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Dive into the research topics where Jens Bartelt is active.

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Featured researches published by Jens Bartelt.


IEEE Signal Processing Magazine | 2014

Benefits and Impact of Cloud Computing on 5G Signal Processing: Flexible centralization through cloud-RAN

Dirk Wübben; Peter Rost; Jens Bartelt; Massinissa Lalam; Valentin Savin; Matteo Gorgoglione; Armin Dekorsy; Gerhard P. Fettweis

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 and more powerful mobile network implementations. Although centralized baseband pools are already investigated for the radio access network (RAN) to allow for efficient resource usage and advanced multicell algorithms, these technologies still require dedicated hardware and do not offer the same characteristics as cloud-computing platforms, i.e., on-demand provisioning, virtualization, resource pooling, elasticity, service metering, and multitenancy. However, these properties of cloud computing are key enablers for future mobile communication systems characterized by an ultradense deployment of radio access points (RAPs) leading to severe multicell interference in combination with a significant increase of the number of access nodes and huge fluctuations of the rate requirements over time. In this article, we will explore the benefits that cloud computing offers for fifth-generation (5G) mobile networks and investigate the implications on the signal processing algorithms.


IEEE Wireless Communications | 2015

Fronthaul and backhaul requirements of flexibly centralized radio access networks

Jens Bartelt; Peter Rost; Dirk Wübben; Johannes Lessmann; Bruno Melis; Gerhard P. Fettweis

Cloud radio access networks promise considerable benefits compared to decentralized network architectures, but they also put challenging requirements on the fronthaul and backhaul network. Flexible centralization can relax these requirements by adaptively assigning different parts of the processing chain to either the centralized baseband processors or the base stations based on the load situation, user scenario, and availability of fronthaul links. In this article, we provide a comprehensive overview of different functional split options and analyze their specific requirements. We compare these requirements to available fronthaul technologies, and discuss the convergence of fronthaul and backhaul technologies. By evaluating the aggregated fronthaul traffic, we show the benefits of flexible centralization and give guidelines on how to set up the fronthaul network to avoid over- or under-dimensioning.


european conference on networks and communications | 2014

Towards a flexible functional split for cloud-RAN networks

Andreas Maeder; Massissa Lalam; Antonio De Domenico; Emmanouil Pateromichelakis; Dirk Wübben; Jens Bartelt; Richard Fritzsche; Peter Rost

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 functional split between RAN front-ends and centralized equipment. In this paper we analyse constraints and outline applications of flexible RAN centralization.


vehicular technology conference | 2013

Heterogeneous Backhaul for Cloud-Based Mobile Networks

Jens Bartelt; Gerhard P. Fettweis; Dirk Wübben; Mauro Boldi; Bruno Melis

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 for use in cloud-based networks. We point out how a heterogeneous backhaul network and a flexible centralization enables the proposed architecture and give an outlook on how a joint design of access and backhaul can help in meeting the increased demands.


vehicular technology conference | 2013

Joint Bandwidth Allocation and Small Cell Switching in Heterogeneous Networks

Jens Bartelt; Albrecht J. Fehske; Henrik Klessig; Gerhard P. Fettweis; Jens Voigt

One major topic of research into self-organizing network technology is the coordination of SON use cases. Network operators expect a coordinated handling of the parameter and configuration changes submitted to the operating network by closed-loop SON use case implementations. There are currently two basic approaches for SON use case coordination discussed in the literature: A so-called heading or tailing use case external coordination and the combination of separate use cases into one joint algorithm. In this paper, we extend a verified framework to combine mobility load balancing and inter-cell interference coordination use cases, especially for a heterogeneous network environment. Our approach results in a coordinated set of cell range expansion offsets, an efficient bandwidth allocation to support the (enhanced) inter-cell interference coordination use case, and an energy-efficient smart cell switching of the small capacity cells in a heterogeneous networks environment for a varying traffic demand during the course of a day, resulting in significant capacity enhancements while saving energy at the same time.


global communications conference | 2013

Radio-over-Radio: I/Q-stream backhauling for cloud-based networks via millimeter wave links

Jens Bartelt; Gerhard P. Fettweis

Cloud-based centralized processing is one approach to improve mobile networks in terms of capacity, energy consumption, utilization, and cost. However, some joint processing techniques envisioned for such cloud-based networks require the backhauling of received symbols, usually in the form of an I/Q-stream, which requires a drastically higher data rate on the backhaul link than the backhauling of decoded user data. Until recently, the required data rate could only be provided by fiber and not by wireless links, which could be deployed easier and at lower cost. In this paper, we propose the concept of Radio-over-Radio by extending the popular Radio-over-Fiber approach to wireless millimeter wave links. We analyze the characteristics of the new concept and give first results on a joint optimization of the wireless access and backhaul links by means of joint coding under a data rate constraint on the backhaul.


IEEE Communications Magazine | 2017

Wireless-Optical Network Convergence: Enabling the 5G Architecture to Support Operational and End-User Services

Anna Tzanakaki; Markos P. Anastasopoulos; Ignacio Berberana; Dimitris Syrivelis; Paris Flegkas; Thanasis Korakis; Daniel Camps Mur; Ilker Demirkol; Jesus Gutierrez; Eckhard Grass; Qing Wei; Emmanouil Pateromichelakis; Nikola Vucic; Albrecht J. Fehske; Michael Grieger; Michael Eiselt; Jens Bartelt; Gerhard P. Fettweis; George Lyberopoulos; Eleni Theodoropoulou; Dimitra Simeonidou

This article presents a converged 5G network infrastructure and an overarching architecture to jointly support operational network and end-user services, proposed by the EU 5G PPP project 5G-XHaul. The 5G-XHaul infrastructure adopts a common fronthaul/backhaul network solution, deploying a wealth of wireless technologies and a hybrid active/passive optical transport, supporting flexible fronthaul split options. This infrastructure is evaluated through a novel modeling. Numerical results indicate significant energy savings at the expense of increased end-user service delay.


transactions on emerging telecommunications technologies | 2016

5G-XHaul: a converged optical and wireless solution for 5G transport networks

Jesus Gutierrez; Nebojsa Maletic; Daniel Camps-Mur; Eduard Garcia; Ignacio Berberana; Markos P. Anastasopoulos; Anna Tzanakaki; Vaia Kalokidou; Paris Flegkas; Dimitris Syrivelis; Thanasis Korakis; Peter Legg; Dusan Markovic; George Lyberopoulos; Jens Bartelt; Jay Kant Chaudhary; Michael Grieger; Nikola Vucic; Jim Zou; Eckhard Grass

The common European Information and Communications Technology sector vision for 5G is that it should leverage on the strengths of both optical and wireless technologies. In the 5G context, a wide spectra of radio access technologies-such as millimetre wave transmission, massive multiple-input multiple-output and new waveforms-demand for high capacity, highly flexible and convergent transport networks. As the requirements imposed on future 5G networks rise, so do the challenges in the transport network. Hence, 5G-XHaul proposes a converged optical and wireless transport network solution with a unified control plane based on software defined networking. This solution is able to support the flexible backhaul and fronthaul-X-Haul-options required to tackle the future challenges imposed by 5G radio access technologies. 5G-XHaul studies the trade-offs involving fully or partially converged backhaul and fronthaul functions, with the aim of maximising the associated sharing benefits, improving efficiency in resource utilisation and providing measurable benefits in terms of overall cost, scalability and sustainability. Copyright


international conference on communications | 2016

5G infrastructures supporting end-user and operational services: The 5G-XHaul architectural perspective

Anna Tzanakaki; Markos P. Anastasopoulos; Dimitra Simeonidou; Ignacio Berberana; Dimitris Syrivelis; Thanasis Korakis; Paris Flegkas; Daniel Camps Mur; Ilker Demirkol; Jesus Gutierrez; Eckhard Grass; Qing Wei; Emmanouil Pateromichelakis; Albrecht J. Fehske; Michael Grieger; Michael Eiselt; Jens Bartelt; George Lyberopoulos; Eleni Theodoropoulou

We propose an optical-wireless 5G infrastructure offering converged fronthauling/backhauling functions to support both operational and end-user cloud services. A layered architectural structure required to efficiently support these services is shown. The data plane performance of the proposed infrastructure is evaluated in terms of energy consumption and service delay through a novel modelling framework. Our modelling results show that the proposed architecture can offer significant energy savings but there is a clear trade-off between overall energy consumption and service delay.


european conference on networks and communications | 2015

Joint RAN/backhaul optimization in centralized 5G RAN

Emmanouil Pateromichelakis; Andreas Maeder; A. De Domenico; Richard Fritzsche; P. de Kerret; Jens Bartelt

This paper provides an overview of joint radio access network (RAN) and backhaul (BH) optimization methods in dense small cell networks, assuming a heterogeneous backhaul and centralization by Cloud RAN. The main focus is on the design of novel MAC (medium access control) and RRM (radio resource management) schemes for constrained, non-ideal backhaul which can influence the RAN performance. In this context, we provide some key technology approaches which incorporate the RAN/BH awareness at the cloud and exploit the benefits of Cloud-RAN by dynamically adapting to BH constraints.

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Gerhard P. Fettweis

Dresden University of Technology

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Albrecht J. Fehske

Dresden University of Technology

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Eckhard Grass

Humboldt University of Berlin

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Michael Grieger

Dresden University of Technology

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Ilker Demirkol

Polytechnic University of Catalonia

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Jay Kant Chaudhary

Dresden University of Technology

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