DISTRIBUTED BACKUP SCHEME FOR DELAYED REPORT IN WIRELESS SENSOR NETWORKS

摘要

In delay-tolerant wireless sensor networks, reporting data from a source node to a sink may be delayed to satisfy some criterion, for example, high energy-efficiency, low algorithm complexity and so on. Data sensed in such networks accumulate on a sensor node during time delayed. It means that even a single failed node may cause a massive-data loss. This paper proposes a backup scheme to minimize data losses caused by failed nodes in wireless sensor networks using the delayed report. The proposed scheme preserves data and consumes small energy by backuping a single data to multiple nodes that exist in the one-hop distant of the source node. Simulation certified that such approach safely preserve data and consumes small energy.