Extending SQL to Support QoS and Semantic Data Gathering in WSN
At high level, a sensor network can be modelled with a database view. Under such a view, declarative queries are the preferred way of interacting with sensor networks for data and information collection tasks. The most popular database query language is SQL that is based on a SELECT-FROM-WHERE theme. However comparing to traditional databases,sensor network database has its unique features like dynamic,approximate, unreliable, etc. Extensions to SQL query language are thus needed for uses in sensor networks. In this paper, two extensions to traditional SQL query language have been proposed, including QoS and semantics. QoS extensions allow an application to express the concerned factors during the planning and execution of a query. Semantic extensions enable the representation of high-level information on group activities of the objects in a sensor network. We describe the extensions and give some examples for illustration.
wireless sensor networks,query,SQL,QoS
Jun-Zhao Sun Jiehan Zhou
Academy of Finland;Department ofElectrical and In.formation Engineering,University of Oulu Oulu,FIN- Department ofElectrical and In.formation Engineering,University of Oulu Oulu,FIN-90014, Finland
国际会议
成都
英文
710-714
2010-06-23（万方平台首次上网日期，不代表论文的发表时间）