Random Network Coding in Wireless Sensor Networks: Energy Efficiency Via Cross-Layer Approach

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Executive Summary

The application of Network Coding (NC) in Wireless Sensor Networks (WSNs), where each node broadcasts its information to all other nodes, is considered. Traditionally, this all-to-all broadcast is implemented by letting each node store and forward received packets. In the NC-based approach, each node overhears packets transmitted from neighbouring nodes, combines the received packets, and forwards the resulting packet to its neighbours. The hope is to need fewer transmissions, which helps to save energy. In this paper, the authors study the NC-based all-to-all broadcast assuming all inter-user channels are slow fading and reception energy is comparable to transmission energy.

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