426 research outputs found
What comes after optical-bypass network? A study on optical-computing-enabled network
A new architectural paradigm, named, optical-computing-enabled network, is
proposed as a potential evolution of the currently used optical-bypass
framework. The main idea is to leverage the optical computing capabilities
performed on transitional lightpaths at intermediate nodes and such proposal
reverses the conventional wisdom in optical-bypass network, that is, separating
in-transit lightpaths in avoidance of unwanted interference. In
optical-computing-enabled network, the optical nodes are therefore upgraded
from conventional functions of add-drop and cross-connect to include optical
computing / processing capabilities. This is enabled by exploiting the
superposition of in-transit lightpaths for computing purposes to achieve
greater capacity efficiency. While traditional network design and planning
algorithms have been well-developed for optical-bypass framework in which the
routing and resource allocation is dedicated to each optical channel
(lightpath), more complicated problems arise in optical-computing-enabled
architecture as a consequence of intricate interaction between optical channels
and hence resulting into the establishment of the so-called integrated /
computed lightpaths. This necessitates for a different framework of network
design and planning to maximize the impact of optical computing opportunities.
In highlighting this critical point, a detailed case study exploiting the
optical aggregation operation to re-design the optical core network is
investigated in this paper. Numerical results obtained from extensive
simulations on the COST239 network are presented to quantify the efficacy of
optical-computing-enabled approach versus the conventional
optical-bypass-enabled one.Comment: 17 pages, 3 figures, 4 tables; the author's version that has been
accepted to Optical Fiber Technology Journal 202
Observing and Modeling the Physical Layer Phenomena in Open Optical Systems for Network planning and management
L'abstract è presente nell'allegato / the abstract is in the attachmen
Thirty Years of Machine Learning: The Road to Pareto-Optimal Wireless Networks
Future wireless networks have a substantial potential in terms of supporting
a broad range of complex compelling applications both in military and civilian
fields, where the users are able to enjoy high-rate, low-latency, low-cost and
reliable information services. Achieving this ambitious goal requires new radio
techniques for adaptive learning and intelligent decision making because of the
complex heterogeneous nature of the network structures and wireless services.
Machine learning (ML) algorithms have great success in supporting big data
analytics, efficient parameter estimation and interactive decision making.
Hence, in this article, we review the thirty-year history of ML by elaborating
on supervised learning, unsupervised learning, reinforcement learning and deep
learning. Furthermore, we investigate their employment in the compelling
applications of wireless networks, including heterogeneous networks (HetNets),
cognitive radios (CR), Internet of things (IoT), machine to machine networks
(M2M), and so on. This article aims for assisting the readers in clarifying the
motivation and methodology of the various ML algorithms, so as to invoke them
for hitherto unexplored services as well as scenarios of future wireless
networks.Comment: 46 pages, 22 fig
Modelling, Dimensioning and Optimization of 5G Communication Networks, Resources and Services
This reprint aims to collect state-of-the-art research contributions that address challenges in the emerging 5G networks design, dimensioning and optimization. Designing, dimensioning and optimization of communication networks resources and services have been an inseparable part of telecom network development. The latter must convey a large volume of traffic, providing service to traffic streams with highly differentiated requirements in terms of bit-rate and service time, required quality of service and quality of experience parameters. Such a communication infrastructure presents many important challenges, such as the study of necessary multi-layer cooperation, new protocols, performance evaluation of different network parts, low layer network design, network management and security issues, and new technologies in general, which will be discussed in this book
- …