A fault tolerant approach for data aggregation in wireless sensor networks

Due to existing and emerging applications in various situations, wireless sensor networks (WSNs) have emerged as a premier research topic. Data aggregation is a basic operation in Wireless Sensor Network. For an application which is aggregative in nature such as environment monitoring system or health monitoring system, the tree based data aggregation is the most efficient technique, in terms of energy and data collection time. But, when one of nodes stops responding due to energy loss or hardware malfunction or external cause such as fire, flood etc, then the rest of the nodes under that node will not be able to send their data even if there is some other path. In this paper we have tried to fix this issue by using secondary parent.