Nuno Carapeto

Context-aware control for personalized multiparty sessions in mobile multihomed systems

Telecommunication and Internet services are constantly subject to changes, seeking customers satisfaction. Enriching services with innovative approaches such as context-aware, mobile, adaptable and interactive mechanisms, enables users to experience personalized services seamlessly across different technologies. Aiming at evolving mobile multimedia multicasting to exploit the increasing integration of mobile devices with our everyday physical world, a context-aware multiparty delivery needs to research into two important frameworks: context detection and distribution and context-aware multiparty networking, encompassing adaptations at the session, transport, and network layers. The paper diverges into the second by focusing on the user perceived Quality of Experience and efficient network support of real-time group communications, allowing dynamic adaptation of the multiparty delivery, group communications optimization and maximization of group members overall satisfaction.

Architecture for context-aware multiparty delivery in mobile heterogeneous networks

Future networks are envisioned to satisfy the user needs and improve their quality of experience. This requires the networks to support context-aware information, where context of the user, session, network and environment will greatly influence the way the session is delivered: new approaches are required to deal with the overall context information and network reaction to constantly context changes. This paper presents a context-aware architecture that provides delivery of multiparty services in heterogeneous and mobile environments. The architecture, its elements and functionalities are described through a specific application to a context-driven use case scenario. We show that this architecture is able to provide personalized and multiparty services to the users, addressing their characteristics and preferences, and optimizing network support while mobility and heterogeneous environments are in place.

Context-Aware Self-optimization in Multiparty Converged Mobile Environments

The increase of networking complexity requires the design of new performance optimization schemes for delivering different types of sessions to users under different conditions. In this scope, special attention is given to multi-homed environments, where mobile devices cross areas with overlapping access technologies (Wi-Fi, 3G, WiMax). In such scenario, efficient multiparty delivery depends upon the grouping operation (creation of a set of users to receive a given session), which must be done based on several parameters. We propose sub-grouping of content-based service groups, so that the same service session can be delivered using different codings of the same content, to adapt to the current network, users, session and environment context. The context-aware information is used to improve the sub-grouping process. This paper aims to describe these sub-grouping techniques, in particular how they improve network performance and user experience in the future Internet, in the scope of cognitive autonomic networks.

Session and Network Support for Autonomous Context-Aware Multiparty Communications in Heterogeneous Mobile Systems

The increase of networking complexity requires the design of new performance optimization schemes for delivering different types of sessions to users under different conditions. In this regard, special attention is given to multi-homed environments, where mobile devices cross areas with overlapping access technologies Wi-Fi, 3G, WiMax. In such a scenario, efficient multiparty delivery depends upon the grouping operation, which must be done based on several parameters. In this paper, the authors propose context-aware sub-grouping of content-based service groups so that the same service session can be delivered using different codings of the same content, adapting to current network, users, session, and environment context. The context-aware information is used to improve the sub-grouping process. This paper aims to describe these sub-grouping techniques, and in particular how they improve network performance and user experience in the future Internet by focusing on the improved network-level and session-level mechanisms.

Context-Aware Multimedia Distribution for Multiparty Communications

The increasing attractiveness of multimedia group communications forces Mobile Operators to provide more useful services and to evolve their networking technologies to effectively distribute rich-media content to mobile communities. Context information shall have a highlight role on next generation networks when dealing with communications’ groups such as the ones target by MBMS and E-MBMS systems. Users’ situation information shall be used to increase the system effectiveness while augmenting the user experience. This paper proposes a convergent context-aware architecture where IMS is used to convey context information and to control MBMS and E-MBMS multimedia channels allowing Mobile Operators to easily offer innovative services over efficient networks.

Pervasive multiparty delivery framework for ubiquitous multimedia services

Multimedia services are rapidly growing in interest with the increase of available bandwidth on core and mobile technologies. There is a business opportunity for both adaptability and personalization of services centralized in users and their surrounding environment. Context Awareness requires the network to support mechanisms that are able to get information from the user situation as location, activity, presence, velocity, preferences, surrounding noise, etc., and triggering session modification and network control mechanisms. Context awareness provides a new trend in pervasiveness since it allows a full, but unconscious interaction between users, operators and service providers. This paper presents the results, from simulation and demonstrator implementation, of an architecture that enables context-aware and personalized multiparty multimedia content delivery, independently of the underlying access and transport technologies.