Dynamic Real-Time Channel Establishment in Multiple Access Bus Networks

Real-time communication with performance guarantees is becoming very important to many applications, like computer integrated manufacturing, multimedia, and many embedded systems. Though several real-time protocols have been proposed for the multiple access bus networks, there is no guarantee based protocol which addresses the problem of integrated scheduling of dynamically arriving periodic and aperi-odic messages. In this paper, we propose two guarantee based protocols, EDF and BUS protocols, which address this problem. In the simulation studies, the performance metrics, success ratio (measure of schedulabil-ity) and channel utilization are used to study the performance of the two protocols. It is observed that the EDF protocol ooers higher schedula-bility as compared to the BUS protocol for periodic messages, while the BUS protocol ooers better channel utilization for aperiodic messages as compared to the EDF protocol.