Christos Bouras
Short CV: Christos Bouras is Professor in the University of Patras, Department of Computer Engineering and Informatics. Also he is a scientific advisor of Research Unit 6 in Computer Technology Institute and Press – Diophantus, Patras, Greece. His research interests include Analysis of Performance of Networking and Computer Systems, Computer Networks and Protocols, Mobile and Wireless Communications, Telematics and New Services, QoS and Pricing for Networks and Services, e-learning, Networked Virtual Environments and WWW Issues. He has extended professional experience in Design and Analysis of Networks, Protocols, Telematics and New Services. He has published more than 450 papers in various well-known refereed books, conferences and journals. He is a co-author of 9 books in Greek and editor of 2 in English. He has been member of editorial board for international journals and PC member and referee in various international journals and conferences. He has participated in R&D projects.
Journal Articles
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; 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; 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; 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; Rekkas, Evangelos
An Improved MBMS Power Counting Mechanism towards Long Term Evolution Journal Article
In: Telecommunication Systems Journal, Springer Verlang, pp. 109-119, vol. 43, pp. 109 - 119, 2010.
Abstract | Links | BibTeX | Tags: LTE, MBMS, Power Control
@article{3089,
title = {An Improved MBMS Power Counting Mechanism towards Long Term Evolution},
author = {Christos Bouras and Antonios Alexiou and Evangelos Rekkas},
url = {https://telematics.upatras.gr/6676telsys/},
year = {2010},
date = {2010-01-01},
urldate = {2010-01-01},
journal = {Telecommunication Systems Journal, Springer Verlang, pp. 109-119},
volume = {43},
pages = {109 - 119},
abstract = {One of the key objectives of beyond 3rd generation mobile networks is the realization of enhanced end-user experience through the provision of rich multimedia services. Multimedia Broadcast/Multicast Services (MBMS) framework epitomizes the increasing popularity of such applications and is envisaged to play an instrumental role for the Long Term Evolution (LTE) proliferation in mobile market. For exploiting resource efficiency, MBMS specifications consider the Counting Mechanism which decides whether it is more efficient to deliver MBMS multicast traffic over Point-to-Point (PTP) or Point-to-Multipoint (PTM) bearers. However, the necessity to further improve MBMS resource efficiency and integrate new technologies in the frame of LTE stresses the need for an advanced Counting Mechanism. In this work we propose a novel Power Counting Mechanism for efficient selection of MBMS bearers. The proposed mechanism optimally utilizes power resources and exploits broadband characteristics and performance enhancements emerged from Multiple Input Multiple Output (MIMO) antennas used in LTE networks.},
keywords = {LTE, MBMS, Power Control},
pubstate = {published},
tppubtype = {article}
}
One of the key objectives of beyond 3rd generation mobile networks is the realization of enhanced end-user experience through the provision of rich multimedia services. Multimedia Broadcast/Multicast Services (MBMS) framework epitomizes the increasing popularity of such applications and is envisaged to play an instrumental role for the Long Term Evolution (LTE) proliferation in mobile market. For exploiting resource efficiency, MBMS specifications consider the Counting Mechanism which decides whether it is more efficient to deliver MBMS multicast traffic over Point-to-Point (PTP) or Point-to-Multipoint (PTM) bearers. However, the necessity to further improve MBMS resource efficiency and integrate new technologies in the frame of LTE stresses the need for an advanced Counting Mechanism. In this work we propose a novel Power Counting Mechanism for efficient selection of MBMS bearers. The proposed mechanism optimally utilizes power resources and exploits broadband characteristics and performance enhancements emerged from Multiple Input Multiple Output (MIMO) antennas used in LTE networks.
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
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Kontodimas, Konstantinos
A Simulation Framework for LTE-A Systems with Femtocell Overlays Conference
ACM PM2HW2N 2012 Workshop, Paphos, Cyprus, pp. 85-90, 2012.
Abstract | Links | BibTeX | Tags: Femtocell, LTE
@conference{3007,
title = {A Simulation Framework for LTE-A Systems with Femtocell Overlays},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Konstantinos Kontodimas},
url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/3407p85-bouras.pdf},
year = {2012},
date = {2012-10-01},
urldate = {2012-10-01},
booktitle = {ACM PM2HW2N 2012 Workshop, Paphos, Cyprus, pp. 85-90},
pages = {85 - 90},
abstract = {The use of femtocells is an efficient way to improve cover- age and quality of service while on the other side the deployment cost for the service provider is kept in extremely low level. Long Term Evolution Advanced (LTE-A) systems with femtocell overlays aim to provide better indoor voice and data coverage and to increase network capacity. One of the major technical challenges that femtocell networks are facing nowadays, is the cross-tier interference, i.e., the interference between the femto base stations and the macrocell infrastructure. To this direction, we have designed and implemented a framework that simulates femtocell overlays integrated over LTE-A macrocellular systems. This framework focuses on the impact of cross-tier interference and furthermore is able to estimate the throughput at every point of integrated femtocell/macrocell LTE-A networks. In this paper, we present the design and implementation of this simulation framework and we provide significant experimental results obtained with the aid of this system.},
keywords = {Femtocell, LTE},
pubstate = {published},
tppubtype = {conference}
}
The use of femtocells is an efficient way to improve cover- age and quality of service while on the other side the deployment cost for the service provider is kept in extremely low level. Long Term Evolution Advanced (LTE-A) systems with femtocell overlays aim to provide better indoor voice and data coverage and to increase network capacity. One of the major technical challenges that femtocell networks are facing nowadays, is the cross-tier interference, i.e., the interference between the femto base stations and the macrocell infrastructure. To this direction, we have designed and implemented a framework that simulates femtocell overlays integrated over LTE-A macrocellular systems. This framework focuses on the impact of cross-tier interference and furthermore is able to estimate the throughput at every point of integrated femtocell/macrocell LTE-A networks. In this paper, we present the design and implementation of this simulation framework and we provide significant experimental results obtained with the aid of this system.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Asimakis, Konstantinos
Genetic Optimization for Spectral Efficient Multicasting in LTE Systems Conference
Fifth IFIP Wireless and Mobile Networking Conference, Bratislava, Slovakia, pp. 54-59, 2012.
Abstract | Links | BibTeX | Tags: LTE, MBMS, MBSFN
@conference{3010,
title = {Genetic Optimization for Spectral Efficient Multicasting in LTE Systems},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Konstantinos Asimakis},
url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/Proceedings_WMNC_2012.pdf},
year = {2012},
date = {2012-09-01},
urldate = {2012-09-01},
booktitle = {Fifth IFIP Wireless and Mobile Networking Conference, Bratislava, Slovakia, pp. 54-59},
pages = {54-59},
abstract = {Past research has proposed the usage of assisting cells with Multimedia Broadcast/Multicast Service (MBMS) over a Single Frequency Network (MBSFN) to increase the Spectral Efficiency (SE) of LTE. In this paper we propose and investigate a method for optimizing the power consumption of the network while retaining an acceptable SE for most users. We design an algorithm that makes use of genetic optimization and analytical estimation of the SE. The algorithm is implemented in a novel simulation tool that allows experimentation over various user distributions and LTE deployments similar to the real-world ones. This simulation tool estimates the SE of each user and is able to optimize the network deployment by adjusting the individual transmission power levels for each cell.},
keywords = {LTE, MBMS, MBSFN},
pubstate = {published},
tppubtype = {conference}
}
Past research has proposed the usage of assisting cells with Multimedia Broadcast/Multicast Service (MBMS) over a Single Frequency Network (MBSFN) to increase the Spectral Efficiency (SE) of LTE. In this paper we propose and investigate a method for optimizing the power consumption of the network while retaining an acceptable SE for most users. We design an algorithm that makes use of genetic optimization and analytical estimation of the SE. The algorithm is implemented in a novel simulation tool that allows experimentation over various user distributions and LTE deployments similar to the real-world ones. This simulation tool estimates the SE of each user and is able to optimize the network deployment by adjusting the individual transmission power levels for each cell.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Tseliou, Georgia; Bilios, Dimitrios
A Performance Study of Fractional Frequency Reuse in OFDMA Networks Conference
Fifth IFIP Wireless and Mobile Networking Conference, Bratislava, Slovakia, pp. 38-43, 2012.
Abstract | Links | BibTeX | Tags: FFR, LTE
@conference{3008,
title = {A Performance Study of Fractional Frequency Reuse in OFDMA Networks},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Georgia Tseliou and Dimitrios Bilios},
url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/WMNC_20121.pdf},
year = {2012},
date = {2012-09-01},
urldate = {2012-09-01},
booktitle = {Fifth IFIP Wireless and Mobile Networking Conference, Bratislava, Slovakia, pp. 38-43},
pages = {38 - 43},
abstract = {Long Term Evolution (LTE) technology is considered as the most possible candidate for next generation mobile communications. 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 neighbor cells, the so called Inter-Cell Interference (ICI). Fractional Frequency Reuse (FFR) has been proposed as a technique to overcome this problem, since it can efficiently utilize the available frequency spectrum. This paper analyzes the FFR scheme and proposes a dynamic FFR mechanism that selects the optimal frequency allocation based on the cell total throughput and user satisfaction. In detail, the mechanism divides the cell into two regions (inner and outer) and selects the optimal size as well as the optimal frequency allocation between these regions with main target to maximize the overall throughput and user satisfaction. The mechanism is evaluated through several simulation scenariosthat incorporate users? mobility.},
keywords = {FFR, LTE},
pubstate = {published},
tppubtype = {conference}
}
Long Term Evolution (LTE) technology is considered as the most possible candidate for next generation mobile communications. 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 neighbor cells, the so called Inter-Cell Interference (ICI). Fractional Frequency Reuse (FFR) has been proposed as a technique to overcome this problem, since it can efficiently utilize the available frequency spectrum. This paper analyzes the FFR scheme and proposes a dynamic FFR mechanism that selects the optimal frequency allocation based on the cell total throughput and user satisfaction. In detail, the mechanism divides the cell into two regions (inner and outer) and selects the optimal size as well as the optimal frequency allocation between these regions with main target to maximize the overall throughput and user satisfaction. The mechanism is evaluated through several simulation scenariosthat incorporate users? mobility.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Kanakis, Nikos
Evaluating RaptorQ FEC over 3GPP Multicast Services Conference
The 8th International Wireless Communications & Mobile Computing Conference (IWCMC 2012), Limassol, Cyprus, pp. 257-262, 2012.
Abstract | Links | BibTeX | Tags: FEC, LTE, MBMS
@conference{2999,
title = {Evaluating RaptorQ FEC over 3GPP Multicast Services},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Nikos Kanakis},
url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/4189046_7137.pdf},
year = {2012},
date = {2012-08-01},
urldate = {2012-08-01},
booktitle = {The 8th International Wireless Communications & Mobile Computing Conference (IWCMC 2012), Limassol, Cyprus, pp. 257-262},
pages = {257 - 262},
abstract = {Third Generation Partnership Project (3GPP) introduced Multimedia Broadcast/Multicast Services (MBMS), in order to efficiently deliver the same content to multiple users over mobile cellular networks. To enhance the download and streaming delivery robustness against packet losses, 3GPP proposes the use of Forward Error Correction (FEC) on the application layer. The Application Layer FEC (AL-FEC) scheme that 3GPP standardized is based on the systematic, fountain Raptor code. In this work, in response to the emergence of an enhanced FEC scheme, we provide a performance evaluation of the existing standardized AL-FEC scheme with the newly introduced RaptorQ code. troducing a variety of simulation experiments, we analyze the performance behavior of each AL-FEC scheme considering several FEC encoding parameters. Furthermore, we
try to verify the improvements that have emerged in AL-FEC providing enhanced capabilities in multicast services over next generation mobile networks.},
keywords = {FEC, LTE, MBMS},
pubstate = {published},
tppubtype = {conference}
}
Third Generation Partnership Project (3GPP) introduced Multimedia Broadcast/Multicast Services (MBMS), in order to efficiently deliver the same content to multiple users over mobile cellular networks. To enhance the download and streaming delivery robustness against packet losses, 3GPP proposes the use of Forward Error Correction (FEC) on the application layer. The Application Layer FEC (AL-FEC) scheme that 3GPP standardized is based on the systematic, fountain Raptor code. In this work, in response to the emergence of an enhanced FEC scheme, we provide a performance evaluation of the existing standardized AL-FEC scheme with the newly introduced RaptorQ code. troducing a variety of simulation experiments, we analyze the performance behavior of each AL-FEC scheme considering several FEC encoding parameters. Furthermore, we
try to verify the improvements that have emerged in AL-FEC providing enhanced capabilities in multicast services over next generation mobile networks.
try to verify the improvements that have emerged in AL-FEC providing enhanced capabilities in multicast services over next generation mobile networks.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Kanakis, Nikos
Enhaning Reliable Mobile Multicasting with RaptorQ FEC Conference
17th IEEE Symposium on Computers andCommunication (ISCC), Cappadocia, Turkey, pp. 82-87, 2012.
Abstract | Links | BibTeX | Tags: FEC, LTE, MBMS
@conference{3000,
title = {Enhaning Reliable Mobile Multicasting with RaptorQ FEC},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Nikos Kanakis},
url = {https://telematics.upatras.gr/4588is041/},
year = {2012},
date = {2012-07-01},
urldate = {2012-07-01},
booktitle = {17th IEEE Symposium on Computers andCommunication (ISCC), Cappadocia, Turkey, pp. 82-87},
pages = {82-87},
abstract = {A crucial point on the successful deployment of multicast services is the enhanced reliability by means of advanced error control schemes. To this direction Third Generation
Partnership Project (3GPP) has standardized exclusively for Multimedia Broadcast/Multicast Services (MBMS) the use of a Forward Error Correction (FEC) mechanism on the application layer based on Raptor codes. Since the standardized systematic, fountain Raptor code is now considered obsolete, the emergence of a new variant of Raptor codes, named RaptorQ, provides enhanced capabilities for mobile multicast services. In this paper, we provide a performance comparison of the standardized Raptor Application Layer FEC (AL-FEC) scheme with the very promising RaptorQ FEC code. We examine the enhancements that RaptorQ introduces on the AL-FEC protection robustness, providing a thorough performance analysis in comparison with the current Raptor FEC scheme. Furthermore, in order to verify the improved performance of RaptorQ, we provide several simulation results utilizing the ns-3 environment, considering the application of both the examined AL-FEC schemes over multicast services for next generation mobile networks.},
keywords = {FEC, LTE, MBMS},
pubstate = {published},
tppubtype = {conference}
}
A crucial point on the successful deployment of multicast services is the enhanced reliability by means of advanced error control schemes. To this direction Third Generation
Partnership Project (3GPP) has standardized exclusively for Multimedia Broadcast/Multicast Services (MBMS) the use of a Forward Error Correction (FEC) mechanism on the application layer based on Raptor codes. Since the standardized systematic, fountain Raptor code is now considered obsolete, the emergence of a new variant of Raptor codes, named RaptorQ, provides enhanced capabilities for mobile multicast services. In this paper, we provide a performance comparison of the standardized Raptor Application Layer FEC (AL-FEC) scheme with the very promising RaptorQ FEC code. We examine the enhancements that RaptorQ introduces on the AL-FEC protection robustness, providing a thorough performance analysis in comparison with the current Raptor FEC scheme. Furthermore, in order to verify the improved performance of RaptorQ, we provide several simulation results utilizing the ns-3 environment, considering the application of both the examined AL-FEC schemes over multicast services for next generation mobile networks.
Partnership Project (3GPP) has standardized exclusively for Multimedia Broadcast/Multicast Services (MBMS) the use of a Forward Error Correction (FEC) mechanism on the application layer based on Raptor codes. Since the standardized systematic, fountain Raptor code is now considered obsolete, the emergence of a new variant of Raptor codes, named RaptorQ, provides enhanced capabilities for mobile multicast services. In this paper, we provide a performance comparison of the standardized Raptor Application Layer FEC (AL-FEC) scheme with the very promising RaptorQ FEC code. We examine the enhancements that RaptorQ introduces on the AL-FEC protection robustness, providing a thorough performance analysis in comparison with the current Raptor FEC scheme. Furthermore, in order to verify the improved performance of RaptorQ, we provide several simulation results utilizing the ns-3 environment, considering the application of both the examined AL-FEC schemes over multicast services for next generation mobile networks.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Kavourgias, Georgios
Interference Management in LTE Femtocell Systems Using an Adaptive Frequency Reuse Scheme Conference
Wireless Telecommunications Symposium (WTS 2012), London, UK, pp. 1-7, 2012.
Abstract | Links | BibTeX | Tags: Femtocell, FFR, LTE
@conference{2997,
title = {Interference Management in LTE Femtocell Systems Using an Adaptive Frequency Reuse Scheme},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Georgios Kavourgias},
url = {https://telematics.upatras.gr/wp-content/uploads/2024/01/5956WTS.pdf},
year = {2012},
date = {2012-04-01},
urldate = {2012-04-01},
booktitle = {Wireless Telecommunications Symposium (WTS 2012), London, UK, pp. 1-7},
pages = {1 - 7 },
abstract = {Long Term Evolution (LTE) has developed a new technology in order to enhance indoor coverage. This new technology is called femtocells and is achieved with the use of
access points installed by home users. However, interference problem between the femtocell and the macrocell decreases the system’s capacity and as a result users’ throughput. In this paper we study the interference mitigation techniques in femtocell/macrocell networks and we propose a frequency reuse mechanism that leads to increased overall system performance. In particular, the mechanism aims to maximize throughput via a variety of combinations between inner cell radius and frequency
allocation to the macrocell. Additionally, a position minded frequency allocation to the femtocells targets to further optimize the total throughput of the cell.},
keywords = {Femtocell, FFR, LTE},
pubstate = {published},
tppubtype = {conference}
}
Long Term Evolution (LTE) has developed a new technology in order to enhance indoor coverage. This new technology is called femtocells and is achieved with the use of
access points installed by home users. However, interference problem between the femtocell and the macrocell decreases the system’s capacity and as a result users’ throughput. In this paper we study the interference mitigation techniques in femtocell/macrocell networks and we propose a frequency reuse mechanism that leads to increased overall system performance. In particular, the mechanism aims to maximize throughput via a variety of combinations between inner cell radius and frequency
allocation to the macrocell. Additionally, a position minded frequency allocation to the femtocells targets to further optimize the total throughput of the cell.
access points installed by home users. However, interference problem between the femtocell and the macrocell decreases the system’s capacity and as a result users’ throughput. In this paper we study the interference mitigation techniques in femtocell/macrocell networks and we propose a frequency reuse mechanism that leads to increased overall system performance. In particular, the mechanism aims to maximize throughput via a variety of combinations between inner cell radius and frequency
allocation to the macrocell. Additionally, a position minded frequency allocation to the femtocells targets to further optimize the total throughput of the cell.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Tseliou, Georgia; Bilios, Dimitrios
Optimization of Fractional Frequency Reuse in Long Term Evolution Networks Conference
2012 IEEE Wireless Communications and Networking Conference (WCNC 2012), Paris, France, pp. 1875-1879, 2012.
Abstract | Links | BibTeX | Tags: FFR, LTE
@conference{2995,
title = {Optimization of Fractional Frequency Reuse 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/3709p1875-bilios/},
year = {2012},
date = {2012-04-01},
urldate = {2012-04-01},
booktitle = {2012 IEEE Wireless Communications and Networking Conference (WCNC 2012), Paris, France, pp. 1875-1879},
pages = {1875-1879},
abstract = {In cellular systems, Fractional Frequency Reuse (FFR) partitions each cell into two regions; inner region and outer region and allocates different frequency band to each region. Since the users at the inner region are less exposed to inter-cell interference, the frequency resources in each inner region can be universally used. Based on this frequency band allocation, FFR may reduce channel interference and offer large system capacity. This paper proposes a mechanism that selects the optimal FFR
scheme based on the user throughput and user satisfaction. In detail, the mechanism selects the optimal size of the inner and outer region for each cell as well as the optimal frequency allocation between these regions that either maximizes the mean user throughput or the user satisfaction. The mechanism is evaluated through several simulation scenarios.},
keywords = {FFR, LTE},
pubstate = {published},
tppubtype = {conference}
}
In cellular systems, Fractional Frequency Reuse (FFR) partitions each cell into two regions; inner region and outer region and allocates different frequency band to each region. Since the users at the inner region are less exposed to inter-cell interference, the frequency resources in each inner region can be universally used. Based on this frequency band allocation, FFR may reduce channel interference and offer large system capacity. This paper proposes a mechanism that selects the optimal FFR
scheme based on the user throughput and user satisfaction. In detail, the mechanism selects the optimal size of the inner and outer region for each cell as well as the optimal frequency allocation between these regions that either maximizes the mean user throughput or the user satisfaction. The mechanism is evaluated through several simulation scenarios.
scheme based on the user throughput and user satisfaction. In detail, the mechanism selects the optimal size of the inner and outer region for each cell as well as the optimal frequency allocation between these regions that either maximizes the mean user throughput or the user satisfaction. The mechanism is evaluated through several simulation scenarios.
Bouras, Christos; Papazois, Andreas; Kokkinos, Vasileios; Kanakis, Nikos
AL-FEC for Streaming Services over LTE Systems Conference
14th International Symposiumon Wireless Personal Multimedia Communications, Brest, France, pp. 284-288, 2011.
Abstract | Links | BibTeX | Tags: FEC, LTE, MBMS
@conference{2990,
title = {AL-FEC for Streaming Services over LTE Systems},
author = {Christos Bouras and Andreas Papazois and Vasileios Kokkinos and Nikos Kanakis},
url = {https://telematics.upatras.gr/4760pid1999633/},
year = {2011},
date = {2011-10-01},
urldate = {2011-10-01},
booktitle = {14th International Symposiumon Wireless Personal Multimedia Communications, Brest, France, pp. 284-288},
pages = {284-288},
abstract = {The Third Generation Partnership Project (3GPP), recently introduced the evolution of the third generation (3G) cellular networks, the Long Term Evolution (LTE) telecommunication system. A key aspect of LTE specifications is the enhancement of Multimedia Broadcast/Multicast Services (MBMS), where the same content is transmitted to multiple users located in a specific service area. A significant point of the demanding multimedia services is the enhancement of the robustness against packet losses. To this direction, in order to support the efficient point-to-multipoint download and streaming delivery, 3GPP has included an Application Layer Forward Error Correction (AL-FEC) scheme in the MBMS standard. The standardized AL-FEC scheme is based on the systematic, fountain Raptor codes. In this paper, we investigate the application of AL-FEC over the MBMS streaming delivery method. We consider the benefits of AL-FEC for a seamless multimedia streaming transmission to multiple mobile users and we examine how the amount of FEC overhead can be adjusted under different packet loss conditions. For this purpose, we present a variety of realistic simulation scenarios for the performance evaluation of FEC considering several network and FEC encoding parameters. Furthermore, we provide suggestions in order to achieve efficient use of Raptor codes over LTE MBMS streaming services.},
keywords = {FEC, LTE, MBMS},
pubstate = {published},
tppubtype = {conference}
}
The Third Generation Partnership Project (3GPP), recently introduced the evolution of the third generation (3G) cellular networks, the Long Term Evolution (LTE) telecommunication system. A key aspect of LTE specifications is the enhancement of Multimedia Broadcast/Multicast Services (MBMS), where the same content is transmitted to multiple users located in a specific service area. A significant point of the demanding multimedia services is the enhancement of the robustness against packet losses. To this direction, in order to support the efficient point-to-multipoint download and streaming delivery, 3GPP has included an Application Layer Forward Error Correction (AL-FEC) scheme in the MBMS standard. The standardized AL-FEC scheme is based on the systematic, fountain Raptor codes. In this paper, we investigate the application of AL-FEC over the MBMS streaming delivery method. We consider the benefits of AL-FEC for a seamless multimedia streaming transmission to multiple mobile users and we examine how the amount of FEC overhead can be adjusted under different packet loss conditions. For this purpose, we present a variety of realistic simulation scenarios for the performance evaluation of FEC considering several network and FEC encoding parameters. Furthermore, we provide suggestions in order to achieve efficient use of Raptor codes over LTE MBMS streaming services.
Bouras, Christos; Alexiou, Antonios; Papazois, Andreas; Kokkinos, Vasileios; Kontodimas, Konstantinos
Interference Behavior of Integrated Femto and Macrocell Environments Conference
IFIP Wireless Days 2011, Niagara Falls, Ontario, Canada, pp. 1-5, 2011.
Abstract | Links | BibTeX | Tags: Femtocell, LTE
@conference{2991,
title = {Interference Behavior of Integrated Femto and Macrocell Environments},
author = {Christos Bouras and Antonios Alexiou and Andreas Papazois and Vasileios Kokkinos and Konstantinos Kontodimas},
url = {https://telematics.upatras.gr/25171569481919/},
year = {2011},
date = {2011-10-01},
urldate = {2011-10-01},
booktitle = {IFIP Wireless Days 2011, Niagara Falls, Ontario, Canada, pp. 1-5},
pages = {1 - 5},
abstract = {Femtocells are data access points installed by the subscribers to provide better indoor voice and data coverage and to increase system capacity. The integrated femtocell/macrocell networks offer an efficient way to increase access capacity by improving coverage and quality of service while on the other side the deployment cost for the service provider is kept in extremely low levels. One of the major technical challenges that femtocell networks are facing is their interference behavior when they are placed within macrocells. The study presented in this paper focuses on the impact of integrating femtocells in macrocell networks in terms of adjacent cell interference that the macrocell environment adds to users served by a femto base station and vice versa. To this direction, we have designed and implemented a simulation testbed that stimates the cross-tier interference and the throughput in every point of an integrated femtocell/macrocell Long Term Evolution-Advanced (LTE-A) network.},
keywords = {Femtocell, LTE},
pubstate = {published},
tppubtype = {conference}
}
Femtocells are data access points installed by the subscribers to provide better indoor voice and data coverage and to increase system capacity. The integrated femtocell/macrocell networks offer an efficient way to increase access capacity by improving coverage and quality of service while on the other side the deployment cost for the service provider is kept in extremely low levels. One of the major technical challenges that femtocell networks are facing is their interference behavior when they are placed within macrocells. The study presented in this paper focuses on the impact of integrating femtocells in macrocell networks in terms of adjacent cell interference that the macrocell environment adds to users served by a femto base station and vice versa. To this direction, we have designed and implemented a simulation testbed that stimates the cross-tier interference and the throughput in every point of an integrated femtocell/macrocell Long Term Evolution-Advanced (LTE-A) network.
Bouras, Christos; Alexiou, Antonios; Papazois, Andreas; Kokkinos, Vasileios; Asimakis, Konstantinos; Tseliou, Georgia
Reliable Multicasting over LTE: A Performance Study Conference
16th IEEE Symposioum on Computers and Communications (ISCC 2011), Kerkyra, Greece, pp. 603-608, 2011.
Abstract | Links | BibTeX | Tags: FEC, LTE, MBMS, MBSFN
@conference{2983,
title = {Reliable Multicasting over LTE: A Performance Study},
author = {Christos Bouras and Antonios Alexiou and Andreas Papazois and Vasileios Kokkinos and Konstantinos Asimakis and Georgia Tseliou},
url = {https://telematics.upatras.gr/2179cc_070/},
year = {2011},
date = {2011-06-01},
urldate = {2011-06-01},
booktitle = {16th IEEE Symposioum on Computers and Communications (ISCC 2011), Kerkyra, Greece, pp. 603-608},
pages = {603 - 608},
abstract = {With the booming of multimedia services, the 3rd Generation Partnership Project (3GPP) has introduced the evolved Multimedia Multicast/Broadcast Service (e-MBMS)
feature for LTE systems. The main objective of MBMS is to introduce real broadcast distribution capabilities into cellular systems. This purposed 3GPP to introduce the MBMS over a Single Frequency Network (MBSFN) operation. In this work we investigate the provision of MBMS service over a combination of MBSFN and PTM transmission schemes. We focus on the file repair procedure, because the distribution of binary data via MBMS must result in 100% error-free downloaded files. In order to achieve this goal, MBMS offers a Forward Error Correction (FEC) mechanism. Our simulation results show that there are some file repair schemes that achieve better performance as far as different network configurations are concerned. Furthermore, we compare all the file recovery methods and evaluate them against various network parameters in a realistic simulation environment.},
keywords = {FEC, LTE, MBMS, MBSFN},
pubstate = {published},
tppubtype = {conference}
}
With the booming of multimedia services, the 3rd Generation Partnership Project (3GPP) has introduced the evolved Multimedia Multicast/Broadcast Service (e-MBMS)
feature for LTE systems. The main objective of MBMS is to introduce real broadcast distribution capabilities into cellular systems. This purposed 3GPP to introduce the MBMS over a Single Frequency Network (MBSFN) operation. In this work we investigate the provision of MBMS service over a combination of MBSFN and PTM transmission schemes. We focus on the file repair procedure, because the distribution of binary data via MBMS must result in 100% error-free downloaded files. In order to achieve this goal, MBMS offers a Forward Error Correction (FEC) mechanism. Our simulation results show that there are some file repair schemes that achieve better performance as far as different network configurations are concerned. Furthermore, we compare all the file recovery methods and evaluate them against various network parameters in a realistic simulation environment.
feature for LTE systems. The main objective of MBMS is to introduce real broadcast distribution capabilities into cellular systems. This purposed 3GPP to introduce the MBMS over a Single Frequency Network (MBSFN) operation. In this work we investigate the provision of MBMS service over a combination of MBSFN and PTM transmission schemes. We focus on the file repair procedure, because the distribution of binary data via MBMS must result in 100% error-free downloaded files. In order to achieve this goal, MBMS offers a Forward Error Correction (FEC) mechanism. Our simulation results show that there are some file repair schemes that achieve better performance as far as different network configurations are concerned. Furthermore, we compare all the file recovery methods and evaluate them against various network parameters in a realistic simulation environment.
Bouras, Christos; Alexiou, Antonios; Papazois, Andreas; Kokkinos, Vasileios; Tseliou, Georgia
Optimizing the Combination of MBSFN and PTM Transmissions in LTE Systems Conference
Tenth Annual Wireless Telecommunications Symposium (WTS 2011), New York, USA, pp. 1-7, 2011.
Abstract | Links | BibTeX | Tags: LTE, MBMS, MBSFN
@conference{2982,
title = {Optimizing the Combination of MBSFN and PTM Transmissions in LTE Systems},
author = {Christos Bouras and Antonios Alexiou and Andreas Papazois and Vasileios Kokkinos and Georgia Tseliou},
url = {https://telematics.upatras.gr/41721569411933/},
year = {2011},
date = {2011-04-01},
urldate = {2011-04-01},
booktitle = {Tenth Annual Wireless Telecommunications Symposium (WTS 2011), New York, USA, pp. 1-7},
pages = {1 - 7},
abstract = {The 3rd Generation Partnership Project (3GPP) has introduced the evolved Multimedia Broadcast/Multicast Service (e-MBMS) feature for cellular systems as an evolution to the existing MBMS service. To support e-MBMS in Long Term Evolution (LTE) systems, 3GPP recommends the use of Point-to- Multipoint (PTM) transmissions and MBMS over a Single Frequency Network (MBSFN). MBSFN is a new feature where a time-synchronized common waveform is transmitted from multiple cells. In this paper we investigate the provision of MBMS service over a combination of MBSFN and PTM transmission methods. A cost analysis of the MBMS service is presented based on the transmission cost over all the interfaces and nodes of the LTE architecture. We evaluate the performance of this transmission scheme from telecommunication cost perspective and we compare it with other transmission schemes. The performance evaluation has been performed with the aid of a new simulation tool that estimates the cost for the MBMS provision under different network topologies, MBSFN deployments and user distributions.},
keywords = {LTE, MBMS, MBSFN},
pubstate = {published},
tppubtype = {conference}
}
The 3rd Generation Partnership Project (3GPP) has introduced the evolved Multimedia Broadcast/Multicast Service (e-MBMS) feature for cellular systems as an evolution to the existing MBMS service. To support e-MBMS in Long Term Evolution (LTE) systems, 3GPP recommends the use of Point-to- Multipoint (PTM) transmissions and MBMS over a Single Frequency Network (MBSFN). MBSFN is a new feature where a time-synchronized common waveform is transmitted from multiple cells. In this paper we investigate the provision of MBMS service over a combination of MBSFN and PTM transmission methods. A cost analysis of the MBMS service is presented based on the transmission cost over all the interfaces and nodes of the LTE architecture. We evaluate the performance of this transmission scheme from telecommunication cost perspective and we compare it with other transmission schemes. The performance evaluation has been performed with the aid of a new simulation tool that estimates the cost for the MBMS provision under different network topologies, MBSFN deployments and user distributions.
Bouras, Christos; Alexiou, Antonios; Papazois, Andreas; Kokkinos, Vasileios; Asimakis, Konstantinos
Combining MBSFN and PTM Transmissions Schemes for Resource Efficiency in LTE Networks Conference
9th International Conference on Wired/Wireless Internet Communications, Vilanova I la Geltru, Barcelona, Spain, June 15 - 17, 2011, pp. 56-67, 2011.
Abstract | Links | BibTeX | Tags: LTE, MBMS, MBSFN
@conference{2984,
title = {Combining MBSFN and PTM Transmissions Schemes for Resource Efficiency in LTE Networks},
author = {Christos Bouras and Antonios Alexiou and Andreas Papazois and Vasileios Kokkinos and Konstantinos Asimakis},
url = {https://telematics.upatras.gr/1517alexiou_wwic_2011_cr/},
year = {2011},
date = {2011-01-01},
urldate = {2011-01-01},
booktitle = {9th International Conference on Wired/Wireless Internet Communications, Vilanova I la Geltru, Barcelona, Spain, June 15 - 17, 2011, pp. 56-67},
pages = {56 - 67},
abstract = {Long Term Evolution (LTE) systems allow the transmission of rich multimedia services by utilizing the Multimedia Broadcast/Multicast Service (MBMS) over a Single Frequency Network (MBSFN). During MBSFN transmission a time-synchronized common waveform is transmitted from multiple cells. The 3rd Generation Partnership Project (3GPP) has specified that Point-to-Multipoint (PTM) transmission can be used in combination with MBSFN to provide MBMS-based services. In this paper we evaluate the combined transmission scheme in terms of Resource Efficiency (RE). The evaluation is performed through simulation experiments for various user distributions and LTE network configurations. The experiments are conducted with the aid of a proposed algorithm, which estimates the Spectral Efficiency (SE) of each cell and the RE of the network, and is also able to formulate the optimal network deployment that maximizes the network?s RE. For each of the examined scenarios, we present the most efficient solution (in terms of RE) selected by our algorithm and we compare it with other transmission schemes.},
keywords = {LTE, MBMS, MBSFN},
pubstate = {published},
tppubtype = {conference}
}
Long Term Evolution (LTE) systems allow the transmission of rich multimedia services by utilizing the Multimedia Broadcast/Multicast Service (MBMS) over a Single Frequency Network (MBSFN). During MBSFN transmission a time-synchronized common waveform is transmitted from multiple cells. The 3rd Generation Partnership Project (3GPP) has specified that Point-to-Multipoint (PTM) transmission can be used in combination with MBSFN to provide MBMS-based services. In this paper we evaluate the combined transmission scheme in terms of Resource Efficiency (RE). The evaluation is performed through simulation experiments for various user distributions and LTE network configurations. The experiments are conducted with the aid of a proposed algorithm, which estimates the Spectral Efficiency (SE) of each cell and the RE of the network, and is also able to formulate the optimal network deployment that maximizes the network?s RE. For each of the examined scenarios, we present the most efficient solution (in terms of RE) selected by our algorithm and we compare it with other transmission schemes.
Bouras, Christos; Alexiou, Antonios; Papazois, Andreas; Kokkinos, Vasileios; Tseliou, Georgia
Enhancing FEC Application in LTE Cellular Networks Conference
IFIP Wireless Days 2010, Venice, Italy, pp. 1-5, 2010.
Abstract | Links | BibTeX | Tags: FEC, LTE, MBMS, MBSFN
@conference{2979,
title = {Enhancing FEC Application in LTE Cellular Networks},
author = {Christos Bouras and Antonios Alexiou and Andreas Papazois and Vasileios Kokkinos and Georgia Tseliou},
url = {https://telematics.upatras.gr/3883wd_2/},
year = {2010},
date = {2010-10-01},
urldate = {2010-10-01},
booktitle = {IFIP Wireless Days 2010, Venice, Italy, pp. 1-5},
pages = {1 - 5},
abstract = {3rd Generation Partnership Project?s (3GPP) Long Term Evolution (LTE) is focused on enhancing the Universal Terrestrial Radio Access (UTRA). Evolved-Multimedia Broadcast and Multicast Service (e-MBMS) uses Multimedia Broadcast over a Single Frequency Network (MBSFN) operation in order to improve its performance. In MBSFN operation, data are transmitted simultaneously over the air from multiple tightly time-synchronized cells. Raptor codes have been standardized as the main application layer Forward Error Correction (FEC) method for e-MBMS due to the advanced error protection they offer and their overall performance. In this study, we investigate the application of FEC in MBSFN-enabled LTE cellular networks and we propose a new scheme that takes into account the properties of MBSFN in order to provide a more efficient operation of FEC during e-MBMS transmissions. The proposed scheme is compared with other file recovery methods and is evaluated against various network parameters in a realistic simulation environment.},
keywords = {FEC, LTE, MBMS, MBSFN},
pubstate = {published},
tppubtype = {conference}
}
3rd Generation Partnership Project?s (3GPP) Long Term Evolution (LTE) is focused on enhancing the Universal Terrestrial Radio Access (UTRA). Evolved-Multimedia Broadcast and Multicast Service (e-MBMS) uses Multimedia Broadcast over a Single Frequency Network (MBSFN) operation in order to improve its performance. In MBSFN operation, data are transmitted simultaneously over the air from multiple tightly time-synchronized cells. Raptor codes have been standardized as the main application layer Forward Error Correction (FEC) method for e-MBMS due to the advanced error protection they offer and their overall performance. In this study, we investigate the application of FEC in MBSFN-enabled LTE cellular networks and we propose a new scheme that takes into account the properties of MBSFN in order to provide a more efficient operation of FEC during e-MBMS transmissions. The proposed scheme is compared with other file recovery methods and is evaluated against various network parameters in a realistic simulation environment.
Bouras, Christos; Alexiou, Antonios; Papazois, Andreas; Kokkinos, Vasileios; Tsichritzis, George
Efficient MCS Selection for MBSFN Transmissions over LTE Networks Conference
IFIP Wireless Days 2010, Venice, Italy, pp. 1-5, 2010.
Abstract | Links | BibTeX | Tags: LTE, MBMS, MBSFN, MCS
@conference{2978,
title = {Efficient MCS Selection for MBSFN Transmissions over LTE Networks},
author = {Christos Bouras and Antonios Alexiou and Andreas Papazois and Vasileios Kokkinos and George Tsichritzis},
url = {https://telematics.upatras.gr/3975wd_1/},
year = {2010},
date = {2010-10-01},
urldate = {2010-10-01},
booktitle = {IFIP Wireless Days 2010, Venice, Italy, pp. 1-5},
pages = {1 - 5},
abstract = {Long Term Evolution (LTE), the next-generation network beyond 3G, is designed to support the explosion in demand for bandwidth-hungry multimedia services that are
already experienced in wired networks. To support Multimedia Broadcast/Multicast Services (MBMS), LTE offers functionality to transmit MBMS over a Single Frequency Network (MBSFN), where a time-synchronized common waveform is transmitted from multiple cells for a given duration. This significantly improves the Spectral Efficiency (SE) compared to conventional MBMS operation. The achieved SE is mainly determined by the Modulation and Coding Scheme (MCS) utilized by the LTE
physical layer. In this paper we propose and evaluate four approaches for the selection of the MCS that will be utilized for the transmission of the MBSFN data. The evaluation of the approaches is performed for different users distribution and from SE perspective. Based on the SE measurement, we determine the most suitable approach for the corresponding users distribution.},
keywords = {LTE, MBMS, MBSFN, MCS},
pubstate = {published},
tppubtype = {conference}
}
Long Term Evolution (LTE), the next-generation network beyond 3G, is designed to support the explosion in demand for bandwidth-hungry multimedia services that are
already experienced in wired networks. To support Multimedia Broadcast/Multicast Services (MBMS), LTE offers functionality to transmit MBMS over a Single Frequency Network (MBSFN), where a time-synchronized common waveform is transmitted from multiple cells for a given duration. This significantly improves the Spectral Efficiency (SE) compared to conventional MBMS operation. The achieved SE is mainly determined by the Modulation and Coding Scheme (MCS) utilized by the LTE
physical layer. In this paper we propose and evaluate four approaches for the selection of the MCS that will be utilized for the transmission of the MBSFN data. The evaluation of the approaches is performed for different users distribution and from SE perspective. Based on the SE measurement, we determine the most suitable approach for the corresponding users distribution.
already experienced in wired networks. To support Multimedia Broadcast/Multicast Services (MBMS), LTE offers functionality to transmit MBMS over a Single Frequency Network (MBSFN), where a time-synchronized common waveform is transmitted from multiple cells for a given duration. This significantly improves the Spectral Efficiency (SE) compared to conventional MBMS operation. The achieved SE is mainly determined by the Modulation and Coding Scheme (MCS) utilized by the LTE
physical layer. In this paper we propose and evaluate four approaches for the selection of the MCS that will be utilized for the transmission of the MBSFN data. The evaluation of the approaches is performed for different users distribution and from SE perspective. Based on the SE measurement, we determine the most suitable approach for the corresponding users distribution.