Energy-efficient Real-time Query Processing Approach in Wireless Sensor Networks
Real time and energy efficiency are important metrics for some applications such as military and emergency in wireless sensor networks.An approach to maximize the node-accessed amount and minimize the energy cost within the query deadline is proposed.The concepts of Slack Time and Data Delivery Mode are raised to make an effective query plan for real-time queries.At first it computes out the hop thresholds based on the Slack Time and compares the hop counts in the node's routing tables with the thresholds,then decides data delivery mode for each node.The simulation experiments prove that the query processing approach is valid on the accuracy and energy consumption for real-time query.