Research on the single anchor node moving strategy based on the weighted virtual force mode

The existing mobility strategy of the anchor node in wireless sensor network (WSN) has the shortcomings of too long moving path and low locating accuracy when the anchor node traverses the network voids area. A new mobility strategy of WSN anchor node is proposed based on an improved virtual forces model. The number of neighbor nodes and the distance between the neighbor nodes to the anchor nodes are introduced as their own dense weight attributes. The unknown nodes intensity is used as weights to improve the traditional virtual force model. Using the number of messages received by the unknown node as the parameters to calculate the virtual force from the unknown node to the anchor node. Then according to the virtual force, choose the direction and move the anchor nodes. Simulation experiments show that the algorithm can make the anchor nodes move according to the specific circumstances of unknown node distribution. It has a high locating accuracy and strong adaptability. It can successfully shorten the path of the anchor node movement. Moreover it can effectively avoid the anchor node to enter the network voids area and reduce the number of collinear virtual anchor nodes.