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Method and system for network clock synchronous

A network clock and clock synchronization technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve the problems that wireless sensor networks cannot be applied to large-scale industrial sites and system crashes.

Inactive Publication Date: 2007-12-19
SUPCON GRP +1
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  • Abstract
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Problems solved by technology

[0006] The problem to be solved by the embodiments of the present invention is to provide a network clock synchronization method and system to solve the system crash caused by the failure of the wireless sensor network clock source and the problem that the wireless sensor network cannot be applied to large-scale industrial sites

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Embodiment Construction

[0106] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0107] The embodiment of the present invention provides a method for network clock synchronization, please refer to Figure 1, which specifically includes the steps:

[0108] Step S101: Set up redundant clock source nodes in the network, and realize clock synchronization between the redundant clock source nodes, and set at least one working clock source node, and set other redundant clock source nodes as backup clock sources node;

[0109] Step S102: Select a regional main clock node from the common nodes of the network, and use the working clock source node as the head of the team, the standby clock source node as the queue tail, and the regional main clock node as a member to form a synchronization queue;

[0110] Step S103: the regional master clock node requests clock synchronization from its previous node in the synchronization queue, and the com...

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Abstract

This invention discloses a method and a system for synchronizing network clocks, which sets synchronous source nodes with mutual redundance in a wireless sensor network to design them a working clock node and a backup clock source node and selects a regional master clock node in network node to form a synchronous queue, the network node asks for clock synchronization to the nodes in the synchronous queue, the backup clock source node computes the mean queue synchronous clock based on the difference between the local clock and the synchronous clock of the working clock node and sends it to the regional master clock node in the queue so as to realize clock rectification to the regional master clock.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and system for network clock synchronization. Background technique [0002] With the development of wireless technology, microelectronics technology, and sensor technology, wireless sensor networks have attracted more and more attention from academia and industry because of their huge application prospects. The high-precision clock synchronization of each node in a wireless sensor network is an important The premise of the application of the sensor network in the industrial field with high real-time requirements is also the basis for realizing communication scheduling between nodes. In the current wireless sensor network, a working clock source node is set, and a certain number of network nodes are set as regional master clock nodes, and the regional master clock nodes form a synchronization queue to request synchronization from the working clock source node; The o...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04B7/26
Inventor 冯冬芹褚健章涵方瑜
Owner SUPCON GRP
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