Accurate Quality of Transmission estimation with machine learning

In optical transport networks the Quality of Transmission (QoT) is estimated before provisioning new connections or upgrading existing ones. Traditionally, a physical layer model (PLM) is used for QoT estimation coupled with high margins. Margins are used to account for the uncertainty in the evolving physical layer conditions and ensure ...

Optimization model for Cross-Domain Network Slices in 5G Networks

Network Slicing (NS) is a key enabler of the upcoming 5G system and beyond, leveraging on both Network Function Virtualization (NFV) and Software Defined Networking (SDN), NS will enable a flexible deployment of Network Functions (NFs) belonging to multiple Service Function Chains (SFC) over various administrative and technological domains. Our ...

Analytical Modeling and Experimental Validation of NB-IoT Device Energy Consumption

The recent standardization of 3GPP Narrowband IoT (NB-IoT) paves the way to support Low-Power Wide-Area (LPWA) use cases in cellular networks. NB-IoT design goals are extended coverage, low power and low cost devices, and massive connections. As a new radio access technology, it is necessary to analyze the possibilities NB-IoT ...

Context-Awareness Enhances 5G Multi-Access Edge Computing Reliability

The fifth generation (5G) mobile telecommunication network is expected to support Multi- Access Edge Computing (MEC), which intends to distribute computation tasks and services from the central cloud to the edge clouds. Towards ultra-responsive, ultra-reliable and ultra-low-latency MEC services, the current mobile network security architecture should enable a more decentralized ...

Survey on UAV Cellular Communications: Practical Aspects, Standardization Advancements, Regulation, and Security Challenges

The rapid growth of consumer Unmanned Aerial Vehicles (UAVs) is creating promising new business opportunities for cellular operators. On the one hand, UAVs can be connected to cellular networks as new types of user equipment, therefore generating significant revenues for the operators that guarantee their stringent service requirements. On the ...

400 Gbps Dual-Polarization Non-linear Frequency-Division Multiplexed Transmission with b-Modulation

We demonstrate in simulation a 400 Gbps polarisation-multiplexed 1050x32-QAM NFDM transmission using b-modulation on the continuous nonlinear spectrum. A significant improvement in Q-factor over $q_c$-modulation is observed.

Beam Management in 5G NR using Geolocation Side Information

A machine learning solution leveraging geolocation side information is proposed for enhancing beam management in 5G NR millimeter wave (mmWave) wireless systems. An important building block of our solution are the support vector machines (SVMs), which are used to model the mapping between the user equipments' (UEs) geolocations and their ...

Pre-Matched Eigenmode Antenna With Polarization and Pattern Diversity

In this paper we propose an antenna design procedure based on the eigenmode decomposition technique which avoids the use of the external matching networks that are typically required at the input ports of the mode decomposition network (MDN). We illustrate the technique by examining the properties of a circularly symmetrical ...

Characterization of Coupled-Core Fiber Amplifiers Using Swept-Wavelength Interferometer

We present a characterization technique for coupled space-division multiplexed (SDM) amplifiers, that can measure the complex transfer matrix over the whole wavelength range of interest of an amplifier under nominal input spectrum and power condition. The measurements are essential for the performance estimation of an SDM system.

A SiGe HBT BiCMOS 1-to-4 ADC frontend supporting 100 GBaud PAM4 reception at 14 GHz digitizer bandwidth

We introduce a SiGe HBT BiCMOS 1-to-4 ADC frontend that supports 100 GBaud PAM4 recep-tion at digitizer bandwidths down to 14 GHz. We successfully demonstrate its performance in SMF transmission experiments up to 40 km.

Modal Dynamics in Spatially Multiplexed Links

We investigate the vibration sensitivity of spatially multiplexed links by measuring the mode-coupling dynamics of a four-core coupled-core fiber and a reference single-mode fiber. We show that the speed of dynamics increases with mode count.

Deep Learning Propagation Models over Irregular Terrain

Accurate path gain models are critical for coverage prediction and RF planning in wireless communications. In many settings irregular terrain induces blockages and scattering with great impact on path gain, making its prediction a challenging task. Current solutions for these environments are either computationally expensive or slope-intercept fits that cannot ...

Automated fiber type identification in SDN-enabled optical networks

We correlate accumulated dispersions measured in coherent receivers to autonomously identify fiber types in a 41-link network without traffic interruption. We achieve 99.66% identification level with only 100 uniformly distributed light paths, even with a 400 ps/nm measurement uncertainty

Recent Advances in Ultra-Wideband WDM Transmission based on Semiconductor Optical Amplifiers

We report on the use of semiconductor optical amplifiers to enlarge optical bandwidth of next generation WDM systems. We review recent results, including lab demonstration and field trial, based on novel 100+nm-wide SOA device.

5×510 Gbps Single-Polarization Direct-Detection WDM Transmission over 80 km of SSMF

We demonstrate 5-channel WDM DD transmissions over 80 km of SSMF with a net data rate per channel of 432 Gbps using either Kramers-Kronig detection or a low-complexity interference cancellation scheme

Experimental Verification of Equalization Enhanced Phase Noise in Kramers-Kronig Transmissions

We experimentally investigate, for the first time, the impact of laser phase noise in a 30 Gbaud 64 QAM system with Kramers-Kronig receiver, showing significant impacts of phase-to-amplitude noise conversion and equalization enhanced phase noise

Multi-Rate Prefix-Free Code Distribution Matching

We propose a multi-rate prefix-free code distribution matching (PCDM) algorithm that implements a fixed-length probabilistic constellation shaping. It uses various small codebooks in an adaptive manner, thereby improving the shaping performance of PCDM.

Slotted Optical Datacenter Networks with Sub-wavelength Resource Allocation

We give a formal description of dynamic resource allocation in a slotted DC network and present fast scheduling solutions to solve it. We then review the related scalability issues.

How 64 GBaud optical carriers maximize the capacity in core elastic WDM networks with fewer transponders per Gb/s

Following the extensive investigations of the research community throughout the last 5 years regarding the transmission performance when roughly doubling the channel symbol rate in WDM systems from generic 32 GBaud to more than 60 GBaud, this evolution is about to become a reality in the field by the next ...

Pilot Allocation for Computationally Efficient Non-Iterative Estimation of Phase Noise in OFDM

This paper proposes a pilot subcarrier allocation approach for OFDM waveforms, which enables construction of phase-noise estimate with high efficiency and low overhead in non-iterative manner. The complexity and the performance of the overall phase-noise suppression algorithm together with the proposed pilot allocation approach are evaluated against a reference algorithm. ...