Now showing items 1-14 of 14

  • 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 ...
  • 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 ...
  • Enabling technologies and benefits of multi-tenant multi-service 5G small cells 

    Giannoulakis, I.; Fajardo, J.O.; García Lloreda, J.; Sayyad Khodashenas, Pouria; Ruiz, Cristina; Betzler, August; Kafetzakis, E.; Pérez Romero, Jordi; Albanese, A.; Paolino, M.; Riggio, R. (2016)
    Conference report
    Restricted access - publisher's policy
    In this manuscript, we present the main concepts of the 5G-PPP SESAME project dedicated to the implementation of Cloud-Enabled Small Cells (CESCs), able to support edge cloud computing in a multi-tenant, multiservice ...
  • 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 ...
  • Experimental evaluation of congestion control for CoAP communications without end-to-end reliability 

    Betzler, August; Isern, Javier; Gómez Montenegro, Carlos; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (Elsevier, 2016-12-01)
    Article
    Restricted access - publisher's policy
    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 ...
  • Improvements to end-to-end performance of low-power wireless networks 

    Betzler, August (Universitat Politècnica de Catalunya, 2015-07-07)
    Doctoral thesis
    Open Access
    Over the last decades, wireless technologies have become an important part of our daily lives. A plentitude of new types of networks based on wireless technologies have emerged, often replacing wired solutions. In this ...
  • Large-scale performance evaluation of the IETF Internet of Things protocol suite for smart city solutions 

    Isern, Javier; Betzler, August; Gómez Montenegro, Carlos; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (2015)
    Conference lecture
    Restricted access - publisher's policy
    The Internet of Things (IoT) intends to interconnect massive amount of heterogeneous, smart devices, with the goal of interweaving the virtual world with the physical world. Smart Cities are typical IoT application domains, ...
  • Network architecture and essential features for 5G: the SESAME project approach 

    Goratti, Leonardo; Costa, Cristina E.; Pérez Romero, Jordi; Sallent Roig, José Oriol; Ruiz, Cristina; Betzler, August; Sayyad Khodashenas, Pouria; Vahid, Seiamak; Nasr, Karim; Abubakar, Babangida; Whitehead, Alan; Belesioti, Maria; Chochliouros, Ioannis (Springer, 2016)
    Conference report
    Restricted access - publisher's policy
    The outstanding and continuous growth of the request of mobile broadband Internet access is creating the unprecedented need to rethink most of the design paradigms of the mobile network. Such trend is accompanied by ...
  • Self-X in SESAME 

    Pérez Romero, Jordi; Sallent Roig, José Oriol; Ruiz, Cristina; Betzler, August; Sayyad Khodashenas, Pouria; Vahid, Seiamak; Nasr, Karim M.; Abubakar, Babangida; Whitehead, Alan; Goratti, Leonardo (2016)
    Conference lecture
    Restricted access - publisher's policy
    This paper addresses the use of Self-X functions to support Small Cell as a Service (SCaaS) provisioning in multi-tenant scenarios, as one of the main components of the SESAME project. After presenting the scenarios, ...
  • SENSEFUL: An SDN-based joint access and backhaul coordination for Dense Wi-Fi Small Cells 

    García Villegas, Eduard; Sesto Castilla, David; Zehl, Sven; Zubow, Anatolij; Betzler, August; Camps Mur, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Open Access
    Dense Small Cell networks are considered the most effective way to cope with the exponential increase in mobile traffic demand expected for the upcoming years and are one of the foundations of the future 5G. However, novel ...
  • Should we use the default protocol settings for networks of constrained devices? 

    Betzler, August; Gómez Montenegro, Carlos; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (2012)
    Conference report
    Restricted access - publisher's policy
    Constrained devices will play a crucial role in the Internet of Things. These devices use communication technologies which often support the formation of wireless multihop topologies. Therefore, end-to-end data transfer ...