Self-positioning method of sensor network node based on distance size ordinal relation

Abstract

The invention provides a sensor network node self-positioning method based on the relation of distance, size and sequence, belonging to the field of wireless sensor network self-positioning technique. The method of the invention is characterized in that the method sequentially comprises the steps as follows: node establishing, routine establishing and data transmission, network connecting information extracting, node relative coordinate positioning, absolute coordinate converting, compute result outputting and the like. When the relative coordinate of the node is being positioned, the relation of distance, size and sequence of the shortest path distance is used for obtaining the initial estimation topology of the node position; based on the initial estimation topology, a logarithm likelihood function of optimum node distance matrix and inverse solution Euclidean distance used as initial estimation topology; subsequently, an adjacent module comparison method is used to alternatively iterate the optimum distance matrix and the Euclidean distance; the method of the invention is not dependent on the detailed measurement value of the distance, only uses the relative sequence relation of the distances between nodes and has unique advantages.

Description

technical field [0001] The invention belongs to the field of wireless self-organizing network self-positioning, and specifically includes: a wireless sensor network self-positioning technology, a statistical signal processing method, and a multidimensional scale analysis technology. Background technique [0002] The rapid development of Microelectronics Integration (MEMS) technology has laid the foundation for the design and implementation of System-on-Chip (SOC), making it possible to integrate a variety of sensors and manufacture miniaturized, low-cost, and multi-functional sensor nodes. The wireless sensor network composed of a large number of MEMS sensor nodes has been widely used in many fields such as military operations, environmental monitoring, medical diagnosis, home entertainment, space exploration and commercial manufacturing. Different from the traditional wireless ad hoc network, the wireless sensor network is mainly aimed at monitoring the physical world. It i...

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Problems solved by technology

[0012] This mechanism that relies on the specific value of the distance measurement has several weaknesses: 1. The accuracy of the positioning algorithm is highly dependent on the accuracy of the distance measurement value; 2. The harsh electromagnetic propagation environment in the real network will lead to difficulties in communication between nodes , so that the distance of some node pairs cannot be measured

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