Abstract
A collaborative multimedia environment (CME) allows users to works remotely on common projects by sharing applications (e.g. CAD tools, text editors, white boards) and simultaneously communicate audiovisually. Several dedicated applications (e.g. MBone tools) exist for transmitting video, audio and data between users. Due to the fact that they have been developed for the Internet, which does not provide any quality of service (QoS) guarantee, these applications do not or only partially support specification of QoS requirements by the user. In addition, they all come with different user interfaces. In this paper, we first discuss the problems that we experienced both at the host and network levels when executing a multimedia application and varying its resource requirements. We then present the architectural details of a CME that we have been developing in order to help a user to set up and control a collaborative multimedia session.
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