A new switch-node architecture for data traffic for integrated services in a Local Area Network (LAN) is proposed. Specifically it has been designed to provide service to the following two broad types of traffic:1. Connectionless service for Interactive Data (ID) traffic.2. Connection-oriented service for Non-Interactive Data (NID) traffic.The topology of the switch-node is a bus. The key feature of the proposed scheme is the <b>centralization</b>, which has been exploited to provide the requisite flexibility for handling every class of traffic. The shared transmission medium is a short high speed bus which enjoys a fundamental advantage relative to distributed approaches in that the propagation delay along the length of the bus is smaller than the transmission time of a single bit. This feature can be exploited to provide simplicity and efficiency in accessing the transmission medium. The performance of the proposed media-access scheme and the centralized scheduling policy for interactive and non-interactive data traffics have been analyzed through simulation. The simulation study shows the actual efficiency of the switch-node, and proves that the proposed concurrent dual buses switch-node architecture with its centralized scheduling policy is a strong candidate to form the core of an efficient ISDN.
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