关键词: 无线传感网络, 关联度, 多查询优化, 节能

Abstract: Wireless Sensor Networks（WSNs） is a data-centric network.Users pose queries from a base station to the network to obtain the required data.One of design issues in WSNs is how to utilize multiple queries optimization to reduce energy consumption of sensor nodes and thus lifetime of the entire network can be prolonged.This paper proposes an Association Degree based Multiple Queries Optimization algorithm（ADMQO） in WSNs.In ADMQO，node chooses parent node by association degrees with its candidate parent nodes.As a result，nodes covered by the same set of queries are clustered into a group，so their values can be shared among multiple queries，and aggregate queries values can be efficiently merged in networks.These techniques can reduce the amount of transmission load in WSNs，thus extending the lifetime of wireless sensor networks.Theoretical analysis and simulation results show that the proposed algorithm can decrease the number of data transmitted，thus saving a lot of energy in the sensor nodes.

Key words: Wireless Sensor Networks（WSNs）, association degree, multiple queries optimization, energy efficiency