Rolling out a radical shift in test automation through a multi-release project management approach

  • Ck S.
  • Kumar P B.

This paper examines a multi-release program management approach to bring in a radical shift in test automation strategy for a telecom project. The existing test automation using GUI automation tools was found inadequate and as regression test effort was increasing, the team came up with an in-house framework to GUI ...

Multiuser Precoding in Massive MIMO Systems: From a Precoding Granularity Perspective

  • Wu K.

We discuss the impact of downlink (DL) multiuser precoding granularities (in the frequency domain) on massive multiple-input-multiple-output (MIMO) systems. In practice, multiuser precoding is performed on a per block basis, i.e., all subcarriers in one block use the same precoding matrix calculated from the average channel state information (CSI) of ...

Legacy voice to IMS: an MSO roadmap

  • Joseph J.

MSOs can modernize their voice networks with IMS-based solutions as shown in this practical roadmap.

High symbol rate coherent transmission systems for data rates above 400 Gb/s

  • Adamiecki A.
  • Randel S.
  • Raybon G.
  • Winzer P.

We review recent experimental coherent transmission systems for bit rates from 400 Gb/s to 1.2 Tb/s, using high-speed electronic multiplexing to symbol rates from 72 GBd to 107 GBd.

A Detachable 2-DOF Resonator for Electromagnetic Energy Harvesting Systems

  • Blokhina E.
  • Feely O.
  • Frizzell R.
  • Fu B.
  • O’Connell D.

In this work, a novel resonator model consisted of two detachable masses with Coulomb damping has been developed. Fitting analysis between simulation results and experimental data shows that the proposed model exhibits better performance compared to the conventional mass-spring model with only viscous dampers. The energy harvesting system using the ...

Location K-Anonymity under a Streaming Model

  • Andrews D.
  • Wilfong G.
  • Zhang Y.

In this paper we study how to achieve location anonymization under a streaming model. K-anonymity is a popular notion of privacy for which every recorded data point is identical to at least $k-1$ other data points. For location based data, k-anonymity refers to recording a coarse region that contains at ...

A multiple DOF velocity-amplified VEH: Modeling and Characterization

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

A macroscopic two degree-of-freedom (2Dof) nonlinear energy harvester, which employs velocity amplification to enhance the power scavenged from ambient vibrations, is presented. Velocity amplification is achieved through sequential collisions between free-moving masses, and the final velocity is proportional to the mass ratio and the number of masses. Electromagnetic induction is ...

Characterization and optimization of a 2DOF velocity amplified EM EH

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

A two degree of freedom velocity amplified electromagnetic energy harvester has been taken in consideration. The structure is constituted by a little mass which is responsible of the electromagnetic conversion, and an outer bigger mass, for the velocity amplification. The aim of the work has been to characterize both the ...

A multiple degree-of-freedom velocity amplified vibrational energy harvester: experimental analysis and modelling

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

A macroscopic two degree-of-freedom (2Dof) nonlinear energy harvester, which employs velocity amplification to enhance the power scavenged from ambient vibrations, is presented. Velocity amplification is achieved through sequential collisions between free-moving masses, and the final velocity is proportional to the mass ratio and the number of masses. Electromagnetic induction is ...

On-Demand State Migration Protocol for Elastic IMS Cloud Components

  • Cucinotta T.
  • Hilt V.
  • Jul E.
  • Meroni A.
  • Sala A.

In the context of Network Functions Virtualisation one of the key feature we have to deal with is elasticity, namely the capability of a Virtualised Network Function to be designed so as to work in dynamic clusters. Usually, to balance the incoming load, a load-balancer is put in front of ...

A 5.75-Vpp 100-Gb/s InP-DHBT-based differential 2:1-selector-driver module for 100-GBd optical communication systems

  • Berdaguer P.
  • Dupuy J.
  • Duval B.
  • Godin J.
  • Jorge F.
  • Konczykowska A.
  • Nodjiadjim V.
  • Riet M.

A 2:1-selector-driver module with a record differential output amplitude of 5.75 Vpp at 100 Gb/s is reported. It implements a monolithically integrated differential-distributed-amplifier-based driver with a 2:1-selector input stage, realised in a 0.7-µm indium phosphide (InP) double hetero-junction bipolar transistor (DHBT) technology. Broadband input and output transmission lines have been ...

A new generation of wireless transmission technology packet based

  • Chen B.

Packet of the whole communication network has be a trend which cannot be stopped. On the one hand, in the transmission network based on TDM MSTP equipment has been replaced by PTN/IPRAN equipment based on packet technology. On the other hand, with the full deployment of LTE mobile networks, the ...

RF system in packaging (SIP) technologies and its applications in modern micro base stations

  • Chen M.
  • Huo J.
  • Ma Y.
  • Yuan Y.
  • Zhang H.
  • Zhou S.

This paper focused on design single chip of modern micro base station RF front end (included ADCs and DACs) using the system in package (SIP) technology, the chip has features of full band coverage of one receiver, one feedback channel, and one transmitter integrated, which is integrated in two layer ...

Cloud-based platform for applications and data separation network management system

  • Huang S.
  • Wang O.
  • Xu S.

Considering the communication network with the characteristics of multiple network elements and large data configuration complexity, the network management system should meet FCAPS (fault, configuration, accounting, performance and security) request from carrier-class equipment based on these characteristics. In this paper, based on the cloud platform, the communication network management system ...

A MULTIPLE DEGREE-OF-FREEDOM VELOCITY-AMPLIFIED VIBRATIONAL ENERGY HARVESTER PART B: MODELLING

  • Declan O'Donoghue
  • Frizzell R.
  • Jeff Punch
  • Kelly G.
  • Valeria Nico

Vibrational energy harvesting has become relevant as a power source for the reduced power requirement of electronics used in wireless sensor networks (WSNs). Vibrational energy harvesters (VEHs) are devices that can convert ambient kinetic energy into electrical energy using three principal transduction mechanisms: piezoelectric, electromagnetic and electrostatic. In this paper, ...

A MULTIPLE-DEGREE-OF-FREEDOM VELOCITY-AMPLIFIED VIBRATIONAL ENERGY HARVESTER: PART A, EXPERIMENTAL ANALYSIS

  • Frizzell R.
  • Kelly G.

Vibrational energy harvesters (VEHs) are devices which convert ambient vibrational energy into electrical power, offering an alternative to batteries for powering wireless sensors. Detailed experimental characterisation of a 2-degree-of-freedom (2-dof) VEH is presented in Part A of this paper, while a theoretical analysis is completed in Part B. This design ...

Software-Defined Networks with Satellite Controllers

  • Gebhard U.

Control architectures for Software-Defined Networks are characterized by moving previously distributed network state and control functions to a centralized controller instance, leaving network nodes as simple forwarding elements. While functions like path calculation are expected to benefit from the global network view, maintaining detailed network state far from the corresponding ...

An inexpensive multi-channel AC heater control system

  • Dorthe L.
  • Kolodner P.

A commonly-encountered problem in the experimental modeling of thermal-management solutions is the need to independently power many sources of heat. A typical telecomm circuit pack, for example, may contain a dozen or more ICs or optical components, and we would like to test cooling solutions by replacing each IC with ...

Nonlinear Dynamics and Bifurcation Behavior of a 2-DOF Spring Resonator with End Stopper for Energy Harvesting

  • A. El Aroudi
  • B. Fu
  • D. O’Connell
  • E. Alarcon
  • E. Blokhina
  • Frizzell R.
  • O. Feely

In this paper, the model of a two-degree-of-freedom (2-DOF) spring resonator with end stopper for an energy harvesting application is presented. Then we characterize its nonlinear dynamical behavior by numerical simulations when some suitable parameters are varied. The system is formed by two resonators subject to external vibrational excitation and ...

Piecewise Modelled Impact Resonator for Energy Harvesting Systems

  • Boyang Fu
  • Diarmuid O'Connell
  • Frizzell R.

In this work, a novel resonator model with Coulomb damping has been developed. Fitting analysis between simulation results and experimental data shows that the proposed model exhibits better performance compared to the conventional mass-spring with a simple viscous damper model. The piecewise characteristics existing in the proposed model also show ...