Papadogiannis A.,Chalmers University of Technology |
Farber M.,Nokia Inc. |
Saadani A.,Orange S.A. |
Nisar M.D.,Nomor Research |
And 8 more authors.
IEEE Vehicular Technology Magazine | Year: 2014
Relay nodes (RNs) will be a key feature of future wireless networks. RNs can extend coverage, increase network capacity, and provide more uniform quality-of-service (QoS) across the cell area in a cost-effective manner. Therefore, not surprisingly, relaying techniques have attracted a significant amount of attention from the wireless industry and standards. The Third-Generation Partnership Project (3GPP) release 10 has considered RNs that act as base stations (BSs), known as type-1 RNs, aiming only for coverage extension. However, RNs can be employed in different ways, and several challenges have to be addressed to attain the theoretical gains. This article presents an overview of the relaying concepts related to the 3GPP long-term evolution (LTE) road map, i.e., concepts related to type-1, type-2, and moving RNs. The implementation challenges are outlined, and a number of promising solutions for each RN type are discussed. More specifically, for type-1 RNs, this article focuses on the allocation of resources to the backhaul and access links. For type-2 RNs, the focus is on designing distributed hybrid automatic repeat request (HARQ) protocols that involve RNs. Moving RNs are presented as an efficient solution to the ever-growing demand for wireless broadband by vehicleborne users. Overall, the presented relaying concepts and solutions can significantly improve the user experience and can play an important role in the future. © 2005-2012 IEEE.
News Article | February 27, 2017
The 5G NORMA project, a part of the 5G Infrastructure Public Private Partnership, 5GPPP initiative is working to define flexible architectures to address the multiservice requirements of 5G. The key innovations involve adaptive decomposition and allocation of network functions based on network slice attributes. This enables service providers to optimize the network with best use of CapEx and OpEx constraints. A network slice or instance is a collection of network function instances including their required resources necessary to operate an end-to-end logical mobile network. Azcom Technology is a partner of the 5G NORMA consortium and will be showcasing a 5G demonstrator at the Mobile World Congress to be held in Barcelona, Spain between Feb 27th and Mar 2nd, 2017. The demo illustrates ability to adaptively re-configure network function instances based on traffic type (e.g., 4K HD Video, data, digital voice etc.) that optimizes overall end-to-end performance. "Network slice re-configurations enable service providers to offer new and improved 5G services and end-users to have best quality of experience," said Dr. Satish Ananthaiyer, EVP, Business Development, Azcom Technology. The key elements illustrating this novel concept include a complete LTE RAN system (eNodeB and EPC) provided by Azcom Technology and the network element known as Software Defined Mobile Network Controller (SDMC), provided by Nomor Research. The SDMC adaptively configures and controls the eNodeB. The Azcom eNodeB implements the 5G South Bound Interface that monitors resources shared among network slices. The SDMC controls both the fast and slow schedulers on the eNB providing appropriate network slice reconfiguration inputs with a goal to optimize spectrum usage and improve end user QoS/QoE. This 5G demonstration is being showcased at the Azcom booth located in Hall 7 Stand G21. For meeting requests, please send email to Azcom Technology, a leader in wireless communications with two decades of experience, provides a complete suite of software/hardware products with customization and design services to build LTE/HSPA+ wireless networks for tactical, public safety, mission critical, IoT and 5G applications. To address the evolving IoT market, Azcom is collaborating with many industry leading players to develop NB-IoT PHY/stack both for the network and the device. Azcom provides LTE traffic generator and testing solutions for NB-IoT and eMTC applications. In the automotive and avionics sectors, Azcom is working with several companies to build connectivity solutions and cloud based applications for data processing/storage. Azcom is headquartered in Milan, Italy with a design center in Gurgaon, India. For more information, please visit http://www.azcom.it For further information, please contact: Claudio Canosi Business Development Manager email@example.com +39-02-82-45-0325
Stockhammer T.,Nomor Research |
2012 IEEE Visual Communications and Image Processing, VCIP 2012 | Year: 2012
This paper provides an overview on the challenges of mobile video streaming focusing on overload situations, variable bandwidth and power consumption issues. Dynamic Adaptive Streaming over HTTP (DASH) is introduced as an enabler to address a significant portion of these challenges. The applicability of the formats to 3G and 4G unicast distribution is provided. Also the applicability of DASH formats for multicast distribution in MBMS is shown. Finally, the usage of DASH in hybrid unicast/multicast is introduced to provide a flexible extension to support different business and delivery models. An outlook to ongoing and future work is provided. © 2012 IEEE.
Breiling M.,Fraunhofer Institute for Integrated Circuits |
Zia W.,Nomor Research |
De La Fuente Y.S.,Heinrich Hertz Institute |
Mignone V.,RAI Radiotelevisione Italiana |
And 3 more authors.
2014 7th Advanced Satellite Multimedia Systems Conference and the 13th Signal Processing for Space Communications Workshop, ASMS/SPSC 2014 | Year: 2014
This paper considers satellite backhauling of eNodeBs aboard vehicles like trains, planes, (cruise) ships and coaches. Current LTE releases do not envisage backhauling of such moving eNodeBs. A Medium Earth Orbit (MEO) satellite configuration like the O3b system and link budgets for the four mentioned vehicles are assumed for the considered scenario. The most promising potential network architecture is analysed by considering several use cases and thus identifying open issues. These issues are examined by analysis and simulation, where the employed real-time simulator implements both the LTE core network, base stations and UEs as well as video codecs on the application layer and a two-way DVB-S2/ACM satellite link emulator. © 2014 IEEE.
Stockhammer T.,Nomor Research |
Heiles J.,Nokia Inc. |
Luken J.,Nokia Inc.
Multimedia Tools and Applications | Year: 2011
IPTV services have been widely deployed by network operators around the world over the last years. However, real-time streaming of Linear TV and Video-on- Demand (VoD) offerings, especially in High Definition quality, still puts a high burden on the network and content servers concerning bandwidth, Quality-of-Service, processing performance and scalability if 100.000s of users have to be supported simultaneously. While multicast delivery can cope with some of these problems for Linear TV services, the unicast VoD services cannot take advantage of that and especially the request for ondemand content is expected to substantially grow in the future. With the introduction of Content Download Services (CDSs), operators have the option to provide IPTV services in innovative ways: They can provide high-quality video services to users with limited access bandwidth, offload the streaming request for blockbuster movies at peak times from the VoD servers or provided personalized advertisements for insertion into a live program event in advance to the users end device. The Digital Video Broadcast (DVB) Project has recently finalized its CDS specification within its IPTV specification efforts. DVB CDS supports push and pull delivery models with unicast, multicast and peer-to-peer distribution in order to enable various business models and use cases. In this work we introduce the specified technology and map it to example use cases and business models. © 2010 Springer Science+Business Media, LLC.
Berger S.,TU Dresden |
Danneberg M.,TU Dresden |
Zanier P.,Nokia Inc. |
Viering I.,Nomor Research |
Fettweis G.,TU Dresden
Eurasip Journal on Wireless Communications and Networking | Year: 2015
Despite the orthogonality of LTE’s uplink transmission, it can happen that signals which are received at the base station with low power are drown out by strong signals from other users. Reason is the limited quantization resolution of the base station’s analog-to-digital converter. Since this effect causes a quality of service degradation for users at the cell edge, the dynamic receive power range of uplink signals arriving at the base station should be upper limited. However, setting an adequate upper limit for the dynamic receive power range is not trivial since many effects, such as quantization noise, fast fading etc., decrease the dynamic range which the analog-to-digital converter can handle in theory. In this paper, we measure the maximal uplink dynamic receive power range, denoted as uplink dynamic range threshold, for our LTE-like measurement setup by monitoring the uplink bit-error-rate of a first user while decreasing its transmit power during the presence of a second adjacently scheduled user with fixed transmit power. As the measured threshold is 31.4±7.6 dB, we can conclude that a link-budget-based estimation of the dynamic receive power range, which has been published previously, is accurate since its result coincides with the measurement. © 2015, Berger et al.
Panzner B.,Nokia Inc. |
Pauli V.,Nomor Research |
Yu L.,Nomor Research |
Viering I.,Nomor Research
Proceedings of the International Symposium on Wireless Communication Systems | Year: 2015
Due to the availability of large contiguous bands in excess of several gigahertz in the millimeter wave spectrum, millimeter wave communications will play a key role in 5G - The next generation mobile networks. The applicability of simple air interfaces without the need for complex techniques for optimized spectrum utilization make mmW carrier frequencies a preferred solution to cope with the huge traffic demand. The smaller wavelength enables usage of large antenna arrays supporting strong beamforming gains that compensate for the higher path loss at mmW frequencies and thus allow for a deployment of cellular access networks in dense urban outdoor scenarios. This work focuses on a real-time software demo of a 5G mmW network in a Chicago model operating at 73GHz. The propagation effects and implemented channel model is based on measurements performed at 73GHz. The 5G demo illustrates the dynamic cell re-routing caused by terminal and scatterer mobility in a 3D view of the dense urban street scenario and computes all relevant key performance indicators derived using a detailed RRM model. The key feature of this 5G mmW demo is the modeling of inband wireless backhaul techniques to foster realistic deployments of mmW access nodes including inexpensive wireless backhaul links to the egress point(s) within the same band. © 2015 IEEE.
Gozalvez D.,Polytechnic University of Valencia |
Pauli V.,Nomor Research |
Moon S.,LG Corp |
Ko W.-S.,LG Corp
IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, BMSB 2011 - Conference Programme | Year: 2011
This paper investigates the utilization of subcarrier diversity (SD) in modern broadcasting systems to achieve transmit diversity. SD takes advantage of orthogonal frequency-division multiplexing (OFDM) and robust forward error correction (FEC) to exploit the space diversity of multiple transmit antennas. In particular, we focus on a variant of SD that we call transmit antenna switching (TxAS) in which each antenna transmits only in one contiguous portion of the spectrum. This way, it is possible to achieve a higher diversity than single transmit antenna configurations with no significant increase in terms of complexity or pilot density. As a result, the utilization of TxAS can outperform more complex space-frequency block codes (SFBC) like Alamouti if the transmission of pilots is taken into account. We evaluate the performance of the proposed technique by means of physical layer simulations in the context of DVB-NGH (Digital Video Broadcasting - Next Generation Handheld), the future broadcasting DVB system for the provision of mobile services to handheld devices. © 2011 IEEE.
Perez E.,Nokia Inc. |
Friederichs K.-J.,Nokia Inc. |
Lobinger A.,Nokia Inc. |
Wegmann B.,Nokia Inc. |
Viering I.,Nomor Research
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST | Year: 2016
The increasing traffic demand will require additional spectrum to be used for mobile broadband. Licensed Shared Access (LSA) is one option for mobile network operators (MNO) to provide access to spectrum resources of other radio services, which are underutilized for specific time intervals and location areas, ensuring interference free coexistence between the sharing partners, i.e. this utilization of the spectrum requires decoupling of the resources in spatial or time domain. Indoor small cell deployments are particularly interesting for such a sharing scenario, due to the additional attenuation from the walls providing additional decoupling of the two systems. This article analyzes the network planning feasibility for LSA spectrum usage in indoor small cell scenarios. On basis of real indoor-to-outdoor propagation measurements and existing propagation models, a minimum decoupling range is determined where the LSA signal penetrating to the outdoor area falls below a certain threshold that guarantees interference free operation of the incumbent. © ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2016.