Date Added: Sep 2012
Disruptive network communication entails transient network connectivity, asymmetric links and unstable nodes, which pose severe challenges to data collection in sensor networks. Erasure coding can be applied to mitigate the dependency of feedback in such a disruptive network condition, improving data collection. However, the collaborative data collection through an in-network erasure coding approach has been underexplored. In this paper, the authors present ONEC, Opportunistic Network Erasure Coding protocol, to collaboratively collect data in dynamic disruptive networks. ONEC derives the probability distribution of coding degree in each node and enable opportunistic in-network recoding, and guarantee the recovery of original sensor data can be achieved with high probability upon receiving any sufficient amount of encoded packets.