01875nas a2200193   4500008004100000245006600041210006600107260002000173300001500193520122000208653000901428653001801437653000901455100002101464700002201485700002401507700002201531856012801553       2007                        eng d00aPower Efficient Radio Bearer Selection in MBMS Multicast Mode0 aPower Efficient Radio Bearer Selection in MBMS Multicast Mode  c22 - 26 October  a 261 - 2683 aMultimedia Broadcast Multicast Services (MBMS) was
introduced in Third Generation Partnership Project (3GPP)
Release 6 in order to address the need for the efficient usage of
the expensive radio resources. The goal of this effort is to support
downlink streaming and download-and-play type services to large
groups of users. From the radio perspective, MBMS includes
point-to-point (PtP) and point-to-multipoint (PtM) modes. The
fact that Node B?s transmission power is a limited resource and
must be shared among all MBMS users in a cell indicates the need
for power control during an MBMS service. Consequently, the
analysis of the transmitted power plays a fundamental role in the
planning and optimization process of Universal Mobile
Telecommunications System (UMTS) radio access networks. In
this paper we investigate the factors that affect the Node B?s
transmission power levels during an MBMS session, such as, cell
deployment, propagation models, users? distributions and
mobility issues. To this direction, the transport channels in the
downlink, currently existing in UMTS which could be used to
transmit the multicast data over the UMTS Terrestrial Radio-
Access Network (UTRAN) interfaces are examined.10aMBMS10aPower Control10aUMTS1 aBouras, Christos1 aAlexiou, Antonios1 aKokkinos, Vasileios1 aRekkas, Evangelos  uhttp://telematics.upatras.gr/telematics/publications/power-efficient-radio-bearer-selection-mbms-multicast-mode?language=en