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Time stamp jitter compensation method and system

A compensation method and compensation system technology, applied in time division multiplexing systems, synchronization devices, electrical components, etc., can solve the problems of not meeting the time synchronization requirements of 5G technology, difficult to achieve, etc., so as to improve the clock synchronization accuracy and reduce the impact. Effect

Active Publication Date: 2021-11-16
FENGHUO COMM SCI & TECH CO LTD +1
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  • Application Information

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Problems solved by technology

[0012] However, the above two methods are difficult to realize due to the limitation of hardware; after testing, the existing time synchronization method can only achieve a time error of ±200ns between the sending end and the receiving end, which does not meet the time synchronization requirements of 5G technology (the error is within ±5ns within)

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  • Time stamp jitter compensation method and system

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0034] The time stamp jitter compensation method in the embodiment of the present invention is applicable to messages with a time stamp, and the method includes the following steps:

[0035] The receiving end compensates the time stamp of this message according to the time interval between sending this message and the last message, and the receiving time interval between this message and the last message.

[0036] It can be seen that the present invention compensates and corrects the time stamp of this message through the sending time interval and receiving time interval of two adjacent messages; that is, avoids delay jitter and Time synchronization jitter not only significantly improves the clock synchronization accuracy, but also effectively reduces the impact of link delay jitter on synchronization stability; it does not need to consider th...

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Abstract

The invention discloses a time stamp jitter compensation method and system, and relates to the field of time synchronization. The method is applicable to messages with a time stamp, and the steps of the method include: the receiving end calculates the time interval between sending the current message and the last message, and the receiving time interval between the current message and the last message, Compensate the timestamp of this packet. The present invention compensates and corrects the time stamp of this message through the sending time interval and receiving time interval of two adjacent messages; that is, avoids delay jitter and time synchronization jitter through the sending time interval and receiving time interval, It not only significantly improves the clock synchronization accuracy, but can effectively reduce the impact of link delay jitter on synchronization stability; it does not need to consider the position of the timestamp record and the clock frequency, that is, it does not need to improve the hardware.

Description

technical field [0001] The invention relates to the field of time synchronization, in particular to a time stamp jitter compensation method and system. Background technique [0002] The PTP protocol (Precision Time Protocol, high-precision time synchronization protocol) or the 1588 protocol provides a mechanism for time synchronization of the Ethernet, using the symmetry and delay measurement of the network to realize the main The synchronization of the slave time makes the clock frequency and phase consistent between the slave device and the master device. [0003] see figure 1 As shown, the existing time synchronization method is: assume that the link delay between the master and slave stations is symmetrical, that is, the link delay Tms from the master station to the slave station=the link delay Tsm from the slave station to the master station . [0004] The slave clock of the slave station can calculate the time offset and link delay between it and the master clock of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06
CPCH04J3/0667H04J3/06H04W56/00
Inventor 陈驰吴倩
Owner FENGHUO COMM SCI & TECH CO LTD
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