Time synchronization method based on multi-node networking
A time synchronization and multi-node technology, applied in the direction of synchronization devices, wireless communications, electrical components, etc., can solve the problems of poor convenience and limited applicability, and achieve the effect of increasing mobility and flexibility
Active Publication Date: 2021-03-26
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology
The first two methods need to build data exchange paths in advance, and the last method needs to build fiber optic links in advance. These methods are not convenient and are mostly suitable for time synchronization between a small number of nodes.
Especially for multi-node time synchronization in a dynamic environment, the applicability of the above method will be more limited
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[0027] The present invention is further explained below in conjunction with the accompanying drawings and examples, and the present invention includes, but is not limited to the following examples.
[0028] The technical solution used in the present invention to solve its technical problem includes the following steps:
[0029] 1) According to the wireless time synchronization, the number of actual application scenarios, the selected time synchronization reference node, the reference node is generally selected at the device or system with atomic clock to ensure that the time synchronization of the quasi-level level is achieved;
[0030] Wireless time synchronization node determination strategy is:
[0031] There are independent devices that are timely demand, and there is no public reference time signal between the device and other devices, and a node synchronized at this type of device can be established. If multiple device utility reference time signals, a node that can be set u...
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The invention provides a time synchronization method based on multi-node networking. The time synchronization method mainly comprises five parts of node number determination, node level determination,relative time delay calibration, phase initial synchronization and clock source fine control. The hierarchical time synchronization network is established by utilizing the wireless time synchronization terminals and the bidirectional time comparison principle through determination of the nodes and the hierarchical relationship, so the adaptive networking among the wireless time synchronization terminals is realized, time comparison with superior nodes is automatically completed, and initial phase synchronization of time signals of the whole network is rapidly realized; in combination with fine control of clock source frequency, the same frequency and the same phase between clock sources of the whole network are realized, and the application of a dynamic scene is supported.
Description
Technical field [0001] The present invention relates to a multi-node networking method for wireless time synchronization. Background technique [0002] With the development of wireless sensor networks, joint formations, etc., the synergy between multiple terminals needs to achieve seamless switching of work tasks, or implement a certain job directive, etc., these are High-precision time synchronization between multiple task nodes as a technical premise. Therefore, it is necessary to establish a convenient time synchronization networking method, adaptively increase or decrease time compared to the number of work nodes within the network, and does not affect the normal operation of other nodes. [0003] The Internet Network Time Technology and Wireless Network Access Techniques can achieve multiple nodes time synchronization, or can get rid of the traditional wired network timing in the dynamic environment, but the accuracy is low, only more than a hundred microseconds, can not mee...
Claims
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Login to View More IPC IPC(8): H04W56/00
CPCH04W56/0015
Inventor刘音华李孝辉李会锦王嘉琛
OwnerNAT TIME SERVICE CENT CHINESE ACAD OF SCI