Now showing items 1-20 of 56

  • 5G Infrastructures supporting end-user and operational services: the 5G-XHaul architectural perspective 

    Tzanakaki, Anna; Simeonidou, Dimitra; Berberana, Ignacio; Syrivelis, Dimitris; Camps Mur, Daniel; Seyfettin Demirkol, Ilker; Gutiérrez, Jesús; Wei, Qing; Fehske, Albrecht; Eiselt, Michael; Bartelt, Jens; Lyberopoulos, George; Grass, Eckhard; Anastasopoulos, Markos; Korakis, Thanasis; Flegkas, Paris; Pateromichelakis, Emmanouil; Grieger, Michael; Theodoropoulou, Eleni (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    We propose an optical-wireless 5G infrastructure offering converged fronthauling/backhauling functions to support both operational and end-user cloud services. A layered architectural structure required to efficiently ...
  • 5G transport network blueprint and dimensioning for a dense urban scenario 

    Seyfettin Demirkol, Ilker; Camps Mur, Daniel; Bartelt, Jens; Zou, Jim (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Restricted access - publisher's policy
    In this paper, we provide a quantitative evaluation of the deployment aspects and dimensioning of the 5G transport architecture in a representative European city. In particular, we select an example dense urban city scenario ...
  • 5G transport network requirements for the next generation fronthaul interface 

    Bartelt, Jens; Vucic, Nikola; Camps Mur, Daniel; García Villegas, Eduard; Seyfettin Demirkol, Ilker; Fehske, Albrecht; Grieger, Michael; Tzanakaki, Anna; Gutiérrez Terán, Jesús; Grass, Eckhard; Lyberopoulos, George; Fettweis, Gerhard (2017-05-15)
    Article
    Open Access
    To meet the requirements of 5G mobile networks, several radio access technologies, such as millimeter wave communications and massive MIMO, are being proposed. In addition, cloud radio access network (C-RAN) architectures ...
  • A holistic approach to ZigBee performance enhancement for home automation networks 

    Betzler, August; Gómez Montenegro, Carlos; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (2014-08-01)
    Article
    Open Access
    Wireless home automation networks are gaining importance for smart homes. In this ambit, ZigBee networks play an important role. The ZigBee specification defines a default set of protocol stack parameters and mechanisms ...
  • An alternative to IEEE 802.11ba: wake-up radio with legacy IEEE 802.11 transmitters 

    Cervià Caballé, Martí; Calveras Augé, Anna M.; López Aguilera, M. Elena; García Villegas, Eduard; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2019-04-09)
    Article
    Open Access
    Current standardization process for Wake-up Radio (WuR) within the IEEE 802.11 Working Group, known as the IEEE 802.11ba, has brought interest to the IEEE 802.11-related technologies for the implementation of WuR systems. ...
  • A novel wake-up communication system using solar panel and visible light communication 

    Carrascal, Carolina; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    One of the most promising energy-efficient communication methods is the use of wake-up receivers. In this paper, we propose and develop a novel wake-up communication system that uses Visible Light Communication (VLC) and ...
  • BaNa: a noise resilient fundamental frequency detection algorithm for speech and music 

    Yang, Na; Ba, He; Cai, Weiyang; Seyfettin Demirkol, Ilker; Heinzelman, Wendi (2014-08-27)
    Article
    Open Access
    Fundamental frequency (F0) is one of the essential features in many acoustic related applications. Although numerous F0 detection algorithms have been developed, the detection accuracy in noisy environments still needs ...
  • Broadband Networks and Services 

    Hesselbach Serra, Xavier; Seyfettin Demirkol, Ilker (Universitat Politècnica de Catalunya, 2013-01-14)
    Exam
    Restricted access to the UPC academic community
  • Channel model of molecular communication via diffusion in a vessel-like environment Considering a Partially Covering Receiver 

    Turan, Meriç; Kuran, Mehmet Sükrü; Yilmaz, Hüseyin Birkan; Seyfettin Demirkol, Ilker; Tugcu, Tuna (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    By considering potential health problems that a fully covering receiver may cause in vessel-like environments, the implementation of a partially covering receiver is needed. To this end, distribution of hitting location ...
  • CoAP congestion control for the Internet of Things 

    Betzler, August; Gómez Montenegro, Carlos; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (2016-07)
    Article
    Open Access
    CoAP is a lightweight RESTful application layer protocol devised for the IoT. Operating on top of UDP, CoAP must handle congestion control by itself. The core CoAP specification defines a basic congestion control mechanism, ...
  • CoCoA+: an advanced congestion control mechanism for CoAP 

    Betzler, August; Gómez Montenegro, Carlos; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (Elsevier, 2015-10-01)
    Article
    Open Access
    The Constrained Application Protocol (CoAP) has been designed by the Internet Engineering Task Force (IETF) for Internet of Things (IoT) devices. Due to the limited radio channel capacities and hardware resources of such ...
  • Competition: interference-aware multi-channel cross layer protocol for energy-efficient and low-delay networking 

    Sierra Aiello, Guillermo; Seyfettin Demirkol, Ilker; Calveras Augé, Anna M.; Gómez Montenegro, Carlos; García Villegas, Eduard; Betzler, August (Association for Computing Machinery (ACM), 2016)
    Conference lecture
    Restricted access - publisher's policy
    This document aims to present the general ideas and methodology that are planned to be used for the EWSN 2016 Dependability Competition by the Wireless Networks Group of Universitat Politecnica de Catalunya. We designed, ...
  • Congestion control in reliable CoAP communication 

    Betzler, August; Gómez Montenegro, Carlos; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (Association for Computing Machinery (ACM), 2013)
    Conference report
    Restricted access - publisher's policy
    The development of IPv6 stacks for wireless constrained devices that have limited hardware resources has paved the way for many new areas of applications and protocols. The Constrained Application Protocol (CoAP) has been ...
  • Cross-layer energy optimization under image quality constraints for wireless image transmissions 

    Yang, N.; Seyfettin Demirkol, Ilker; 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 ...
  • Design, development and performance evaluation of a low-cost, Low-power wake-up radio system for WSN 

    Oller Bosch, Joaquim; Seyfettin Demirkol, Ilker; 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 ...
  • Energy efficient wireless networking of sensor nodes 

    Seyfettin Demirkol, Ilker; 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; Seyfettin Demirkol, Ilker (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; Seyfettin Demirkol, Ilker; 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; Seyfettin Demirkol, Ilker (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; Seyfettin Demirkol, Ilker (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 ...