Papers by Liliana Carrillo
Proceedings. ISCC 2004. Ninth International Symposium on Computers And Communications (IEEE Cat. No.04TH8769)
The purpose of Resource Management is the efficient and effective use of network resources, for i... more The purpose of Resource Management is the efficient and effective use of network resources, for instance bandwidth. In this article, a connection oriented network scenario is considered, where a certain amount of bandwidth is reserved for each Label Switch Path (LSP), which is a logical path, in a MPLS or GMPLS environment. Assuming there is also some kind of admission control (explicit or implicit), these environments typically provide Quality of Service (QoS) guarantees. It could happen that some LSPs become busy, thus rejecting connections, while other LSPs m q be underutilised. We propose a distributed lightweight monitoring technique, based on threshold values, the objective of which is to detect congestion when it occurs in an LSP and activate the corresponding alarm which will trigger a dynamic bandwidth reallocation mechanism.
Data-Driven Policymaking Week Data Driven Policymaking Week wants to unite policymakers, public a... more Data-Driven Policymaking Week Data Driven Policymaking Week wants to unite policymakers, public administrators, decision makers, and social science researchers around the four pilot use cases at the heart of the Policy Cloud project. Spread across Bulgaria, Italy, Spain, and the United Kingdom, these pilot use cases: • Serve as demonstrators for data-driven policy management • Model and showcase best-practice methodologies for engaging communities During the week 26-29 April 2021, four webinars were hosted by Policy Cloud consortium technology partners and experts from the Policy Cloud Impact Creation Board. Each webinar focused on one of pilot use cases. The purpose of the webinars was to introduce the pilot use cases and present the technology solutions being developed to address each one's policymaking challenges and foster wider adoption. Each session described the pilot's use case, Technology solutions provided by Policy Cloud, the importance of each pilot for the wider context of European policymaking and innovation. This report explains the added value of Policy Cloud for data-driven policymaking by focusing on the four highly distinct Policy Cloud pilot cases, each dealing with different challenges, all addressed by the project's innovative cloud solution tailored to each pilot's requirements. The report provides policymakers with examples and recommendations to address policymaking challenges in their own organisations through The European Cloud for data-driven policy management will provide integrated reusable models and analytical tools, turning raw data into valuable and actionable knowledge towards efficient policymaking.
Reduce occurrence of radicalisation by early identifying warning signals and risks from social me... more Reduce occurrence of radicalisation by early identifying warning signals and risks from social media and other data sources Promote secure access to public spaces for more people, enriching their perception of security and safety. Encourage citizen engagement and trust in the perceived legitimacy of public authorities (municipalities, regions, LEAs)
EDULEARN Proceedings, 2018
EDULEARN18 Proceedings, 2018
Research shows that primary school teachers find it hard to select good educational games, and to... more Research shows that primary school teachers find it hard to select good educational games, and to find out how they can integrate these games in learning activities in the classroom to optimize learning for all pupils. Therefore, our research focuses on clarifying how to integrate digital games in the classroom. We conducted a design-based research in 4 primary schools in Flanders, involving 10 teachers and about 200 pupils. After analyzing the current situation, teacher design teams were put together for the co-design of learning activities integrating digital games. After an evaluation we iteratively improved these learning activities. This procedure led to 10 good practices and 4 design guidelines, that can help future teachers when developing learning activities with games.
Adobe recomienda que se utilice Adobe Reader o Adobe Acrobat versión 8 o posterior para trabajar ... more Adobe recomienda que se utilice Adobe Reader o Adobe Acrobat versión 8 o posterior para trabajar con los documentos del Paquete PDF. Si actualiza a la versión más reciente, disfrutará de las siguientes ventajas: • Excelente visualización de archivos PDF • Facilidad de impresión • Rapidez en las búsquedas Si no dispone de la última versión de Adobe Reader, haga clic aquí para descargar la última versión de Adobe Reader Si ya dispone de Adobe Reader 8, haga clic en un archivo del Paquete PDF para verlo.
IEEE International Conference on Communications, 2006
TCP flows from applications such as the web or ftp are well supported by a Guaranteed Minimum Thr... more TCP flows from applications such as the web or ftp are well supported by a Guaranteed Minimum Throughput Service (GMTS), which provides a minimum network throughput to the flow and, if possible, an extra throughput. We propose a scheme for a GMTS using Admission Control (AC) that is able to provide different minimum throughput to different users and that is suitable for "standard" TCP flows. Moreover, we consider a multidomain scenario where the scheme is used in one of the domains, and we propose some mechanisms for the interconnection with neighbor domains. The whole scheme uses a small set of packet classes in a core-stateless network where each class has a different discarding priority in queues assigned to it. The AC method involves only edge nodes and uses a special probing packet flow (marked as the highest discarding priority class) that is sent continuously from ingress to egress through a path. The available throughput in the path is obtained at the egress using measurements of flow aggregates, and then it is sent back to the ingress. At the ingress each flow is detected using an implicit way and then it is admission controlled. If it is accepted, it receives the GMTS and its packets are marked as the lowest discarding priority classes; otherwise, it receives a best-effort service. The scheme is evaluated through simulation in a simple "bottleneck" topology using different traffic loads consisting of "standard" TCP flows that carry files of varying sizes. The results prove that the scheme guarantees the requested throughput to accepted flows and achieves a high utilization of resources.
Proceedings of the 2005 ACM conference on Emerging network experiment and technology - CoNEXT'05, 2005
We present AntNet-QoS, a novel approach for Quality of Service routing which allows dynamic sched... more We present AntNet-QoS, a novel approach for Quality of Service routing which allows dynamic scheduling and forwarding among multiple packet classes in a differentiated service (DiffServ) network. The algorithm takes inspiration from the Ant Colony Optimization framework, and in particular from AntNet, which is an adaptive routing algorithm for best effort traffic. We show through simulations that the proposed scheme, which is purely proactive and does not use any form of bandwidth reservation, can provide very good performance in terms of end-to-end delay, throughput and jitter, and can obtain a good differentiation between classes.
One of the key problems facing designers of Network Management Systems is that of scalability. Du... more One of the key problems facing designers of Network Management Systems is that of scalability. Due to the special characteristics associated with network management, the scalability issues of such systems are different to those of traditional client/server systems; a network management systems must operate continuously with a high reliability (in the order of 99.999%) and within very varied at strict timescales. At the limits, responding to time critical events such as fault restoration, responses in the order of sub millisecond are required. This paper discusses the different issues that affect scalability in distributed systems and then presents a formulation to calculate the scalability of a particular class of distributed systems know as AntNet (routing in communications networks based on ant colony systems) that can be applied in a network management role. Additionally, the paper presents the relative performance of AntNet when applied to a number of network topologies which sh...
Recent advances in …, 2004
Recent Advances in Artificial Intelligence Research and Development 285 J. Vitria et ai (Eds. 1 I... more Recent Advances in Artificial Intelligence Research and Development 285 J. Vitria et ai (Eds. 1 IOS Press. 2004 MAntS.. Hoc: A Multi.. agent Ant.. hased System for Routing in Mobile Ad Hoc Networks Liliana CARRILLO", Jose L. MARZO", Pere VILA", Cesar MANTILLA" ...
Proceedings of the …
... Our proposal is based on the so-called AntNet routing algorithm, an ant-based algorithm devel... more ... Our proposal is based on the so-called AntNet routing algorithm, an ant-based algorithm developed by G. Di Caro and M. Dorigo, where ... the destination node is i. These values are calculated according to the information (delay) gathered by forward ants and modified by taking ...
Lecture Notes in Computer Science, 2004
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Papers by Liliana Carrillo