A performance analysis of the slotted ring protocol for a voice/data integrated network environment

A performance analysis of the slotted ring protocol for a voice/data integrated network environment is presented. At each node two types of packet generation (data and voice) are assumed and a model to provide dedicated buffers for storing each type of packet is constructed. Packet transmission is performed according to the slotted ring protocol with priority given to the voice packets. In particular, an on‐off model reflecting real behavior for the generation of voice packets is defined and finite capacities for the packet buffers are assumed to allow for the calculation of buffer overflow probabilities. In communication systems that handle voice packets, receiving nodes are normally equipped with buffers for accommodating the delays in packet transmission to prevent degradation of audio quality, although excessive delays can cause packets to expire and be discarded. This paper provides for the analysis of the rate at which voice packets are discarded at such nodes and discusses in detail the performance of voice packet transmission. the analysis of this model is based on the method of the equilibrium point analysis. the accuracy of these results are verified by comparing them with the results of simulation. Furthermore, one example of an application of these findings is to examine the effects of changing slot lengths on the performance of a network.