Configuring the Time Synchronization Function
This section describes how to configure the time synchronization function.
Usage Scenario
On the IP RAN shown in Figure 1, time synchronization needs to be performed between NodeBs. The Atom GPS timing solution can be deployed as follows to allow time synchronization: Insert an Atom GPS module into an ASG so that the Atom GPS module can synchronize clock signals with the GPS and the ASG can synchronize clock signals with the Atom GPS module. Then, configure the time synchronization function to allow transmission of clock signals to other devices on the bearer network. In this manner, network-wide clock synchronization is achieved.
- Configuring the Time Synchronization Function on an Atom GPS Module
- This section describes how to configure the time synchronization function on an Atom GPS module so that GPS time signals can be transmitted to the router where the Atom GPS module houses through 1588v2 packets and then to downstream devices.
- Configuring the 1588v2 Synchronization Function on the Device Where an Atom GPS Module Houses
- Configuring 1588v2 globally involves operations such as enabling 1588v2 in the system view and setting the device type to BC. After enabling 1588v2 in the system view, enable it in the interface view. In addition, specify the link delay measurement mechanism, asymmetric correction value, and timestamping mode for the interfaces.
- Configuring the G.8275.1 Synchronization Function on the router Where an Atom GPS Module Houses
- You need to enable G.8275.1 in the system view of a device, configure the device as a T-BC, specify the domain to which the device belongs to, and enable the static configuration of the status of the T-BC interface. After enabling G.8275.1 in the system view, you need to enable G.8275.1 in the interface view.