Service oriented sensor web

Abstract

In this chapter, we have introduced a new buzzword: Sensor Web in the research and academic community of sensor and sensor networks. There are a lot of efforts that aim to provide middleware support to the sensor development. Among those, the most important one is OGC's SWE standard that standardises the vision of Sensor Web. SensorML, O&M, SCS, SPS and WNS together, to create an integration platform to register, discover and access anonymous and heterogeneous sensors distributed all over the world through internet. A service oriented Sensor Web framework named Open Sensor Web Architecture (OSWA) has been discussed along with the design implementation of the core services targeting the sensor applications running on top of TinyOS. OSWA extends SWE and provides additional services to process the information collected from those resources accompanied by computational grids. In addition, the experiment of the scalability and performance of the prototype system is also presented. Although, the services are all working properly with acceptable performance, we are still at an early stage of having the entire OSWA implemented. Even those services that we have implemented are not yet fully functional. The Sensor Collection Service is the key component of the entire OSWA, which affects the performance and reliability of the entire system. A lot of issues are left to future investigation, focusing on aspects of reliability, performance optimisation and scalability. There are a couple of efforts that are needed to be made to enhance the SCS and other services in the next stage. © Springer-Verlag Berlin Heidelberg 2007.