A heterogeneous power efficient load balancing target-monitoring protocol for sensor networks

A critical aspect of applications with WSNs is increase the sensor nodes lifetime. Power constrained WSNs are useable such as they can communicate sensed data to a processing node. Communication and sensing consume energy therefore energy saving and improving lifetime of WSNs can be achieved by scheduling of sensor nodes. In scheduling allow sensor nodes can interchange its state into idle, sleep and active modes and adjusting the transmission or sensing range. In this paper, we provide a problem formulation for the lifetime maximization problem in WSNs with adjustable sensing ranges for a heterogeneous network model (super, advance and normal nodes). The network lifetime increases with the number of sensors at different targets and sensing range. When number of targets increased, the lifetime of the network decreases as more targets are monitored. The simulation results for target monitoring protocol, HALBPS verify that with the adjustable sensing range, heterogeneous nodes and different targets, the overall network lifetime improved as compared with existing protocols.