Research On Data Aggregation In Wireless Sensor Network

Wireless Sensor Networks(WSN) is currently one of the frontier and hot research fieldsin the world which has got much attention and possesses high integrative technology andmultidisciplinary profession. As wireless sensor technology growing rapidly, a wealth ofwireless sensor network(WSN) resources brought great convenience to people. To protect thecomprehensiveness of sensed data, numerous and dense-distributed sensor nodes will bedeployed in the sensor networks, and all nodes will send the collected data which carryamount of redundant information to the base station. As the power of sensor nodes is strictlylimited and it is difficult to change the battery, studies aiming at the energy efficiency ofWSN have always been the key and difficult problems in this research field. Data aggregationhas become one of the important technologies about saving energy for wireless sensornetworks. It can not only eliminate the redundant information of collected data and reducedata transfer volume, but also improve data accuracy and lower the energy consumption, thusprolonging the network lifetime effectively. Simultaneously, energy-efficient data aggregationalgorithm becomes the key point of data aggregation investigation.With the continuous operation of wireless sensor networks, new security problems suchas privacy preservation of aggregated results, tampering with or forging aggregation data,capture of sensor nodes and information disclosure of aggregation nodes will occur during theaggregation, which reduces the network communication cost. If the sensitive information isobtained by malicious nodes, the damage will be immeasurable. Therefore, it is significantlyimportant to research on the security problems of data aggregation. Based on the data fusiontechnology of wireless sensor network, we focus on how to design an energy efficient datafusion mechanism is analyzed. The main research work is as follows:1. We summarized and discussed the concept, system structure, security requirements,saving energy technology and application fields of the WSN.2. We proposed a improved algorithm of data fusion algorithm base on non-uniformdistribution double cluster head(I-DNDC).(1) According to the typical LEACH protocol and data fusion algorithm base on non-uniform distribution double cluster head, we gives an improved fusion algorithm of non-uniform distribution of dual cluster head, which consider two factors of node residual energyand distancing base station when choosing the ACH.(2) The instances show that this scheme can be effectively reduces the network energyconsumption.3. According to analysis the security of the data fusion technology, we summarizedsecurity attacks in confront of data fusion, at the same time, pointed out the characteristics ofeach attack behavior. This can provide a basis for the decision makers to select appropriatemethod.