基于ieee1588实现精确时间同步的方法和装置

Method for realizing precision time synchronization based on IEEE1588 and apparatus thereof

Abstract

The invention provides a method for realizing precision time synchronization based on IEEE1588. The method comprises the following steps that: according to a downlink/uplink path delay test message sent from a slave device to a primary device, uplink/downlink data between the primary device and the slave device is switched to the downlink/uplink; after the data is transmitted on the downlink/uplink, a first wavelength is used to transmit the downlink data and a second wavelength is used to transmit the uplink data on the downlink/uplink; through an IEEE1588 protocol, the downlink/uplink path delay can be calculated; through the IEEE1588 protocol, and the uplink, downlink path delay, a time error between the primary device and the slave device can be calculated so that the slave device can realize the precision time synchronization with the primary device according to the calculated time error. The invention simultaneously discloses an apparatus of realizing the precision time synchronization based on the IEEE1588. By using the method for realizing the precision time synchronization based on the IEEE1588 and the apparatus thereof, influences of the asymmetric uplink/downlink on the time synchronization can be avoided and accuracy of the time synchronization can be raised.
本发明提供了一种基于IEEE1588实现精确时间同步的方法,该方法包括:根据从设备向主设备发送的下/上行线路时延测试消息将主设备与从设备之间的上/下行线路数据切换到下/上行线路上传输后,在下/上行线路上分别以第一波长传输下行线路数据、以第二波长传输上行线路数据,通过IEEE1588协议计算出下/上行线路时延;通过IEEE1588协议和所述上、下行线路时延计算得到主设备与从设备之间的时间误差,使得从设备根据计算得到的时间误差实现与主设备之间的精确时间同步。本发明同时公开了一种基于IEEE1588实现精确时间同步的装置,应用本发明所述的基于IEEE1588实现精确时间同步的方法和装置,能够避免上下行线路不对称对时间同步带来的影响,提高时间同步的精确性。

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