potential of DUDe over DUCo in managing power consumption. The findings of this study aim to assist network operators, researchers, and policymakers in developing greener and more sustainable 5G infrastructures for a cleaner, energyefficient future.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The advent of 5G technology has brought unprecedented advancements in wireless communication, promising higher data rates and improved user experiences. However, the implementation of Multiple-Input Multiple- Output (MIMO) techniques in 5G networks has significantly increased power consumption, posing a challenge to sustainability and operational costs. This study conducts a comparative analysis of energy efficiency in 5G MIMO networks, specifically between Downlink Uplink Coupling (DUCo) and Downlink Uplink Decoupling (DUDe) techniques. By examining the remaining power in the Base Stations (BSs) of the implemented Heterogeneous Network (HetNet), this analysis evaluates the potential of DUDe over DUCo in managing power consumption. The findings of this study aim to assist network operators, researchers, and policymakers in developing greener and more sustainable 5G infrastructures for a cleaner, energyefficient future.