Yazar "Cevik, Taner" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim
    Öğe
    EETBR: Energy Efficient Token-Based Routing For Wireless Sensor Networks
    (TUBITAK Scientific & Technical Research Council, 2013) Cevik, Taner; Zaim, Abdül Halim
    The most significant drawback of wireless sensor networks is energy scarcity. As there is an increasing need for operating these networks for relatively long times, energy saving becomes the key challenge in the design of the architectures and protocols for sensor networks. Therefore, several research studies have been performed for making contributions to the analysis of this energy shortage problem. Most of these research activities have been focused on finding solutions for the energy consumption of the communication unit, which is the dominant energy dissipating component of the sensor nodes. In this paper, a novel, token-based routing protocol adapted with a multitier cluster-based architecture is presented. Most of the other cluster-based schemes mainly focus on intracluster organization and communication. However, it should be mentioned that a considerable amount of energy is dissipated during the intercluster communication when compared with intracluster communication. The architecture proposed here not only deals with intracluster communication, but also considers data aggregation, multihop data transmission, and best-effort next hop selection according to a cost factor that is described for the first time in this paper. The simulation results indicate that this token-based next hop selection method together with the multitier cluster-based architecture achieves a significant amount of energy savings, which inherently yields the prolongation of the network lifetime.
  • Küçük Resim
    Öğe
    Localized Power-Aware Routing With An Energy-Efficient Pipelined Wakeup Schedule For Wireless Sensor Networks
    (TUBITAK Scientific & Technical Research Council, 2012) Cevik, Taner; Zaim, Abdül Halim; Yiltas, Derya
    Depending on the evolutions in electronics, wireless sensor networks (WSNs) have been very popular in many areas of human life such as health, industry, and military. This popularity has drawn the attention of many researchers toward WSNs. WSNs are especially favorable in conditions in which it is physically difficult and dangerous for human beings to gather information. Therefore, the lifetime of those networks must be as long as possible, since it would also be infeasible to replace the energy-depleted sensors with new ones, as they may be deployed in such geographical areas that are difficult and dangerous for human beings to enter. In this paper, we present a localized energy-aware routing method, LEERA-MS, and an alternative LEERA-MS-TH method, used in cooperation with an energy-efficient sleep-wakeup schedule, which is included with the pipelining mechanism that we previously proposed. Employing multiple sinks improves performance by providing a fair distribution of the load. Simulation results show that this routing method, applied on a multiple sink topology and when employed together with the pipelined sleep-wakeup schedule, provides 40% longer lifetime for WSNs.
  • Küçük Resim
    Öğe
    A Multichannel Cross-Layer Architecture For Multimedia Sensor Networks
    (Hindawi Publishing Corporation, 2013) Cevik, Taner; Zaim, Abdül Halim
    Depending upon the technological developments, the same fast evolution has occurred in the structures of sensor networks, their composing devices which are sensor nodes, and their application areas. Those tiny, energy-constrained, mostly non-real-time data transmitting sensor nodes have evolved to more energy-containing, camera-adapted, real-timemultimedia-data-transmitting devices. Developments in the usage areas and the capabilities have revealed some other problems such as time limited data transmission. In this paper, we propose amultichannel cross-layer architecture for Quality of Service (QoS) constrained multimedia sensor networks. The proposed architecture considers both the time and energy efficiency concepts. Energy efficiency is succeeded by ensuring the fair load distribution among the nodes during a real-time multimedia packet stream transmission. Besides ensuring the fair load distribution, on-time packet transmission is also assured by constructing the paths with a hard reservation technique depending on the predetermined QoS constraints. Simulations show that the proposed architecture provides higher performance than the Greedy approach and the LEERA scheme.