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A Clock Synchronization Compensation Method Based on Locally Weighted Least Squares Method

A least-squares, local weighting technology, applied in time division multiplexing systems, electrical components, multiplexing communications, etc., can solve the problems of communication process influence, time sudden change, etc., to improve clock synchronization accuracy, improve accuracy The effect of improving the synchronization accuracy

Active Publication Date: 2021-08-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

If the local clock is directly corrected according to the clock error obtained by the clock synchronization protocol, the problem of time mutation may occur, resulting in the "backflow" and "fast forward" of the clock, which will affect the communication process

Method used

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  • A Clock Synchronization Compensation Method Based on Locally Weighted Least Squares Method
  • A Clock Synchronization Compensation Method Based on Locally Weighted Least Squares Method
  • A Clock Synchronization Compensation Method Based on Locally Weighted Least Squares Method

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Embodiment Construction

[0058] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0059] Such as figure 1 As shown, a wireless local area network system includes several synchronous host nodes (SM nodes), several synchronous client nodes (SC nodes) and a compression host node (CM node), wherein the synchronous host nodes and the synchronous client nodes are collectively referred to as synchronous nodes, each Each synchronization node has a unique serial number, the serial number of the synchronization host node is in the front, and the serial number of the synchronization client node is in the rear. All nodes have periodic local clock counts inside.

[0060] Such as figure 2 Shown, a kind of clock synchronization compensation method based on local ...

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Abstract

The invention discloses a clock synchronization compensation method based on the local weighted least squares method. The method first obtains the deviation between each synchronization node and the global clock through the clock synchronization algorithm; then uses the local weighted least squares method to fit the clock compensation function, and predicts The compensation value of each synchronization node in the next synchronization period; finally, by adjusting the clock rate, the clock error advance compensation is completed in the next synchronization period, and enters the next clock synchronization process until the communication is completed. The invention solves the problems of "backflow" and "fast forward" of time caused by the direct compensation method in the clock compensation process, and adopts a local weighting method to improve the fitting precision of the least square method, thereby improving the precision of clock synchronization.

Description

technical field [0001] The invention relates to a clock synchronization compensation method based on a local weighted least square method, and belongs to the technical field of wireless local area network communication. Background technique [0002] Under the background of "Internet +", the application of wireless network technology to the field of high-speed factory automation wireless communication has become a very potential research direction. High-speed factory automation wireless network has two basic requirements for wireless technology, one is the minimum sampling rate of 1kHz; the other is real-time data transmission. Existing wireless technology standards, including the three major wireless network standards for industrial process automation, cannot guarantee real-time data transmission and high sampling rate at the same time. In the mixed "wired-wireless" industrial network automation application, it is a good choice to use a wireless local area network based on ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06
CPCH04J3/0682
Inventor 高翔陈鑫
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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