4 research outputs found
An谩lisis comparativo del desempe帽o de receptores 贸pticos coherentes y no coherentes para GFDM en redes PON.
El objetivo fue analizar el desempe帽o de una transmisi贸n GFDM utilizando receptores 贸pticos
coherentes y no- coherentes, para lo cual se realiz贸 una transmisi贸n de una se帽al de radio frecuencia
sobre fibra usando la se帽al GFDM sobre una red 贸ptica pasiva (PON) a 10 Gb/s por medio de una cosimulaci贸n
OptSim 鈥揗atlab. La necesidad de mejorar el rendimiento de las futuras redes 5G
implicar谩 que el enlace de fronthaul sea un enlace de alta velocidad implementado sobre fibra 贸ptica,
para garantizar los requerimientos de la nueva generaci贸n de la red m贸vil. Con el fin de satisfacer
tasas de datos de usuario superiores a 10 Gb/s, con una latencia menor a 1ms, uno de los candidatos
principales es el esquema multiportadora GFDM como forma de onda para 5G. El desaf铆o es aumentar
la capacidad del enlace frontahaul el cual depende de la combinaci贸n de: el tipo de detecci贸n 贸ptica
que se emplee, los formatos de modulaci贸n y post-procesamiento digital de la se帽al. Adem谩s, una
buena opci贸n para el esquema de transmisi贸n a ser empleado es la transmisi贸n coherente, dado que
esta aumenta sustancialmente la capacidad del rendimiento de una red 贸ptica a comparaci贸n de los
esquemas basados en modulaci贸n de intensidad con detecci贸n directa. Los resultados obtenidos
demuestran una mejora apreciable en la sensibilidad del receptor (alrededor de 3 dB) empleando un
detector coherente. Dentro de esta perspectiva se avizora que la detecci贸n coherente permitir谩
incrementar la capacidad de las redes 贸pticas fronthaul. Sin embargo, una desventaja importante de
la transmisi贸n coherente es su alto costo de implementaci贸n. Adicionalmente se podr铆a realizar
estudios de pre-compensaci贸n y post-compensaci贸n de la dispersi贸n introducida en la se帽al por la
propagaci贸n de la misma en la fibra 贸ptica.The objective was to analyse the performance of GFDM transmission using coherent and noncoherent
optical receivers, for which a transmission of a radio frequency signal over fiber was made using
GFDM signal on a passive optical network (PON) at 10 Gb/s through an OptSim-Matlab cosimulation.
The
need
to
improve
the
performance
of
future
5G
networks
will
mean
that
the
fronthaul
will
be
a
high-speed
link
implemented
over
an
optical
fiber,
to
guarantee
the
requirements
of
the
new
generation
mobile
network.
In order to satisfy user data rates higher than 10 Gb/s, with a latency less than 1 ms, one of the main
candidates is the GFDM multi-carrier scheme as a 5G waveform. The challenge is to increase the
fronthaul link capacity which depends on the combination of: the type of optical detection that is
used, the modulation formats and digital post-processing of the signal. In addition, a good option for
the transmission scheme to be used is the coherent transmission, because this substantially increases
the performance capacity of an optical network compared to schemes based on intensity modulation
and direct detection. The results obtained show an appreciable improvement in the receiver sensitivity
(around 3 dB) using a coherent detector. Within this perspective it is envisioned that the coherent
detection will allow to increase the capacity of the fronthaul optical networks. However, an important
disadvantage of the coherent transmission is its high implementation cost. Additionally, dispersion
pre-compensation and post-compensation studies could be carried out introduced in the signal by the
propagation of its in the optical fiber
An谩lisis comparativo del desempe帽o de receptores 贸pticos coherentes y no coherentes para GFDM en redes PON.
El objetivo fue analizar el desempe帽o de una transmisi贸n GFDM utilizando receptores 贸pticos
coherentes y no- coherentes, para lo cual se realiz贸 una transmisi贸n de una se帽al de radio frecuencia
sobre fibra usando la se帽al GFDM sobre una red 贸ptica pasiva (PON) a 10 Gb/s por medio de una cosimulaci贸n
OptSim 鈥揗atlab. La necesidad de mejorar el rendimiento de las futuras redes 5G
implicar谩 que el enlace de fronthaul sea un enlace de alta velocidad implementado sobre fibra 贸ptica,
para garantizar los requerimientos de la nueva generaci贸n de la red m贸vil. Con el fin de satisfacer
tasas de datos de usuario superiores a 10 Gb/s, con una latencia menor a 1ms, uno de los candidatos
principales es el esquema multiportadora GFDM como forma de onda para 5G. El desaf铆o es aumentar
la capacidad del enlace frontahaul el cual depende de la combinaci贸n de: el tipo de detecci贸n 贸ptica
que se emplee, los formatos de modulaci贸n y post-procesamiento digital de la se帽al. Adem谩s, una
buena opci贸n para el esquema de transmisi贸n a ser empleado es la transmisi贸n coherente, dado que
esta aumenta sustancialmente la capacidad del rendimiento de una red 贸ptica a comparaci贸n de los
esquemas basados en modulaci贸n de intensidad con detecci贸n directa. Los resultados obtenidos
demuestran una mejora apreciable en la sensibilidad del receptor (alrededor de 3 dB) empleando un
detector coherente. Dentro de esta perspectiva se avizora que la detecci贸n coherente permitir谩
incrementar la capacidad de las redes 贸pticas fronthaul. Sin embargo, una desventaja importante de
la transmisi贸n coherente es su alto costo de implementaci贸n. Adicionalmente se podr铆a realizar
estudios de pre-compensaci贸n y post-compensaci贸n de la dispersi贸n introducida en la se帽al por la
propagaci贸n de la misma en la fibra 贸ptica.The objective was to analyse the performance of GFDM transmission using coherent and noncoherent
optical receivers, for which a transmission of a radio frequency signal over fiber was made using
GFDM signal on a passive optical network (PON) at 10 Gb/s through an OptSim-Matlab cosimulation.
The
need
to
improve
the
performance
of
future
5G
networks
will
mean
that
the
fronthaul
will
be
a
high-speed
link
implemented
over
an
optical
fiber,
to
guarantee
the
requirements
of
the
new
generation
mobile
network.
In order to satisfy user data rates higher than 10 Gb/s, with a latency less than 1 ms, one of the main
candidates is the GFDM multi-carrier scheme as a 5G waveform. The challenge is to increase the
fronthaul link capacity which depends on the combination of: the type of optical detection that is
used, the modulation formats and digital post-processing of the signal. In addition, a good option for
the transmission scheme to be used is the coherent transmission, because this substantially increases
the performance capacity of an optical network compared to schemes based on intensity modulation
and direct detection. The results obtained show an appreciable improvement in the receiver sensitivity
(around 3 dB) using a coherent detector. Within this perspective it is envisioned that the coherent
detection will allow to increase the capacity of the fronthaul optical networks. However, an important
disadvantage of the coherent transmission is its high implementation cost. Additionally, dispersion
pre-compensation and post-compensation studies could be carried out introduced in the signal by the
propagation of its in the optical fiber
An谩lisis de factibilidad para la implementaci贸n del protocolo IPSEC en el nodo de internet 2 de la Univerisidad Polit茅cnica Salesiana sede Quito, campus sur.
La red acad茅mica avanzada conocida como Internet 2, aporta a promover y optimizar los
procesos formativos en la educaci贸n superior, la generaci贸n de conocimiento y la
creaci贸n de nuevas tecnolog铆as, esto se lleva a cabo mediante el desarrollo de ciertas
aplicaciones sobre esta plataforma, inclusive la Universidad Polit茅cnica Salesiana Sede
Quito Campus Sur, se encuentra en fase de desarrollo de prototipos adem谩s de
proyectos en el 谩rea de la Telemedicina; en este aspecto el presente documento hace
referencia a brindar seguridad a esta red con el empleo de protocolo IPSec con el fin de
poner en marcha los prototipos y proyectos.
A diferencia de otros protocolos, este ofrece una soluci贸n a la seguridad transparente
para el usuario a su vez posee mecanismos de autenticaci贸n y confidencialidad
independientemente de las aplicaciones que se emplee. Para la implementaci贸n de dicho
protocolo se realiz贸 un estudio anal铆tico dentro de un escenario de simulaci贸n para redes
conocido como GNS3 apoyado en la herramienta Wireshark, arrojando cifras tales
como: el n煤mero de paquetes transportados, el tiempo de transmisi贸n dado que son
factores que determinan s铆, es factible realizar la implementaci贸n del protocolo se
seguridad IPSec en la red de Internet 2 en la UPS.The advanced academic network known as Internet 2, brings to promote and optimize
the learning processes in higher education, the creation of knowledge and the creation of
new technologies, this is done by developing some applications on this platform,
including Salesian University South Campus is in prototype development phase as well
as projects in the area of telemedicine and in this respect the present document refers to
providing security to the network with the use of IPSec protocol in order to make
prototypes and production projects.
Unlike other protocols, this provides a solution to the security transparent to the user in
turn holds authentication and confidentiality mechanisms irrespective of the applications
being used. For the implementation of this protocol was performed an analytical study in
a simulation scenario known as GNS3 networks supported by Wireshark tool , throwing
figures such as the number of packages shipped , the transmission time as other factors
that determine it is feasible to implement the IPSec security protocol on the Internet 2 in
the UPS
Machine Learning Techniques in Optical Networks: A Systematic Mapping Study
During the last decade, optical networks have become “smart networks”. Software-defined networks, software-defined optical networks, and elastic optical networks are some emerging technologies that provide a basis for promising innovations in the functioning and operation of optical networks. Machine learning algorithms are providing the possibility to develop this promising study area. Since machine learning can learn from a large amount of data available from the network elements. They can find a suitable solution for any environment and thus create more dynamic and flexible networks that improve the user experience. This paper performs a systematic mapping that provides an overview of machine learning in optical networks, identifies opportunities, and suggests future research lines. The study analyzed 96 papers from the 841 publications on this topic to find information about the use of machine learning techniques to solve problems related to the functioning and operation of optical networks. It is concluded that supervised machine learning techniques are mainly used for resource management, network monitoring, fault management, and traffic classification and prediction of an optical network. However, specific challenges need to be solved to successfully deploy this type of method in real communication systems since most of the research has been carried out in controlled experimental environments