208 research outputs found
EVEREST IST - 2002 - 00185 : D23 : final report
Deliverable pĂşblic del projecte europeu EVERESTThis deliverable constitutes the final report of the project IST-2002-001858 EVEREST. After its successful completion, the project presents this document that firstly summarizes the context, goal and the approach objective of the project. Then it presents a concise summary of the major goals and results, as well as highlights the most valuable lessons derived form the project work. A list of deliverables and publications is included in the annex.Postprint (published version
Statistical Learning in Automated Troubleshooting: Application to LTE Interference Mitigation
This paper presents a method for automated healing as part of off-line
automated troubleshooting. The method combines statistical learning with
constraint optimization. The automated healing aims at locally optimizing radio
resource management (RRM) or system parameters of cells with poor performance
in an iterative manner. The statistical learning processes the data using
Logistic Regression (LR) to extract closed form (functional) relations between
Key Performance Indicators (KPIs) and Radio Resource Management (RRM)
parameters. These functional relations are then processed by an optimization
engine which proposes new parameter values. The advantage of the proposed
formulation is the small number of iterations required by the automated healing
method to converge, making it suitable for off-line implementation. The
proposed method is applied to heal an Inter-Cell Interference Coordination
(ICIC) process in a 3G Long Term Evolution (LTE) network which is based on
soft-frequency reuse scheme. Numerical simulations illustrate the benefits of
the proposed approach.Comment: IEEE Transactions On Vehicular Technology 2010 IEEE transactions on
vehicular technolog
Towards Self-evolving Context-aware Services
The introduction of new communication infrastructures such as Beyond 3rd Generation
(B3G) and the widespread usage of small computing devices are rapidly
changing the way we use and interact with technology to perform everyday tasks.
Ubiquitous networking empowered by B3G networking makes it possible for mobile
users to access networked software services across continuously changing heterogeneous
infrastructures by resource-constrained devices. Heterogeneity and devices'
limitedness, create serious problems for the development and dynamic deployment
of mobile applications that are able to run properly on the execution context and
consume services matching with the users' expectations. Furthermore, the everchanging
B3G environment calls for applications that self-evolve according to context
changes. Out of these problems, self-evolving adaptable applications are increasingly
emerging in the software community. In this paper we describe how
CHAMELEON, a declarative framework for tailoring adaptable applications, is being
used for tackling adaptation and self-evolution within the IST PLASTIC project
Multinet : enabler for next generation enterprise wireless services
Wireless communications are currently experiencing a fast migration toward the beyond third-generation (B3G)/fourth generation (4G) era. This represents a generational change in wireless systems: new capabilities related to mobility and new services support is required and new concepts as individual-centric, user-centric or ambient-aware communications are included. One of the main restrictions associated to wireless technology is mobility management, this feature was not considered in the design phase; for this reason, a complete solution is not already found, although different solutions are proposed and are being proposed. In MULTINET project, features as mobility and multihoming are applied to wireless network to provide the necessary network and application functionality enhancements for seamless data communication mobility considering end-user scenario and preferences. The aim of this paper is to show the benefits of these functionalities from the Service Providers and final User point of view
Daidalos: An Operator and Scenario driven Integrated Project
Beyond 3G networks have to deal with the
integration of multiple differen requirements, besides technological aspects. Most especially business perspectives, and user requirements, are essential from the telecommunications operator point of view. .
This paper describes the formal path of an operator and scenario driven approach used within the Daidalos project in order to develop a Beyond 3G network architecture and to verify these technical developments by proof-of concept demonstrations
A Reference Model for Service Oriented Middleware
From the software engineering perspective, the notion of Service Oriented Architecture (SOA) has been receiving significant attention within the software design and development community. This attention has led to the proliferation of conflicting characterizations of SOA, resulting in an ambiguous understanding of SOA entities and relationships among them. To achieve a common understanding, OASIS and SeCSE propose reference models that introduce a comprehensive ontology for modeling software services around the well known service-oriented interaction pattern. However OASIS and SeCSE models abstract the actual interaction pattern runtime support, which is generally provided by a Service Oriented Middleware (SOM). In this paper we propose a reference model for architecting SOM solutions over next generation networking environment and evaluate it by designing a conforming lower-level model for the SOM developed for the PLASTIC project
Autonomous functionalities for cognitive radio
This paper provides an overview on the research activities in autonomous
functionalities for cognitive radio and networks, carried out in FP7/E3-project. The
identified main research areas within this topic include opportunistic spectrum access
and autonomous self-x functionalities for communication nodes. Opportunistic
spectrum access delineates innovative topics concerning distributed cooperative
spectrum sensing, collaborative MAC algorithms, distributed radio resource
management algorithms, and control mechanisms for the opportunistic spectrum
access. In autonomous self-x functionalities the research covers cognitive device
management, autonomous RAT and operator selection and self-x features for
autonomous elements, including autonomous decision making functionalities for
RAT protocol configuration, negotiation on missing RAT protocol components, and
functionality for dynamic configuration of RAT protocol components.Postprint (published version
PLASTIC: Providing lightweight & adaptable service technology for pervasive information & communication
International audienceThe PLASTIC project adopts and revisits serviceoriented computing for Beyond 3rd Generation (B3G) networks, in particular aiming at assisting the development of services targeted at mobile devices. Specifically, PLASTIC introduces the PLASTIC platform to enable robust distributed lightweight services in B3G networking environments through: • A development environment for the thorough development of SLA- and resource-aware services, which may be deployed on the various networked nodes, including handheld devices; • A service-oriented middleware leveraging multiradio devices and multi-network environments for applications and services deployed on mobile devices, further enabling context-aware and secure discovery and access to such services; • A validation framework enabling off-line and online validation of networked services regarding functional and non-functional properties
A cross-layer mobility management framework for next-generation wireless roaming
Word processed copy.Includes bibliographical references (leaves 62-64).This thesis proposes a mobility management framework that aims to provide a framework for advanced mobility algorithms that allows the challenges of next-generation roaming to be met. The framework features tools that gather context and content information, guarantee low-level QoS, provide security, and offer link and handoff management. The framework aims to be scalable and reliable for all-IP heterogeneous wireless networks whilst conforming to 4G service requirements
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