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When multiple video streams are transmitted in a wireless mesh network, each stream needs to adapt its rate to the time-varying traffic in the network. The authors propose a media-aware rate allocation algorithm that adjusts the video rate based on both video content and network congestion. This is combined with cross-layer information exchange: the video agent relies on estimated link state at each hop along the path, as well as accumulated congestion increment reported by the routing agent. They discuss in detail how the distributed optimization can be realized at each wireless node, and present simulations of the proposed rate allocation algorithm over an 802.11 wireless mesh network.
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