1,721,109 research outputs found
Proceedings of the 6th international workshop on middleware tools, services and run-time support for networked embedded systems
No full textWelcome to the proceedings of the 6th International Workshop on Middleware Tools, Services and Run-time Support for Networked Embedded Systems (MidSens'10). This year's workshop builds on the success of MidSens'06 in Melbourne, MidSens'07 in Newport Beach, MidSens'08 in Leuven, MidSens'09 in Urbana-Champaign and MidSens'10 in Bangalore. This year's workshop took place in Lisbon, Portugal on December 12th 2011.
The MidSens workshop series has contributed to the definition of appropriate middleware architectures and programming models for networked embedded systems. This year's workshop continues this tradition with four excellent papers.
The paper by Seeger et al. reviews practical issues arising from a real-world sensor network deployment. Matthys et al. contribute language support for modeling dynamism in sensor networks. Raychoudhury et al. introduce a novel approach for querying pervasive devices. Finally, Cecílio et al. provide mechanisms to configure and manage heterogeneous sensor network systems.status: Publishe
DAViM: a dynamically adaptable virtual machine for sensor networks
Full text linkSensor networks are being deployed for substantial periods of activity, and are being used by multiple applications with possibly diverse requirements. Since manually upgrading or updating sensor software is often impossible, run-time software reconfiguration represents a considerable success factor for many practical usage scenarios of sensor networks. This paper presents DAViM, the Distrinet Adaptable Virtual Machine and describes how it allows to customize sensor behavior, to extend its functionality and to execute multiple applications in parallel. We have evaluated the proposed architecture by implementing a proof-of-concept prototype on micaZ hardware. First results indicate that it is already feasible to run the DAViM core on micaZ hardware, while memory requirements of the full DAViM implementation are close enough to fit on more recent sensor hardware.sponsorship: ACMstatus: Publishe
On the integration of sensor networks and general purpose IT infrastructure
Full text linkIntegrating sensor networks with general purpose IT infrastructure has been confirmed as a complex problem in the development and management of industrial sensor applications. This integration is complex because a single general purpose application queries multiple sensor networks
and a single sensor network has to serve multiple applications. This paper identifies three challenges that need to be addressed by middleware in order to enable this integration: federated management, interoperability and adaptability across the whole infrastructure. The paper presents a taxonomy of middleware solutions and positions the identified challenges in a survey of state-of-the-art middleware research we conducted earlier. By looking at sensor network middleware from an application (business) perspective, we come to the conclusion that time may have come to consolidate middleware efforts presented during the past years.status: Publishe
Flexible integration of data qualities in wireless sensor networks
Full text linkWireless sensor networks have been confirmed as a valuable asset to deploy in an increasing number of real-world business scenarios. The existence of several run-time reconfigurable component models for networked embedded systems facilitates this as they enable developers to build complete end-to-end systems composed of reusable building blocks. However, the integration of sensor networks with enterprise environments is not straightforward as it requires that several long-standing challenges related to data quality management and security be addressed. This paper advocates a high-level policy-based approach to more easily support the specification and enforcement of these non-functional requirements in existing component compositions for network embedded systems. We have realized and evaluated a prototype of this framework for the LooCI component model.status: Publishe
DARMA: adaptable service and resource management for wireless sensor networks
Full text linkThis paper argues that service oriented architectures provide a good mechanism for managing outside interaction with software resources on wireless sensor networks. Specifically, this paper introduces a lightweight service platform designed to meet the specific characteristics of wireless sensor networks. The proposed architecture provides lightweight, yet flexible service-level agreements, together with adaptive management of sensor network resources. Critically for resource constrained sensor networks, our framework ensures that services are shared in an optimal manner between multiple client applications, while providing autonomic mechanisms to reason about fault tolerance and optimization. Furthermore, our approach actively promotes point of action processing which provides significant benefits in both embedded and enterprise deployments. We illustrate the appropriateness of the proposed architecture through a prototype implementation and evaluation using the LooCI component model and the SunSPOT platform.sponsorship: IFIP
USENIXstatus: Publishe
Language and middleware support for dynamism in wireless sensor and actuator network applications
No full textNowadays, advances in wireless sensing and actuation technology allow for reasonable amounts of application logic to be embedded inside wireless sensor networks. Such applications are more autonomous, but also significantly more complex to program and manage. First, in-network adaptations need to be supported due to the long-lived nature of the network. Second, the intrinsic dynamism of the network challenges how applications interact with each other. Third, as applications become more complex, coordinating their interactions becomes more difficult. This paper explores how the integration of an event-based component middleware, a policy-based management system, and a domain-specific coordination language gives rise to comprehensive support for developing and managing this new breed of applications. © 2011 ACM.status: Publishe
Trusted Operations On Mobile Phones
No full textThe widespread use of mobile devices has allowed the development of participatory sensing systems that capture various types of data using the existing sensors on mobile devices in order to upload the data to cloud based services for later use. Gathering data from such sources requires a mechanism to establish trust on the sensor data. For example an application may require a proof of authenticity of sensor readings originating from anonymous sources. Establishment of trust on the sensor data has been addressed in the literature. However, in many cases this sensor data needs to be preprocessed on the device itself before being uploaded to the target server. This processing could include resizing of images, hiding identifiable faces and sensitive data in images, anonymization of GPS data etc. while ensuring the chain of trust from data capture to the delivery of data to the consumer. There is a need for a framework that provides a means to implement arbitrary operations to be performed on trusted sensor data while guaranteeing the authenticity of the data. This paper presents the design and implementation of a framework that allows the capture of trusted sensor data, the development of trusted operations on sensor data, and provides a mechanism for performing predefined trusted operations on the sensor data such that the chain of trust is maintained. Evaluation shows that the performance of the proposed system is reasonable and that the trust guarantees are strong.sponsorship: This research is partially funded by the research fund KU Leu-
ven, the ICON-SeRGIo project and the HI 2 -DT/Universal4Mobile
project.status: Publishe
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
CRAM: Robust Medium Access Control for LPWAN using Cryptographic Frequency Hopping
No full textLow power wide area networks (LPWANs) are being applied in many Internet of Things applications around the globe. These technologies offer economic coverage of wide areas, while retaining low power operation. LoRaWAN is a key technology in this space, with a world-wide presence and millions of devices deployed in the field. Despite this early success, recent research has shown that LoRa performs poorly in dense deployments with a high degree of contention. Furthermore, LoRa is not robust against selective jamming attacks. In this paper, we propose CRAM: a cryptographic frequency hopping MAC protocol designed for the LoRa physical layer that reduces contention by fairly exploiting all available frequency space, while making it significantly more difficult to perform selective jamming. Our evaluation shows that CRAM significantly reduces contention, thereby dramatically increasing scalability and reliability in comparison to the standard LoRa protocol.sponsorship: This research is partially funded by the research fund KU Leuven and the Flemish Research Programme Cybersecurity. (KU Leuven, Flemish Research Programme Cybersecurity)status: Publishe
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