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Multipath Streaming in Best-Effort Networks |
| Roger P. Karrer, Thomas Gross, Multipath Streaming in Best-Effort Networks, Proceeding of IEEE ICC'03, May 2003. [ICC_2003.pdf ICC_2003.ps ICC_2003.ps.gz] |
| Multipath streaming is used by resource intensive applications to stream th eir data over multiple, disjoint paths, thereby cumulating the resources of the different subpaths. The trend towards application-layer implementations of communication protoc ols allows the deployment of a multipath streaming protocol in the current Inte rnet. However, because resource availability fluctuates in the Internet, a multipath strea ming protocol must be combined with other mechanisms, e.g., adaptation, to address these fluctuations. This paper describes two approaches to combine adaptation and multipath streaming. The first approach separates the two mechanisms and th ereby allows multipath streaming to be transparent to the application, whereas the other approach combines the two mechanisms in the application context. This paper compares the two approaches along various parameters. It shows t hat the first approach is easier to deploy from an engineering point of view, but the separation of multipath streaming and adaptation yie lds significant drawbacks. Especially, synchronization problems due to differen t latencies along the paths that form the multipath setup may lead to a significant drop in the quality of the data. |
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