XIE Xiao-song, CHENG Liang-lun. Localization algorithm for wireless sensor networks based on mobile beacon dynamic selection[J]. 2011, 30(1): 123-126+130.
Node localization is the basis of many applications of wireless sensor networks.DV-Hop is a kind of range-free localization algorithm
but the positioning precision depends on the network’s connecting situation.For irregular topology network
the localization error is large.In view of this situation
an improved DV-Hop algorithm based on mobile beacon dynamic selection is proposed.A mobile beacon is used to move around the network according to predestinate path and broadcast messages with its localization information
and calculate the average of one-hop distance.Unknown node dynamic selects the three beacons which can acquire the highest precision and use trilateration algorithm to calculate its position.Simulation results prove that the algorithm can improve the localization precision.