Study On Hunting Deployment Of Underwater Sensors Based On Level Set Method

As a new method of exploring and developing the ocean,underwater wireless sensor networks(UWSN)play an important role in the detection and monitoring of underwater areas that are not easily accessible to humans.Underwater wireless sensor networks have been widely used in many fields,such as marine information collection,geological disaster prevention,resource exploration and military monitoring.It is one of the hot spots in the field of UWSN.In underwater space,how to autonomously adjust the position of sensor nodes to achieve coverage and monitoring of events is an important topic.Sensor deployment provides support for network topology,target monitoring,data routing and other application fields,which is the key to determine the service quality and work efficiency of underwater wireless sensor networks.Therefore,it is of great significance to study the deployment of underwater sensors.The main contents and innovations of this dissertation are as follows:(1)In this dissertation,hunting deployment of underwater sensors based on level set method is proposed.In this method,the gateway organizes the sensors in the communication range to form a local computing unit.The gateway establishes a computing model driven by energy function according to the location information of sensor nodes and the concentration information of the region of interest,and simulates the dynamic evolution mechanism of level set to obtain the edge information of the interest domain.The sensor calculates its own dynamic parameters based on its position and the edge information of the interest domain,and autonomously completes the migration toward the edge of the interest domain.The migration of a large number of sensors can gradually evolve into a hunting coverage of the interest domain.(2)In this dissertation,two performance evaluation indexes,structural similarity SSIM and network energy consumption balance,are established to evaluate the comprehensive performance of the proposed method in the implementation of interest domain driven underwater nodes deployment.The structural similarity can reflect the hunting of the interest domain by the sensors.The network energy consumption balance is used to evaluate the energy consumption balance of each sensor.The simulation results show that this method can achieve the hunting coverage of the edge of the interest domain under different sensor scales,sensor density and shape of the interest domain,and realizes effective tracking and monitoring of the interest domain.This dissertation focuses on the method of sensor deployment,which has certain reference value and significance.