Towards a Virtualization-based Control Language for SDN Platforms

International audienceSoftware defined networking (SDN) approaches rely on control languages to programmatically express the desired network behavior. Several SDN control languages use network virtualization to abstract the complex and dynamic nature of the physical infrastructure. However, almost all these languages use the same network abstraction model, which we believe is not the most appropriate one for expressing flexible and reusable network control policies. This paper presents work in progress towards a new high-level virtualization-based control language for SDN platforms. The main novelty of this language is to integrate a network abstraction model that explicitly identifies two kinds of virtual units: i) Fabrics to abstract packet transport functions and ii) Edges to abstract richer networking functions. We believe that this approach will allow network administrators to easily express modular and reusable network control policies independently of the underlying infrastructure

QoCIM : A Meta-model for Quality of Context

International audienceIn the last decade, several works proposed their own list of quality of context (QoC) criteria. This article relates a comparative study of these successive propositions. The result is that no consensus has been reached about the semantic and the comprehensiveness of QoC criteria. Facing this situation, the QoCIM meta-model offers a generic, computable and expressive solution to handle and to exploit any QoC criterion within distributed context managers and context-aware applications. For validation purposes, QoCIM is successfully applied to the modelling of a set of simple and composite QoC criteria

AMSDL : Un langage déclaratif dédié à la surveillance adaptative

International audienceDe plus en plus d’attentes portent sur la capacité à pouvoir contrôler finement et dynamiquement l’exécution d’une activité de surveillance de réseaux et systèmes communicants. Afin de faciliter la mise en oeuvre de plans de contrôle d’une activité de supervision, nous proposons, dans cet article, la définition et une implémentation d’un langage dédié à l’expression de stratégies de surveillance adaptative. Le langage AMSDL (Adaptive Monitoring Strategy Description Langage) permet, à des administrateurs de réseaux et de systèmes, ou à des programmeurs de modules logiciels autonomiques, de déclarer à un haut niveau d’abstraction, en plus des ressources à surveiller, la logique de pilotage d’une supervision dynamiquement adaptable aux évolutions des exigence

Interworking QOS Management Subsystem into IMS-Based Architecture Multi Providers: IMS-IQMSMP

International audienceThe third-generation partnership project 3GPP and 3GPP2 have standardized the IP multimedia subsystem (IMS) to provide ubiquitous and access network-independent IP-based services for next-generation networks via merging cellular networks and the Internet. The IP Multimedia Subsystem (IMS) seems to be the technology that will prevail in Next Generation Networks (NGNs). The users wish to communicate through collections of networks using different protocols; rendering service mapping from one network to another with the similar QoS is a complex issue thereby. The heterogeneous networks are collections of communication platforms using different protocols. This heterogeneity implies the need to offer many different services on the market within short time. In this paper we propose a heterogeneous network model based on the IMS that provides guaranteed QoS. Our method presents, in the first, an informational solution. Decisional information is added to the HSS basis to enrich the knowledge base, which is expressed under the form of "profile of QoS R", where the new information informs directly the decisions to be taken according to the user’s profile (preferences QoS and pricing, bandwidth, location ...). In the second, a solution for multi provider’s context which can allow a subscriber to register with one or more operator(s) according to QoS offered. Thirdly, a mechanism which can be deployed in heterogeneous networks to preserve the original QoS values of the user session and thus eliminate the cumulative effect of QoS rounding across the entire communication path. And it is feasible via the “Interworking QoS Management Sub-network” while adding the new interworking management components, namely: SICs, DIC, QPA AS and HSS-PQoSr

Integrating an Online Configuration Checker with Existing Management Systems : Application to CIM/WBEM Environments

National audienceRuntime configuration validation is a critical requirement if we are to build reliable self-adaptive management systems. This paper presents a generic framework that includes a runtime configuration checker built upon a high-level language dedicated to the specification of configurations and validity constraints. In addition, we describe a methodology for using this framework and integrating the configuration checker with existing management systems. In particular, we show how we use the framework to enrich a CIM/WBEM management environment with automatic runtime configuration validation against a defined set of constraints guarding structural correctness and service behavior conformance. Our experiments with management models conforming to the CIM Virtual System profile show viable results demonstrating the feasibility of our approach

Runtime Configuration Validation for Self-configurable Systems

International audienceRuntime configuration validation is a critical requirement if we are to build reliable self-adaptive systems. This paper describes a model-based approach that supports runtime validation of candidate configurations. The approach is based on MeCSV, a metamodel we propose, that allows a technologyneutral specification of systems' configurations and validity constraints. A constraint-checker relying on this specification verifies dynamically candidate configurations before their deployment. Experimental results with a messaging platform show viable validation overhead demonstrating the feasibility of the approach

Generic and adaptable online configuration verification for complex networked systems

International audienceDynamic reconfiguration is viewed as a promising solution for today's complex networked systems. However, considering the critical missions actual systems support, systematic dynamic reconfiguration cannot be achieved unless the accuracy and the safety of reconfiguration activities are guaranteed. In this paper, we describe a model-based approach for runtime configuration verification. Our approach uses model-driven engineering techniques to implement a platform-independent online configuration verification framework that can operate as a lightweight extension for networked systems management solutions. The framework includes a flexible and adaptable runtime verification service built upon a high-level language dedicated to the rigorous specification of configuration models and constraints guarding structural correctness and service behavior conformance. Experimental results with a real-life messaging platform show viable overhead demonstrating the feasibility of our approach

AMSDL: A declarative language for adaptive monitoring control

International audienceMore and more requirements are given on the ability to precisely control at run time the achievement of a network and communicating systems monitoring activity. This paper gives an overview of AMSDL (Adaptive Monitoring Strategy Description Language), which is a language under development dedicated at the expression of adaptive monitoring strategies. AMSDL will provide both the network managers and the software developers of autonomic modules with the capacity to easily declare, more than the resources to be managed, the logics that will govern the dynamic monitoring behavior according to the variations of functional, informational and operational requirements

Extending Ambient Intelligence to the Internet of Things: New Challenges for QoC Management

International audienceQuality of Context (QoC) awareness is recognized as a key point for the success of context-aware computing solutions. At a time where the Internet of Things, Cloud Computing, and Ambient Intelligence paradigms bring together new opportunities for more complex context computation, the next generation of Multiscale Distributed Context Managers (MDCM) is facing new challenges concerning QoC management. This paper presents how our QoCIM framework can help application developers to manage the whole QoC life-cycle by providing genericity, openness and uniformity. Its usages are illustrated, both at design time and at runtime, in the case of an urban pollution context- and QoC-aware scenario

Adaptive Communication Agent for Group Communication activities

14International audienceIn group-wide collaborative environment, managing the adaptive communication is a challenging task. It implies the monitoring of sudden change in the activities while providing a solution to maintain the connection with the available resources. In this work, we design a software agent that supports autonomic computing to ensure reliable communications among the mobile devices and Autonomous Ground vehicles (AAV). This issue is addressed in the context of save and rescue missions carried out during natural disasters such as floods and forest fires by human and voluntary operators within the framework of wireless environment. The paper focuses the autonomic functionalities of the components used to monitor, analyze, plan, and execute the adaptive mechanisms in case of evolution (mission/environment). We distribute this agent among devices and vehicles to ensure the adaptive task and it is tackled by using appropriate policies used to select the decision and executed without manual intervention. This research is applied to a Crisis Management System (CMS) within the context of the French RTRA project (ROSACE)