Multiple events may occur simultaneously in heterogeneous sensor networks. It is necessary to aggregate event specific data. Event-Driven Data Aggregation (EDDA) is designed to efficiently gather aggregated data and route event specific data from the location of an event to the base station. The sensor nodes that have detected an event organize into an aggregation tree from the location of event to the base station. The nodes that do not detect the event relay the data to the base station. Such nodes integrate the data from different events into a single packet by prefixing a tag indicating the event type. The performance analysis shows that the EDDA algorithm incurs less energy consumption than existing state-of-the-art algorithms.
