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Research On Data Collection Strategy In Wireless Sensor Networks With Mobile Sink

Posted on:2019-09-02Degree:MasterType:Thesis
Country:ChinaCandidate:P H LinFull Text:PDF
GTID:2428330566986067Subject:Communication and Information System
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Wireless Sensor Networks(WSN),which is usually composed of a large number of sensor nodes,has been widely used in industry and daily life.Energy sources of sensor nodes in WSNs are typically non-rechargeable batteries,which make energy saving an enormous challenge.Multi-hop routing in data transmission,which is widely used for traditional WSNs,leads to energy-hole problem inevitably and shortens the network lifetime largely.To alleviate the energy hole problem,this thesis introduced Mobile Sink Wireless Sensor Network(MSWSN)and two studies on its clustering and mobile sink path planning respectively:1.We proposed a clustering scheme in MSWSN which is called topology-based clustering algorithm(TBCA).Based on TBCA and given topology of a MSWSN,we proposed a data collection scheme to ensure the datas of all nodes in WSN can be collected correctly.The number of clusters and the average distance between nodes in a cluster are as small as possible to reduce transmission delay and intra-cluster energy consumption.To reduce network energy consumption and extend network lifetime,the core mechanism of TBCA is to use the topology structure to aggregate adjacent nodes into clusters as much as possible.2.In the scene of WSN divided into isolated areas.A new mobile data collecting scheme called Mobility-Assisted Data Gathering Strategy(MADGS)is proposed.MADGS,which focuses on both delay and energy consumption,is mainly devoted to minimize the delay of data collection or to minimize the energy consumption of the network while meeting the constraints of delay.The innovation of MADGS is to dynamically plan the moving path of the mobile sink according to the delay requirements,shorten the path under the consideration of specific shapes of isolated areas,and allocate the path length according to the number of nodes in each area.For WSN with a simple topology and a small number of nodes,MADGS can rapidly plan a moving path of the mobile sink,and for those more complex and with a large number of nodes,MADGS has corresponding mechanisms to extend the rendezvous points to minimize overall energy consumption and extend the network lifetime,which shows wide range of applications thereof.
Keywords/Search Tags:Wireless Sensor Networks, clustering algorithm, mobile sink, data collection, energy balance
PDF Full Text Request
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