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An extended priority data partition scheme for MPEG video connections over ATM

Transmission of compressed video over ATM networks requires efficient data priority partition techniques. In association with intelligent cell discard schemes, these techniques aim to minimize the loss probability of critical information in the situation of congestion. We propose a new video-oriented priority data partition mechanism named the extended priority assignation scheme (ExPAS). This mechanism better uses the cell header and allows the definition of up to three service classes per connection. To evaluate its performance, we have also designed an adaptive cell dropping scheme which takes benefits of the new features. In comparison with previous priority partition techniques based on the cell loss probability (CLP) mechanism, ExPAS with the adaptive selective cell discard (A-SDC) scheme shows better results in minimizing cell losses of intra-coded frames.