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Konu "Cognitive radio networks." için Bilgisayar Mühendisliği listeleme

Konu "Cognitive radio networks." için Bilgisayar Mühendisliği listeleme

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  • A scheduling model for centralized cognitive radio networks 
    Gözüpek, Didem. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this thesis, we present a scheduling model for centralized cognitive radio networks. Our model consists of a set of schedulers that focus on the data transmission of the secondary users and determine with which frequency, ...
  • Alternative spectrum trading architectures in cognitive radio networks: Spectrum exchange, CRM, strict power control 
    Alptekin, Gülfem Işıklar. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    The underutilization of spectrum coupled with developments in network technologies has prompted a number of proposals for managing spectrum. Dynamic spectrum access radio technology, which is based on cognitive radio ...
  • Channel selection and assignment schemes for efficient spectrum sharing and energy efficiency in cognitive radio networks 
    Bayhan, Suzan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this thesis, we focus on distributed channel selection and centralized channel assignment in cognitive radio networks (CRN). For the former topic, we are concerned with the efficiency of spectrum sharing whereas in the ...
  • Cooperative spectrum sensing and radio environment map construction in cognitive radio networks 
    Yılmaz, Hüseyin Birkan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this thesis, we focus on both internal and external sensing in Cognitive Radio (CR) networks. In internal sensing, individual CRs discover spectrum opportunities via spectrum sensing whereas in external sensing, an ...
  • Effect of social relations on cooperative sensing in cognitive radio networks 
    Güven, Mehmet Can. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Previous works in cognitive radio networks (CRNs) have shown that cooperation in sensing improves sensing reliability and in turn enhances the network throughput. Although this altruistic cooperative behavior is accepted ...
  • Heuristic algorithms for scheduling in centralized cognitive radio networks 
    Eraslan, Başak. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    In this thesis we propose heuristic scheduling algorithms for the centralized, time slotted cognitive radio network (CRN) model in [1]. In the considered CRN scheme, a frequency f and time slot t pair constitutes a resource ...
  • Layered content delivery over satellite integrated cognitive radio networks 
    Kafıloğlu, Sebahat Sinem. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    Although the spectrum is a scarce and valuable resource, the utilization of spectrum in various frequency bands in certain areas are shown to be very low. Because of this under-utilization and ine ciency, cognitive radio ...
  • Modeling and performance analysis of cognitive radio networks 
    Çavdar, Derya. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Cognitive radio heralds the next step in the evolution of wireless communications. Cognitive radio networks are inherently priority based and preemptive. Hence, keeping track of each resource in each cell is mandatory. In ...
  • Secure spectrum sensing for satellite assisted cognitive radio networks 
    Ersöz, Seda Demirağ. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    In this thesis study, we propose a security structure for spectrum sensing and decision scheme for a satellite assisted Cognitive Radio Network (CRN). The main goal of Cognitive Radio (CR) is to provide agility in the ...