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Research on communication collection pattern for traditional fixed nodes with some mobile ones has been already extensive. However, almost nothing is done in tiered movement policy while movement track is unknown and sensor nodes drift at random direction. To fit the development of "Smart dust" wireless sensor network, a new moving control strategy based on RSSI real-time localization is proposed in the multi-tier mobile sensor networks. First, the authors divide the monitoring field into several sub-regions so that fusion nodes can collect data in their own parts respectively, and use Constraints-based Mobile Localization (CML) algorithm to calculate the location information of each sensor node. Then, a new Maximum Likelihood Nearest Neighbor (MLNN) algorithm is proposed to design optimal routes for fusion nodes.
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