Packet allocation for layered media transmission with path diversity
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Date
2003-11-01T00:00:00Z
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Abstract
Media streaming with path diversity can improve the quality of the stream received by reducing the variability of packet loss and delay in best-effort networks. In this paper, we show that the decision of which packets to send over which paths can greatly affect the quality of the streams received. We propose a general framework for analyzing transmissions of layered media stream with single sender, single receiver over two disjoint paths. Our analytical framework solves the following problem: Given a set of packets, dependencies between them and the aracteristics of the paths, how to distribute the packets over the paths (with possibility of duplications) to minimize the loss amount of useful data during transmission? Three different models to represent layered media are described and analyzed. We describe polynomial algorithms for finding optimal packet allocations in each model. Our results are significantly better than heuristic and packet allocation scheme used in previous work.