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The two key benefits of network coding are increased reliability and throughput. Most network coding approaches for wireless networks rely on overhearing neighboring transmissions. Overhearing in sensor networks, however, is not energy-efficient. In this paper, the authors extend GinMAC, a state-of-the-art MAC protocol, applying network coding with limited overhearing. The authors' approach reduces the delay allocating less retransmission slots. Their results show that network coding with limited overhearing reduces the power consumption of GinMAC while maintaining the desired level of reliability.
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