The dynamic packet reservation multiple access scheme for multimedia traffic

The performance of dynamic packet reservation multiple access (DPRMA), which was introduced in previous publications, is investigated. In particular, we show here how the DPRMA scheme integrates three different traffic types: voice, video, and data, through a single access control mechanism that permits users to specify their immediate bandwidth requirements. The primary feature of the DPRMA is the dynamic matching of the traffic source generation rates with the assigned fraction of the channel capacity. This is accomplished by a multiple-threshold-driven control algorithm with hysteresis that regulates the actual amount of channel capacity assigned to users. We discuss how the multiple thresholds are selected for the three traffic types and demonstrate the improvement of the DPRMA mechanism in increased throughput and reduced number of collisions.