Node positioning method and node positioning system

Abstract

The invention belongs to the technical field of communication and in particular relates to a node positioning method and a corresponding node positioning system. The node positioning method comprisesthe following steps: initializing a node and screening a node to be detected, which has at least four anchor nodes at the periphery; optimizing a weight factor of a positioning coordinate; calculatingan estimated coordinate value of the node to be detected according to the optimized weight factor of the positioning coordinate; selecting four nodes which have the closest distance from the node tobe detected as revised anchor nodes; calculating measured coordinate values of the revised anchor nodes according to the optimized weight factor of the positioning coordinate; calculating a positioning mean value error according to the measured coordinate values of the anchor nodes; correcting the estimated coordinate value of the node to be detected according to the positioning mean value error and calculating the position of the node to be detected. According to the node positioning method and system, provided by the invention, a more accurate position coordinate is obtained through a mannerof optimizing the weight factor of the positioning coordinate and carrying out positioning error compensation, so that the node positioning precision can be effectively improved and the node positioning precision can be improved to the greatest extent.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a node positioning method and a corresponding node positioning system. Background technique [0002] With the development of Internet of Things technology, there are more and more occasions and demands for sensor positioning. If the specific location information of the nodes is lacking, the relevant data information may not be used correctly. For example, in environmental monitoring, accurately locating forest temperature is a prerequisite for fire prevention. Obtaining accurate location information of sensors is a prerequisite for the application of Internet of Things technology. [0003] In most outdoor environment applications, nodes collect information randomly, and the coordinates of nodes have great uncertainty; while in indoor environment applications, although GPS can be installed on sensors to obtain location information, GPS The cost of the signal r...

AI Technical Summary

Problems solved by technology

[0003] In most outdoor environment applications, nodes collect information randomly, and the coordinates of nodes have great uncertainty; while in indoor environment applications, although GPS can be installed on sensors to obtain location information, GPS The cost of the signal receiving device is high, and it is greatly affected by the environment, so there are certain obstacles in the application and promotion

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