CLOCK SYNCHRONIZATION METHOD AND APPARATUS AND PASSIVE OPTICAL NETWORK SYSTEM

WIPO Patent Application WO/2018/161282

A1

The present disclosure provides a clock synchronization method and apparatus and a passive optical network system, pertaining to the technical field of optical networks. The method is applicable to a first optical network unit (ONU) in a passive optical network (PON), the first ONU being an ONU configured with a clock source. The method comprises: synchronizing a first clock with a clock of a clock source, the first clock referring to a clock of the first ONU; and instructing an optical line terminal (OLT) to synchronize a second clock with the clock of the clock source, the second clock referring to a clock of the OLT. In the present disclosure, the first clock of the first ONU is synchronized with the clock of the clock source, and further the OLT is instructed to synchronize its own second clock with the clock of the clock source, realizing synchronization of the clocks of both the OLT and the ONU with the clock of the clock source in a scenario in which no clock source exists on the OLT side but a clock source exists on the ONU side, thus ensuring the accuracy and stability of a clock in an optical network, and further ensuring the reliability of a transmission process.

ZHAO DIANBO (CN)
YIN JINRONG (CN)
WANG SU (CN)
SUI MENG (CN)

PCT/CN2017/075992

September 13, 2018

March 08, 2017

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HUAWEI TECH CO LTD (CN)

H04J3/06; H04L7/00

CN102136900A	2011-07-27
CN101330374A	2008-12-24
CN101860430A	2010-10-13
CN104284258A	2015-01-14
US20030039272A1	2003-02-27

BEIJING SAN GAO YONG XIN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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