Yazar "Ertürk, Ismail" seçeneğine göre listele

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    Impact of active node determination approach for energy efficiency in WSN MAC protocol design
    (2011) Sazak, Nükhet; Ertürk, Ismail; Köklükaya, Etem; Çakıroğlu, Murat
    In wireless sensor network (WSN) applications where large number of resource constrained nodes are deployed to remote locations and left unattended for a long time, energy efficiency becomes one of the most significant design issues. In this paper, an active node determination method (ANDM) is explained for WSN MAC design to improve the energy efficiency. Utilizing the ANDM, we present that the ANDM integrated E-TDMA well supersedes E-TDMA protocol, offering approximately up to 31 % better energy usage. © 2011 HTE. © 2012 Elsevier B.V., All rights reserved.
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    SRRA: Smart redundancy reconfiguration algorithm for communication satellite payload
    (Gazi Universitesi Muhendislik-Mimarlik mmfd@gazi.edu.tr, 2014) Gulgonul, Senol; Köklükaya, Etem; Ertürk, Ismail; Tesneli, Ahmet Yahya
    Redundancy is provided by using multiport switches which are connecting equipment in communication satellite payload systems. In case of a failure, signal path is re-routed by changing suitable switch positions. SmartRedundancy Reconfiguration Algorithm (SRRA) is a novel algorithm, able to model any payload system and to find paths recursively to redundant equipment. Results of the SRRA are verified by means of comparing them to those of the ICAREF commercial software which is currently being used in TURKSAT-3A satellite operations.SRRA can find all paths connecting given input(s) to any output(s) by taking number of interruptions and number of switches crossed constraints into account. © 2014 Elsevier B.V., All rights reserved.