Abstract

The performance of three access protocols for ring-shaped local area networks is evaluated in terms of their effectiveness in supporting a packet voice service. The protocols considered are the control token, message slot and buffer insertion. The selection of an optimal packet length that satisfies voice delay requirements is studied. Alternative operating modes of each access protocol are also examined in terms of their contribution to this delay. The paper concludes that, for integrated voice-data networks, the control token and buffer insertion protocols require priority levels to provide voice service with acceptable delay, and the message slot protocol provides a performance worse than the other two access protocols.

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