Speaker
Description
Conclusions and Future Work
A functional prototype, based on DORII middleware, which provides Grid CP applications with data from a remote WSN was developed. This prototype was later improved with observations handling and services which are in conformity with the OGC SWE standards. Although valuable, some weaknesses of DORII were identified. In the future, a QoS should be used to guarantee that applications perform in real-time. Another issue to address in the future is power consumption control in sensors.
Impact
The present approach allows CP people to access the Grid in a friendly way, for doing tasks such as remote monitoring and data collection. The collected data may be used by Grid running simulations in forecasting, comparison and integration tasks. This data is of greater importance in emergency situations. In these scenarios, the CP people may quickly request updated data from the disaster site, if a sensor network is deployed to that place, and take more appropriate decisions based on that real time raw data, or even based on simulations run over the raw data.
Detailed analysis
DORII middleware was already successfully tested with several instruments, in order to integrate instruments into the Grid, to perform a remote control and monitoring, and to apply the resulting data into Grid jobs or in dissemination. In the present case, the middleware was tested with a particular instrument – a WSN - and with realistic parameters, to simulate in an effective and user friendly way, as it is required by CP applications. We implemented an Instrument Element and several Instrument Managers (IMs), which virtualize the WSN. We also developed a Custom Java interface (CJI) to connect the IMs with sensors, performing the translation of the commands/data exchanged between IMs and sensors. Since it was intended to have a long duration-offline monitoring, additional modules were implemented to manage this issue, saving the data in a database. A Sensor Observation Service (SOS), following OGC standards, was implemented. The users access the database through the SOS.
URL for further information
http://pop.cp.di.uminho.pt/cyclops/
Keywords
Civil Protection, Grid middleware, wireless sensor network, Web service, OGC standards
