V-EYE A Very Large Scale Virtual Environment for multimedia conferencing
نویسندگان
چکیده
This paper describes a prototype application named V-eye that implements a Large Scale Virtual Environment (LSVE), combining a 3D world, textual messages, multimedia communications and High Definition video. When developing V-eye, our primary goal was to create a platform suitable for easily experimenting multimedia transmission, with a large number of participants, and on heterogeneous IP networks, e.g. combining a very powerful backbone such as VTHD, together with wired LANs, as well as WLANs in the IEEE 802.11 family. In particular, this platform is very useful for evaluating the scalability of transmission protocols and the support of differentiated services for multimedia applications. V-eye uses the Score communication architecture. In this approach, agents perform a real-time mapping of the geographic area into spatial areas whose sizes depend on the density and location of participants; each of these cells is associated with a multicast group. In this way, each participant can focus on his area of interest, and receive only the relevant traffic. Key-words: multimedia conferencing, IP multicast, scalability, virtual environment, RTP reflector, High Definition Video ∗ INRIA Sophia Antipolis, [email protected] † INRIA Sophia Antipolis, [email protected] ‡ INRIA Sophia Antipolis, Thierry [email protected] § FT R&D Lannion, [email protected] V-eye Un environnement virtuel à très grande échelle pour la conférence multimédia Résumé : Nous présentons dans ce papier une application expérimentale baptisée V-eye qui implémente un monde virtuel à très grande échelle, et qui combine un monde en 3D, des messages textuels, des communications multimédia et la Vidéo Haute Définition . Ce développement a pour but principal de créer une plateforme qui permette d’expérimenter commodément des transmissions multimédia avec un grand nombre de participants et sur des réseaux hétérogènes, avec par exemple une dorsale très rapide comme VTHD, des résaux locaux filaires ou sans fil de la famille 802.11. En particulier, cette plateforme est très utile pour évaluer les capacités de passage à l’échelle des protocoles de transmission, et le support de services différenciés pour les applications multimédia. V-eye repose sur l’architecture de communication Score. Dans cette approche, des agents assurent le découpage en temps réel de la zone géographique en zones dont la taille dépend de la position et de la densité des participants; chacune de ces cellules est associée à un groupe multicast. De cette manière, chaque participant peut se concentrer sur sa zone d’intérêt, et ne recevoir que le trafic correspondant. Mots-clés : conference multimédia, multicast IP, passage à l’échelle, environnement virtuel, réflecteur RTP, vidéo haute définition The V-eye Very Large Scale Virtual Environment 3
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