Precision Configurable Data Aggregation Algorithm in WSNs
XU Xiao-bi · Dianzi xuebao · 2014
How to effectively suppress transmissions of WSN( Wiretess Sensor Net work) and prolong its lifetime has become a hot area of research for WSN. In cluster-based WSNs,a precision configurable data aggregation algorithm( PCDA)is proposed. Through PCDA,every node adapts its threshold based on recent historical data so that nodes can suppress transmissions fairly; the adaptive threshold can control the error of aggregations in real-time. Theoretical analysis and experiment results show that nodes can save energy effectively through PCDA. Compared with Bernoulli sampling based aggregation,MAEs( Mean Absolute Errors) of continuous queries of sum aggregation and average aggregation is much smaller through PCDA. Furthermore,PCDA needs no future knowledge,making it usable and adaptive in many WSN applications.