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Research on Data Fusion Technology of Wireless Sensor Network

Author: ZhangWenChao
Tutor: YaoFangWu
School: Nanjing University of Posts and Telecommunications
Course: Computer System Architecture
Keywords: Wireless sensor networks Data Fusion Reputation model Cluster - tree network structure
CLC: TN929.5
Type: Master's thesis
Year: 2012
Downloads: 152
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Abstract

Since the beginning of the 21st century, in the embedded technology, wireless communication technology and distributed technology driven, the rapid development of wireless sensor network technology matures, and has been highlighted as one of the hot research areas of wireless network, in the military, medical, reflect the unique advantages of industry, agriculture and other aspects of the application so that it could be more widely appreciated. From the general sense, the wireless sensor network is constituted by an embedded sensing devices deployed in large numbers in the target area to perform specific monitoring tasks through multi-hop, self-organizing wireless network. But unlike traditional wireless network, there are a lot of restrictions in terms of network life, communication bandwidth, computing power, and hinder further large-scale application. The idea of ??data fusion is a lot of perception combination of information from different data sources closer to the user needs and a smaller amount of data fusion results in the fusion process, thereby helping to eliminate duplication of information, reduce data traffic and transmission collisions get rid of the energy constraint in wireless sensor networks to extend the life cycle, and at the same time improve the efficiency and accuracy of data collection. Therefore, the study of the wireless sensor network data fusion technology is very valuable. The main work done in this paper is to summarize the wireless sensor networks and data fusion technology development status based on analysis of the problems of existing technology, focusing on proposed its own set of practical wireless sensor network data fusion program. Of first fusion from the security point of view, to construct a wireless sensor networks based on trust closeness degree credibility model RMSMTV node malicious evaluation of existing reputation models, the model can effectively solve too many subjective factors in the evaluation process problems for data fusion to carry out a credible and reliable security environment. Integration program based on the network setup phase of the cluster - tree topology, and implemented through two stages of the network settings and stable work cycle: Considering the trust value of the node and its own energy factors elect cluster head node, and the establishment of an inter-cluster routing tree; stable session, the cluster head node in accordance with good transmission slots assigned sequentially receives the sensory data of the nodes in the cluster members monitoring, and first in the local multiple copies of data fusion as a fusion result, and then along the inter-cluster The routing tree forwarded to its parent node, so until it reaches the root node, and ultimately from the root node of the monitoring report on the results of the whole network to the base station. Data fusion in cluster head in order to avoid the interference of the outside noise and other adverse factors, the homogeneity measure the ratio of the mean and standard deviation as the data involved in the integration of the weighted proportion of effectively excluded \, to ensure that the fusion accuracy of the results.

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