01838nas a2200145   4500008004100000245007300041210006900114260001900183520129100202653000801493100002101501700002401522700002401546856012201570       2013                        eng d00aMobility MCS Selection Mechanisms for Multicasting over LTE Networks0 aMobility MCS Selection Mechanisms for Multicasting over LTE Netw  cApril 23 -? 253 a<p>In Long Term Evolution (LTE) networks, the Multimedia Broadcast/Multicast Services over Single Frequency Network (MBSFN) operation enables the delivery of the same multimedia content to a set or all the users in a cell, leading in this way to efficient utilization of the network resources. This is achieved through a time-synchronized common waveform that is transmitted from multiple cells for a given duration, which enables over-the-air combining, and therefore significantly improves the spectral efficiency. However, the performance of MBSFN is directly connected to the Modulation and Coding Scheme (MCS) and the transmission mode that will be selected for the delivery of the multimedia data. This paper proposes three different approaches for the selection of the MCS during MBSFN transmissions. Main target is to determine the most efficient approach depending on the target that the operator may set, i.e. the approach that either maximizes the spectral efficiency or achieves a target spectral efficiency for various user distributions. The performance of the approaches is evaluated for scenarios that include users? mobility and for three different transmission modes in order to also examine the effectiveness of Multiple Input Multiple Output (MIMO) techniques.</p>
10aMCS1 aBouras, Christos1 aKokkinos, Vasileios1 aBochrini, Stavroula  uhttp://telematics.upatras.gr/telematics/publications/mobility-mcs-selection-mechanisms-multicasting-over-lte-networks01987nas a2200205   4500008004100000245013600041210006900177300001400246490000700260520122000267653000801487653001001495653000801505100002101513700002201534700002201556700002401578700002401602856015501626       2013                        eng d00aModulation and coding scheme selection in multimedia broadcast over a single frequency network-enabled long-term evolution networks0 aModulation and coding scheme selection in multimedia broadcast o  a1603-16190 v253 a<p>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 &amp; Sons, Ltd.</p>
10aLTE10aMBSFN10aMCS1 aBouras, Christos1 aAlexiou, Antonios1 aPapazois, Andreas1 aKokkinos, Vasileios1 aTsichritzis, George  uhttp://telematics.upatras.gr/telematics/publications/modulation-and-coding-scheme-selection-multimedia-broadcast-over-single-frequency-network-enabled01695nas a2200205   4500008004100000245007000041210006900111260002000180520102200200653000801222653000901230653001001239653000801249100002101257700002201278700002201300700002401322700002401346856011901370       2010                        eng d00aEfficient MCS Selection for MBSFN Transmissions over LTE Networks0 aEfficient MCS Selection for MBSFN Transmissions over LTE Network  cOctober 20 - 223 aLong 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.10aLTE10aMBMS10aMBSFN10aMCS1 aBouras, Christos1 aAlexiou, Antonios1 aPapazois, Andreas1 aKokkinos, Vasileios1 aTsichritzis, George  uhttp://telematics.upatras.gr/telematics/publications/efficient-mcs-selection-mbsfn-transmissions-over-lte-networks01664nas a2200217   4500008004100000245006600041210006500107260002000172300001500192520097500207653000801182653000901190653001001199653000801209100002101217700002201238700002201260700002401282700002401306856011601330       2010                        eng d00aSpectral Efficiency Performance of MBSFN-enabled LTE Networks0 aSpectral Efficiency Performance of MBSFNenabled LTE Networks  cOctober 11 - 13  a 361 - 3673 aLong Term Evolution (LTE) constitutes the latest step
before the 4th generation (4G) of radio technologies designed to
increase the capacity and speed of mobile communications. 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. This enables over-the-air
combining, thus improving the Signal to Interference plus Noise
Ratio (SINR) and spectral efficiency (SE) significantly compared
to conventional MBMS operation. In this paper, we analytically
calculate the SE performance achieved in a MBSFN area for a
dynamically changing user topology and different modulation
and coding schemes (MCS). Finally, based on the SE
measurement, we determine the MCS scheme that either
maximizes or achieves a target SE for the corresponding user
distribution.10aLTE10aMBMS10aMBSFN10aMCS1 aBouras, Christos1 aAlexiou, Antonios1 aPapazois, Andreas1 aKokkinos, Vasileios1 aTsichritzis, George  uhttp://telematics.upatras.gr/telematics/publications/spectral-efficiency-performance-mbsfn-enabled-lte-networks