Research on eSSM-based algorithm for avoiding clock loop in synchronization Ethernet

Tang Yonglin1; Ma Hong2

doi:10.13756/j.gtxyj.2013.03.012

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Research on eSSM-based algorithm for avoiding clock loop in synchronization Ethernet

- Research on eSSM-based algorithm for avoiding clock loop in synchronization Ethernet
- Study on Optical communication Issue 3, Pages: 26-28(2013)
- 作者机构：
  
  1. UTStarcom通讯有限公司基础系统工程部
  2. 杭州电子科技大学软件工程学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2013.03.012
  CLC： TN914.332
- Published：2013，
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[1]唐永林,马虹.基于eSSM的同步以太网时钟成环的避免算法研究[J].光通信研究,2013(03):26-28.

Tang Yonglin1, Ma Hong2. Research on eSSM-based algorithm for avoiding clock loop in synchronization Ethernet. [J]. (3):26-28(2013)
[1]唐永林,马虹.基于eSSM的同步以太网时钟成环的避免算法研究[J].光通信研究,2013(03):26-28. DOI： 10.13756/j.gtxyj.2013.03.012.

Tang Yonglin1, Ma Hong2. Research on eSSM-based algorithm for avoiding clock loop in synchronization Ethernet. [J]. (3):26-28(2013) DOI： 10.13756/j.gtxyj.2013.03.012.

摘要

为了防止在多种时钟故障情况下的同步以太网时钟成环

扩展了ESMC（以太网同步消息通道）报文。在利用ESMC报文的预留字节来传送CSID（时钟源标识符）和记录CSTTL（时钟源生存周期）基础上

提出了eSSM（扩展同步状态消息）算法。采用该算法可以有效防止在多种时钟故障情况下的时钟成环

并且能优化时钟树

提高时钟性能。

Abstract

In order to avoid clock loop in case of multiple types of clock failures in Sync Ethernet

Ethernet Synchronization Messaging Channel（ESMC） messages are extended.On the basis of using the reserved bytes in ESMC messages to transmit the Clock Source ID（CSID） and recording Clock Source Time To Live（CSTTL）

the extended Synchronization Status Message（eSSM） algorithm is presented.This algorithm can not only effectively avoid clock loop in case of multiple types of clock failures

but also optimize clock tree and improve clock performance.

关键词

同步以太网同步状态消息以太网同步消息通道时钟成环

Keywords

Sync EthernetSSMESMCclock loop

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Wuhan Research Institute of Posts and Telecommunication

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