Placement and Selection Algorithm of Beacon Nodes in WSN Localization

Currently,few studies of wireless sensor network node localization algorithm were focused on the beacon nodes,but how to choose and place the beacon nodes has a large impact on the positioning accuracy.In order to quantitatively study this issue,a theorem was proved that offers a desiription of the relationship between the placement of beacon nodes and whether the unknown node could be located,then the beacon nodes placement method was designed.Finally,a beacon nodes selection algorithm was proposed based on the condition number of linear equations,so as to improve the accuracy of range-based localization algorithm.