Enabling RAN Moderation and Dynamic Traffic Steering in 5G

  • Bulakci Ö.
  • Ericson M.
  • Fantini R.
  • Moya F.
  • Prasad A.

The exponential increase in capacity and data rate demands, along with the diversification of use cases and verticals that are planning to use cellular radio access networks (RANs) to provide connectivity, has prompted the development of the fifth generation (5G) of radio access technology. Traffic steering, which aims at optimum ...

Coverage and Capacity Analysis of LTE-M and NB-IoT in a Rural Area

  • Holst S.
  • Kovacs I.
  • Lauridsen M.
  • Mogensen P.
  • Sorensen M.

The 3GPP has introduced the LTE-M and NB-IoT User Equipment categories and made amendments to LTE release 13 to support the cellular Internet of Things. The contribution of this paper is to analyze the coverage probability, the number of supported devices, and the device battery life in networks equipped with ...

A Simple Statistical Signal Loss Model for Deep Underground Garage

  • Gimenez L.
  • Kovacs I.
  • Mogensen P.
  • Nguyen H.
  • Rodriguez I.
  • Sorensen T.

In this paper we address the channel modeling aspects for a deep-indoor scenario with extreme coverage conditions in terms of signal losses, namely underground garage areas. We provide an in- depth analysis with regard to the path loss (gain) and large-scale signal shadow fading, and propose a simple propagation model ...

Optical filter requirements in an EML-based single-sideband PAM4 intensity-modulation and direct-detection transmission system

  • Chen J.
  • Chen H.
  • Chen Y.
  • Kaneda N.
  • Lee S.

The feasibility of a single sideband (SSB) PAM4 intensity-modulation and direct-detection (IM/DD) transmission based on a CMOS ADC and DAC is experimentally demonstrated in this work. To cost effectively build a >50 Gb/s system as well as to extend the transmission distance, a low cost EML and a passive optical ...

Diversity Trade-Offs and Joint Coding Schemes for Highly Reliable Wireless Transmissions

  • Awada A.
  • Fettweis G.
  • Ohmann D.
  • Simsek M.
  • Viering I.

High reliability and low latency are key requirements for a number of upcoming use cases and applications in mobile communication networks. In order to address the requirements, we present statistical models which capture the most important radio propagation phenomena, such as path loss, shadowing, and small scale fading. The models ...

High Speed Electronics

  • Chen Y.

Short course at OFC 2017 on High Speed Electronics

Athermal operation of a multi-section laser

  • Bello F.
  • Donegan J.
  • Enright R.
  • O'Reilly Meehan R.
  • Wallace M.

Two distinct athermal bias current control procedures are demonstrated for a low-cost, monotlithic, three section slotted single mode laser, achieving wavelength stability of ±0.01 nm over a temperature range of 10-85C. This is the first time that athermal performance has been demonstrated for a three-section slotted laser with simple fabrication, ...

Can Metro Networks Be the Next Playground for (True) Elastic Optical Networks

  • Bigo S.
  • Dupas A.
  • Layec P.
  • Verchere D.

Metro networks, being at the meeting point between telecom operators and over-the-top service providers, are particularly well-suited to the introduction of some level of dynamics in the optical networks, leveraging elastic building blocks such as transponders and optical nodes. We review some metro networks challenges appealing for innovative solutions in ...

Recent Progress on Standardization of Next Generation 25, 50 and 100G EPON

  • Harstead E.
  • Houtsma V.
  • Van Veen D.

In this paper an overview is given on the recent developments in next generation high speed PON. A summary is presented on the progress being made by the IEEE P802.3ca task force on the standardization of 25, 50 and 100G EPON. An outline of the physical layer specification for next ...

Optical Ethernet - Flexible Optical Metro Networks

  • Benzaoui N.
  • Buchali F.
  • Dembeck L.
  • Dischler R.
  • Franz B.
  • Gebhard U.
  • Lautenschlaeger W.
  • Leven A.
  • Milbrandt J.
  • Pointurier Y.
  • Roesener D.
  • Schmalen L.

Enhanced flexibility in optical transport networks is a key requirement to support dynamic traffic load in packet based networks. Today, flexibility is reached by packet switches connected by static point-to-point transport connections. Wide-stretched synchronization patterns, line coding schemes, and Forward Error Correction frames (FEC) prohibit flexibility right in the transport. ...

Proposals for Cost-Effectively Upgrading Passive Optical Networks to a 25G Line Rate

  • Houtsma V.
  • Van Veen D.

Bandwidth demands keep increasing, inspiring researchers to continue to find cost-effective ways to increase the line rate in PON systems. In this paper we present and discuss proposals to upgrade 10G PONs with a 25 Gbps line rate at low cost and with low power consumption. Our proposals are based ...

Hybrid integrated wavelength and reflectivity tunable III-V/Silicon transmitter

  • Bolle C.
  • Brenot R.
  • Chang C.
  • Chen Y.
  • De Valicourt G.
  • Dong P.
  • Earnshaw M.
  • Eggleston M.
  • Kaneda N.
  • Maho A.
  • Melikyan A.

We demonstrate a novel wavelength-tunable hybrid silicon-based transmitter with integrated reflectivity tunable mirror. First, designs of a novel hybrid laser based on reflective symmetric and asymmetric Mach-Zehnder interferometer based mirrors are studied with single and double ring intra-cavity filters respectively. Asymmetric configuration is used in order to increase the tuning ...

Computational Study of the Noise Radiation in a Centrifugal Pump with Varying Flow Rate

  • Lei S.

In this paper, a three-dimensional unsteady hydro/aero acoustic model with Large Eddy Simulation (LES) closure is developed to explore noise radiation patterns in a centrifugal pump at different flow rates. Specifically, the Ffowcs Williams-Hawkings model (FW-H) is employed to predict noise generation by the blades as well as the volute. ...

Analysis and Diagnosis of SLA Violations in a Production SaaS Cloud

  • Ganesan R.
  • Iyer R.
  • Kalbarczyk Z.
  • Martino C.
  • Sarkar S.

A software-as-a-service (SaaS) needs to provide its intended service as per its stated service-level agreements (SLAs). While SLA violations in a SaaS platform have been reported, not much work has been done to empirically characterize failures of SaaS. In this paper, we study SLA violations of a production SaaS platform, ...

SleepTalker: A ULV 802.15.4a IR-UWB Transmitter SoC in 28-nm FDSOI Achieving 14 pJ/b at 27 Mb/s With Channel Selection Based on Adaptive FBB and Digitally Programmable Pulse Shaping

  • Bol D.
  • Cathelin A.
  • De Streel G.
  • Durant F.
  • Frenkel C.
  • Gurne T.
  • Stas F.

Achieving wireless communications at 5-30 Mb/s in energy-harvesting Internet-of-Things (IoT) applications requires energy efficiencies better than 100 pJ/b. Impulse-radio ultrawideband (UWB) communications offer an efficient way to achieve high data rate at ultralow power for short-range links. We propose a digital UWB transmitter (TX) system-on-chip (SoC) designed for ultralow voltage ...

Reduced Switching Connectivity for Large Scale Antenna Selection

  • Garcia Rodriguez A.
  • Masouros C.
  • Rulikowski P.

In this paper, we explore reduced-connectivity radio frequency (RF) switching networks for reducing the analog hardware complexity and switching power losses in antenna selection (AS) systems. In particular, we analyze different hardware architectures for implementing the RF switching matrices required in AS designs with a reduced number of RF chains. ...

Advanced C+L-Band Transoceanic Transmission Systems Based on Probabilistically-Shaped PDM-64QAM

  • Brindel P.
  • Buchali F.
  • Carbo Meseguer A.
  • Charlet G.
  • Fernandez I.
  • Ghazisaeidi A.
  • Hu Q.
  • Renaudier J.
  • Rios-Muller R.
  • Schmalen L.
  • Tran P.

We review the most recent, advanced concepts and methods employed in the cutting-edge spectrally-efficient coherent fiber-optic transoceanic transmission systems, such as probabilistic shaping, adaptive digital nonlinear compensation, rate-adaptive spatially-coupled low density parity check codes, and dual-band C+L-band transmission. Building upon all these concepts and methods, we demonstrate transmission of 179 ...

Multicarrier Approaches for high-baudrate Optical-Fiber Transmission Systems with a Single Coherent Receiver

  • Ludo V. Compernolle
  • Marc Wuilpart
  • Patrice Me´Gret
  • Qinwei He
  • Thai Le S.
  • Tu T. Nguyen

In this paper, we show the remarkable timing error (TE) and residual chromatic dispersion (CD) tolerance improvements of the filter bank multicarrier (FBMC) over orthogonal frequency division multiplexing (OFDM) for high-baudrate spectral slicing transmitter and a single coherent receiver transmissions. For a 512 Gb=s 16 quadrature amplitude modulated (16QAM) spectrum ...

Topology-Aware Prediction of Virtual Network Function Resource Requirements

  • Boutaba R.
  • Davy A.
  • Davy S.
  • Hasija S.
  • Jennings B.
  • Mijumbi R.

Network functions virtualization (NFV) continues to gain attention as a paradigm shift in the way telecommunications services are deployed and managed. By separating network function from traditional middleboxes, NFV is expected to lead to reduced capital expenditure and operating expenditure, and to more agile services. However, one of the main ...

Cell-Free Massive MIMO versus Small Cells

  • Ashikhmin A.
  • Larsson E.
  • Marzetta T.
  • Ngo H.
  • Yang H.

A Cell-Free Massive MIMO (multiple-input multiple-output) system comprises a very large number of distributed access points (APs)which simultaneously serve a much smaller number of users over the same time/frequency resources based on directly measured channel characteristics. The APs and users have only one antenna each. The APs acquire channel state ...