HGAF-h: A Hierarchical Honeycomb Cooperative Power Saving Architecture for Sensor Networks

Sensor nodes of wireless sensor networks are placed in observation areas and transmit data to the observer by using multi-hop communication between nodes. Because these nodes are small and have a limited power supply, they must save power in order to prolong the networkpsilas lifetime.In our previous work, we proposed a power saving technique called HGAF (hierarchical geographic adaptive fidelity)that introduces a layered structure into GAF (geographic adaptive fidelity) for more efficient power saving.HGAF divides observation area into some square cells for making clusters of sensor nodes. In this paper, we propose an extended scheme of HGAF which we called hierarchical geographical adaptive fidelity with honeycomb virtual mesh(HGAF-h). HGAF-h divides the observation area into some hexagonal cells for more reliable data transmission than HGAF. Simulation results show that HGAF-h achieves long network lifetime at networks with regularly placed sensor nodes.