3GPP C-V2X and IEEE 802.11p for Vehicle-to-Vehicle Communications in Highway Platooning Scenarios

  • Bakowski K.
  • David Lister
  • Garcia I.
  • Ilaria Thibault
  • Krzysztof Wesolowski
  • Michal Sybis
  • Patrick Marsch
  • Pawel Sroka
  • Vukadinovic V.
  • Xu H.

The focus of this study is the performance of high-density truck platooning achieved with different wireless technologies for vehicle-to-vehicle (V2V) communications. Platooning brings advantages such as lower fuel consumption and better traffic efficiency, which are maximized when the inter-vehicle spacing can be steadily maintained at a feasible minimum. This can ...

Designing Optimal Middlebox Recovery Schemes with Performance Guarantees

  • Kanizo Y.
  • Rottenstreich O.
  • Segall I.
  • Yallouz J.

Enabling functionality in modern network is achieved through the use of middleboxes. Middleboxes suffer from temporal unavailability due to various reasons, such as hardware faults. We design a backup scheme that takes advantage of Network Function Virtualization (NFV), an emerging paradigm of implementing network functions in software, deployed on commodity ...

Optimizing Operational Costs of NFV Service Chaining

  • Caggiani Luizelli M.
  • Raz D.
  • Saar Y.

Network Function Virtualization (NFV) is a novel paradigm that enables flexible and scalable implementation of network services on cloud infrastructure. One of the key factors in the success of NFV is the ability to dynamically allocate physical resources according to the actual demand. Yet, orchestrating service chains that require high ...

Real world home blood pressure variability in over 56,000 individuals with nearly 17 million measurements

  • Kim K.
  • Nikzad N.
  • Normand A.
  • Quer G.
  • Schmidt N.
  • Steinhubl S.
  • Topol E.
  • Vegreville M.
  • Wineinger N.

© American Journal of Hypertension, Ltd 2017. All rights reserved. BACKGROUND: Using the data from 56,365 individuals, from 185 countries, and a Nokia Health Wireless blood pressure (BP) monitor, we investigated real-world characteristics of BP variability (BPV). METHODS: All included individuals self-measured and uploaded their BP using Bluetooth at least ...

Achieving Ultra-Reliable Low-Latency Communications: Challenges and Envisioned System Enhancements

Ultra-reliable low-latency communications (URLLC) have the potential to enable a new range of applications and services: from wireless control and automation in industrial environments, to self-driving vehicles. The fifth generation (5G) wireless systems are faced by different challenges for supporting URLLC. Some of the challenges, particularly in downlink direction, are ...

SDN-based Wi-Fi Direct Clustering for Cloud Access in Campus Networks

  • Hamidouche L.
  • Iskounen S.
  • Mathieu F.
  • Monnet S.
  • Nguyen T.

Mobile cloud is changing the way to enroll teaching activities in university campus. Lectures and lab sessions can be carried out directly from tablets in a class room by accessing a server in the cloud. In this paper, we address the problem of high density cloud access with wireless devices ...

Collaborative Energy and Information Transfer in Green Wireless Sensor Networks for Smart Cities

  • Gong Y.
  • Liu X.
  • Lu W.
  • Peng H.
  • Wu J.

Smart city is able to make the city source and infrastructure more efficiently utilized, which improves the quality of life for citizens. In this framework, wireless sensor networks (WSNs) play an important role to collect, process, and analyze the corresponding information. However, the massive deployment of WSNs consumes a significant ...

MIMO Equalization for High-Speed Communication Under Channel Variability

  • Dries Vande Ginste
  • Guenach M.
  • Jelle Bailleul
  • Lennert Jacobs
  • Marc M.
  • Paolo Manfredi

High-speed communication over mutually coupled channels can be severely affected by intersymbol interference (ISI) and crosstalk (XT). Multiple-input multiple-output (MIMO) equalization is known to mitigate both ISI and XT, but requires accurate channel information at the receiver (RX) and/or transmitter (TX) when the channel is stochastic. However, since adjusting the ...

Density Decompositions of Networks

  • Borradaile G.
  • Migler T.
  • Wilfong G.

We introduce a new topological descriptor of a network called the density decomposition which is a partition of the nodes of a network into regions of uniform density. The decomposition we define is unique in the sense that a given network has exactly one density decomposition. The number of nodes ...

Error awareness in a multi-layer transport network operating system

Software-defined control based on a network operating system combined with flexible-bitrate optical transponders allows near zero-margin operation of optical networks to ""squeeze"" as much capacity out of a link as possible. Since their inception, optical transport networks have been designed with the assumption that operational optical links must essentially be ...

3GPP LTE-WLAN Aggregation Technologies: Functionalities and Performance Comparison

  • Henttonen T.
  • Laselva D.
  • Lopez-Perez D.
  • Rinne M.

The use of license exempt bands offers a promising opportunity to additionally enhance operator networks to meet the future traffic demand. The recent specification efforts in 3GPP has resulted in two major aggregation features that enable Long Term Evolution (LTE) networks to benefit of unlicensed spectrum via Wireless Local Area ...

Rejuvenating direct modulation and direct detection for modern optical communications

  • Che D.
  • Chen X.
  • Hu Q.
  • Li A.
  • Shieh W.

High-speed transoceanic optical fiber transmission using direct modulation (DM) and direct detection (DD) was one of the most stirring breakthroughs for telecommunication in 1990s, which drove the internet as a global phenomenon. However, the later evolution of optical coherent communications in 2000s gradually took over the long-haul applications, due to ...

A fully integrated scalable W-band phased-array module with integrated antennas, self-alignment and self-test

Advanced SiGe BiCMOS and CMOS processes continue to push the frontier on millimeter-wave (mm-wave) and highly integrated phased-array systems for a variety of communication applications [1,3]. Furthermore, next-generation mobile technology (5G) demands ultra-low latency and high data-rates with ubiquitous deployment supporting multi-users through the use of pico-cells. These cells may ...

OpenStack installation using Packstack installer

  • Juszczak G.

For several years, cloud computing has been increasingly appearing in the global IT market, both in corporate infrastructure and among private users. In medium and large companies, they replace the current, not very flexible, poorly scalable and often expensive computer infrastructure, and in the case of small businesses, startups and ...

Physical Layer Security on Fiber-Optic MIMO-SDM Systems: an Overview

  • Cho J.
  • Guan K.
  • Winzer P.

Fiber-optic transmission systems provide large capacities over enormous distance but are vulnerable to simple eavesdropping attacks at the physical layer. We classify key-based and keyless encryption and physical layer security techniques and discuss them in the context of optical multiple-input-multiple-output space-division multiplexed (MIMO-SDM) fiber-optic communication systems. We show that MIMO-SDM ...

Learning process for reducing uncertainties on network parameters and design margins

  • Delezoide C.
  • Pesic J.
  • Pointurier Y.
  • Seve E.

Using monitored physical parameters in a learning process, we decrease design margins by reducing uncertainties on the input parameters of a Quality of Transmission (QoT) tool, improving the accuracy of the signal-to-noise ratio prediction.

A 0.25 - 1.7-GHz, 3.9 -13.7 mW Power-Scalable, -10-dBm Harmonic Blocker-Tolerant Mixer-First RF-to-Digital Receiver for Massive MIMO Applications

  • Alon E.
  • Lacaille G.
  • Lu P.
  • Narevsky N.
  • Niknejad A.
  • Nikolic B.
  • Puglielli A.
  • Trotskovsky K.
  • Wang Z.
  • Whitcombe A.
  • Wright G.

To be cost-effective and energy-efficient, massive multiple-input multiple-output (MIMO) arrays must be constructed from radio elements with low power and high linearity, but can tolerate higher noise than conventional stand-alone radios. This letter presents a low-power 0.25-1.7-GHz power- and resolution-scalable mixer-first receiver tailored for variable-element massive MIMO systems with digital ...

Low profile concentric distributed resonators and filters

  • Bulja S.
  • Doumanis E.
  • Kozlov D.

In this paper we introduce a new family of low-profile and high quality factor distributed resonators, termed concentric distributed resonators. The study of the proposed resonators commences by the investigation of its key parameters, such as frequency of operation, quality factor and maximum electric fields as a function of the ...

Thermal memory effect characterization of GaN based class ABJ power amplifier using intrinsic temperature measurement

Enhancing power efficiency and bandwidth of RF power amplifiers (PAs) is always a challenge for future mobile basestation transceivers. Static and especially dynamic nonlinear effects are mainly responsible for decreasing before mentioned parameters. Static effects can be usually characterized by measuring the PA output with a defined input signal. Fast ...

Scalable Monitoring of End-to-End Delay in Live Video Services

  • Lopez Poncela J.
  • Perez P.
  • Ruiz Alonso J.
  • Villegas A.

In this article, we propose a simple method to monitor the end-to-end live lag in a way which is scalable and meaningful for the service providers. The proposal is based on detecting the wall-clock timestamp of the video frames at capture time and inserting it in-band, so that it is ...