An efficient technique to discover sensor web registry services for WSN with QoS based Multi-layered SOA framework

Recently Wireless Sensor Network Services have potential usage in a wide range of application domain. However due to the solid and mature advancement of SWE standard, there is still one challenge is left that has to be addressed within this context i.e. discovery of Sensor Web Registry services throughout heterogeneous environment which raises several concerns like performance, reliability, and robustness. Many approaches and frameworks have been proposed to discover the sensor web registry services. Some of the approaches assume that the requests are placed in SOAP compatible formats while others focus on GUI based parametric query processing. We have formulated an approach that uses the Natural Language Query Processing which is a convenient and easy method of sensor data access in comparison to SQL or XML based Query Language like XQuery and XPath. We propose an architecture based on Multi-layered SOA Framework that organizes the method of sensor web registry service discovery in an efficient and structured manner by adding some new layers like Request Parser & Query Generator(RPQ), Service Verifier and Certifier (SVC) and Service Rank Calculator(SRC). We describe a typical weather sensor web service discovery where RPQ facilitates the processing of plain text request query to a most appropriate weather sensor web service and also an algorithm with implementation for a complete cycle of suitable sensor web registry service discovery according to requester´s functional and QoS requirements.