73 research outputs found
Census Tract License Areas: Disincentive for Sharing the 3.5GHz band?
Flexible licensing model is a necessary enabler of the technical and
procedural complexities of Spectrum Access System (SAS)-based sharing
framework. The purpose of this study is to explore the effectiveness of 3.5GHz
Licensing Framework - based on census tracts as area units, areas whose main
characteristic is population. As such, the boundary of census tract does not
follow the edge of wireless network coverage. We demonstrate why census tracts
are not suitable for small cell networks licensing, by (1) gathering and
analysing the official census data, (2) exploring the boundaries of census
tracts which are in the shape of nonconvex polygons and (3) giving a measure of
effectiveness of the licensing scheme through metrics of area loss and the
number of people per census tract with access to spectrum. Results show that
census tracts severely impact the effectiveness of the licensing framework
since almost entire strategically important cities in the U.S. will not avail
from spectrum use in 3.5GHz band. Our paper does not seek to challenge the core
notion of geographic licensing concept, but seeks a corrective that addresses
the way the license is issued for a certain area of operation. The effects that
inappropriate size of the license has on spectrum assignments lead to spectrum
being simply wasted in geography, time and frequency or not being assigned in a
fair manner. The corrective is necessary since the main goal of promoting
innovative sharing in 3.5 GHz band is to put spectrum to more efficient use.Comment: 7 pages, 5 figures, conferenc
WHO-IS: Wireless Hetnet Optimization using Impact Selection
We propose a method to first identify users who have the most negative impact
on the overall network performance, and then offload them to an orthogonal
channel. The feasibility of such an approach is verified using real-world
traces, network simulations, and a lab experiment that employs multi-homed
wireless stations. In our experiment, as offload target, we employ LiFi IR
transceivers, and as the primary network we consider a typical Enterprise Wi-Fi
setup. We found that a limited number of users can impact the overall
experience of the Wi-Fi network negatively, hence motivating targeted
offloading. In our simulations and experiments we saw that the proposed
solution can improve the collision probability with 82% and achieve a 61
percentage point air utilization improvement compared to random offloading,
respectively
An Overview on Application of Machine Learning Techniques in Optical Networks
Today's telecommunication networks have become sources of enormous amounts of
widely heterogeneous data. This information can be retrieved from network
traffic traces, network alarms, signal quality indicators, users' behavioral
data, etc. Advanced mathematical tools are required to extract meaningful
information from these data and take decisions pertaining to the proper
functioning of the networks from the network-generated data. Among these
mathematical tools, Machine Learning (ML) is regarded as one of the most
promising methodological approaches to perform network-data analysis and enable
automated network self-configuration and fault management. The adoption of ML
techniques in the field of optical communication networks is motivated by the
unprecedented growth of network complexity faced by optical networks in the
last few years. Such complexity increase is due to the introduction of a huge
number of adjustable and interdependent system parameters (e.g., routing
configurations, modulation format, symbol rate, coding schemes, etc.) that are
enabled by the usage of coherent transmission/reception technologies, advanced
digital signal processing and compensation of nonlinear effects in optical
fiber propagation. In this paper we provide an overview of the application of
ML to optical communications and networking. We classify and survey relevant
literature dealing with the topic, and we also provide an introductory tutorial
on ML for researchers and practitioners interested in this field. Although a
good number of research papers have recently appeared, the application of ML to
optical networks is still in its infancy: to stimulate further work in this
area, we conclude the paper proposing new possible research directions
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