Flowcode: Multi-Site Data Exchange Over Wireless Ad-Hoc Networks Using Network Coding

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Executive Summary

The authors present FlowCode, a system that exploits network coding at the granularity of traffic flows to facilitate fault-tolerant data exchange in wireless mesh networks. Applications include multi-site data replication in ad-hoc environments such as mesh networks or wireless data centers. By coupling an operand-driven transmission mechanism with a layered network topology, FlowCode allows one to realize the gains of network coding in application systems without a global scheduler. They analyze the resulting gains through modeling and simulation and validate their results on an outdoor testbed of 12 wireless devices. Results indicate that in high loss environments, FlowCode provides the most significant gains from improved fault tolerance over redundant paths.

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