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Dive into the research topics where Dirk von Hugo is active.

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Featured researches published by Dirk von Hugo.


Journal of Lightwave Technology | 2014

Energy Efficiency of Load-Adaptively Operated Telecommunication Networks

Christoph Lange; Dirk Kosiankowski; Andreas Betker; Holger Simon; Nico Bayer; Dirk von Hugo; Heiko Lehmann; Andreas Gladisch

Energy consumption and energy efficiency of telecommunication networks are important for network operators regarding both, cost and sustainability aspects. Among several options, load-adaptive network operation-where the provided network capacity is coupled dynamically to the temporally fluctuating traffic characteristics-is a prominent and promising opportunity to improve network energy efficiency. General principles of load-adaptive network operation regimes are presented for a universal broadband operator network and their effects to network energy efficiency are explored. Based on a structure model of a telecommunication network, techniques for adjusting the capacity load-adaptively in different network sections are discussed with respect to the energy-saving potential, the current status and the challenges for application in networks ahead. Operator network sections as well as customer networks are covered; double-digit percentages of energy savings per network section are obtained in load-adaptive operation regimes as compared to the conventional network operation. When applying all those techniques in a holistic view to current realistic large operator networks, the double-digit per-section improvements transform into a significantly lower overall energy saving potential: This is caused by large parts of legacy network equipment forming a base electrical load not amenable to load-adaptive operation. When coupling the power consumption of networks to the temporally and spatially varying traffic demands in load-adaptive regimes their currently very predictable power draw behavior changes and may have significant effects in the interplay with power utilities in the upcoming Smart Energy transformation.


11th International Conference on Cognitive Radio Oriented Wireless Networks, CROWNCOM 2016 | 2016

SDN for 5G mobile networks: NORMA perspective

Bessem Sayadi; Marco Gramaglia; Vasilis Friderikos; Dirk von Hugo; Paul Arnold; Marie-Line Alberi-Morel; Miguel Angel Puente; Vincenzo Sciancalepore; Ignacio Digon; Marcos Rates Crippa

To build a flexible and an adaptable architecture network supporting variety of services and their respective requirements, 5G NORMA introduced a network of functions based architecture breaking the major design principles followed in the current network of entities based architecture. This revolution exploits the advantages of the new technologies like Software-Defined Networking (SDN) and Network Function Virtualization (NFV) in conjunction with the network slicing and multi-tenancy concepts. In this paper we focus on the concept of Software Defined for Mobile Network Control (SDM-C) network: its definition, its role in controlling the intra network slices resources, its specificity to be QoE aware thanks to the QoE/QoS monitoring and modeling component and its complementarity with the orchestration component called SDM-O. To operate multiple network slices on the same infrastructure efficiently through controlling resources and network functions sharing among instantiated network slices, a common entity named SDM-X is introduced. The proposed design brings a set of new capabilities to make the network energy efficient, a feature that is discussed through some use cases.


international conference on communications | 2017

Network slicing with flexible mobility and QoS/QoE support for 5G Networks

Faqir Zarrar Yousaf; Marco Gramaglia; Vasilis Friderikos; Borislava Gajic; Dirk von Hugo; Bessem Sayadi; Vincenzo Sciancalepore; Marcos Rates Crippa

Network slicing is an emerging area of research, featuring a logical arrangement of resources to operate as individual networks, thus allowing for massively customizable service and tenant requirements. The focus of this paper is to present the design of a flexible 5G architecture for network slicing, building on SDN and NFV technologies as enablers. More specifically, we place the emphasis on techniques that provide efficient utilization of substrate resources for network slicing, ultimately optimizing network performance. The key areas of consideration in our architecture revolve around flexible service-tailored mobility, service-aware QoS/QoE control as well as network-wide orchestration.


international conference on communications | 2016

Flexible connectivity and QoE/QoS management for 5G Networks: The 5G NORMA view

Marco Gramaglia; Ignacio Digon; Vasilis Friderikos; Dirk von Hugo; Christian Mannweiler; Miguel Angel Puente; Konstantinos Samdanis; Bessem Sayadi

The goal envisioned by 5G NORMA is to develop a novel, adaptive and future-proof 5G mobile network architecture. In order to fulfill these requirements, 5G NORMA envisions an extremely flexible architecture to be deployed in a multi-tier distributed data-center. In this paper we focus on the novel mobility management schemes, QoE/QoS, Control and Orchestration mechanisms that are being developed in 5G NORMA. These modules, that follow the software-defined principle, jointly optimize core and access functions. The final result is a modular architecture that adapts to the requirements of very heterogeneous services, while allowing multiple tenants to share network resources among them, providing hence the flexible connectivity needed by future 5G Networks.


Photonic Network Communications | 2015

Analysis of the energy consumption in telecom operator networks

Christoph Lange; Dirk Kosiankowski; Dirk von Hugo; Andreas Gladisch

The operation of large-scale telecommunication networks requires energy in different forms. Besides fossil fuels, district heating, and fuels to operate a vehicle fleet, the major energy demand for telecom operator networks is that of electricity. Electricity is needed to power the telecom network itself, the data center equipment, and to supply power to the equipment in offices and workspaces—where the predominant electricity share is consumed by the classic telecom operator network. A large share of this telecom network electricity is currently consumed by legacy network parts inherited from the telephone network era, followed by mobile and fixed access networks with a multitude of distributed active elements for achieving countrywide coverage. Aggregation, core, and optical transport networks only consume modest shares of the overall telecommunication network electricity. The network equipment is accommodated in different classes of network production sites ranging from large indoor central offices to small outdoor sites. The higher their number is, the smaller the respective sites are. Smaller sites essentially provide coverage over large geographical areas and consume only small amounts of electricity per site; however, when combined, their share in total network electricity becomes major. Networking trends are driven by changing user and usage demands and the need to improve the network production efficiency: An example of the former in the wired network is the installation of smaller outdoor network sites to satisfy the increasing user demand for higher bit rate in a value-oriented access network rollout. A prominent example for the latter is the network platform consolidation in the transition toward all-IP networks. Results show that the multitude of small active access network sites for hybrid copper–fiber access systems require increasing amounts of energy for increasing access bit rates—which changes when using the latest copper access technologies or pure fiber-based passive optical access networks. Network platform consolidation improves the network energy efficiency by switching off legacy network platforms and enabling improved degrees of load-adaptive operation.


Computer Communications | 2015

Load-adaptive networking for energy-efficient wireless access

Nico Bayer; Karina Mabell Gomez; Cigdem Sengul; Dirk von Hugo; Sebastian Göndör; Abdulbaki Uzun

Energy-efficient operation is essential for mobile network operators to meet the growing demand for higher data rates while managing rising operating costs. Here, the main challenge is to guarantee the quality of user experience whilst saving energy. This challenge demands adaptive algorithms that enable a load-aware network operation that dynamically configures different network elements according to user needs. To this end, in this paper, we present an adaptive and context-aware power management framework for networks composed of different radio access technologies. We implement and evaluate our framework in an indoor and outdoor testbed. The experimental results confirm that significant energy can be saved in practice by efficiently adapting resources to the actual traffic demand.


vehicular technology conference | 2009

Joint RRM as a Concept for Efficient Operation of Future Radio Networks

Dirk von Hugo; Eckard Bogenfeld; Ingo Gaspard; Jens Gebert; Zhiyong Feng

True integration and common operation and management of different packet based cellular radio networks will be a main characteristic of next generation (4G) mobile radio systems. These features will provide enhanced flexibility for both operators and end users to adapt to changing environments and demands. To reach this goal, however, an efficient usage of resources such as frequency, power, and space has to be realised across the complete communication chain. Within the EU funded project E 3 network self-organization principles are investigated which support automation of Radio Resource Management (RRM) across multiple radio cells, technologies, administrative domains, and services. Important design criterion for such a collaborative cognitive Joint RRM is the improved operational performance to grant technical and economic success of the new mobile platform. Aim of this paper is to describe the current status of conceptual and architectural analysis as well as first results and to outline the proposed elaboration and comparison of different approaches versus requirements mainly from an operator point of view.


European Transactions on Telecommunications | 1998

Fade countermeasures and adaptive resource sharing for an experimental TDMA satellite communications system operating at Ka-Band

Michael Schnell; Dirk von Hugo

Satellite communications systems operating at K a -band suffer from severe rain fading. Thus, in order to achieve an acceptable availability fade countermeasures have to be applied which are efficiently implemented using adaptive resource sharing. In this letter, the results from a measurement campaign during which an experimental time-division multiple-access satellite communications system applying fade countermeasures has been operated at K a -band are reported and discussed. The results show that fade countermeasures can be used efficiently leading to a considerable improvement in performance and/or availability.


international conference on supercomputing | 2017

Distributed Network Infrastructure for Community Services in the Framework of Next Generation Mobile Networks

Dirk von Hugo; Gerald Eichler

The concept of next generation networks as is currently consolidating within research and standards defining organizations foresees beside provision of higher flexibility and adaptability to different services’ requirements also increased resource efficiency to enable affordable access in a sustainable way. To this end, a truly universal access has to be provided integrating multiple wireline, wireless, and cellular technologies to support residential and mobile entities of different size/shape/capability sets as is reflected by the variety of typical 5G use cases. Multiple logically separate networks (slices) shall be operated across the same infrastructure offering a performance and user experience meeting the diverse demand as exact as possible. This could include, beside traditional commercial operator services, a type of best effort connectivity to access e.g. urban community information and support daily life within a future smart city environment. This paper addresses a framework concept to integrate such a usage scenario within a future converged 5G system. Main focus of the reported exemplary results is on the issues of flexible service support (including varying mobility requirements) and efficient use of resources which seem to be most relevant for 5G success from a commercial point of view.


international conference on intelligence in next generation networks | 2011

Broadband wireless service provisioning through a wireless mesh backhaul

Cigdem Sengul; Lars Kollecker; Nico Bayer; Hans Joachim Einsiedler; Dmitry Sivchenko; Dirk von Hugo

This paper describes results achieved within recently successfully completed EU projects CARMEN (CARrier grade MEsh Networks) and PANLABII (PAN European LABoratory for next generation networks and services). The main contribution of the CARMEN project is the design and prototype of a wireless mesh network that allows quality of service provisioning. Currently, CARMEN functionalities are evaluated using a 9-node mesh testbed. However, thanks to the PANLABII project, which develops a federation platform for independent distributed testbeds, now, CARMEN functions can be tested in various network environments and under different traffic conditions. Through such performance evaluation versatility, it becomes possible to prove the scalability and efficiency of mesh technology for providing broadband services.

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Marcos Rates Crippa

Kaiserslautern University of Technology

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