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One of the important applications of wireless sensor networks is in supervision systems in which the information of locations under the supervision of sensors is sent continuously to applicants. Due to the limitation of energy source in sensor nodes, designing the methods based on optimal consumption of energy in wireless sensor networks is of great importance. In this paper, based on query shared source, an improved method is proposed which is called IQSS (Improved Query Shared Source) to support more complex queries regarding the response message frequency. In addition, we have tried to balance the message dispatch overloading on shared nodes to increase the time of network connection, the aim of which is to prevent redundancy of data and reduce repetitive messages to increase the lifetime of wireless sensor networks. Simulations show that our method can save energy up to 18% compared with those previously applied when the queries have different frequencies.
Date of Conference: 6-10 Dec. 2010