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Method of synchronization of wireless sensing network node

A wireless sensor network and node synchronization technology, applied in the direction of synchronization devices, wireless communication, communication between multiple stations, etc., can solve the problem that routing nodes cannot

Inactive Publication Date: 2009-07-29
吴鑫 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with this is that routing nodes cannot go to sleep to save power, so they have to use mains power or other infinite energy power supply methods

Method used

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  • Method of synchronization of wireless sensing network node
  • Method of synchronization of wireless sensing network node
  • Method of synchronization of wireless sensing network node

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Multiple nodes exist in a wireless network. Such as figure 1 shown. These nodes can be divided by function into synchronizers, routers, and terminal nodes. A synchronizer is a node in the network capable of sending initial synchronization frames. A router is a node in the network that can forward information. A terminal node is a node in the network that can send and receive information but does not forward information. Because it is divided by function, the synchronizer can be an independent dedicated node or be represented by other ordinary nodes.

[0027] Because the current crystal oscillator production technology is very mature, we can assume that in a wireless sensor network, the crystal oscillator drift of each node can be controlled within a limited range, which is a limited value, such as 40ppm. For any two nodes in the network, at the end of thei...

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Abstract

A wireless sensing network is a network structure comprising many nodes communicating with each other by wireless radio frequency mode; most of the nodes in the wireless sensing network are supplied power by cell; so the power consumption management of node is an important problem in wireless sensing network design. A radical solution to the problem is to make the nodes in sleep state with low power consumption in most time; and the node in sleep state must be able to wake synchronously to accomplish network function. The algorithm provides a synchronous mechanism, which comprises: a synchronizer exists in network for sending a synchronous frame; the synchronous frame is forwarded step by step by routers in the network to all the nodes; and the nodes in the network obtains the consistent clocks by using the synchronous frame and the synchronizer. By applying the mechanism described in the algorithm, almost all the nodes in a wireless sensing network can be supplied power by cell and can sleep periodically.

Description

technical field [0001] The technical field of the wireless sensor network system solves the node synchronization mechanism under the condition of low energy consumption of the network. Background technique [0002] A wireless sensor network is a network structure in which many nodes communicate with each other through radio frequency. Each node is generally composed of a sensing unit, a processing unit, and a communication unit, and some nodes have control units that control external mechanical systems or electrical systems. The main task of the sensing part is to read the data to be monitored into the node through a certain pattern. The communication unit is a radio frequency module, which is responsible for establishing a unified communication channel among various nodes and communicating with each other. The processing unit is responsible for processing the data received by the sensors and also for processing the data of the communication unit. The processing unit also...

Claims

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Application Information

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IPC IPC(8): H04W56/00H04B7/26
CPCY02D30/70
Inventor 吴鑫马永王辉
Owner 吴鑫
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