Data Management of Wireless Sensor Networks

Wireless sensor networks can monitor physical and environmental conditions inexpensively, and the networks have been widely used in military and civilian applications. The sensor nodes in the networks not only have the ability to sense, but also can supply data storage, computation and communicate with each other. However, energy efficiency is the major concern in wireless sensor networks, which usually rely on battery for energy source. Centralized data storage and query processing schemes lead to high energy consumption. This paper proposes a distributed data storage scheme (DDS) that disseminates related event data in a neighborhood in wireless sensor networks. Besides offering data query according to event names, DDS also provides distributed querying. Experimental results show that the DDS scheme yields higher efficiency and effectiveness than the centralized scheme.