Wireless sensor network node positioning method based on distance assistance

The invention relates to a wireless sensor network node positioning method based on distance assistance, relating to the technology of wireless sensor network positioning and solving the problem of great error of positioning of traditional wireless sensor network positioning methods. The wireless sensor network node positioning method comprises the following steps of: firstly establishing a mapping table relative to signal strength and distance, then receiving the signal strength of beaconing nodes, and querying the mapping table according to the signal strength of the beaconing nodes to further obtain the cumulative distance of other nodes; calculating the positioning correction value of the beaconing nodes, and further obtaining the effective positioning distance between an unknown nodeand the beaconing node; and finally utilizing a trilateration method or a maximum likelihood estimation method to calculate the position coordinates of the unknown node to complete wireless sensor network node positioning. The invention is suitable for wireless sensor network positioning.