Wireless Sensor Network (WSN) consists of many sensor nodes that are all connected to a network. In WSN we have used huge no. of applications such as Area monitoring, Smart office monitoring, Health monitoring, Forest fire detection and eic.,. The data aggregation is the main challenge in the WSN. In this paper, the survey is made on hierarchical based data transmission, Cluster based, Tree structure based, Structure Free data aggregation, layered and Grid based data aggregation and related concepts. This type of structure based data aggregation process uses various algorithms and protocols. When the data transmission speed is high, then the energy utilization is reduced, increasing the high throughput and packet delivery ratio. So, this paper it concentrates on different data aggregation process and also different algorithms are explained and compared.

WSN, Structure Free, Hierarchical structure, Cluster based, Tree structure, Data aggregation

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