Sensor network has become a newly hot and front research area. It is a subject that combines with sensor technology, embedded computing technology, distributed information processing technology and communication technology, etc. It has been a revolution of information sensing, collecting and processing. More and more attentions have been paid to sensor network for military, academic and industrial use. Wireless sensor networks are envisioned to consist of thousands of devices, operating in an unattended mode, and characterized by severe energy constraints. The unique features of wireless senor networks offer unprecedented opportunities for broad civilian and military applications, such as industrial automation, military tactical surveillance, national security, and emergency health care. The primary function of a sensor network is to enable monitor the specific environment. The use of query techniques has therefore been advocated to allow for efficient information collection and information retrieval of interested data. The purpose of the thesis is to investigate the energy efficient local query and global query protocols for wireless sensor networks (WSN).
