A New Adaptive Data Distribution Model for Consistency Maintenance in Collaborative Virtual Environments

Cédric Fleury 1 Thierry Duval 1 Valérie Gouranton 1 Bruno Arnaldi 1
1 BUNRAKU - Perception, decision and action of real and virtual humans in virtual environments and impact on real environments
IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, ENS Cachan - École normale supérieure - Cachan, Inria Rennes – Bretagne Atlantique
Abstract : Ensuring that all the users see the same state of a Collaborative Virtual Environment (CVE) at the same time is very important to provide effective collaboration between these users. Absolute consistency is nearly impossible to achieve because it would prejudice the system responsiveness during user interactions. Consequently, existing solutions make a trade-off between consistency and system responsiveness according to their own requirements. We propose a new adaptive data distribution model that is able to dynamically change data distribution according to application requirements, user's actions and functions that virtual objects fulfill in the virtual environment. Our solutions can deal with several kinds of requirements imposed by various applications and network constraints. The choice of the data distribution can be made at the object level because all the objects of a virtual environment do not necessarily have the same need for consistency. Finally, we evaluate this model for collaborative scientific data visualization using a client/server architecture and HTTP/HTTPS connections. The results show that our model can minimize both interaction latency and gap in consistency between users, so it enables users to always perform real-time interactions in a consistent CVE.
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Communication dans un congrès
JVRC 2010 (2010 Joint Virtual Reality Conference of EuroVR - EGVE - VEC), Sep 2010, Fellbach, Germany. 2010
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Cédric Fleury, Thierry Duval, Valérie Gouranton, Bruno Arnaldi. A New Adaptive Data Distribution Model for Consistency Maintenance in Collaborative Virtual Environments. JVRC 2010 (2010 Joint Virtual Reality Conference of EuroVR - EGVE - VEC), Sep 2010, Fellbach, Germany. 2010. 〈inria-00534090〉

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