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International audience; Semantic technologies have recently gained significant support in a number of communities, in particular the IoT community. An important problem to be solved is that, on the one hand, it is clear that the value of IoT increases significantly with the availability of information from a wide variety of domains. On the other hand, existing solutions target specific applications or application domains and there is no easy way of sharing information between the resulting silos. Thus, a solution is needed to enable interoperability across information silos. As there is a huge heterogeneity regarding IoT technologies on the lower levels, the semantic level is seen as a promising approach for achieving interoperability (i.e. semantic interoperability) to unify IoT device description, data, bring common interaction, data exploration, etc.

International audience; This paper is co-authored by an informal group of experts from a broad range of backgrounds, all of whom are active in standards groups, consortia, alliances and/or research projects in the Internet of Things (IoT) space. This paper has two objectives: 1) explain the need for semantic interoperability, 2) provide recommendations for semantic interoperability standards using ontologies. The target audience for this paper are: ● IoT system product owners who need to understand how they can effectively ensure interoperability of their products. ● IoT system and standardization engineers without background in semantic technologies. The document is made available under the ​Creative Commons Attribution 4.0 International License​.

Commercial users of modern communications networks have benefited from a huge progress of the related technologies. However, Public Safety Networks (PSNs) and devices did not follow the same trend. Very often, they still rely on voice or low speed data communications, tempting first responders to use their own private devices when they need to exchange real-time video or geolocation information. Under this consideration, national authorities and specialized organizations have recently initiated the integration of more recent technologies, such as cellular Long Term Evolution (LTE), even though they need further developments to cope with the harsh usages that safety personnel may face. This report proposes to move the evolution of these networks towards the recent evolution of networking technologies started with Software Defined networking (SDN) and Network Functions Virtualization (NFV). Based on the requirements derived from a standardized earthquake scenario and a study of the main improvements brought by this network softwarization, it analyzes how SDN and NFV can solve part of the issues raised with commercial LTE and enhance PSN communications. The capabilities of these new technologies are applied to a list of characteristics required by mission-critical networks, e.g., rapid deployment, reliability, security or resilience, taking advantage of features such as the separation between control and data planes or the simplified dynamic resources management. The resulting enhancements are then illustrated using example frameworks published in the literature for Cloud Radio Access Networks, resilient backhaul solution , isolated base stations, SDN-based architecture or Service Function Chaining.

The foreseen explosion in online video traffic over the upcoming years has left current mobile operators struggling to maximize their networks capacity and efficiency. MEDIEVAL project aims to evolve existing architectures through relevant cross-layer interactions, permitting to deliver expected QoE levels to users. In order to alleviate the impact of online video which potentially could be shared by a group of users in the core network, as well as maximize transport efficiency, the utilization of multicast and broadcast mechanisms is proposed. Moreover, the combination of multicast and network-based mobility protocols results in new problems which must be solved necessarily through network support. By using multicasting SVC, where a video is composed by one base layer and possibly multiple dependent enhancement layers, a single session may traverse the whole core and be adapted to the different terminal's characteristics. In this article, we present the research being developed towards mobile multicast support in future networks, describing solutions for improving wireless access efficiency (in 802.11 and LTE), and for enabling IP multicast mobility support. Furthermore, the end-to-end (e2e) support provided by MEDIEVAL in a SVC-based Personal Broadcast Service (PBS) scenario is analyzed, where both mobile multicast listeners and sources participate. The interfaces enhancing mobile video support are examined, along with the key exchanged parameters.

Natural disasters have often made the headlines in the past years. As a consequence, many actions have been started by the public authorities to reduce the damages and the number of casualties. In that objective, the French project RATCOM aims at developing an alert system in case of coastal tsunami. Its downstream components will propose reliable and efficient communication systems to relay the alert. In parallel to the integration of the existing technologies in the project demonstrator, a survey analysis has been performed to identify the communications technologies and networks which are in preparation but not yet operational, and which will increase the efficiency and quantity of individuals reachable by the future population alert networks. Each of these technologies is not sufficient by itself, but their combination will improve drastically the efficiency of the alerting global system.

Recent trends in mobile networking show the large scale emergence of multimode mobile terminals, with the capability to simultaneously or sequentially attach to conceptually different access networks. To cope with this, they require an abstracted framework for mobility management and control. A solution to this issue, called Media Independent Handover Services, is standardized by the 802.21 group of the IEEE. This work has been studied and applied to the case of a B3G operator networks in an EU-funded research project in order to improve seamless handover between heterogeneous technologies. This paper focuses on the integration of the Beyond-3G cellular access technology in this framework, and how it can cooperate with the 802.21 to execute handovers to and from cellular networks. This study has been implemented in an experimental software radio platform which provides a direct inter-connection between the access node and the IPv6 Core Network, very close to the LTE specifications of the 3GPP. We describe here the mapping between a selection of Media Independent Handover primitives and the cellular air interface procedures available in the platform for Mobility, Quality of Service management and Multicast support (MBMS). Finally, we provide some measurements and results obtained after the integration and demonstration of the heterogeneous network framework.

Recent years have witnessed a massive evolution of mobile communications. When no agreement between the network providers exists, changing the attached network still means breaking the session and relying on the application to recover the lost data. In parallel, it is hardly possible for a mobile user to control the connectivity of his terminal. The objective of this thesis is to present the concept of an innovative technological framework for the autonomous control of multimode terminals in heterogeneous and non-federated wireless environments. The aim is to enable a self-configuring terminal to connect and roam seamlessly across independent networks, while respecting its user’s choices and preferences. The target scheme involves abstraction and cross-layer mechanisms. It takes into account constraints based on heterogeneous wireless systems, autonomous architectures and enables generic services such as smart access network selection, connectivity and session management. This scheme applies to the mobile terminal, with mechanisms independent of the network infrastructure. The thesis analyses how existing technologies are enhanced and combined with new features to achieve this objective and gives a description of the overall concept and of its implementation. A simulated model is used to assess the validity of the proposed framework. Diverse applications to real systems that implemented the components of this framework are presented, highlighting the generality and key benefits of the concept., Nous assistons actuellement à une évolution considérable des communications mobiles. En l’absence d’accord entre les fournisseurs, changer son point d’attachement au réseau signifie encore casser la session en cours et dépendre de l'application pour récupérer les données perdues. De même, il n'est guère possible pour un utilisateur mobile de contrôler la connectivité de son appareil. L'objectif de cette thèse est de présenter le concept d'une structure technologique innovante pour le contrôle autonome des terminaux multimodes dans les environnements sans fil hétérogènes et non fédérés. Son but est de permettre à un terminal auto-configuré de se connecter et de se déplacer de manière transparente à travers des réseaux indépendants, tout en respectant les choix et préférences de son utilisateur. Le schéma obtenu implique des mécanismes d’abstraction et inter-couches. Il tient compte de contraintes basées sur les systèmes sans fil hétérogènes, les architectures autonomes, et permet l’exécution de services génériques comme le choix du réseau d'accès et la gestion de la connectivité et des sessions. Ce schéma s'applique au terminal mobile, avec des mécanismes dissociés de l'infrastructure réseau. La thèse analyse comment les technologies existantes sont améliorées et combinées avec de nouvelles fonctionnalités pour atteindre cet objectif, et donne une description de l'ensemble du concept et de sa mise en œuvre. Un modèle simulé est utilisé pour évaluer la validité de la structure proposée. Diverses applications à des systèmes réels mettant en œuvre les éléments de cette architecture sont présentées, faisant ressortir la généralité et les principaux avantages du concept.

International audience; SCORE@F (Système Coopératif Routier Expérimental @ France) est un projet de recherche collaborative, d'expérimentation des systèmes coopératifs routiers s'inscrivant dans un cadre Européen d'expérimentation. Il a pour objet de préparer un déploiement des systèmes coopératifs routiers en Europe, sur tous types d'environnements. Ce projet de 19 partenaires s'inscrit dans le cadre de l'appel à projet du FUI 10 et représente un budget global de 6 millions d'euros. Pôle de Compétitivté Mov'eo.