Delay versus Stickiness Violation Trade-offs for Load Balancing in Large-Scale Data Centers

  • Borst S.
  • Liang Q.

Load balancing provides a key mechanism for achieving efficient resource allocation in data centers, ensuring high levels of server utilization and robust application performance. The load balancing techniques implemented in current data centers tend to rely on mapping packets to a server IP address through a hash value calculated from ...

Improving End to End Energy Efficiency in Network Function Virtualization

Network Function Virtualization (NFV) is a new paradigm of virtualizing the services provided by the telecom and cloud operators. NFV is one of the hottest research areas in the field of computer networking. Given one or more service deployed on the virtual machines, the goal is to find a solution ...

Virtualizing Network Services & Cloud Reliability

In a communications network, several physical appliances are used to manage and operate the network. A few examples of these appliances are equipment used as load balancers, firewalls and intrusion detection systems. With the advance of virtualization and cloud computing, these physical appliances are being replaced by virtual servers, in ...

Large-scale Measurement and Analysis of Cloud Service Reliability

Given the growth and our increasing reliance on cloud services, it is crucial that we have a better understanding of the reliability of cloud services. Today, a cloud service is composed of a complex array of building blocks and any of the building blocks can fail. Prior empirical studies on ...

SDN Application Perils: Analytics-Enhanced Automated Verification for Reliability, Performance & Security

  • Jagadeesan L.
  • Mendiratta V.

Software-defined networking (SDN) enables networks to be programmed and dynamically modified through software-based network applications and services. Applications can be deployed into operational SDN networks, replacing middle-boxes, and have tremendous power to impact and potentially compromise network behaviors, significantly affecting network reliability, performance, and security. To protect SDN networks, it ...

Wireless Strategies Beyond WiFi for Fixed Network Service Providers

  • Dhingra V.
  • Glapa M.
  • Krishnan Y.
  • Patil G.

Fixed access network service providers are witnessing increasing competition in their TV and broadband businesses. In response, many MSOs have started offering residential, enterprise and WiFi hotspots as a value-added service and as an enabler for churn reduction. Some MSOs, such as Cablevision, are using their WiFi footprint to launch ...

A digital ecosystem for smart energy - Into a specification-driven data streaming world

  • Roelands M.

These slides, to an invited panel talk at EPIA'17, introduce a horizontal streaming service platform approach based on Bell Labs World Wide Streams, extended with a service specification compiler and world model concept. As per the topic of the session where this is to be presented, the talk applies this ...

A 36.4dB SNDR @ 5GHz 1.25GS/s 7b 3.56mW SAR ADC Using Switch-Bootstrapping, Unit-Switch-Plus-Cap DAC and Triple-Tail Comparator in 28nm Bulk CMOS

  • Ramkaj A.
  • Steyaert M.
  • Strackx M.
  • Tavernier F.

A 1.25GS/s 7b single-channel SAR ADC is presented with an SNDR/SFDR of 41.4dB/51dB at low frequencies, while the SNDR/SFDR at Nyquist are 40.1dB/52dB and are still 36.4dB/50.1dB at 5GHz. The high input frequency linearity is enabled by a fast bootstrap circuit for the input switch, while the high sampling rate, ...

A 7b 1.25GS/s 3.8mW Single-Channel SAR ADC with a Triple-Tail Comparator, Improved T/H and Unit-Switch-Plus-Cap-DAC achieving 36.4dB SNDR at 5GHz Input Frequency

  • Pelgrom Marcel
  • Ramkaj A.
  • Steyaert M.
  • Strackx M.
  • Tavernier F.

To support continuous bandwidth growth of next-generation high-speed serial links, moderate-resolution energy-efficient gigahertz-sampling-rate ADCs are highly demanded. SAR ADCs bare an excellent power-efficiency due to their highly digitized nature, allowing them to scale proficiently into deep-submicron nodes. Several techniques have been presented recently to increase SAR speed such as capacitive ...

IMS shared streaming video

  • Gaglianello R.
  • Liu D.

This paper describes the design, architecture and implementation of an IP Multimedia Subsystem (IMS) shared streaming video (SSV) application that executes within the framework of the Lucent Techologies' 3rd Generation Partnership Project (3GPP) IMS services architecture. IMS being only one of several standards for creating applications, we will use the ...

The development of the wireless intelligent network (WIN) and its relation to the international intelligent network standards

  • Faynberg I.
  • Gabuzda L.
  • Jacobson T.
  • Lu H.

This paper summarizes the current International Telecommunication Union — Telecommunication Standardization Sector (ITU-T) intelligent network (IN) standards in the context of the wireless intelligent network (WIN) and relevant parts of the ANSI-41 family of standards developed in the United States. In addition, this paper outlines the concepts on which the ...

A small experimental code to accompany an accepted paper

  • Ajwani D.
  • Nicholson P.
  • Parthasarathy S.
  • Sala A.
  • Sun J.

This is an experimental code that will accompany our paper, accepted in WebScience Conference. The paper describes techniques to break cycles in graphs that model hierarchical relationships. It is mostly developed by our university collaborator Jiankai Sun.

Optimized Regenerator Placement in Elastic Optical Networks

  • Morea A.
  • Zami T.

This paper illustrates the relevance of specific allocation of flexible opto-electronic regeneration for ultimate spectral efficiency in the core elastic WDM networks: up to 2.5 times more traffic can be transported with sophisticated regeneration strategies versus basic 100Gb/s routing.

Investigations of 5G Multiple Radio Access Technology Performance and Resource Selection Behavior

  • Gebert J.
  • Prof. Dr.-Ing. Shun-Ping Chen

A basic simulation platform is presented in this paper for investigations of 5G Multiple Radio Access Technology (M-RAT) Performance and Resource Allocation Behavior by considering the mixture of new radio network technology aspects and decision criteria.

Distributed Entity Disambiguation with Per-Mention Learning

  • Ajwani D.
  • Mai T.
  • Nicholson P.
  • Sala A.
  • Shi B.

Entity disambiguation, or mapping a phrase to its canonical representation in a knowledge base, is a fundamental step in many natural language processing applications. Existing techniques based on global ranking models fail to capture the individual peculiarities of the words and hence, struggle to meet the accuracy-time requirements of many ...

Hybrid III-V / Silicon Laser with Integrated Silicon Athermal Wavelength Locker

  • Chen Y.
  • De Valicourt G.
  • Dong P.
  • Fontaine N.
  • Kim K.
  • Melikyan A.

Hybrid III-V/silicon laser with integrated athermal wavelength locker is reported. Integrated athermal filter shows athermal operations over $ 40C temperature fluctuations in a frequency bandwidth of 2THz.

Does the Cross-Talk Between Nonlinear Modes Limit the Performance of NFDM Systems?

  • Aref V.
  • Buelow H.
  • Thai Le S.

We show a non-negligible cross-talk between nonlinear modes in Nonlinear Frequency division Multiplexed system when data is modulated over the nonlinear Fourier spectrum and transmitted over a lumped amplified optical link. Considering a generic modulation, we evaluate the performance loss of neglecting the cross-talks.

Improvement of Bandwidth Limitation Tolerance for High-speed PAM-4 Transmission Using Turbo Equalizer

  • Buchali F.
  • Buelow H.
  • Dischler R.
  • Hu Q.
  • Schmalen L.
  • Schuh K.

We beat the bandwidth limitation of low-cost IMDD system achieving high-speed PAM-4 transmission. With information iteratively delivered between equalizer and decoder, a low-complexity turbo equalizer is applied to cancel the inter-symbol interference caused by the hardware bandwidth limitation.

My Favorite Pattern Languages

  • Hanmer R.

A brief introduction to software patterns, pattern languages and five different pattern languages.

Volterra Series Nonlinear Equalizer Accounting for PMD

  • Czegledi C.
  • Dar R.

We propose a modified Volterra series (VS) digital backpropagation algorithm that takes into account polarization-mode dispersion (PMD) effects. The algorithm accounts only for nonlinear products that are PMD-insensitive, leading to both performance enhancement and significant complexity reduction.