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Traditional approaches to transmit information reliably over an error-prone network employ either Forward Error Correction (FEC) or retransmission techniques. In this paper the authors consider an application of network coding to increase the bandwidth efficiency of reliable broadcast in a wireless network. In particular, the authors propose two schemes which employ network coding to reduce the number of retransmissions as a result of packet losses. The proposed schemes combine different lost packets from different receivers in such a way that multiple receivers are able to recover their lost packets with one transmission by the source. The advantages of the proposed schemes over the traditional wireless broadcast are shown through simulations and theoretical analysis.
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