Abstract
A 3D node localization scheme for WSNs is developed in this paper. In the scheme, a single mobile beacon submits UWB signals to the sensor nodes to help the whole network localize. Each sensor node receives the UWB signals and adopts TOA technique to measure the distances to the mobile beacon. SDI is proposed as the 3D positioning algorithm executed locally on each sensor node, and simulation is provided to compare it with two representative positioning algorithms, Min-max and Lateration, in terms of some evaluation parameters. The analysis in theory and the simulation show that our scheme can be a utilitarian 3D node localization scheme for WSNs.
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