Dynamic bandwidth allocation protocol for hierarchically compressed video in ATM networks

In this paper, a dynamic bandwidth allocation algorithm based on renegotiation of the QoS parameters of scalable hierarchical coded video is proposed. The VBR video is very bursty in nature as result of the encoding technique and the peak bit rate value could become very important compared to the average bit rate. To control the burstiness of such applications a renegotiation process of the application´s QoS with the network is needed. The main idea in our algorithm is the use of hierarchical multilevel QoS profile for those applications flexible enough to accept dynamic adjustment of their QoS requirement during connection lifetime. The online predictors are used to forecast the future required bandwidth. In our proposed algorithm, even if the prediction process for more resources cannot be provisioned, the application can gracefully degrade its QoS and consequently the bandwidth requirement based on the currently available resources.