Zwei anstehende Vorträge
Im Februar und März werden die Ergebnisse zum Thema Realisierung intelligenter Objekte auf zwei Vorträgen vorgestellt. Die Vorträge haben jeweils einen Schwerpunkt in der Umsetzung von Java auf drahtlosen Systemen bzw. in der Anwendung von M2M Technologien.
PECCS'12 24.-26. Februar, Rom
Dannies, A.; Palafox-Albarrán, J.; Lang, W. and Jedermann, R.: DYNAMIC JAVA COMPONENTS IN PERVASIVE SYSTEMS A review of the feasibility of dynamic data processing on wireless platforms
Abstract: A wireless sensor network (WSN), which is one type of pervasive system, has the goal of networking heterogeneous systems and communicating through a gateway. However, it is also necessary to provide dynamic features to wireless nodes for updating applications and services during runtime. Dynamic updates can be handled either by the intrinsic features of Java or by advanced frameworks such as MIDP or OSGi. This paper investigates the software background and the feasibility of these three options in the context of WSNs. Java Virtual Machines were tested on sensor nodes and gateways currently available on the market. Two synthetic benchmarks were utilized to compare their performance. In addition, we tested the performance of an exemplary algorithm for a real life application during transportation in food logistics. Our experimental results showed that the performance of the benchmarks varied by a factor of more than 50, depending on the platform. Nevertheless, our chosen example algorithm could be executed on all platforms within an acceptable amount of CPU time. Pre-processing of data can be applied on wireless devices to reduce communication volume and provide conclusions instead of raw data. However the use of advanced frameworks, enabling extended dynamisation, are so far very limited.
01.03.2012 ImViReLL'12 , Bremen
Javier Palafox-Albarrán, J., Dannies, A., Lang, W. and Jedermann, R.: Combining Machine-to-Machine Communications with IntelligentObjects in Logistics.
Abstract:The combination of Machine-to-Machine (M2M) communication and intelligent objects can largely improve the supervision of logistic processes. This requires global mobile communications and short-range wireless sensor nodes. We assembled a demonstrator using off-the-shelf hardware for tests and classroom experiments that shows the feasibility of implementation of the future Internet of Things. It includes the use of embedded devices to perform local intelligent data processing and allows an evaluation of the advantages of ubiquitous M2M communication on a laboratory scale. New software features can be deployed, either to the gateway-device in the form of OSGi-bundles or to the sensor nodes in the form of MIDlet-suites, by using M2M-technology. As an example, we programmed an algorithm for predicting temperature curves in a container using real acquired datasets. A gateway bridges the local and the global network. Sensor messages can be forwarded via email and SMS or be provided by a web server.