| 摘要 |
A system and process according to the present invention involves tagging prescribed portions of the data of each layer in a layered multicast or layered presentation with an indicator of the importance or utility that the data provides to the receiver. Additionally, the data is tagged with a cost factor involved with sending the data. The aforementioned portions of the data can be an entire data stream of a layer, or some part thereof all the way down to the individual packets making up the stream. The invention also involves determining the optimized scenario for sending the data from the sender to the receiver based on the data tags.
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