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Clock synchronizing method for wireless sensor network

A wireless sensor, network clock technology, applied in the direction of synchronization device, wireless communication, communication between multiple stations, etc., can solve high network traffic overhead and computational complexity, increase packet routing delay variance packet transmission overhead , without considering the problems of data packet collision or even loss, to achieve the effects of accurate time synchronization, accurate clock drift, and accurate transmission delay

Inactive Publication Date: 2009-11-25
SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
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Problems solved by technology

This algorithm has high network traffic overhead and computational complexity
[0004] None of the above algorithms take into account that the broadcast nature of the wireless medium causes data packet collision or even loss, which increases the delay variance of data packet routing and the overhead of data packet transmission.

Method used

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  • Clock synchronizing method for wireless sensor network
  • Clock synchronizing method for wireless sensor network

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Embodiment Construction

[0019] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention:

[0020] Refer to the attached figure 1 and 2 , based on the wireless sensor network clock synchronization method of the technical solution of the present invention, the method first constructs the wireless sensor network into a tree network topology, and takes the time value of the root node as the reference time, and the root node and the base station of the network pass a pair -wise algorithm synchronization; then the root node broadcasts a synchronization packet containing the time information of the root node along each subtree, and the parent node of each subtree and its child nodes are synchronized through the pair-wise algorithm, and finally make each subtree and each layer Synchronization; further, until each node of the tree network has a unified time signal. ...

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Abstract

The invention discloses a clock synchronizing method for a wireless sensor network. The clock synchronizing method for the wireless sensor network comprises the following steps: firstly, constructing the wireless sensor network into a tree network topology, using the time value of a root node as a reference time, and synchronizing the root node and a base station of the network through pair-wise algorithm; then, broadcasting a synchronous data packet containing time information of the root node along each subtree by the root node, and synchronizing a father node of each subtree and a child node thereof through the pair-wise algorithm; and finally synchronizing layers of each subtree till each node of the tree network has a unified time signal. Based on the technical proposal, the clock synchronizing method for the wireless sensor network can improve the transmission capacity of the data packet and effectively improve the synchronizing precision.

Description

(1) Technical field [0001] The present invention relates to a clock synchronization method for a wireless sensor network. A sensor node is also called a wireless transmitter, which is a device with functions of perception, calculation, storage and communication. The wireless sensor network refers to a network composed of sensor nodes. (2) Background technology [0002] The wireless sensor network formed by integrating the four major technologies of sensor, embedded computing, network and wireless communication is a new information acquisition and processing technology, which can collaboratively monitor, perceive and collect information of various environments or monitoring objects in real time. , and process it. Time synchronization is an important issue for all distributed systems. Accurate time synchronization is also of great significance to the design and application of sensor networks. Sensors are required in data aggregation algorithms, positioning algorithms, and ener...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04B7/26
Inventor 魏诺郭强孔祥龙刘瑞霞吕家亮
Owner SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
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