期刊名称：International Journal of Distributed Sensor Networks
印刷版ISSN：1550-1329
电子版ISSN：1550-1477
出版年度：2009
卷号：5
DOI：10.1080/15501320802520647
出版社：Hindawi Publishing Corporation
摘要：The technologies of wireless sensor networks (WSNs) have been developed rapidly in the most recent years. As WSNs are characterized by data-centric storage and routing under most circumstances, any application involved requires data management and processing technologies, especially the query processing mechanisms. The WSNs are often deployed in diverse application specific contexts, which can be treated as distributed databases. The event-involved responses can be obtained by issuing queries to this kind of database. Certain of the applications with real-time requirement have tight constraints on query delay. However, the existing query algorithms are not satisfied with them. The problem we focus on can be simply described as: once an event has happened, how to optimize the replication energy cost due to storing the event data from the event source to multiple positions and how to optimize the searching energy cost and query delay due to finding one replica of the event and copying the event data on demand if subsequent queries for the event are performed.
