Abstract
With the large-scale application of wireless sensor network, the position information of sensor nodes is more and more important. The position information of the unknown nodes are mainly depended on the beacon node the in wireless sensor network. First, the concept and characteristics of wireless sensor networks of the positioning technologies are briefly described. Then, the calculation methods of existing node positioning technologies are introduced. Next, the wireless sensors are described in detail from two aspects: range-based and range-free. Finally, summarizes the possible defects of positioning technology and looks forward to the future development of the node positioning technology.
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