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Method for high-efficiency data fusion in wireless sensor network

A data fusion and network technology, applied in data exchange networks, data exchange through path configuration, transmission systems, etc., can solve problems such as efficient data fusion, and achieve the effect of improving fusion gain, ensuring network real-time performance, and improving fusion effects.

Inactive Publication Date: 2009-07-01
INST OF SOFTWARE - CHINESE ACAD OF SCI
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Problems solved by technology

Furthermore, the fusion time allocation problem is attributed to a nonlinear multivariate optimization problem, and the fixed-step hill-climbing method is used for multiple rounds of time allocation, which solves the problem of high-efficiency data acquisition under delay constraints in periodic data acquisition applications. fusion problem

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  • Method for high-efficiency data fusion in wireless sensor network
  • Method for high-efficiency data fusion in wireless sensor network
  • Method for high-efficiency data fusion in wireless sensor network

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Embodiment Construction

[0042] Attached below Figure 5 The present invention will be further described in detail with specific embodiments: the data fusion method of the present invention divides the network operation period into a plurality of fixed-length periods, and each period is divided into an initialization phase and an actual operation phase. In the initialization phase, the collection of network routing information, the distribution of node fusion time and the distribution of calculation results are completed. In the actual operation stage, the nodes only need to refer to the allocation results for integration and wait. In the network initialization phase, the sink node (SINK) first initiates route establishment by broadcasting a query message (REQUEST message). After receiving the REQUEST message, the sensor node returns a response message (RESPONSE message) according to certain routing rules, and passes the information piggyback method. It conveys its own routing status information (suc...

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Abstract

The invention discloses an efficient data fusion method for a wireless sensor network (WSN), which comprises the following steps: establishing an adjustable node set and setting an initial probing step size; calculating the fusion contributions of all elements in the adjustable node set according to the probing step size; selecting a node corresponding to the maximal value of fusion contribution; judging whether the total fusion time-lag of the node meets a time-lag restriction; adjusting node fusion waiting time or deleting nodes which do not meet the time-lag restriction from the adjustable node set; repeating the procedures until the adjustable node set is null; stopping adjusting the fusion waiting time; issuing the fusion waiting time of the node; and conducting data fusion. The method has low complexity and message communication traffic, ensures real-time property of the network, effectively reduces energy consumption of the node, prolongs the life cycle of the network, remarkably improves fusion effect, and is suitable for different topological networks.

Description

technical field [0001] The invention relates to a data fusion method, in particular to a wireless sensor network efficient data fusion method, belonging to the field of wireless sensor networks. Background technique [0002] A wireless sensor network is composed of a large number of sensing nodes, which transmit information hop by hop through wireless communication, and cooperate to complete the task of information collection in the covered area. The information has a certain real-time nature, that is, it is required to be transmitted to the user within a certain period of time. The nodes of the sensor network are usually powered by batteries, and the energy consumption must be reduced as much as possible. The data fusion method is a method for the transit node to use the redundancy of information to process multiple pieces of information to obtain one or a small amount of information to reduce network communication overhead. After receiving a piece of data, the node perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L1/16H04L12/28H04L45/74
Inventor 皇甫伟孙利民周新运段斌
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI
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