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Wireless network is now an interesting area of research. In this paper the authors are giving a comparative study of COPE and DCAR the two main network coding systems in wireless network; both give high throughput gain in wireless network. COPE mix packets from different sources to increase information content of each transmission. It takes into advantage the broadcast nature of wireless network. COPE is the first practical wireless network coding system. DCAR, the first distributed coding-aware routing mechanism can be seen as a variant of COPE. It in co-operate the features of COPE plus some extra features. This paper gives the similarities, variations, advantages and disadvantages of both COPE and DCAR.
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