QoS adaptation in multimedia multicast conference applications for e-learning s...

• Autor(es): Deusdado, Sérgio ; Carvalho, Paulo
• Data: 2008
• Identificador Persistente: http://hdl.handle.net/10198/4381
• Origem: Biblioteca Digital do IPB
• Assunto(s): e-learning; Multimedia; Multicast; Adptive multicast
• Tipo de Documento: Parte ou capítulo de livro
• Idioma: Inglês

Descrição

Tolerant real-time applications, such as video conferences, are in the frontline to benefit from QoS adaptation. However, not all include adaptive technology able to provide both end-system and network quality awareness. Adaptation, in these cases, can be achieved by introducing a multiplatform middleware layer responsible for tutoring the applications’ resources (enabling adjudication or limitation) based on the available processing and networking capabilities. Congregating these technological contributions, an adaptive platform has been developed integrating public domain multicast tools, applied to a Web-based distance learning system. The system is user-centered (estudent), aiming at good pedagogical practices and proactive usability for multimedia and networkresources. The services provided, including QoS adapted interactive multimedia multicast conferences (MMC), are fully integrated and transparent to end-users. QoS adaptation, when treated systematically in tolerant real-time applications, denotes advantages in group scalability and QoS sustainability in heterogeneous and unpredictable environments such as the Internet.