Browsing by Author "Demirkol, Ilker Seyfettin"Més informacióMés informació

Now showing items 21-40 of 83

    • Cross-layer energy optimization under image quality constraints for wireless image transmissions 

      Yang, N.; Demirkol, Ilker Seyfettin; Heinzelman, W. (2012)
      Conference report
      Restricted access - publisher's policy
      Wireless image transmission is critical in many applications, such as surveillance and environment monitoring. In order to make the best use of the limited energy of the battery-operated cameras, while satisfying the ...

    • Density-aware mobile networks: opportunities and challenges 

      Mollahasani, Shahram; Eroglu, Alperen; Demirkol, Ilker Seyfettin; Onur, Ertan (2020-04)
      Article
      Open Access
      We experience a major paradigm shift in mobile networks. The infrastructure of cellular networks is becoming mobile since it is being densified also by using mobile and nomadic small cells to increase coverage and capacity. ...

    • Design, development and performance evaluation of a low-cost, Low-power wake-up radio system for WSN 

      Oller Bosch, Joaquim; Demirkol, Ilker Seyfettin; Casademont Serra, Jordi; Paradells Aspas, Josep (2013-11-01)
      Article
      Restricted access - publisher's policy
      Energy-efficient operation is a challenge for wireless sensor networks (WSNs). A common method employed for this purpose is duty-cycled operation, which extends battery lifetime yet incurs several types of energy wastes ...

    • Dynamic buffer sizing and pacing as enablers of 5G low-latency services 

      Irazabal Bengoa, Mikel; López Aguilera, M. Elena; Demirkol, Ilker Seyfettin; Nikaein, Navid (2020-08-17)
      Article
      Open Access
      3GPP standards organization is performing an impressive effort trying to reach sub-millisecond latencies for 5G. However, such efforts may become fruitless if exogenously generated delays at transport layer are not considered. ...

    • Effect of receiver shape and volume on the Alzheimer disease for molecular communication via diffusion 

      Isik, Ibrahim; Yilmaz, Hüseyin Birkan; Demirkol, Ilker Seyfettin; Tagluk, Mehemet Emin (2020-09-01)
      Article
      Open Access

    • Energy and delay optimized contention for wireless sensor networks 

      Demirkol, Ilker Seyfettin; Ersoy, Cem (2009-09)
      Article
      Restricted access - publisher's policy
      In wireless sensor network (WSN) studies, the main objective is minimizing the energy consumption so that the lifetime is maximized under the limited battery capacity constraints. Additionally, in most event-driven WSN ...

    • Energy efficient wireless networking of sensor nodes 

      Demirkol, Ilker Seyfettin; Paradells Aspas, Josep; Oller Bosch, Joaquim; Casademont Serra, Jordi; Calveras Augé, Anna M.; Catalán Cid, María Luisa (2013)
      Conference report
      Open Access
      Wireless sensor networks have paved the way to a new era in user applications, where information can be sensed, processed, and distributed from remote environments with minimal or no human interaction. As the sensor nodes ...

    • Enhanced handover signaling through integrated MME-SDN controller solution 

      Jain, Akshay; López Aguilera, M. Elena; Demirkol, Ilker Seyfettin (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Open Access
      The future wireless networks are expected to be extremely dense and heterogeneous, with the users experiencing multi-connectivity through the multiple available radio access technologies (RATs). These prevalent characteristics, ...

    • Enhanced multiclass SVM with thresholding fusion for speech-based emotion classification 

      Yang, Na; Yuan, Jianbo; Zhou, Yun; Demirkol, Ilker Seyfettin; Duan, Zhiyao; Heinzelman, Wendi; Sturge Apple, Melissa L. (2017-03-01)
      Article
      Open Access
      As an essential approach to understanding human interactions, emotion classification is a vital component of behavioral studies as well as being important in the design of context-aware systems. Recent studies have shown ...

    • Evaluation of advanced congestion control mechanisms for unreliable CoAP communications 

      Betzler, August; Gómez Montenegro, Carlos; Demirkol, Ilker Seyfettin (2015)
      Conference report
      Restricted access - publisher's policy
      Networks of constrained devices play an important role in the Internet of Things (IoT). In such networks congestion may lead to significant performance decrease and is a recurring phenomenon given the restricted hardware ...

    • Evolutionary 4G/5G network architecture assisted efficient handover signaling 

      Jain, Akshay; López Aguilera, M. Elena; Demirkol, Ilker Seyfettin (Institute of Electrical and Electronics Engineers (IEEE), 2018-12-06)
      Article
      Open Access
      Future wireless networks are expected to be ultra-dense and heterogeneous not just in terms of the number and type of base stations but also in terms of the number of users and the application types they access. Such a ...

    • Experimental evaluation of congestion control for CoAP communications without end-to-end reliability 

      Betzler, August; Isern, Javier; Gómez Montenegro, Carlos; Demirkol, Ilker Seyfettin; Paradells Aspas, Josep (Elsevier, 2016-12-01)
      Article
      Open Access
      The Constrained Application Protocol (CoAP) has been designed by the Internet Engineering Task Force (IETF) for Internet of Things (IoT) communications. CoAP is a lightweight, request/response-based RESTful protocol that ...

    • Fast data recovery for improved mobility support in multiradio dual connectivity 

      Pupiales Yépez, Carlos; Laselva, Daniela; Demirkol, Ilker Seyfettin (Institute of Electrical and Electronics Engineers (IEEE), 2022-09-05)
      Article
      Open Access
      Data aggregation is one of the crucial features of the 3GPP Multi-Radio Dual Connectivity (MR-DC) technology. However, mobility events and radio link failures, which may occur during the data aggregation, may pose challenges ...

    • Has time come to switch from duty-cycled MAC protocols to wake-up radio for wireless sensor networks? 

      Oller, Joaquim; Demirkol, Ilker Seyfettin; Casademont Serra, Jordi; Paradells Aspas, Josep; Gamm, Gerd Ulrich; Reindl, Leonhard Michael (2016-04-01)
      Article
      Open Access
      Duty-cycled Medium Access Control (MAC) protocols certainly improve the energy efficiency of wireless networks. However, most of these protocols still suffer from severe degrees of overhearing and idle listening. These two ...

    • How does noise impact speech-based emotion classification? 

      Yang, Na; Yuan, Jianbo; Zhou, Yun; Demirkol, Ilker Seyfettin; Heinzelman, Wendi; Sturge Apple, Melissa L. (2014)
      Conference report
      Open Access
      Emotion classification, Support vector machine, Thresholding fusion, Noisy speech

    • IEEE 802.11-enabled wake-up radio system: design and performance evaluation 

      Oller Bosch, Joaquim; García Villegas, Eduard; López Aguilera, M. Elena; Demirkol, Ilker Seyfettin; Casademont Serra, Jordi; Paradells Aspas, Josep; Gamm, Gerd Ulrich; Reindl, Leonhard Michael (Institution of Electrical Engineers, 2014-09-25)
      Article
      Open Access
      Today, the vast majority of personal communication devices, such as laptops, smartphones, and logically wireless fidelity (Wi-Fi) access points feature IEEE 802.11 chipsets. In turn, wake-up radio (WuR) systems are used ...

    • IEEE 802.11-Enabled Wake-Up Radio: use cases and applications 

      López Aguilera, M. Elena; Demirkol, Ilker Seyfettin; García Villegas, Eduard; Paradells Aspas, Josep (Multidisciplinary Digital Publishing Institute (MDPI), 2019-12-21)
      Article
      Open Access
      IEEE 802.11 is one of the most commonly used radio access technologies, being present in almost all handheld devices with networking capabilities. However, its energy-hungry communication modes are a challenge for the ...

    • Improved handover signaling for 5G networks 

      Jain, Akshay; López Aguilera, M. Elena; Demirkol, Ilker Seyfettin (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Open Access
      Mobility management is a critical component for any new wireless standard to be ubiquitous. While 4G-LTE and prior wireless standards utilized vendor specific hardware and software on which mobility management (MM) ...

    • Infrastructureless smart cities. Use cases and performance 

      Paradells Aspas, Josep; Gómez Montenegro, Carlos; Demirkol, Ilker Seyfettin; Oller Bosch, Joaquim; Catalán Cid, María Luisa (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      Smart cities are a hot topic nowadays for several reasons. For city managers and citizens a smart city is a concept that should allow providing better services and/or with more efficiency. For technicians a smart city ...

    • Intertwined localization and error-resilient geographic routing for mobile wireless sensor networks 

      Benkhelifa, Imane; Moussaoui, Samira; Demirkol, Ilker Seyfettin (Springer, 2018-01-01)
      Article
      Open Access
      Geographic routing in wireless sensor networks brings numerous inherent advantages, albeit its performance relying heavily on accurate node locations. In mobile networks, localization of the continuously moving nodes is a ...