An integrated voice/data traffic model with variable voice service rate

A priority two-queue system, where high-priority customers receive a variable service rate is analyzed. The model can be used as a first approximated analysis for token-ring local-area networks where voice/data integration is accomplished. The voice service rate is variable according to the queue size at the instant the server reaches the voice queue. It is assumed that the larger the number of voice packets found by the server, the higher the voice service rate is. In contrast with other approaches, instead of dropping old voice packets, the proposed scheme can be considered to drop some amount of redundant information, transmitting only the remaining part, depending on the voice queue size. This strategy provides continuity of the voice service (at the price of reducing redundancy) in such a way that the loss of quality is distributed among several voice packets, which results in more regularity in the service