The Experts below are selected from a list of 3930 Experts worldwide ranked by ideXlab platform

Joaquin Salvachua - One of the best experts on this subject based on the ideXlab platform.

  • evaluation of an iot Application scoped access control model over a publish subscribe architecture based on fiware
    Sensors, 2020
    Co-Authors: Alejandro Del Pozo, Alvaro Alonso, Joaquin Salvachua
    Abstract:

    The Internet of Things (IoT) brings plenty of opportunities to enhance society’s activities, from improving a factory’s production chain to facilitating people’s household tasks. However, it has also brought new security breaches, compromising privacy and authenticity. IoT devices are vulnerable to being accessed from the Internet; they lack sufficient resources to face cyber-attack threats. Keeping a balance between access control and the devices’ resource consumption has become one of the highest priorities of IoT research. In this paper, we evaluate an access control architecture based on the IAACaaS (IoT Application-Scoped Access Control as a Service) model with the aim of protecting IoT devices that communicate using the Publish/Subscribe pattern. IAACaaS is based on the OAuth 2.0 authorization framework, which externalizes the identity and access control infrastructure of Applications. In our evaluation, we implement the model using FIWARE Generic Enablers and deploy them for a smart buildings use case with a wireless communication. Then, we compare the performance of two different approaches in the data-sharing between sensors and the Publish/Subscribe broker, using Constrained Application Protocol (CoAP) and Hypertext Transfer Protocol (HTTP) Protocols. We conclude that the integration of Publish/Subscribe IoT deployments with IAACaaS adds an extra layer of security and access control without compromising the system’s performance.

Byung Kwen Song - One of the best experts on this subject based on the ideXlab platform.

  • international electronical committee iec 61850 mapping with Constrained Application Protocol coap in smart grids based european telecommunications standard institute machine to machine m2m environment
    Energies, 2017
    Co-Authors: Injae Shin, Byung Kwen Song
    Abstract:

    As power systems develop rapidly into smarter and more flexible configurations, so too must the communication technologies that support them. Machine-to-machine (M2M) communication in power systems enables information collection by combining sensors and communication Protocols. In doing so, M2M technology supports communication between machines to improve power quality and protection coordination. When functioning in a “smart grid” environment, M2M has been labelled by the European Telecommunications Standard Institute (ETSI). International Electronical Committee (IEC) 61850 as the most important standard in power network systems. As evidence, this communication platform has been used for device data collection/control in substation automation systems and distribution automation systems. If the IEC 61850 information model were to be combined with a set of contemporary web Protocols, the potential benefits would be enormous. Therefore, a Constrained Application Protocol (CoAP) has been adopted to create an ETSI M2M communication architecture. CoAP is compared with other Protocols (MQTT, SOAP) to demonstrate the validity of using it. This M2M communication technology is applied in an IEC61850, and use the OPNET Modeler 17.1 to demonstrate intercompatibility of CoAP Gateway. The proposed IEC 61850 and CoAP mapping scheme reduces the mapping time and improves throughput. CoAP is useful in the ETSI M2M environment where device capability is able to be limited.

Luciano Tarricone - One of the best experts on this subject based on the ideXlab platform.

  • an iot aware architecture for smart healthcare systems
    IEEE Internet of Things Journal, 2015
    Co-Authors: Luca Catarinucci, Danilo De Donno, Luca Mainetti, L Palano, Luigi Patrono, Maria Laura Stefanizzi, Luciano Tarricone
    Abstract:

    Over the last few years, the convincing forward steps in the development of Internet of Things (IoT)-enabling solutions are spurring the advent of novel and fascinating Applications. Among others, mainly radio frequency identification (RFID), wireless sensor network (WSN), and smart mobile technologies are leading this evolutionary trend. In the wake of this tendency, this paper proposes a novel, IoT-aware, smart architecture for automatic monitoring and tracking of patients, personnel, and biomedical devices within hospitals and nursing institutes. Staying true to the IoT vision, we propose a smart hospital system (SHS), which relies on different, yet complementary, technologies, specifically RFID, WSN, and smart mobile, interoperating with each other through a Constrained Application Protocol (CoAP)/IPv6 over low-power wireless personal area network (6LoWPAN)/representational state transfer (REST) network infrastructure. The SHS is able to collect, in real time, both environmental conditions and patients’ physiological parameters via an ultra-low-power hybrid sensing network (HSN) composed of 6LoWPAN nodes integrating UHF RFID functionalities. Sensed data are delivered to a control center where an advanced monitoring Application (MA) makes them easily accessible by both local and remote users via a REST web service. The simple proof of concept implemented to validate the proposed SHS has highlighted a number of key capabilities and aspects of novelty, which represent a significant step forward compared to the actual state of the art.

Zach Shelby - One of the best experts on this subject based on the ideXlab platform.

  • Californium: Scalable Cloud Services for the Internet of Things through CoAP
    2015
    Co-Authors: Matthias Kovatsch, Martin Lanter, Zach Shelby
    Abstract:

    Abstract—The Internet of Things (IoT) is expected to inter-connect a myriad of devices. Emerging networking and backend support technology not only has to anticipate this dramatic increase in connected nodes, but also a change in traffic patterns. Instead of bulk data such as file sharing or multimedia streaming, IoT devices will primarily exchange real-time sensory and control data in small but numerous messages. Often cloud services will handle these data from a huge number of devices, and hence need to be extremely scalable to support conceivable large-scale IoT Applications. To this end, we present a system architecture for IoT cloud services based on the Constrained Application Protocol (CoAP), which is primarily designed for systems of tiny, low-cost, resource-Constrained IoT devices. Along with our system architecture, we systematically evaluate the performance of the new Web Protocol in cloud environments. Our Californium (Cf

  • californium scalable cloud services for the internet of things with coap
    The Internet of Things, 2014
    Co-Authors: Matthias Kovatsch, Martin Lanter, Zach Shelby
    Abstract:

    The Internet of Things (IoT) is expected to interconnect a myriad of devices. Emerging networking and backend support technology not only has to anticipate this dramatic increase in connected nodes, but also a change in traffic patterns. Instead of bulk data such as file sharing or multimedia streaming, IoT devices will primarily exchange real-time sensory and control data in small but numerous messages. Often cloud services will handle these data from a huge number of devices, and hence need to be extremely scalable to support conceivable large-scale IoT Applications. To this end, we present a system architecture for IoT cloud services based on the Constrained Application Protocol (CoAP), which is primarily designed for systems of tiny, low-cost, resource-Constrained IoT devices. Along with our system architecture, we systematically evaluate the performance of the new Web Protocol in cloud environments. Our Californium (Cf) CoAP framework shows 33 to 64 times higher throughput than high-performance HTTP Web servers, which are the state of the art for classic cloud services. The results substantiate that the low overhead of CoAP does not only enable Web technology for lowcost IoT devices, but also significantly improves backend service scalability for vast numbers of connected devices.

  • the Constrained Application Protocol coap
    RFC, 2014
    Co-Authors: Zach Shelby, Klaus Hartke, Carsten Bormann
    Abstract:

    The Constrained Application Protocol (CoAP) is a specialized web transfer Protocol for use with Constrained nodes and Constrained (e.g., low-power, lossy) networks. The nodes often have 8-bit microcontrollers with small amounts of ROM and RAM, while Constrained networks such as IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs) often have high packet error rates and a typical throughput of 10s of kbit/s. The Protocol is designed for machine- to-machine (M2M) Applications such as smart energy and building automation. CoAP provides a request/response interaction model between Application endpoints, supports built-in discovery of services and resources, and includes key concepts of the Web such as URIs and Internet media types. CoAP is designed to easily interface with HTTP for integration with the Web while meeting specialized requirements such as multicast support, very low overhead, and simplicity for Constrained environments.

  • CoAP: An Application Protocol for Billions of Tiny Internet Nodes
    IEEE Internet Computing, 2012
    Co-Authors: Carsten Bormann, Angelo P. Castellani, Zach Shelby
    Abstract:

    The Constrained Application Protocol (CoAP) is a transfer Protocol for Constrained nodes and networks, such as those that will form the Internet of Things. Much like its older and heavier cousin HTTP, CoAP uses the REST architectural style. Based on UDP and unencumbered by historical baggage, however, CoAP aims to achieve its modest goals with considerably less complexity.

Matthias Kovatsch - One of the best experts on this subject based on the ideXlab platform.

  • Californium: Scalable Cloud Services for the Internet of Things through CoAP
    2015
    Co-Authors: Matthias Kovatsch, Martin Lanter, Zach Shelby
    Abstract:

    Abstract—The Internet of Things (IoT) is expected to inter-connect a myriad of devices. Emerging networking and backend support technology not only has to anticipate this dramatic increase in connected nodes, but also a change in traffic patterns. Instead of bulk data such as file sharing or multimedia streaming, IoT devices will primarily exchange real-time sensory and control data in small but numerous messages. Often cloud services will handle these data from a huge number of devices, and hence need to be extremely scalable to support conceivable large-scale IoT Applications. To this end, we present a system architecture for IoT cloud services based on the Constrained Application Protocol (CoAP), which is primarily designed for systems of tiny, low-cost, resource-Constrained IoT devices. Along with our system architecture, we systematically evaluate the performance of the new Web Protocol in cloud environments. Our Californium (Cf

  • californium scalable cloud services for the internet of things with coap
    The Internet of Things, 2014
    Co-Authors: Matthias Kovatsch, Martin Lanter, Zach Shelby
    Abstract:

    The Internet of Things (IoT) is expected to interconnect a myriad of devices. Emerging networking and backend support technology not only has to anticipate this dramatic increase in connected nodes, but also a change in traffic patterns. Instead of bulk data such as file sharing or multimedia streaming, IoT devices will primarily exchange real-time sensory and control data in small but numerous messages. Often cloud services will handle these data from a huge number of devices, and hence need to be extremely scalable to support conceivable large-scale IoT Applications. To this end, we present a system architecture for IoT cloud services based on the Constrained Application Protocol (CoAP), which is primarily designed for systems of tiny, low-cost, resource-Constrained IoT devices. Along with our system architecture, we systematically evaluate the performance of the new Web Protocol in cloud environments. Our Californium (Cf) CoAP framework shows 33 to 64 times higher throughput than high-performance HTTP Web servers, which are the state of the art for classic cloud services. The results substantiate that the low overhead of CoAP does not only enable Web technology for lowcost IoT devices, but also significantly improves backend service scalability for vast numbers of connected devices.

  • industry adoption of the internet of things a Constrained Application Protocol survey
    Emerging Technologies and Factory Automation, 2012
    Co-Authors: Christian Lerche, Klaus Hartke, Matthias Kovatsch
    Abstract:

    The Constrained Application Protocol (CoAP) has been designed for RESTful machine-to-machine communication, thereby enabling an Internet of Things. CoAP is based on the principles of the Web, but takes the limited resources of tiny embedded devices such as wireless sensor nodes into account. Despite being relatively new and only about to become an IETF Internet Standard, several implementations of the Protocol already exist — each with its own background and supported set of features. In this paper, we give an overview of current CoAP implementations and discuss the results of the first formal interoperability meeting, organized by the European Telecommunications Standards Institute (ETSI) in March 2012. We note that, despite the young age of the Protocol, interoperability between the participating implementations is very high, although the non-essential parts of the Protocol currently receive significantly less coverage and exhibit slightly more interoperability problems.

  • Actinium: A RESTful runtime container for scriptable internet of things Applications
    Proceedings of 2012 International Conference on the Internet of Things, IOT 2012, 2012
    Co-Authors: Matthias Kovatsch, Martin Lanter, Simon Duquennoy
    Abstract:

    Programming Internet of Things (IoT) Applications is challenging because developers have to be knowledgeable in various technical domains, from low-power networking, over embedded operating systems, to distributed algorithms. Hence, it will be challenging to find enough experts to provide software for the vast number of expected devices, which must also be scalable and particularly safe due to the connection to the physical world. To remedy this situation, we propose an architecture that provides Web-like scripting for low-end devices through Cloud-based Application servers and a consistent, RESTful programming model. Our novel runtime container Actinium (Ac) exposes scripts, their configuration, and their lifecycle management through a fully RESTful programming interface using the Constrained Application Protocol (CoAP). We endow the JavaScript language with an API for direct interaction with mote-class IoT devices, the CoapRequest object, and means to export script data as Web resources. With Actinium, Applications can be created by simply mashing up resources provided by CoAP servers on devices, other scripts, and classic Web services. We also discuss security considerations and show the suitability of this architecture in terms of performance with our publicly available implementation.