International Journal of Computer Science and Management Studies (IJCSMS)
Sensor networks consist of micro sensors for monitoring and interacting with the physical world. There exist many exciting sensor network applications, including smart learning, battlefields environmental monitoring and control target detection and tracking roadway safety warning etc. These applications are expected to have strong economic influence in the near future. Nevertheless, sensor networks pose many new challenges. One of the challenges is how to store data efficiently to facilitate user query and on-demand warning1 across the entire sensor network. The challenge is significant due to the per sensor resource constraints (limited battery, memory and bandwidth, etc).