Integrated Hybrid Wavelength-tunable III-V/Silicon transmitter based on ring-assisted Mach-Zehnder interferometer modulator

  • Brenot R.
  • De Valicourt G.
  • Dong P.
  • Eggleston M.
  • Kim K.
  • Lee S.
  • Zhu C.

We demonstrate a wavelength-tunable hybrid III-V/Si transmitter based on a Vernier laser with more than 30 nm tuning range and two microring modulators nested in a Mach-Zehnder interferometer. This transmitter circuit has versatile operating modes. It can be used for OOK generation based on low drive voltage push-pull ring modulators ...

An RNS-Based Forwarding Approach To Implement SFC

  • Hu Z.
  • Zhao M.

Because of the more and more diversified service, SFC needs to be dynamically and feasibly implemented. Thanks to NFV and SDN ideas, the new SFC architecture is defined to meet the requirements in the IETF. Based on the OpenFlow, the approach of the single flow table is used to implement ...

Typhoon: An SDN Enhanced Real-Time Big Data Streaming Framework

  • Chang H.
  • Cho J.
  • Lakshman T.
  • Mukherjee S.
  • Van Der Merwe J.

Current big data streaming frameworks focus mainly on the scalability of real-time stream data processing, and are not flexible, controllable, and programmable enough to accomodate dynamic streaming application needs. For example, current frameworks do not deal well with use cases like updating routing and computation logic, or enabling live debugging ...

Low-Profile Miniaturized Coaxial Cavity Resonators and Filters

  • Bulja S.
  • Dmitry Kozlov
  • Doumanis E.

A new class of coaxial cavity filters with low-profile is proposed. The additional benefits of the technology include: volume reduction, high performance, and superior spurious free-response. The proposed resonator consists of a cavity enclosure and three metallic conductors; an outer hollow cylinder, an inner hollow cylinder protruding the cavity from ...

Simple optoelectronic frequency-offset estimator for coherent optical OFDM

  • Corcoran B.
  • Jignesh J.
  • Lowery A.
  • Zhu C.

We propose a carrier frequency-offset estimator for optical OFDM systems using off-the-shelf optical components and simple digital processing as a replacement for the purely digital signal processing using the cyclostationarity property of optical OFDM signals with cyclic prefix. Simulations show the system accuracy of < 4% estimate error within the ...

Optimal Control of Storage Regeneration with Repair Codes

  • De Pellegrini F.
  • El-Azouzi R.
  • Hassani O.
  • Silva A.

High availability of containerized applications requires to perform robust storage of applications' state. Since basic replication techniques are extremely costly at scale, storage space requirements can be reduced by means of erasure and/or repairing codes. In this paper we address storage regeneration using repair codes, which is a robust distributed ...

Coverage and Capacity Impact of Mobility and Human Body Blocking at Millimeter Waves

  • Kaya A.
  • Viswanathan H.

We investigate the impact human body blocking on the performance of millimeter wave wireless systems in an urban hotspot scenario. The effects of human body blocking at higher frequency bands are expected to be more severe than at traditional cellular bands because of worse signal propagation through the human body. ...

System-Level Performance Evaluation for 5G mmWave Cellular Network

  • Gacanin H.
  • Jonathan Rodriguez
  • Kazi M. S. Huq
  • Shahid Mumtaz
  • Sherif A. Busari

Cellular networks with hyper-dense deployment of small cells have been identified as the performance-optimizing architecture for fifth-generation (5G) mobile systems. A thousandfold capacity increase is projected when such networks benefit from aggressive spatial multiplexing and huge bandwidth, realizable with massive antenna arrays and millimeter-wave (mmWave) spectrum, respectively. As a precursor ...

What is the Optimal Network Deployment for a Fixed Density of Antennas?

  • Guoqiang Mao
  • Lopez-Perez D.
  • Ming Ding
  • Xuefeng Yao
  • Zihuai Lin

In this paper, we answer a fundamental question: when the total number of antennas per square kilometer is fixed, what is the optimal network deployment? A denser network with a less number of antennas per base station (BS) or the opposite case. To evaluate network performance, we consider a practical ...

Robust Regularised Channel Inversion for Massive MIMO Unlicensed

  • Ding M.
  • Garcia Rodriguez A.
  • Geraci G.
  • Qiang H.
  • Yuan J.

In this paper, we propose a robust regularised channel inversion (RRCI) approach to improve the downlink performance of massive multiple-input multiple-output unlicensed (mMIMO-U) under imperfect channel state information (CSI). We first derive the optimal parameter $alpha$ for regularised channel inversion (RCI). We then compare the beamforming performance among our proposed ...

Ultra-Dense Networks: A New Look at the Proportional Fair Scheduler

  • Amir H. Jafari
  • Guoqiang Mao
  • Lopez-Perez D.
  • Ming Ding
  • Zihuai Lin

In this paper, we theoretically study the proportional fair (PF) scheduler in the context of ultra-dense networks (UDNs). Analytical results are obtained for the coverage probability and the area spectral efficiency (ASE) performance of dense small cell networks (SCNs) with the PF scheduler employed at base stations (BSs). For the ...

Scaling Deep Learning-based Decoding of Polar Codes via Partitioning

  • Cammerer S.
  • Gruber T.
  • Hoydis J.
  • Ten Brink S.

The training complexity of deep learning-based channel decoders scales exponentially with the codebook size and therefore with the number of information bits. Thus, neural network decoding (NND) is currently only feasible for very short block lengths. In this work, we show that the conventional iterative decoding algorithm for polar codes ...

Dynamic TDD: the Asynchronous Case and the Synchronous Case

  • Guoqiang Mao
  • Lopez-Perez D.
  • Ming Ding
  • Zihuai Lin

Small cell networks (SCNs) are envisioned to embrace dynamic time division duplexing (TDD) in order to tailor downlink (DL)/uplink (UL) subframe resources to quick variations and burstiness of DL/UL traffic. The study of dynamic TDD is particularly important because it serves as the predecessor of the full duplex transmission technology, ...

Towards a cognitive warning system for safer hybrid traffic

  • Csépe V.
  • Honbolygó F.
  • Mallet P.
  • Mestre D.
  • Pergandi J.
  • Török Á.
  • Varga K.

Technological development brings increasingly closer the era of widely available self-driving cars. However, presumably there will be a time where human drivers and self-driving cars would share the same roads. In the current paper, we propose a cognitive warning system that utilizes information collected from the behaviour of the human ...

Efficiency of Cloud-Based Application Services

  • Bauer E.

This theoretical work deeply analyzes operational and economic efficiency of producing services for end users from applications executing on cloud computing platforms. Operational efficiency is factored into service production efficiency, capacity utilization efficiency and VNF efficiency. A dynamic, time-driven, activity-based cost model of service production is derived. Six efficiency improvement ...

Agent composition for 5G management and orchestration

  • Raisanen V.

Virtualized execution environments in 5G network call for a linkage between network management and orchestration. Execution of 3GPP functionalities and management applications in the cloud also presents an opportunity to innovate outside of traditional paradigms. We describe a framework focusing on a virtual execution environment and utilizing agent composition to ...

Connectivity extraction in cloud infrastructures

  • Dubus S.
  • Kanoun W.
  • Mensah P.
  • Morin C.
  • Piolle G.
  • Totel E.

For management and security purposes, cloud providers should know the connectivity graph between virtual machines. Since traditional methods used in physical networks produce incomplete results and are hardly usable in the Cloud, we propose to use information provided by a Cloud Management Software and an SDN controller, to compute the ...

Impact of timing mismatch in multicarrier spectral-slicing transmission system using single coherent receiver

  • Le S.
  • Nguyen D.
  • Nguyen H.
  • Nguyen T.
  • Truong D.

Summary form only given. Strong light-matter coupling has been recently successfully explored in the GHz and THz [1] range with on-chip platforms. New and intriguing quantum optical phenomena have been predicted in the ultrastrong coupling regime [2], when the coupling strength Ω becomes comparable to the unperturbed frequency of the ...

Future scenarios and value network configurations for industrial 5G

Billions of connected devices with new application requirements, deployment scenarios and business models will emerge in the future. 5G will follow both evolutionary path, that is, enhanced mobile broadband and coverage, and revolutionary path, that is, massive and critical Machine Type Communications (MTC). These MTC, also known as Machine-to-Machine (M2M) ...

One solution of decision making algorithm for semi-autonomous driving

  • ŽLukaä?
  • Majkic M.
  • Peles N.
  • Samard D.

The topic of decision making algorithm in semi-autonomous driving is discussed in this paper. Semi-autonomous vehicle is capable of many aspects of autonomous driving. But, there are situations that semi-autonomous driving algorithm is not capable to handle. In such situations vehicle control is given to driver. This kind of an ...