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Hybrid Unicast-Broadcast Networks for Linear & Non-linear TV Services 20.06.2017 | 17:00 Uhr - 18:00 Uhr

The increasing popularity of linear services such as mobile TV, broadcasting live and sports events to mobile and portable devices, has led to a dramatic growth of the mobile data traffic. Indeed, according to the Visual Networking Index (VNI) report published by Cisco, the reason of this growth is related to the consumption of video content. These video contents are often consumed immediately, either as a linear service (live TV) or as a non-linear service (time-shifted or on demand), by many users on different devices (tablets, smartphones, laptops, etc.) connected to a cellular network. In cellular networks, these types of services are usually delivered over unicast connections, i.e. as many times as the number of users. This strategy is likely to lead to critical situations, e.g. network congestion at the expense of the quality of service. Thus, to deal with this mobile data traffic explosion and the lack of frequency bands, operators need to densify their radio access network infrastructure (RAN) and deploy heterogeneous access networks using multiple technologies (WiFi / small cell (3G / 4G)), that enable data offloading. One of the major issues of such solutions is the proximity and coexistence of many base stations, the management of the interference they generate on each other’s cell, handovers, etc. However, recent studies have shown, from a technical and economical perspective, that a broadcast transmission mode from an existing or hybrid broadcast infrastructure is more appropriate to deliver highly demanded services. Nevertheless, the unicast transmission mode remains relevant for the delivery of individualized and on demand content. Actually, a promising strategy is to enable network cooperation between existing broadcast and unicast networks in order to benefit from various types of technologies and network infrastructures. In this context, this presentation will focus on the modelling and optimization of a hybrid network, where a unicast network (LTE


Dr. Pape-Abdoulaye Fam, Institut de Recherche Technologique (IRT) b-com, Rennes, Frankreich

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