1.
Add a system clock source (frequency synchronization).
The 1588v2 clock is issued to the ONU through the optical path of the PON port,
implementing the clock synchronization between the OLT and the ONU.
a.
Run the
clock source
command to add the 1588v2 clock source as the system
clock source.
huawei(config)#
clock source 0 0/0/1
b.
Run the
clock priority
command to configure the priority of the 1588v2 clock
source.
huawei(config)#
clock priority system 0
2.
Configure the 1588v2 time source (time synchronization).
a.
Run the
ptp enable
command to enable the 1588v2 function.
huawei(config)#
ptp enable
b.
Run the
ptp source
command to add the 1588v2 clock source as the system clock
source.
huawei(config)#
ptp source 0 0/0/1
c.
Run the
ptp priority
command to configure the priority of the 1588v2 clock
source.
huawei(config)#
ptp priority 0
3.
Configure the time output mode of the clock output interface.
The ONU provides an independent output clock through time output port 0 on the
panel. Configure the clock output signal to 2 MHz and time signal to 1pps+ubx.
NOTE
Configure the clock/time output mode according to actual conditions.
huawei(config)#
clock bits-type 0 clock 2mhz
BITS clock parameter set successfully
huawei(config)#
clock bits-type 0 time 1pps protocol ubx
BITS clock parameter set successfully
----End
14.3.6 Configuring 1588v2 Clock Synchronization
In the base stations that require time synchronization, such as CDMA2000/TD-SCDMA/LTE,
the OLT brings 1588v2 clocks in end-to-end (E2E) 1588v2 mode. The OLT transmits the clocks
to the ONU through GPON lines and then downstream to the base station, implementing clock
synchronization of the entire network.
Context
1588v2 is a time synchronization technology. The quality of clock transmitted by 1588v2 meets
the stratum 3 clock requirement and the time quality reaches a submicrosecond precision, which
solves the time and clock synchronization problems of the user. In addition, using 1588v2 can
better reduce user's investment. Therefore, 1588v2 is applicable to the base station access
services.
Application Context
, the OLT obtains the 1588v2 time by using the upstream network
interface (the time is transmitted by the upstream network hop by hop). Then, the OLT transmits
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide
14 FTTM Configuration (Base Station Access)
Issue 01 (2014-04-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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