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 ...

A Longitudinal Measurement Study of TCP Performance and Behavior in 3G/4G Networks Over High Speed Rails

  • Li L.
  • Mijumbi R.
  • Peng C.
  • Wang D.
  • Xiao Q.
  • Xu K.
  • Zheng K.

While TCP has been extensively studied in static and low speed mobility situations, it has not yet been well explored in high speed mobility scenarios. Given the increasing deployment of high speed transport systems (such as high speed rails), there is an urgent need to understand the performance and behavior ...

Triple-Mode Ceramic Cavity Filters With Wide Spurious-Free Performance

  • Abbosh A.
  • Hendry D.

A triple-mode silver-plated ceramic cavity filter with wide spurious-free response is presented. It uses single mode ceramic slabs as interfacing resonators with the cube to give wide spurious-free performance up to 4 GHz for an 1800-MHz base station filter. Three square apertures at the slab-cube interface give simple and flexible ...

Will productivity growth return in the new digital era? An analysis of the potential impact on productivity of the fourth industrial revolution

  • Kamat S.
  • Prakash S.
  • Saniee I.
  • Weldon M.

It is increasingly acknowledged that we are on the verge of the next technological revolution and the fourth industrial revolution, driven by the digitization and interconnection of all physical elements and infrastructure, and controlled by advanced intelligent systems. As a result, there will be a new era of automation that ...

An Overview of Practical Software Reliability Prediction

This paper provides an overview of software reliability prediction. A piecewise application of exponential reliability growth models has been proven to precisely capture an entire defect trend from internal test phases to customer site test and operation phases. The last curve can be used to predict key quality metrics such ...

Packet Throughput Analysis of Static and Dynamic TDD in Small Cell Networks

  • Geraci G.
  • Quek T.
  • Yang H.
  • Zhong Y.

We develop an analytical framework for the performance comparison of small cell networks operating under static time division duplexing (S-TDD) and dynamic TDD (D-TDD). While in S-TDD downlink/uplink (DL/UL) cell transmissions are synchronized, in D-TDD each cell dynamically allocates resources to the most demanding direction. By leveraging stochastic geometry and ...

Bi-directional 25G/50G TDM-PON with extended power budget using 25G APD and coherent amplification

  • Houtsma V.
  • Van Veen D.

We demonstrate 50G duobinary PON transmission using a commercial 25G APD-based receiver. To extend the power budget we used simplified coherent amplification achieving −35 dBm sensitivity at 25G, enabling 40 dB optical power budget.

A Survey of Anticipatory Mobile Networking: Context-Based Classification, Prediction Methodologies, and Optimization Techniques

  • Bui N.
  • Cesana M.
  • Hosseini S.
  • Liao Q.
  • Malanchini I.
  • Widmer J.

A growing trend for information technology is to not just react to changes, but anticipate them as much as possible. This paradigm made modern solutions, such as recommendation systems, a ubiquitous presence in today’s digital transactions. Anticipatory networking extends the idea to communication technologies by studying patterns and periodicity in ...

On Multi-Access Edge Computing: A Survey of the Emerging 5G Network Edge Cloud Architecture and Orchestration

  • Dutta S.
  • Flinck H.
  • Mada B.
  • Sabella D.
  • Samdanis K.
  • Taleb T.

Multi-access edge computing (MEC) is an emerging ecosystem, which aims at converging telecommunication and IT services, providing a cloud computing platform at the edge of the radio access network. MEC offers storage and computational resources at the edge, reducing latency for mobile end users and utilizing more efficiently the mobile ...

On Companding and Optimization of OFDM Signals for Mitigating Impulsive Noise in Power-line Communication Systems

  • Bamidele Adebisi
  • Gacanin H.
  • Kelvin Anoh
  • Khaled M. Rabie
  • Mohammad Hammoudeh

Generally, the probability density function (PDF) of orthogonal frequency division multiplexing (OFDM) signal amplitudes follow the Rayleigh distribution, thus, it is difficult to correctly predict the existence of impulsive noise (IN) in powerline communication (PLC) systems. Compressing and expanding the amplitudes of some of these OFDM signals, usually referred to ...