S. Matsumae (Japan)
wireless sensor network, power efficient protocol, network lifetime, location information
In the wireless sensor networks composed of battery powered sensor nodes, one of the main issues is how to save power consumption on each node. The usual approach to this problem is to activate only necessary nodes (e.g., those nodes which compose a backbone network), and to put other nodes to sleep. One such algorithm using loca tion information is GAF (Geographical Adaptive Fidelity), and GAF is enhanced to HGAF (Hierarchical Geographical Adaptive Fidelity) and to HGAF with triangle cells. In this paper, we show that we can further improve the energy effi ciency of HGAF by just modifying the manner of dividing sensor-eld.
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