Mobile path planning method for multi-anchor node groups in wireless sensor networks

Abstract

The invention relates to a method for planning a moving path of a multi-anchor-node set of a wireless sensor network. The wireless sensor network comprises a plurality of static unknown nodes and three movable anchor nodes. The method comprises the steps that a dynamic binding relationship and a static binding relationship exist among the three movable anchor nodes and a relationship mode among the three movable anchor nodes is firstly determined; a moving model of the multi-anchor-node set is determined according to environment application requirements, the relationship mode of the three movable anchor nodes, and the positions of the three anchor nodes and energy surplus of the three anchor nodes in a zone; the three movable anchor nodes are located on the peak portions of an equilateral triangle respectively, beacon signals are moved and sent every period T according to the determined moving model, covering of the whole zone is guaranteed by means of the adoption of two kinds of margin loophole solution methods when the beacon signals move to the boundary of the sensing zone, beacon information is continuously monitored and received by the unknown nodes, and position information is obtained through a trilateration method. The method is capable of effectively assisting in location and improving the location accuracy and the location covering rate.

Description

technical field [0001] The invention belongs to the field of wireless sensor networks, in particular to a mobile path planning method for multi-anchor node groups in a wireless sensor network. Background technique [0002] In recent years, wireless sensor networks (Wireless Sensor Networks, WSN) have developed rapidly and are widely used in the fields of environment, military, security, industry and furniture. The precise location information of sensor nodes is of great significance to the application of WSN. At present, scholars have proposed many positioning mechanisms for WSN. Many positioning mechanisms use static anchor nodes. In practical applications, there are problems of low positioning accuracy, low positioning coverage, and high network costs. To solve these problems, a localization method using mobile anchor nodes to assist node localization is proposed. The mobility models of mobile anchor nodes are mainly divided into two categories: random mobility models and...

AI Technical Summary

Problems solved by technology

[0010] 1. Most of the path planning schemes are only designed for one mobile anchor node. Once there are multiple mobile anchor nodes in the application or the mobile anchor nodes exist in groups, these schemes will not be applicable

[0011] 2. The traditional path planning method has edge problems and collinear problems in path planning, which lead to low positioning accuracy, low positioning coverage and high energy consumption.

[0012] 3. Most path planning methods use a mobile anchor node. Although it can save network costs, it reduces the positioning rate of the entire network, which is limited in practical applications.

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