Most multimedia applications require a predictable communication subsystem.
At the current stage of our research, we focus on three problems. The first direction is to develop schemes for multiaccess networks which can provide performance guarantees. In a multiaccess link environment, a real-time channel of certain grade of quality may be implemented by allocating sufficient link bandwidth to the source node of the channel. The system also takes advantages of multiplexing independent statistical channels. Without compromising performance requirements, we have successfully reduce the link capacity that needs to be reserved for a channel to the average level from the worst case level.