Research: Congestion control protocols for interconnected LANs supporting voice and data traffic
Computer Communications
Research: A simulation study of enhanced arbitration methods for improving Ethernet performance
Computer Communications
Research: Skipping protocols integrating voice and data on a token bus LAN
Computer Communications
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Using simulation, a network-independent framework compares the performance of contention-based Ethernet and two contention-free round-robin schemes, namely Expressnet and the IEEE 802.4 token bus. Two priority mechanisms for voice/data traffic on round-robin networks are studied: the alternating-rounds mechanism of the Expressnet, and the token rotation timer mechanism of the token bus, which restricts access rights based on the time taken for a token to make one round. It is shown that the deterministic schemes almost always perform better than the contention-based scheme. Design issues such as the choice of minimum voice packet length, priority parameters, and voice encoding rate are investigated. An important aspect that is noted is the accurate characterization of performance over a wide region of the design space of voice/data networks