A pattern system supporting QoS for synchronous collaborative systems

Synchronous collaborative applications have varying demands of network service requirements, such as bandwidth, latency, or in general quality of service (QoS). Based on the number of active members, floor control and focus of attention, the low-level control of parameters can overwhelm the developers of systems. To address this problem we have extended a pattern system for collaborative software development, named COCHI (Collaborative Objects for Communication and Human Interaction), to handle QoS in collaborative systems when the network infrastructure that supports this feature is available. When used, these patterns negotiate changes in QoS when the state of other related objects is updated.