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A time synchronization method and system

A technology of time synchronization and time deviation, applied in the field of communication

Active Publication Date: 2020-12-04
CHINA ACADEMY OF INFORMATION & COMM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing clock synchronization technology scheme based on the IEEE1588 protocol cannot perform precise time synchronization

Method used

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  • A time synchronization method and system
  • A time synchronization method and system
  • A time synchronization method and system

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and examples.

[0019] In the embodiment of the present application, a time synchronization system is provided. The path delay measurement request message (Delay_Req) ​​sent by the device is returned along the original path of the synchronization (Sync) message, and the time delay of the round-trip path is guaranteed to be consistent. Obtain the master-slave time deviation under certain conditions, and perform slave clock time synchronization. The time synchronization solution can improve the synchronization accuracy of the IEEE 1588 protocol, that is, the accuracy of clock synchronization of the slave device is improved.

[0020] see figure 1 , figure 1 It is a schematic diagram of the time synchronization system in the embodiment of this applicati...

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Abstract

The invention provides a time synchronization method and system. The method comprises the following steps that: slave equipment sends a path delay measurement request message Dely_Req message to master equipment through a path which is the same as the path of sending a synchronous Sync message by the master equipment; and the slave equipment obtains master-slave time deviation according to the receiving and sending time of the Sync message and the Delay_Req message of the same path, and performs time synchronization on a slave clock by using the master-slave time deviation. According to the method, the synchronization precision of an IEEE 1588 protocol can be improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a time synchronization method and system. Background technique [0002] With the rapid development of information science and technology, high-precision time and frequency synchronization plays an increasingly important role in the development of technologies in various fields. The accelerated development of many technical directions has put forward higher requirements for high-precision synchronization technology. For example, in the current 5G mobile communication technology, base station coordination services based on enhanced technologies such as CoMP, MIMO, and CA have proposed synchronization requirements of 65ns / 130ns / 260ns / 3us in terms of time synchronization; OTDOA (Observed Time Difference of Arrival) technology, such as positioning accuracy at the meter level, proposes a relative synchronization requirement better than 3ns. With the development of comm...

Claims

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Application Information

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IPC IPC(8): H04J3/06
CPCH04J3/0638H04J3/0682
Inventor 缪新育胡昌军吕博潘峰李曙方赵文玉乔耀军
Owner CHINA ACADEMY OF INFORMATION & COMM
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