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Distributed network time synchronization method

A distributed network and time synchronization technology, applied in time division multiplexing systems, electrical components, multiplexing communications, etc., can solve problems such as poor precision, achieve good real-time performance, high-precision time synchronization, and convenient application quick effect

Active Publication Date: 2016-06-15
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

[0004] Aiming at the technical problem of poor precision existing in the time synchronization method in the prior art, the present invention discloses a distributed network time synchronization method

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Embodiment Construction

[0017] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] The invention discloses a distributed network time synchronization method, which specifically includes the following steps:

[0019] Step 1. Determine the central node of the wireless network, and the central node broadcasts a signal carrying the characteristic information of the central node to the entire network; the signal can be a radio signal or other types of signals, and the central node characteristic signal broadcast by the central node can include The communication protocol of the networking and the signal flag of the central node have characteristic information that can mark the central node. Such as figure 1 The schematic diagram of the broadcast characteristic signal of the central node is shown.

[0020] Step 2. After each terminal node receives the central node characteristic signal broadcast by the centr...

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Abstract

The invention belongs to the time synchronization technical field and discloses a distributed network time synchronization method. The method includes following steps that: the difference of the clock of a center node and the clock of terminal nodes is determined; after receiving time synchronization request signals sent by different terminal nodes through different carrier frequencies, the center node captures, tracks and demodulates the request signals by using a local spread spectrum sequence database so as to obtain terminal node serial numbers, request sign information and terminal node clock information contained in the request signals, and center node clock information is compared with the local clock of the center node, time difference is measured; and offset correction is performed on the local clock of the terminal nodes according to the difference of the clock of the center node and the clock of the terminal nodes. Through synchronization, accuracy can reach a level of several hundreds of nanoseconds or even a level of dozens of nanoseconds.

Description

technical field [0001] The invention relates to time synchronization technology, in particular to a distributed network time synchronization method, which realizes high-precision time synchronization of the distributed network. Background technique [0002] The purpose of time synchronization is to calibrate different "times" so that their respective time relative deviations are 0 or very small. For large-scale systems, time synchronization is the basis for the normal operation of the system and the information interaction of each terminal. Time synchronization is the premise of establishing the connection link of each terminal. The system regards a certain terminal in the system as the central node, and other terminals obtain the clock of the central node through clock information interaction with the central node, and then adjust the local clock. Nodes are consistent to complete time synchronization. At present, more time synchronization technologies are used as long as ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0638
Inventor 王淑君李鹏程冉一航李津杨峰
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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