Multiflow Application for WDM Networks with Multicarrier Transponders serving SuperChannels in Contentionless OXCs

  • Zami T.

A lot of attention from research teams has been paid to telecommunication elastic photonic networks since 2009, mainly by assessing the related extra network capacity or the mitigation of wavelength contention along the optical fibers. Now that more flexible spectral selective switches and significantly modulation agile transponders are generally available ...

Enhancing Mobile Networks with Software Defined Networking and Cloud Computing

  • Cao Z.
  • Kodialam M.
  • Lakshman T.
  • Panwar S.

In the past decade, mobile devices and applications have experienced an explosive growth, and users are expecting higher data rates and better quality services every year. In this paper, we propose several ideas to increase wireless network functionality and capacity using software-defined networking and cloud computing. Connections in mobile networks ...

Challenges and Opportunities for Thermal Management of Information and Communications Technologies (ICT) Equipment: A Telecommunications Perspective

  • Salamon T.

This paper discusses challenges and opportunities for thermal management of Information and Communication Technology (ICT) equipment, with a particular focus on telecommunications equipment. The paper identifies the key drivers for network traffic growth and how these increasing traffic demands are driving innovations in telecommunications, requiring the development of new and ...

Aerodynamic Performance of a Vibrating Piezoelectric Blade under Varied Operational and Confinement States

  • Jeffers N.
  • Stafford J.

This paper investigates the aerodynamic performance of a piezoelectrically actuated cantilever blade operating in the first mode of vibration. Bulk air moving capability and local velocity field features have been experimentally measured for different operational conditions and blade confinement states. A testing facility has been developed to determine the pressure- ...

Performance Evaluation of Self Backhauled Small Cell Networks

  • Andrews D.
  • Ghosh A.
  • Pupala R.
  • Vasudevan S.

We compare the performance of HetNets with Self Backhauled Small Cells (SBSCs) relative to those with Wired Backhaul based Small Cells (WBSCs). The comparisons are made for a variety of SBSC based HetNets (1) when the HetNets employ Omni antennas at the SBSCs and Uniform PF at the Macro, (ii) ...

Overlapped Sub-Array based Hybrid Beamforming for Millimeter Wave Multi-User Massive MIMO

  • Song N.
  • Sun H.
  • Yang T.

For massive Multiple Input Multiple Output (MIMO) systems at Millimeter Wave (mmWave) bands, we consider an efficient hybrid array architecture, namely Overlapped Sub-Array (OSA), and develop a Unified Low Rank Sparse recovery algorithm (ULoRaS) for hybrid beamforming in downlink multi-user scenarios. The ULoRaS scheme takes advantage of the transmit-receive coordinated ...

Exponentially Weighted Particle Filter for Simultaneous Localization and Mapping Based on Magnetic Field Measurements

  • Dong Y.
  • Liu F.
  • Wang X.
  • Xu X.
  • Zhang C.

This paper presents a simultaneous localization and mapping (SLAM) method that utilizes the measurement of ambient magnetic fields present in all indoor environments. In this paper, an improved exponentially weighted particle filter was proposed to estimate the pose distribution of the object and a Kriging interpolation method was introduced to ...

Differential Microring Modulators for Intensity and Phase Modulation for Optical Interconnects

  • Chang C.
  • De Valicourt G.
  • Dong P.
  • Sethumadhavan C.

We demonstrate a new concept of push-pull silicon microring modulator. Differential drive of two microring modulators nested in a Mach-Zehnder interferometer offers several advantages compared to conventional Mach-Zehnder modulators and single microring modulators for both intensity modulation and phase modulation. We experimentally demonstrate a low-chirp, low drive voltage and large ...

Gbps User Rates Using mmWave Relayed Backhaul with High Gain Antennas

  • Chizhik D.
  • Du J.
  • Onaran E.
  • Valenzuela R.
  • Venkatesan S.

Relay aided backhaul has been proposed to meet the challenge of providing Gbps high user rate over long distance (~1 km) in millimeter Wave. Terminals are served by local APs, which are then backhauled through wireless connections to a wired hub. The problem of backhaul topology design and optimal bandwidth-power ...

A survey on wireless transmitter localization using signal strength measurements

  • Dashti M.
  • Nurminen H.
  • Robert Piche

Knowledge of deployed transmitters' (Tx) locations in a wireless network improves many aspects of network management. Operators and building administrators are interested in locating unknown Txs for optimizing new Tx placement, detecting and removing unauthorized Txs, selecting the nearest Tx to offload traffic onto it, and constructing radio maps for ...

A mathematical model of demand-supply dynamics with collectability and saturation factors

  • Li C.
  • Yang H.

We introduce a mathematical model on the dynamics of demand and supply, incorporating collectability and saturation factors. Our analysis shows that when the fluctuation of the determinants of demand and supply is strong enough, there is chaos in the demand-supply dynamics. Our numerical simulation shows that such a chaos is ...

Fast Edge-preserving Gravity-like Image Interpolation

  • Lukac Z.
  • Ocovaj S.
  • Samardzija D.
  • Temerinac M.

In this paper we propose a novel image interpolation algorithm which preserves edges and keeps a natural texture of interpolated images. The algorithm is based on an idea that only pixels that belong to the same side of an edge should be used in interpolation of pixels that belong to ...

Survey of Photonic Switching Architectures and Technologies in Support of Spatially and Spectrally Flexible Optical Networking {[}Invited]

  • Colbourne P.
  • D'Errico A.
  • Fontaine N.
  • Ikuma Y.
  • Marom D.
  • Proietti R.
  • Rivas-Moscoso J.
  • Tomkos I.
  • Zong L.

As traffic volumes carried by optical networks continue to grow by tens of percent year over year, we are rapidly approaching the capacity limit of the conventional communication band within a single-mode fiber. New measures such as elastic optical networking, spectral extension to multi-bands, and spatial expansion to additional fiber ...

Combining ontological modelling and probabilistic reasoning for network management

  • Apajalahti K.
  • Hyvonen E.
  • Niiranen J.
  • Raisanen V.

Advanced automation is needed in future mobile networks to provide adequate service quality economically and with high reliability. In this paper, a system is presented that takes into account the network context, analyses uncertain information, and infers network configurations by means of probabilistic reasoning. The system introduced in this paper ...

Interference Aware Inter-Cell Rank Coordination for 5G Systems

  • Mahmood N.
  • Mogensen P.
  • Pedersen K.

Multiple transmit and receive antennas can be used to increase the number of independent streams between a transmitter receiver pair, and/or to improve the interference resilience with the help of linear minimum mean squared error (MMSE) receivers. Typically, rank adaptation algorithms aim at balancing the tradeoff between increasing the spatial ...

Multiconnectivity for Mobility Robustness in Standalone 5G Ultra Dense Networks with Intrafrequency Cloud Radio Access

  • Awada A.
  • Fettweis G.
  • Simsek M.
  • Tesema F.
  • Viering I.

Capacity and ultra-reliable communication are some of the requirements for 5th generation (5G) networks. One of the candidate technologies to satisfy capacity requirement is standalone Ultra Dense Network (UDN). However, UDNs are characterized by fast change of received signal strength that creates mobility challenges in terms of increased handovers and ...

Low profile distributed cavity resonators and filters

  • Bulja S.
  • Doumanis E.
  • Gimersky M.

In this paper, a new family of low profile, high quality factor cavity resonators, termed distributed resonators, is introduced. Initially, the theory of operation of the proposed distributed resonator is presented with reference to two, three and four coupled resonators. Based on this, a further-improved arrangement of resonator elements is ...

How Much Spectrum is Too Much in Millimeter Wave Wireless Access

  • Du J.
  • Valenzuela R.

Great increase in wireless access rates might be attainable using the large amount of spectrum available in the millimeter wave (mmWave) band.However, higher propagation losses inherent in these frequencies must be addressed, especially at ranges beyond 100 meters and in non-line-of-sight settings. Otherwise, using wider channels in noise limited settings ...

Operating Massive MIMO in the Unlicensed Band for Enhanced Coexistence and Spatial Reuse

  • Bonfante A.
  • Claussen H.
  • Galati Giordano L.
  • Garcia Rodriguez A.
  • Geraci G.
  • Lopez-Perez D.

We propose to operate massive multiple-input multiple output (MIMO) cellular base stations (BSs) in unlicensed bands. We denote such system as massive MIMO unlicensed (mMIMO-U). We design the key procedures required at a cellular BS to guarantee coexistence with nearby Wi-Fi devices operating in the same band. In particular, spatial ...

An Accurate Field Model Requiring Minimal Map Data for Guiding and Diffusion in Streets and Buildings

  • Chizhik D.
  • Feick R.
  • Rodriguez M.
  • Valenzuela R.

Theory of normal mode propagation in a line-ofsight street scenario is extended to include propagation into buildings through coupling to a diffuse indoor field. Signal strength predictions are in close agreement with measurements, producing 2 dB and 3:5 dB root-mean-square model-data difference, in line-of-sight and outdoor-indoor scenarios, respectively. The full ...