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In-Depth Information
2-way
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File object
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3-way
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n-way
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FIGURE 5.9: Different feasible forms of exchanges [Anagnostakis and Green-
wald, 2004].
5.2.2 Media Streaming Systems
In this section, we describe several interesting techniques for providing
incentives in a P2P media streaming environment. Broadly speaking, there
are two different structures employed in P2P media streaming: asynchronous
layered streaming and synchronous multicast streaming.
5.2.2.1
Layered Many-to-One Streaming
Xu et al. [Xu et al., 2002] proposed a fully distributed differentiated ad-
mission control protocol called DAC
p2p
. In this model, each requesting peer
needs multiple supplying peers to send different layers of media data. That is,
from a topological perspective, each streaming session involves one single re-
cipient and multiple sources, structured as a two-level inverted tree network.
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