Energy Conservation in Large-Scale Sensor Networks through Wakeup Mechanism and Clustering Aggregation

To lengthen the lifetime of the sensor network significantly, a node should turn off its radio most of the time, expect when it has to participate in data forwarding. We propose an asynchronous wakeup mechanism, which efficiently wakes up nodes while transmission or monitoring the channels based on the concept of the grid-based quorum (GQMA). Next, we consider a simplified clustering mode for a sensor network integrated GQMA. All the nodes are in the power-saving modes following the wakeup mechanism discussed above except getting the TDMA schedule from a clusterhead (CH). Compared with other hierarchical clustering algorithms, our protocol can achieve more power conservation on the phases of cluster formation and routing tree setup by reducing idle listening time and does not demand clock synchronization between the nodes. Simulation results show that the proposed protocols have good performances in the aspects of energy conservation and efficiency.