Scalable group communication in tightly coupled environments

TL;DRAbstract

This thesis considers aspects of synchronous group communication regarding the scalability with respect to the number of participating users is such scenarios. The goals of the thesis are twofold: 1. Design und development of a scalable conferencing service 2. Modeling groupware scenarios for evaluation In the first part of the thesis, related work in the area of conferencing is presented, e.g. the H.323 standard of the ITU or the approaches of the IETF working groups. The outcome of this presentation is that current systems mainly suffer from bad scalability in terms of participating users or from restrictions of provided functionality. As a consequence, an own approach for a conferencing service is proposed (Scalable Conferencing Control Service, SCCS) following the paradigm of tightly coupled environments, i.e. the system is built of interconnected providers in a tree. Apart from the provision of main conferencing services, a major effort is concentrated on the scalability of the se

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