Configuring Base Station Access Clock Synchronization; Overview Of Base Station Access Clock/Time Synchronization - Huawei SmartAX MA5603T Configuration Manual

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide
Protection Scheme
GPON Type C dual
homing
NOTE
The Type B protection scheme, Type C single homing scheme, and Type C dual homing protection scheme are
mutually exclusive. Therefore, only one of these protection schemes can be configured for an ONU.

14.3 Configuring Base station access Clock Synchronization

This topic describes the concept and principle of clock synchronization in bse station access
network, clock synchronization solutions supported by devices, and configuration differences.

14.3.1 Overview of Base station access Clock/Time Synchronization

This topic describes the clock/time synchronization concept, clock/time synchronization
solutions supported by the system, and solution comparison. Proper clock synchronization
solutions are selected for Base station access networks based on base station type and equipment
layout.
Synchronization Concept
Synchronization includes frequency synchronization and time synchronization.
Frequency synchronization is also called clock synchronization, which indicates that certain
strict relations are kept between signals in terms of frequency and phase. The valid transience
occurs at the same rate for a signal. In this way, the equipment in the entire network runs at the
same rate.
Time synchronization is also called frequency and phase synchronization, which has two
meanings: instant and interval. Instant refers to an instant of continuous time, and interval refers
to an interval between two instants.
The purpose of clock/time synchronization is to control the occurrence of controlled slip and to
decrease the slip, burst bit error, sudden phase change, jitter, or drift of various device signals
in the telecommunications service network to the minimum, ensuring the high-quality and high-
efficiency running of the telecommunications service network.
Issue 01 (2014-04-30)
Description
Two PON ports on different OLTs,
two PON ports on an ONU, two
backbone optical fibers, two optical
splitters, and two tributary optical
fibers are configured to implement
this protection. The difference
between this protection scheme and
the GPON Type C single homing
protection scheme is that the ONU
needs to be dual homed to two OLTs
in this protection scheme. This full-
backup protection scheme provides
the highest-level protection for links
and has the highest costs.
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14 FTTM Configuration (Base Station Access)
Suggestion
It provides full backup
protection, which is the
highest level of protection,
at the same time, it has the
highest cost.
This protection scheme can
be configured for only the
Ethernet QinQ private line
service. It does not support
TDM services, including
Native TDM and SAToP.
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