| Summary: | 碩士 === 國立中央大學 === 資訊工程研究所 === 90 ===
In this thesis, we present a new energy-efficient directed diffusion
protocol by using a proposed diagonal-based hexagonal-mesh scheme for a
wireless sensor network. The wireless sensor network is more reasonable to
carefully build a fixed-topological wireless network environment than the
conventional MANET due to the low mobility. Therefore, all sensor nodes are
arranged into a fixed-topological wireless network structure, namely the
hexagonal-mesh, while the MAC protocol is adopted the periodic
active-and-sleep model. Wireless sensor networks use battery-operated
computing and sensing devices. The directed diffusion is mainly operated on
the diagonal-paths of the hexagonal-mesh under the energy-efficient
consideration. To achieve the energy-efficient purpose, our diagonal-based
directed diffusion scheme has the following main contributions; (1) a
periodic active-and-sleep MAC protocol on TDMA channel model is designed, (2)
a periodic backbone-path-exchange scheme is periodically performed on the
diagonal-mesh to consider the per-node fairness problem, (3) three kinds of
directed diffusion communication applications are developed based on the
diagonal-based scheme. Finally, performance analysis result is finally
demonstrated to illustrate the energy-efficient achievement of our proposed
scheme.
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