Real-time routing with priority scheduling and power adjustment in wireless sensor networks

buir.advisorKörpeoğlu, İbrahim
dc.contributor.authorÇelikkaya, Emine Büşra
dc.departmentDepartment of Computer Engineeringen_US
dc.descriptionAnkara : The Department of Computer Engineering and the Institute of Engineering and Science of Bilkent University, 2008.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2008.en_US
dc.descriptionIncludes bibliographical references leaves 64-67.en_US
dc.description.abstractMany wireless sensor network applications require real-time communication, and real-time applications require packets to reach destination on time. However, applications may send packets with different priorities and hence delay bounds for packets may vary significantly. Therefore packet differentiation in the network is essential for meeting the deadline requirements. We propose a routing protocol that supports real-time communication by utilizing transmit power adjustment in order to meet the deadline of urgent packets and use energy efficiently. Our protocol also provides packet scheduling and gives precedence to urgent packets. We have conducted experiments on our sensor network testbed to observe the effects of transmit power on end-to-end delay. As expected, increasing transmit power increases the range and link quality, and reduces the number of hops to reach destination. Therefore adjusting transmit power has a great effect on delivery time and can reduce the end-to-end delay. Our protocol, Real-time Routing with Priority Scheduling and Power Adjustment, uses different levels of transmit power for packets with different priorities. It sends urgent packets with maximum power to minimize end-to-end delay and lower priority packets with reduced power to save energy and balance the load on nodes. Simulation results show that our routing protocol increases the deadline meet ratio of packets and reduces the transmit energy spent per packet when compared to routing protocols that use fixed transmit power. Additionally, results indicate that our approach lessens the interference on sensor nodes that are caused by other transmissions and helps balancing the load on the nodes.en_US
dc.description.statementofresponsibilityÇelikkaya, Emine Büşraen_US
dc.format.extentxii, 67 leaves, graphsen_US
dc.publisherBilkent Universityen_US
dc.subjectWireless Sensor Networksen_US
dc.subjectRouting Protocolen_US
dc.subjectReal-time Applicationsen_US
dc.subjectTransmit Power Adjustmenten_US
dc.subjectEnergy Efficiencyen_US
dc.subject.lccTK7872.D48 C45 2008en_US
dc.subject.lcshSensor networks.en_US
dc.subject.lcshWireless LANs.en_US
dc.titleReal-time routing with priority scheduling and power adjustment in wireless sensor networksen_US
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