一种面向查询的无线传感器网络混合型数据存储算法

A Query-oriented Hybrid Data Storage for Wireless Sensor Networks

提出了一种面向数据查询的混合型的数据存储算法,将数据存储在合适的位置。通过分析采集、存储、查询节点之间的位置关系,存储模式可在集中存储和分布存储之间相互切换。本算法引入了"热点"保护机制,可有效均衡网络能耗。实验结果表明,该算法的能耗均衡性、节点能耗、生命周期和丢包率相比于GHT(Geographic Hash Table)算法有一定的改善。

In order to store data at the most suitable querying location, a hybrid data storage algorithm is pro- posed for wireless sensor networks. Firstly, the relationship between the location of acquiring node, storage node and sink node is analyzed. Then, storage method can switch between the external storage and data-centric storage. The algorithm based on ＂hot spot＂ protecting method can balance the total energy consumption. Compared with GHT, the simulation results show that the algorithm can obtain better performance in terms of the balancing of energy con- sumption, total energy consumption, network lifetime and packet loss rate.