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Method and device for sharing clock reference source

A clock reference and time technology, applied in measuring devices, satellite radio beacon positioning systems, instruments, etc., can solve the problem that the destination cannot obtain a more accurate clock reference source, cannot know TOD status information, and cannot share clock reference sources and other issues to achieve the effect of an accurate clock reference source

Inactive Publication Date: 2011-09-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, although the destination end shares the GNSS reference source of the source end to achieve time synchronization, but because the TOD message is terminated at the source end, some information is processed at the source end, and the destination end cannot know the TOD status information, such as the second pulse status, positioning status, etc. , which is different from the deployment of the reference source at the local end, and it is impossible to share the complete clock reference source
[0006] It can be seen that in the clock reference source sharing in the prior art, the destination end cannot obtain a more accurate clock reference source

Method used

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  • Method and device for sharing clock reference source
  • Method and device for sharing clock reference source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] See figure 1 This embodiment provides a method for sharing a clock reference source, including:

[0024] 101: Encapsulate TOD information into a TOD message according to a predefined time of day TOD message format, the TOD information includes TOD time information and TOD status information;

[0025] 102: Send the TOD message to the destination.

[0026] In this embodiment, the TOD information is encapsulated into a TOD message according to the pre-defined TOD message format, and the TOD message is sent to the destination. This software transfer method of completely transferring the TOD information from the source to the destination achieves This has the same effect as when the clock reference source is deployed on the local end, and real clock reference source sharing is achieved.

Embodiment 2

[0028] This embodiment is improved on the basis of embodiment 1, see figure 2 , The method for clock reference source sharing provided in this embodiment includes:

[0029] 201: The source defines the time of day TOD message format in accordance with the NMEA (National Marine Electronics Association, International Marine Electronics Association) format;

[0030] Wherein, the source end may specifically be a base station, which is not limited in this embodiment.

[0031] Specifically, according to a predefined TOD message format, the required TOD information is encapsulated into a TOD message; or, according to at least one predefined TOD message format, different TOD message formats include different TOD information, encapsulating the required TOD information into a TOD message corresponding to the at least one TOD message format.

[0032] Specifically, according to the NMEA format, the TOD message format of the defined time of day may sequentially include: a sentence identifier, a se...

Embodiment 3

[0100] See image 3 This embodiment provides a device for sharing a clock reference source. The device may specifically be a base station, but is not limited to a base station. The device may include:

[0101] The encapsulation module 301 is configured to encapsulate the TOD information into a TOD message according to a predefined time of day TOD message format, the TOD information including TOD time information and TOD status information;

[0102] The sending module 302 is used to send the TOD message to the destination, so that the destination receives and parses the TOD message to obtain TOD information, and performs time synchronization according to the TOD information.

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PUM

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Abstract

The invention discloses a method and device for sharing a clock reference source, belonging to the clock synchronic field. The method comprises the following steps: packaging TOD (time of day) information into TOD message according to predefined TOD message format, wherein the TOD information comprises TOD time information and TOD status information; and transmitting the TOD message into a destination end. The device comprises a packaging module and a transmitting module. In the invention, according to the predefined TOD message format, the TOD information is packaged into the TOD message, and the TOD message is transmitted to the destination end. The software delivery mode that the TOD information is completely transmitted to the destination end from the source end realizes the same effect of deploying the clock reference source at the end, and really realizes the share of the clock reference source.

Description

Technical field [0001] The present invention relates to the field of clock synchronization, in particular to a method and device for sharing a clock reference source. Background technique [0002] GPS (Global Positioning System, Global Positioning System) and 1pps (1 pulse per second) + TOD (Time of Day) type clock reference sources are collectively referred to as GNSS reference sources. GNSS reference source is divided into two parts, 1pps signal and serial port information, serial port information is also called TOD information, including TOD time information and TOD status information. [0003] The GNSS reference source can be used for time synchronization. In a scenario where only a single reference source is deployed, the entire system can achieve time synchronization by sharing the reference source. [0004] For the scenario where the GNSS reference source is shared within the frame, the source end transmits a 1pps signal to the destination end through the backplane clock bus,...

Claims

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Application Information

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IPC IPC(8): G01S19/13G01S19/14
Inventor 叶航
Owner HUAWEI TECH CO LTD
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