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To meet the increasing capacity demands of future mobile networks, dense deployment of radio access nodes in combination with partly centralized processing by means of a cloud-based architecture is a promising option. In such an architecture, the design and optimization of the backhaul plays a crucial role. In this paper, we review different backhaul technologies available and discuss their characteristics...
The actual internet traffic growth is challenging the sustainability of mobile networks, therefore, the energy efficiency of the mobile communication infrastructure becomes a topic of particular relevance. Decreasing CO2 emissions and energy demands while expanding the mobile infrastructure to satisfy traffic demands is essential. In this paper the energy efficient use of beamforming techniques and...
The goal of the European ICT Project EARTH is to enhance energy efficiency of current LTE cellular networks by 50 percent, enabling operators to provide more extensive coverage, namely to less densely populated areas, while ensuring high levels of efficiency, hence, reducing the carbon footprint. In order to achieve this objective, different strategies, at different levels, are being addressed. Energy...
The main drivers in the design of current radio access networks have been so far coverage and capacity to provide service and a related good quality, but new directions are emerging with growing relevance, both for existing and future networks. Among them energy efficiency is the most relevant and challenging at the same time and innovative networks, besides providing a good quality of service, shall...
Enabling radio innovation techniques for IMT-Advanced and beyond investigated in the WINNER+ project are summarized in this paper. These techniques survey five innovation areas: Advanced Antenna Systems (AAS), Advanced Radio Resource Management (ARRM), Network Coding, Coordinated Multipoint (CoMP) transmissions and Spectrum Technologies. In AAS, under the framework of cellular multiuser MIMO systems,...
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