Recently, some push-pull scheduling strategies have been proposed to replace the pull mechanism in mesh based P2P streaming systems. A push-pull mechanism is more efficient in terms of the overheads and leads to a much better playback delay performance since the pull part is mainly used either at startup or to recover lost content. In this work we combine the low scheduling delays of push scheduling with the resiliency and multi-parent ability of mesh overlays. We propose a pure push scheduling strategy, PurePush, where we replace the pull mechanism by a probabilistic push: Parents of a node push a packet with a relaying probability in order to reduce redundancy. Through simulations, we show that PurePush outperforms, with respect to playback delays, a typical push-pull strategy in the realistic situation where we consider packet loss.
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