Method for tracking moving targets in wireless sensor networks

Abstract

The invention discloses a method for tracking moving targets in wireless sensor networks. Monitoring areas are subjected to partition management, a management node is in charge of tracking tasks of an area, and position information of all nodes is not needed to be acquired by a base station; management nodes determine nodes needed to be awakened in the next sampling time period according to positions of main tracking nodes in the previous sampling time period. During each sampling time period, only a small part of nodes is in monitoring or moving states while most of the nodes remain dormant; ordinary nodes monitoring targets only need to send information to the management nodes, and information exchange is not needed; when the targets are lost, searching in one area is performed firstly, then whole network tracking is performed when the area searching fails. By the method for tracking moving targets in the wireless sensor networks, energy consumption of the nodes and communication times among the nodes are reduced, life circle of the networks is prolonged, and communication resources are saved.

Description

technical field [0001] The invention relates to a mobile target tracking method used in wireless sensor networks, belonging to the field of wireless sensor networks. Background technique [0002] The wireless sensor network is composed of a large number of sensor nodes distributed in the monitoring area, and each sensor node has the functions of sensing, storing, processing information, and communicating with other sensor nodes. Target tracking is one of the important applications of wireless sensor networks, mainly used in military, environmental monitoring, patient health monitoring and wild animal research and other fields. Since the power carried by sensor nodes is limited, and it is difficult to replace the battery of sensor nodes in many application fields, how to save sensor node energy during target tracking has become a major challenge for wireless sensor networks. Therefore, in the process of tracking, how to let only a small number of nodes track the target, whil...

AI Technical Summary

Problems solved by technology

A prediction-based algorithm (Prediction-based Protocol), see the Journal of Central South University of Technology, "A Prediction-Based Energy Efficient Wireless Sensor Network Target Tracking Algorithm", (BHUIYAN M.Z.A., Wang Guo-jun and Zhang Li.Prediction -based energy-efficient target tracking protocol in wireless sensor networks. Cent. South Univ. Techonl., 2010, 33: 736-744.) According to the direction and speed of the target's current movement, predict the next position of the target, and then wake up the surrounding area of ​​the target , but when the moving direction of the target is constantly changing, the target position cannot be accurately predicted

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