5 research outputs found
Diseño de redes de telecomunicación para el despliegue universal de servicios avanzados de telecomunicación
La revolución digital promete grandes avances y progresos. Sin embargo, la Sociedad de la Información está fuertemente vinculada al desarrollo de las redes de telecomunicación. El elevado coste de estas infraestructuras está obligando a las compañÃas a centrar sus esfuerzos inversores en aquellos sectores en que se presumen mayores beneficios. En este sentido la puesta en marcha de mecanismos que permitan cruzar la brecha digital se está convirtiendo en una acción necesaria. Presentamos aquà el estudio de un caso correspondiente al diseño de una red de alta velocidad construida mediante un sistema de ayuda a la toma decisiones a partir de una serie de modelos que hacen uso de un motor de optimización basado en algoritmos genéticos. Para ello se hace uso de datos reales procedentes de la Industria de las Telecomunicaciones y se presenta una familia de soluciones separada por niveles de cobertura.Ministerio de Ciencia y TecnologÃa TIC2003-04784-C02-0
An Improved Upper Bound for the Ring Loading Problem
The Ring Loading Problem emerged in the 1990s to model an important special
case of telecommunication networks (SONET rings) which gained attention from
practitioners and theorists alike. Given an undirected cycle on nodes
together with non-negative demands between any pair of nodes, the Ring Loading
Problem asks for an unsplittable routing of the demands such that the maximum
cumulated demand on any edge is minimized. Let be the value of such a
solution. In the relaxed version of the problem, each demand can be split into
two parts where the first part is routed clockwise while the second part is
routed counter-clockwise. Denote with the maximum load of a minimum split
routing solution. In a landmark paper, Schrijver, Seymour and Winkler [SSW98]
showed that , where is the maximum demand value. They
also found (implicitly) an instance of the Ring Loading Problem with . Recently, Skutella [Sku16] improved these bounds by showing that , and there exists an instance with .
We contribute to this line of research by showing that . We
also take a first step towards lower and upper bounds for small instances
Planning a Ring-Tree Network to provide Telecommunication Services at Centres of Rural Population
Nowadays
certain
centres
of rural
population
are experimenting
difficulties
to access
high-speed
telecommunication
networks.
This
phenomenon
avoids
the possibility
of accessing
to the digital
revolution
for
such
areas.
The private
companies
are focusing
their invest
ment
efforts
in other
more
profitable
areas.
In such
conditions,
the governments
have
to promote
alternatives
to bridge
the digital
divide
between
rural
and urban
areas.
We present
how
ring-tree
topologies
can be used
as an adequate
architecture
to incorporate
such
less
favoured
areas
in the Information
Society.
We present
a
case study
for Andalucia
(a wide
region
in the south
of
Spain)
where
a decision
support
system
based
on a genetic
algorithm
is implemented
providing
cost effective
solutions.
We make
use of real life data from
the telecommunication
industry
and present
different
solutions
separated
by coverage
as well as a sensitivity
analysis
based
on the main
factors
of the cost function.Ministerio de Ciencia y TecnologÃa TIC2003 -04784-C02-0