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Network data predicating method of wireless sensor

A wireless sensor, network data technology, applied in wireless communication, wireless communication services, advanced technology and other directions, can solve the problems of high computational overhead and high energy consumption, and achieve the effect of small computational cost, high flexibility and good practicability

Active Publication Date: 2017-07-18
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to aim at the disadvantages of high energy consumption and large calculation overhead in the traditional method. Therefore, a new data prediction method is proposed. Taking the cluster in the wireless sensor network as the unit, each The cluster head of the cluster is responsible for data prediction, which can effectively guarantee the accuracy of data prediction, and has good versatility and practicability

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0037] The concrete flow process of the inventive method is as figure 2 As shown, the specific steps are as follows:

[0038] Step 1: Carry out clustering and elect a cluster head according to a certain clustering algorithm. The clustering algorithm must be able to select a node with strong computing power to serve as the cluster head. After the clustering ends, the cluster head obtains the ID of the non-cluster head nodes in the cluster (marked as ID i , 1=<i<=n) and the total number n, and set the number k of stored data (for data prediction) (the choice of k is related to the accuracy of data prediction, the larger the value of k, the more The larger the amount of predicted data, the more accurate the predicted result, but at the same time it will consume a larger memory space and cause higher computing overhead). After completing the selection of k va...

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Abstract

The invention discloses a network data predicating method of a wireless sensor. First, clustering is performed according a clustering algorithm and a cluster head is elected. The cluster head obtains IDs of non-cluster-head nodes in the cluster and the total quantity n and sets the entry number of storage data. After the cluster head obtains the data, the data is recorded and saved in a memory. Calculation is performed on a value of each node in each new record and the residual and the error of a target value are obtained and saved. When the record entry number in the memory equal to k, data predication is performed and weight is allocated to all the nodes selected for data predication and value of the latest cluster head calculation is modified and correction direction and step size are determined. The method provided by the invention is high in flexibility, small in calculation amount, low in energy consumption and high in precision. Besides, the method provided by the invention is easy to implement, high in practicability and easy for use in practical environments.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor network and data prediction, and in particular relates to a data prediction method of wireless sensor network. Background technique [0002] Wireless sensor network (Wireless Sensor Network, WSN) is a typical distributed network, which contains a large number of sensor nodes, which are usually deployed in various environments to collect data. Through the historical data collected in the wireless sensor network, future data or trends can be predicted. For example, predict the temperature of some key areas in the forest to judge whether there is a risk of fire, predict the trend of smog in the next few days, and remind the general public to take corresponding precautions in a timely manner. [0003] The data collected by wireless sensors has the characteristics of multiple sources, that is, due to the high density of nodes in the network, the sampling values ​​of the nodes that are closer i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/00H04W52/02
CPCH04W4/38H04W52/0209Y02D30/70
Inventor 黄海平张凯何凡吴鹏飞胡林康杜安明王汝传沙超
Owner NANJING UNIV OF POSTS & TELECOMM