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The evolution towards 5G mobile networks will be characterized by an increasing number of wireless devices, an increasing device and service complexity, and the requirement to access mobile services ubiquitously. Two key enablers will allow for realizing the vision of 5G: very dense deployments and centralized processing. This article discusses the(More)
Cloud computing draws significant attention in the information technology (IT) community as it provides ubiquitous on-demand access to a shared pool of configurable computing resources with minimum management effort. It gains also more impact on the communication technology (CT) community and is currently discussed as an enabler for flexible, cost-efficient(More)
In this work, we give an overview of the main challenges that must be tackled to perform a joint design of the backhaul and radio access network in a cloud-based mobile network. The deployment of a very dense network based on small cells connected through a heterogeneous backhaul is a realistic way of achieving a high throughput in a mobile network. But,(More)
Very dense deployments of small cells are one of the key enablers to tackle the ever-growing demand on mobile bandwidth. In such deployments, centralization of RAN functions on cloud resources is envisioned to overcome severe inter-cell interference and to keep costs acceptable. However, RAN back-haul constraints need to be considered when designing the(More)
— In this paper, a framework for the analysis of the transmission-computation-energy tradeoff in wireless and fixed networks is introduced. The analysis of this tradeoff considers both the transmission energy as well as the energy consumed at the receiver to process the received signal. While previous work considers linear decoder complexity, which is only(More)
—In wireless fading channels, multiuser scheduling has the potential to boost the spectral efficiency by exploiting diversity gains. In this regard, proportional fair (PF) scheduling provides a solution for increasing the users' quality of experience by finding a balance between system throughput maximization and user fairness. For this purpose, precise(More)
—In future 5G mobile networks, radio access network functions will be virtualized and implemented on centralized cloud platforms. In principle, this allows for more advanced algorithms of joint processing and offers the ability to balance the computational load. However, the shift of functionality on a cloud-platform also imposes challenges on the design of(More)
Small cell deployment is one of the most promising technology trends to cope with the rising need for very high data rates foreseen in future mobile networks. Nevertheless, it has the side effect of introducing more complex interference scenarios, needing to be properly managed by means of coordination mechanisms. The recently introduced Cloud-RAN(More)