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Steinau an der Strasse, Germany

Soldani D.,Huawei | Soldani D.,University of Surrey | Pentikousis K.,EICT GmbH | Tafazolli R.,Expert Networks | And 3 more authors.
IEEE Communications Magazine | Year: 2014

Tubiquitous ultra-broadband network enabling the future Internet (FI), is not only about new releases of current network generations and services, but, more significantly, will be associated with a true revolution in the information and communications technologies (ICT) field: the network will efficiently and effectively take forward new-fangled services to everyone and everything, such as cognitive objects and cyber physical systems (CPSs). A "full immersive (3D) experience" enriched by "context information" and, in particular, "anything or everything as a service (XaaS)" are the main business drivers for massive adoption and market uptake of the new fundamental enabling technologies, beyond today's "client-server" model, where the network has been reduced to a ubiquitous "pipe of bits." XaaS refers to those services - beyond the current models of software as a service (SaaS), infrastructure as a service (IaaS), and platfore as a service (PaaS), SPI models, of cloud computing - such as data as a service (DaaS), security as a service (again, SaaS), network as a service (NaaS), knowledge as a service (KaaS), machine as a service (MaaS), and robot as a service (RaaS), which could be delivered over the advanced 5G infrastructure, without the need to own hardware, software, or even the cognitive objects themselves. Communication services, such as voice and video telephony, will be enriched and bundled with other services. The network infrastructure is expected to become the "nervous system" of the actual digital society and digital economy. This challenge calls for a complete redesign of services and service capabilities, architectures, interfaces, functions, access and non-access stratum protocols and related procedures, as well as advanced algorithms (e.g., for unified connection, security, mobility and routing management, and reconfiguration of ICT services; and any type of resource of cyber physical systems). The expected transformation will be especially true at the edge, that is, around the end user (or prosumer), where the "intelligence" already started migrating a few years ago, and where massive processing, memory, and storage capacity are gradually accumulating. © 2014, Institute of Electrical and Electronics Engineers. All rights reserved. Source

Schmuck H.,Alcatel - Lucent | Bonk R.,Alcatel - Lucent | Poehlmann W.,Alcatel - Lucent | Haslach C.,Alcatel - Lucent | And 8 more authors.
Optics Express | Year: 2014

An open converged metro-access network approach allows for sharing optical layer resources like fibers and optical spectrum among different services and operators. We demonstrated experimentally the feasibility of such a concept by the simultaneous operation of multiple services showing different modulation formats and multiplexing techniques. Flexible access nodes are implemented including semiconductor optical amplifiers to create a transparent and reconfigurable optical ring network. The impact of cascaded optical amplifiers on the signal quality is studied along the ring. In addition, the influence of high power rival signals in the same waveband and in the same fiber is analyzed. © 2014 Optical Society of America. Source

Fritzsche D.,EICT GmbH | Weis E.,Deutsche Telekom AG | Breuer D.,Deutsche Telekom AG
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

This paper shows the requirements for next generation optical access (NGOA) networks and analyzes the potential of OFDM (orthogonal frequency division multiplexing) for the use in such network scenarios. First, we show the motivation for NGOA systems based on the future requirements on FTTH access systems and list the advantages of OFDM in such scenarios. In the next part, the basics of OFDM and different methods to generate and detect optical OFDM signals are explained and analyzed. At the transmitter side the options include intensity modulation and the more advanced field modulation of the optical OFDM signal. At the receiver there is the choice between direct detection and coherent detection. As the result of this discussion we show our vision of the future use of OFDM in optical access networks. © 2010 COPYRIGHT SPIE - The International Society for Optical Engineering. Source

Sune M.,I2Cat Foundation | Bergesio L.,I2Cat Foundation | Woesner H.,EICT GmbH | Rothe T.,EICT GmbH | And 14 more authors.
Computer Networks | Year: 2014

The growth of the Internet in terms of number of devices, the number of networks associated to each device and the mobility of devices and users makes the operation and management of the Internet network infrastructure a very complex challenge. In order to address this challenge, innovative solutions and ideas must be tested and evaluated in real network environments and not only based on simulations or laboratory setups. OFELIA is an European FP7 project and its main objective is to address the aforementioned challenge by building and operating a multi-layer, multi-technology and geographically distributed Future Internet testbed facility, where the network itself is precisely controlled and programmed by the experimenter using the emerging OpenFlow technology. This paper reports on the work done during the first half of the project, the lessons learned as well as the key advantages of the OFELIA facility for developing and testing new networking ideas. An overview on the challenges that have been faced on the design and implementation of the testbed facility is described, including the OFELIA Control Framework testbed management software. In addition, early operational experience of the facility since it was opened to the general public, providing five different testbeds or islands, is described. © 2014 Elsevier B.V. All rights reserved. Source

Bentz C.M.,TU Dortmund | Fritzsche D.,EICT GmbH | Weis E.,AT&T | Krummrich P.M.,TU Dortmund
Journal of Optical Communications and Networking | Year: 2013

Passive optical network (PON) monitoring with as many as 1024 subscribers encounters difficulties due to high splitting losses and drop fiber differentiation problems. In this work a novel concept for monitoring PONs for fiber to the home (FTTH) access, which is based on concatenated wavelength-selective mirrors, has been investigated in a field trial. At each subscriber a unique mirror combinationis installed. Binomial coefficients guarantee that each mirror combination in a given PON is used only once. The field trial has been performed successfully with a PON consisting of 37 km deployed standard singlemode fiber and up to 1:32 passive optical power splitting causing a total one-way attenuation of at least 30.7 dB. Different subscribers located at equal distances from the optical time domain reflectometry could be distinguished and identified individually. For the measurement setup only low-cost components were used. © 2009-2012 OSA. Source

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