Design and Implementation of the Node Tolerance and Repair Procedure in Wireless Sensor Network and Its Application

  • 黃 珮瑜

Student thesis: Master's Thesis


In recent years the wireless sensor network (WSN) has gradually been noticed for monitoring the various environmental parameters The WSN is constituted with a large number of sensor nodes which connect to one another by wireless communication deployed in the unattended region Generally sensor nodes are used to sense the environment collect and calculate the interested data Then the sensor nodes deliver the sensed data to the Root a single node in the highest layer of the tree network by multi-hop transmission During the sensor node’s monitoring the environment the consumption of power is an extremely significant factor that directly effects the lifetime of the WSN Due to the limited power of the sensor node and the influence from the external factors it is possible that the sensor nodes may break down In this respect we have to take the protection measures to avoid the network from crashing caused by failure of a few sensor nodes’ working In this thesis we propose node tolerance to maintain the normal operation of the sensor network enhance the network structure and its robustness and reduce the error rate of the sensed data in the broken region where the sensor nodes fail to link with the Root In this thesis general sensor nodes are established by the traditional Cluster-Tree (CT) topology Therefore for increasing the flexibility of network structure the combination of the Cluster-Mesh-Tree (CMT) and the CT topology will be used to conquer the weakness of immovable link in traditional CT topology and also maintain the basic structure of tree topology Eventually a repair procedure to restore the failure nodes and avoid the sensed data lost is proposed The repair robot can repair the failure nodes by re-booting and collecting the sensed data of the failure nodes through directly contacting before personnel arrive at the site To contact with the failure node directly the position method is critical for repair procedure Regarding this concern we therefore employ a positioning algorithm called fingerprinting in the received signal strength (RSS) model and use the IR positioning with infrared sensor to compensate the error distance generated from fingerprinting algorithm method The research saves human labor to maintain the WSN and its routine mission In this thesis the GUI software has been implemented by Visual Basic 2010 development platform The User can store the sensed data monitor observe and manage the changes of environment with the platform
Date of Award2014 Jul 26
Original languageEnglish
SupervisorTeh-Lu Liao (Supervisor)

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