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1588-based time synchronization method and apparatus

A time synchronization and time stamp technology, applied in the field of communication, can solve the problem of low synchronization accuracy

Active Publication Date: 2017-12-29
ZTE CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The technical problem solved by the technical solution provided according to the embodiment of the present invention is to overcome the problems and defects of low synchronization accuracy existing in the existing synchronization technology

Method used

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  • 1588-based time synchronization method and apparatus
  • 1588-based time synchronization method and apparatus
  • 1588-based time synchronization method and apparatus

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Embodiment Construction

[0040] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0041] figure 1 is a block diagram of the 1588-based time synchronization method provided by the first embodiment of the present invention, such as figure 1 As shown, the steps include:

[0042] Step S101: Obtain the phase difference between the system clock and the line clock according to the system clock and the line clock.

[0043] Specifically, the phase difference between the system clock and the line clock is obtained by performing phase difference detection on the system clock and the line clock.

[0044] Step S102: Under the line clock, determine the time difference between the rising edge corresponding to the packet header flag of the 1588 mess...

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Abstract

The invention discloses a 1588-based time synchronization method and system, and relates to the field of communication. The method comprises the following steps: performing detection processing on a phase difference between a system clock and a circuit clock to obtain the phase difference between the system clock and the circuit clock; under the circuit clock, determining a time difference between a rising edge corresponding to a message header mark of a 1588 message and the rising edge of a current period of the circuit clock; under the system clock, generating a timestamp related to the 1588 message; and compensating the generated timestamp by using the phase difference and the time difference, so that the timestamp is consistent with the circuit clock. The timestamp related to the 1588 message is compensated, so that the compensated timestamp is consistent with the circuit clock, and the purpose of high-precision time synchronization is achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a 1588-based time synchronization method and device. Background technique [0002] With the continuous development of communication technology, higher requirements are put forward for the performance of time synchronization. For example, the recent requirement of using base stations to provide positioning services requires that the time accuracy be around ±200 ns. The upgraded version of Long Term Evolution (LTE) -Advanced, LTE-Advanced)'s key technology Coordinated Multipoint Joint Processing (CoMP-JP) requires the relative time accuracy between adjacent base stations to be around ±500ns; the future fifth-generation mobile communication technology (The 5th Generation MobileCommunication Technology, 5G) system may require ultra-high-precision time synchronization on the order of hundreds of ns; as another example, more distant quantum communication technology requires extremely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0661H04J3/067H04J3/06
Inventor 李霞刘峰何力
Owner ZTE CORP
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