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Method, equipment and system for transmitting message bearing time

A technology for transmitting bearer and time, applied in the field of communication, can solve problems such as large jitter, asymmetrical transmission delay of DSL equipment, inability to widely apply DSL lines, etc., and achieve the effect of time synchronization

Inactive Publication Date: 2014-09-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical solution provided by the existing technology requires the system to be jitter-free and have a symmetrical delay, but for the most widely used DSL (Digital Subscriber Line, Digital Subscriber Line) access equipment at present, due to the complexity of the DSL technology itself, the DSL equipment The transmission delay is asymmetrical and the jitter is large, so the existing technology cannot be widely applied to DSL lines

Method used

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  • Method, equipment and system for transmitting message bearing time
  • Method, equipment and system for transmitting message bearing time
  • Method, equipment and system for transmitting message bearing time

Examples

Experimental program
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Embodiment 1

[0037] see figure 1 , this embodiment provides a method for transmitting a time-bearing message, and the process of the method is as follows:

[0038] 101: Receive a time-carrying message, and the time-carrying message is marked with timestamp information;

[0039] 102: According to the local real-time time information and the marked time stamp information of the message carrying the time, calculate the delay information of the message carrying the time during transmission;

[0040] 103: According to the calculated delay information, perform delay compensation on the packet with the bearer time, and forward the packet with the bearer time after the delay time meets the preset delay requirement.

[0041] Wherein, this embodiment does not limit the preset delay requirement, which may be set according to actual conditions during specific implementation.

[0042] The method provided in this embodiment performs delay compensation on the received message with the bearer time, and ...

Embodiment 2

[0044] This embodiment provides a method for transmitting a message with a bearer time. The method provides a solution for transmitting a message with a bearer time for a DSL system that uses Symbol as a data unit for data transmission, so that the DSL system can transmit a bearer time message through transmission. The time message realizes the time synchronization of the system.

[0045] For ease of description, this embodiment takes the 1588 packet defined by the IEEE1588 standard protocol as an example to carry the time packet. The reason why the IEEE1588 standard protocol satisfies high-precision time synchronization between network units is that the basic principle is to periodically correct the clocks of all nodes in the network through synchronization signals. like figure 2 As shown, where D1 is the path delay from the master clock to the slave clock, D2 is the path delay from the slave clock to the master clock, and the deviation between the slave clock and the maste...

Embodiment 3

[0071] see Figure 9 , this embodiment provides a device for transmitting a time-bearing message, the device includes:

[0072] The receiving module 901 is configured to receive a message carrying time, and the message carrying time is marked with timestamp information;

[0073] The calculation module 902 is configured to calculate the delay information of the bearer time message during transmission according to the local real-time time information and the marked time stamp information of the bearer time message received by the receiving module 901;

[0074] The delay compensation module 903 is configured to perform delay compensation on the bearer time message according to the delay information calculated by the calculation module 902, until the delay time of the bearer time message meets the preset delay requirement;

[0075] The sending module 904 is configured to forward the packet with the bearer time after the delay compensation module 903 performs delay compensation on...

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Abstract

The invention discloses a method, equipment and a system for transmitting a message bearing time, and belongs to the field of communication. The method comprises the following steps of: receiving the message bearing the time, wherein the message bearing the time is marked with timestamp information; computing the delay information of the message bearing the time in a transmission process according to local real-time time information and the timestamp information marked on the message bearing the time; and performing delay compensation on the message bearing the time according to the computed delay information, and after delay time meets a preset delay requirement, forwarding the message bearing the time. In the method, the equipment and the system, the delay compensation is performed on the received message bearing the time, and the message bearing the time is transmitted after the delay time meets the preset delay requirement, thereby keeping the delay time of the message bearing the time in the transmission process at a fixed value and enabling a digital subscriber line (DSL) system to meet the requirement that the messages bearing the time are transmitted with equal delays without jitter to further realize time synchronization.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for transmitting a time-bearing message. Background technique [0002] With the development of wireless communication technology, the emergence of 3G (3rd-generation, third-generation mobile communication technology) and 4G (4rd-generation, fourth-generation mobile communication technology) has put forward higher requirements for wireless communication systems, including High-precision time synchronization. [0003] The existing technology realizes time synchronization through the transmission of time-carrying messages, and provides a way to carry high-precision time synchronization information for Ethernet. The basic implementation method is to add a time tag to each piece of synchronous clock information through the cooperation of software and hardware. Make the receiver record the sending and receiving time of the synchronous clock information acc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70H04L7/00H04J3/06
CPCH04J3/0667
Inventor 肖瑞杰李东吴安妮
Owner HUAWEI TECH CO LTD
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