The three-dimensional spatial localization based on wireless sensor networks

using received signal strength indication（RSSI） ranging technique

combined with the reference node’s coordinates

from the planar localization extended to the three-dimensional spatial localization

through CC2431 wireless sensor networks platform.On the basis of Zig Bee 2006

three-dimensional space position is achieved.Experiment test shows error is controlled within 0.5 m

with high precision and good stability.