[原创]分组传送网（PTN）技术 T-MPLS 目前ITU-T批准的标准和下载连结

bluerax

<p class="MsoNormal"><span lang="EN-US">T</span><span lang="ZH-CN" style="font-family: 新細明體;">－</span><span lang="EN-US">MPLS</span><span lang="ZH-CN" style="font-family: 新細明體;">发展背景</span><span lang="EN-US"><op></op></span></p>



<p class="MsoNormal"><span lang="EN-US">   
</span><span style="font-family: 新細明體;">在电信业务的</span><span lang="EN-US">IP</span><span style="font-family: 新細明體;">化趋势推动下，传输网承载的业务从以</span><span lang="EN-US">TDM</span><span style="font-family: 新細明體;">为主向以</span><span lang="EN-US">IP</span><span style="font-family: 新細明體;">为主转变，面向</span><span lang="EN-US">TDM</span><span style="font-family: 新細明體;">业务设计的</span><span lang="EN-US">SDH</span><span style="font-family: 新細明體;">传输网技术已难以满足数据</span><span lang="EN-US">IP</span><span style="font-family: 新細明體;">业务的传送需</span>
                <span style="font-family: 新細明體;">求，主要的问题在于：基于固定的</span><span lang="EN-US">VC</span><span style="font-family: 新細明體;">容器作为传送单位，粒度大、种类少，适配分组业务的效率低，难以动态共享；基于电路连接传送业务，配置复杂，实现数据</span>
<span style="font-family: 新細明體;">业务所要求的全互联成本昂贵难以维护；业务种类简单，难以满足新型动态数据业务的要求。</span><br/><span lang="EN-US"></span><span style="font-family: 新細明體;"><br/>    基于</span><span lang="EN-US">SDH</span><span style="font-family: 新細明體;">的多业务传送平台技术（</span><span lang="EN-US">MSTP</span><span style="font-family: 新細明體;">）在一定程度上提供电信级分组业务的传送功能，体现了光传送网向支持分组传送的演进趋势。但</span><span lang="EN-US">MSTP</span><span style="font-family: 新細明體;">仍然是以</span>
                <span lang="EN-US">TDM</span><span style="font-family: 新細明體;">为内核，难以满足以分组业务为主的应用需求。未来的市场需要一种能够有效传递分组业务，并提供电信级</span><span lang="EN-US">OAM</span><span style="font-family: 新細明體;">和保护的分组传送技术。在这样的需求驱动</span>
                <span style="font-family: 新細明體;">下，业界开始提出分组传送网（</span><span lang="EN-US">TN</span><span style="font-family: 新細明體;">）的概念，打造一个适合分组业务为主的传送网。当前主要有</span><span lang="EN-US">T-MPLS</span><span style="font-family: 新細明體;">、</span><span lang="EN-US">BB-TE</span><span style="font-family: 新細明體;">和</span><span lang="EN-US">VT</span><span style="font-family: 新細明體;">三种</span><span lang="EN-US">TN</span><span style="font-family: 新細明體;">技术进入标准</span>
                <span style="font-family: 新細明體;">组织并开始在电信网络部署，而</span><span lang="EN-US">T-MPLS</span><span style="font-family: 新細明體;">技术已在标准化进程中抢占先机。</span></p>





<p class="MsoNormal"><span lang="EN-US">T-MPLS</span><span style="font-family: 新細明體;">技术介绍</span><br/><span lang="EN-US">    T-MPLS</span><span style="font-family: 新細明體;">是国际电信联盟（</span><span lang="EN-US">ITU-T</span><span style="font-family: 新細明體;">）定义的一种面向连接的分组传送技术，该技术对</span><span lang="EN-US">MPLS/PW</span><span style="font-family: 新細明體;">技术进行简化和改造，引入了传送的层网络、</span><span lang="EN-US">OAM</span><span style="font-family: 新細明體;">和线性保护等概念，符合传送网的需求。</span></p>



<p class="MsoNormal"><span lang="ZH-CN" style="font-family: SimSun;">以下为个人整理</span><span lang="EN-US" style="font-family: PMingLiu;">ITU-T</span><span lang="ZH-CN" style="font-family: SimSun;">目前批准的</span><span lang="EN-US" style="font-family: PMingLiu;">T-MPLS
</span><span lang="ZH-CN" style="font-family: SimSun;">标准</span><span lang="ZH-CN" style="font-family: SimSun;">和下载连结</span><span lang="EN-US" style="font-family: 細明體;"><op></op></span></p>



<p class="MsoNormal"><span lang="EN-US">G.8101
: Terms and Definitions for Transport MPLS</span><br/><span lang="EN-US" style="font-family: 細明體;"><a href="http://www.itu.int/rec/T-REC-G.8110-200501-I/en"><span lang="FR">http://www.itu.int/rec/ T-REC-G.8101-200612-I/en</span><span lang="FR" style="color: windowtext; text-decoration: none;">
                                </span></a></span><span lang="FR" style="font-family: 細明體;"><op></op></span></p>





<p class="MsoNormal"><span lang="EN-US">G.8110 :MPLS layer network architecture</span><br/><span lang="EN-US" style="font-family: 細明體;"><a href="http://www.itu.int/rec/T-REC-G.8110-200501-I/en"><span>http://www.itu.int/rec/T-REC-G.8110-200501-I/en</span></a><op></op></span></p>





<p class="MsoNormal"><span lang="EN-US" style="font-family: 細明體;"><op></op></span><span lang="EN-US">G.8110.1/Y.1370.1 (11/06) Architecture of Transport
MPLS (T-MPLS) Layer Network</span><br/><span lang="EN-US" style="font-family: 細明體;"><a href="http://www.itu.int/rec/T-REC-G.8110-200501-I/en"><span lang="FR">http://www.itu.int/rec/ T-REC-G.8110.1-200611-I/en</span><span lang="FR" style="color: windowtext; text-decoration: none;">
                                </span></a></span><span lang="FR" style="font-family: 細明體;"><op></op></span></p>



<p class="MsoNormal"><span lang="EN-US" style="font-family: 細明體;"><op></op></span><span lang="EN-US">G.8110.1/Y.1370.1
(2006) Amendment 1 (07/07) </span><br/><span lang="EN-US" style="font-family: 細明體;"><a href="http://www.itu.int/rec/T-REC-G.8110.1-200707-P%21Amd1/en"><span>http://www.itu.int/rec/T-REC-G.8110.1-200707-P!Amd1/en</span></a><op></op></span></p>





<p class="MsoNormal"><span lang="EN-US" style="font-family: 細明體;"><op></op></span><span lang="EN-US">G.8112
: Interfaces for the Transport MPLS (T-MPLS) hierarchy</span><br/><span lang="EN-US" style="font-family: 細明體;"><a href="http://www.itu.int/rec/T-REC-G.8112"><span>http://www.itu.int/rec/T-REC-G.8112</span></a></span></p>



<p class="MsoNormal"><span lang="EN-US">G.8121 : Characteristics of Transport MPLS (T-MPLS)
equipment functional blocks</span><span lang="EN-US"><br/><a href="http://www.itu.int/rec/T-REC-G.8121-200603-I/en*"><span>http://www.itu.int/rec/T-REC-G.8121-200603-I/en*</span></a><op></op></span></p>





<p class="MsoNormal"><span lang="FR">Recommendation G.8121/Y.1361
(2006) Corrigendum 1 (12/06)</span><span lang="FR"><op></op></span><br/><span lang="EN-US" style="font-family: 細明體;"><a href="http://www.itu.int/rec/T-REC-G.8121-200612-I%21Cor1/en"><span lang="FR">http://www.itu.int/rec/T-REC-G.8121-200612-I!Cor1/en</span></a></span><span lang="FR" style="font-family: 細明體;"><op></op></span></p>





<p class="MsoNormal"><span lang="FR">Recommendation G.8121/Y.1381
(2006) Amendment 1 (10/07)</span><span lang="FR"><op></op></span><br/><span lang="EN-US" style="font-family: 細明體; color: blue;"><a href="http://www.itu.int/rec/T-REC-G.8121-200710-P%21Amd1/en"><span lang="FR">http://www.itu.int/rec/T-REC-G.8121-200710-P!Amd1/en</span></a></span><span lang="FR" style="font-family: 細明體; color: blue;"><op></op></span></p>





<p class="MsoNormal"><span lang="FR" style="font-family: 細明體;"><op></op></span><span lang="EN-US">G.8131 : Linear protection switching for Transport
MPLS (T-MPLS) networks</span><br/><span lang="EN-US" style="font-family: 細明體;"><a href="http://www.itu.int/rec/T-REC-G.8131-200702-I/en"><span>http://www.itu.int/rec/T-REC-G.8131-200702-I/en</span></a><op></op></span></p>





<p class="MsoNormal"><span lang="FR">Recommendation G.8131/Y.1382 (2007) Amendment 1 (09/07) </span><span lang="FR" style="font-family: 新細明體;">(</span><span lang="ZH-CN" style="font-family: SimSun;">需要</span><span lang="FR">TIES</span><span lang="ZH-CN" style="font-family: SimSun;">账号</span><span lang="FR" style="font-family: 新細明體;">)</span><span lang="FR"><op></op></span><br/><span lang="EN-US" style="font-family: 細明體;"><a href="http://www.itu.int/rec/T-REC-G.8131-200709-P%21Amd1/en"><span lang="FR">http://www.itu.int/rec/T-REC-G.8131-200709-P!Amd1/en</span></a></span><span lang="FR" style="font-family: 細明體;"><op></op></span></p>





<p class="MsoNormal"><span lang="FR" style="font-family: 細明體;"><op></op></span><span lang="EN-US">G.8151
: Management aspects of the T-MPLS network element</span><span lang="EN-US" style="font-family: 新細明體;"> (</span><span lang="ZH-CN" style="font-family: SimSun;">需要</span><span lang="EN-US">TIES</span><span lang="ZH-CN" style="font-family: SimSun;">账号</span><span lang="EN-US" style="font-family: 新細明體;">)</span><span lang="EN-US" style="font-family: 細明體;"><op></op><br/><a href="http://www.itu.int/rec/T-REC-G.8151-200710-P/en"><span>http://www.itu.int/rec/T-REC-G.8151-200710-P/en</span></a><op></op></span></p>