D-SPARQ: Distributed, Scalable and Efficient RDF Query Engine

  • Pascal Hitzler
  • Raghava Mutharaju
  • Sala A.
  • Sherif Sakr

We present D-SPARQ, a distributed RDF query engine that combines the MapReduce processing framework with a NoSQL distributed data store, MongoDB. The performance of processing SPARQL queries mainly depends on the eefficiency of handling the join operations between the RDF triple patterns. Our system features two unique characteristics that enable ...

Devices applications of hybrid 3-5 on Silicon integration

  • Accard A.
  • De Valicourt G.
  • Duan G.
  • Girard N.
  • Kaspar P.
  • Le Liepvre A.
  • Levaufre G.
  • Make D.

Recent progresses on hybrid integration of III-V on Silicon devices using a wafer bonding technique are presented as well as their applications for next generation of access, metropolitan and long haul networks

In-Network Quality Optimization for Adaptive Video Streaming Services

  • Bouten N.
  • De Turck F.
  • Famaey J.
  • Latre S.
  • Van Leekwijck W.


Task Assignment Strategies for Pools of Baseband Computation Units in Future Cellular Networks

  • Grob-Lipski H.
  • Haberland B.
  • Scholz S.
  • Werthmann T.

A popular architecture for cellular mobile networks is to place Remote Radio Heads (RRHs) on the cell towers and connect those via fibers with a centralized pool of baseband Units (BBUs). Among other things, the centralization of baseband computation faciliates multiplexing gains and can thereby save compute resources. To realize ...

Platform for future pervasive telecommunication market

  • Wajda W.

Market evolution poses challenges for future telecommunication network. On the one site pressure on network operators regarding technology investments and decreasing revenue and on the other site changes in customer behavior and perception rise to the quest for re-organization and for new business strategies of the Telco business. This paper ...

Automatic Learning of Anonymization Functions for Graphs and Dynamic Graphs

  • Maag M.

Data privacy is a major problem that has to be considered before releasing datasets to the public or even to a partner company that would compute statistics or make a deep analysis of these data. Privacy is insured by performing data anonymization as required by legislation. In this context, many ...

Nonlinearity of a 2 Degree of Freedom Velocity Amplified Electromagnetic Vibrational Energy Harvester and Optimization of Coil Parameters

  • Boco E.
  • Frizzell R.
  • Kelly G.
  • Nico V.
  • O’Donoghue D.
  • Punch J.

A 2DOF velocity amplified electromagnetic vibrational energy harvester is analyzed. The system consists of two masses oscillating relative to each other in response to external excitation. The large mass is designed with a centrally located cavity in which a second smaller mass is placed. This configuration allows the larger mass ...

Bell Labs 5G UFMC Air Interface Demonstrator

  • Heimpel H.
  • Koppenborg J.
  • Mayer H.
  • Samardzija D.
  • Schaich F.
  • Wild T.

A new waveform approach “Universal Filtered Multi-Carrier” (UFMC), being better suited for 5G has been invented by Bell Labs. Simulation and trials with an 5G UFMC Air Interface demonstrator to show the benefits of this new approach are discussed

3GPP ACLR measurements for Millimeter-Wave Wireless Backhaul Link with Self-Heterodyning Mixing

  • Ferling D.
  • Luz G.
  • Maier S.
  • Pascht A.
  • Schlesinger H.
  • Woerner S.
  • Yu X.

This paper analyzes the signal quality achievable with a novel system architecture for low-power small cell remote units with integrated millimeter-wave wireless backhaul. The data signal on the backhaul link uses the same 3GPP compliant signal as with the access link serving the users. In contrast to existing systems, the ...

How a "Wi-Fi first" strategy benefits EMEA MSOs

  • Davidson S.

Wi-Fi first presents a market opportunity for MSOs. Voice over Wi-Fi enabled devices default to using the cable operator's Wi-Fi network, and in the case of smartphones switch to cellular when out of Wi-Fi range.

Microfluidic Cooling of Photonic Integrated Circuits (PICS)

  • Blythman R.
  • Donnelly B.
  • Ehrlich L.
  • Enright R.
  • Hernon D.
  • Jeffers N.
  • Nolan K.
  • O'Connor J.
  • Punch J.
  • Sexton A.
  • Stafford J.
  • Waddell A.

It is widely believed that the current telecommunications network is required to grow by more than 10X in the coming years to satisfy the demands placed on it by an increasing number of connected devices, in particular content streaming to mobile devices. To enable this growth, significant enhancement in the ...

Bayesian sequential parameter estimation

  • Mai T.
  • Wilson S.

A new approach of sequential parameter learning is proposed for a special general class of state-space model where the state equation is linear with Gaussian noise. In this approach, the filtering density of the state variable and unknown parameters is jointly and iteratively approximated by either Gaussian density or mixture ...

Transport-SDN application to dynamically optimize deployed optical transport networks

  • Dembeck L.
  • Ilchmann F.
  • Leven A.
  • Milbrandt J.

Evolution from todays statically operated wavelength division multiplex (WDM) networks towards future transport software defined networking (T-SDN) controlled flexible networks is in progress, enabling both an easier network set-up as well as network operation. To support this flexible approach autonomous optimization of network resources especially within deployed large WDM networks ...

5G MM-Wave Communications -- Potential & Risks

  • Braun V.

Slideset for German Bell Labs Future X Day, 20-Nov-2014

Real-time implementation of high-speed digital coherent transceivers

  • Pfau T.

The real-time implementation of digital coherent receivers for 100 Gbit/s data rates and beyond pushes the limits of all the technologies involved. Digital-to-analog and analog-to-digital converters with ultra-high sampling rates need to be co-integrated with a large scale digital signal processing (DSP) engine, and highly sophisticated algorithms have to be ...

Insight-Driven IMS Orchestration

  • Hilt V.

Insight-Driven IMS Orchestration Presentation

Blue Cube

  • Maier S.

Energy autonomous wireless small cell enabling simple and cost-effective deployment

Identifying user activity from truncated-URL web traces

  • Ajwani D.
  • Mai T.
  • Sala A.

Understanding user behavior is essential to personalize and enrich a user's online experience. While there are significant benefits to be accrued from the pursuit of personalized services based on a fine-grained behavioral analysis, care must be taken to address user privacy concerns. The ideal data set used for such an ...

5G waveform enabling the support of 100x devices with up to 10x lower latency

  • Koppenborg J.
  • Schaich F.
  • Wild T.

One driver for 5G is the vision to support a multitude of service and device classes. Bell Labs has invented a new waveform and access structure: Universal-Filtered OFDM (UF-OFDM) with an unified frame structure for handling this heterogeneity. This will enable a highly scalable and flexible system with improved spectral ...

Towards secure European telecommunication networks - Celtic-Plus Success Story SASER

  • Lach E.

This is an input for one Success Story related to the SASER Conference in the frame of the project Mid-Term-Review of the Celtic-Plus project SASER. The article will be published in Celtic-Plus News in the EURESCOMmesage by Celtic-Office SASER likely in October. Our input describes the demonstrator of ALcatel-Lucent shown ...