An Overview of Data Aggregation in Sensor Networks
Yan Bi · 2004
Sensor networks, consisting of a large number of sensor nodes with limited battery power and the ability for local computation, gather useful information from the nodes using wireless communication technology. Such sys- tems have proposed for a broad use in many applications including military surveillanceand environmental monitoring. It is a critical consideration to collect sensedinformation in an energy efficient manner for obtaining a long lifetime of the sensor network. As one of the mechanisms that can make use of the energy of the sensor nodes efficiently, data aggregation can reduce the traffic in network byutilizing the abilities of the nodes in local computation and storage. Based on a simple introduction of sensor networks, this paper specifies the funcfionsand the classification of data ag- gregation, and analyzes the main aggregation schemes proposed in detail.