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How practical is network coding-英文文献.pdf

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How practical is network coding-英文文献

How Practical is Network Coding? Mea Wang, Baochun Li Abstract— With network coding, intermediate nodes between downloads.” In particular, with respect to the computational the source and the receivers of an end-to-end communication overhead of network coding, the conclusion was drawn from session are not only capable of relaying and replicating data the observation that each of the clients only consumes about messages, but also of coding incoming messages to produce coded outgoing ones. Recent studies have shown that network coding is 20% – 40% of its CPU throughout the session. This work, beneficial for peer-to-peer content distribution, since it eliminates however, did not make any comparisons between using and the need for content reconciliation, and is highly resilient to peer not using network coding for content distribution. failures. In this paper, we present our recent experiences with a Despite recent efforts of studying the practicality of apply- highly optimized and high-performance C++ implementation of ing network coding in peer-to-peer networks, there are still randomized network coding at the application layer. We present our observations based on an extensive series of experiments, no clear and well-justified answers to the following question: draw conclusions from a wide range of scenarios, and are more Given a content distribution session in peer-to-peer networks, cautious and less optimistic as compared to previous studies. is network coding indeed able to offer a better throughput — best measured in the time to comple

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