A Distributed Storage Model for Sensor Networks

摘要

In this paper we present a novel efficient, simple, local, memoryless and deterministic storage aggregation model for large wireless sensor networks (WSNs). Our goal is to maximize the system storage utilization. While normally most of WSN systems have a vast amount of global storage reserves, their storage capacity may not be fully explored due to the fact that each sensor individually has a very limited low storage capacity. We suggest an aggregated storage model that overcomes this drawback of low individual storage capacity. Our model constructs "on-demand" distributed storage chains (DSCs) which search for available un-occupied storage space inside WSNs. Those chains are constructed via deterministic geographic walks; however, their behavior resembles random walks. Simulation has revealed that the proposed storage distribution model is capable of maximizing utilization of WSN storage capacity as well as maintaining network loads geographically uniformly distributed.