A semantic based pre-fetch scheme for SMIL presentation proxy-delivery

We discuss in this paper an adapted proxy working scheme for SMIL presentation delivery and show how to exploit the casual relations, the time requirements as well as the media characteristics, to deduce a semantic based request pattern. The latter is used to efficiently schedule the pre-fetch requests, as well as the send-back delivery, such that the imposed synchronizations constraints can be met while maintaining the proxy jitter under an acceptable threshold. First results towards validating the pre-fetch scheme are reported.