通信人家园

标题: 通道保护与复用段保护的区别？ [查看完整版帖子] [打印本页]

时间: 2011-9-17 09:26

作者: 傀儡 标题: 通道保护与复用段保护的区别？

通道保护与复用段保护的区别？

时间: 2011-9-18 16:02

作者: 优质民工

怎么说呢...
你把通道层、复用段层的位置分清楚了就知道他们的区别在哪里了...

时间: 2011-9-20 08:49

作者: 赛拔

<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">通道保护<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">，它的保护机理是“<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">双发选收”<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">，<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">收发不一致路由，在发端向东西两个方向发送，在收端进行选收，也就是说

P<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">环的业务是便历全环的，通常应用于集中型业务网络，于是它的最大系统容量及为STM-N<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">；

<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">所谓二线双向复用段环（MSP<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">），它是利用APS<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">协议，通过K1<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">、K2<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">字节，是基于复用段的一种保护，<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">它的保护机理是在断点两端用一个方向的9-16<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">个VC4<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">去保护另外一个方向的1-8<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">个VC4<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">，其他网元穿通，直到断点修复，但它的业务是双向的，收发一致路由，通常采用最短路径，因此可以看到，每两个网元间的系统容量为STM-N/2<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">，于是MSP<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">环的最大系统容量即为M*STM-N/2<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">，其中M<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">为该MSP<span lang=ZH style=\"font-size: 7.5pt; color: #4d4d4d; font-family: 宋体; mso-ascii-font-family: arial; mso-hansi-font-family: arial; mso-bidi-font-family: arial; mso-ansi-language: en-us; mso-fareast-language: zh; mso-bidi-language: ar-sa\">环中网元的个数。

时间: 2011-9-22 21:35

作者: 傀儡

通道保护环是相对通道来说的，是保护STM-N 信号中某个VC4(某个PDH信号)。是指当该VC4中的某个VC12发生故障是，只倒换该VC12。
业务流并发选收，从支路板将支路上环业务“并发”到主备线路上，收端支路板“选收”两侧线路的信号。当主用线路断掉，就开始通道倒换，收端支路板就选收备用线路。故配置通道保护时，要配主备用，即任意站点间的X时隙会占用整个环中的X时隙，故通道保护环的最大业务容量是STM-N。

复用段保护环是对复用段来说，两条光纤的前半个时隙做主用，后半个时隙做另一条光纤的备用，当两站点间的光缆断掉是，业务流：发端从断点处站点从主用倒换到备用，收端从断点处备用倒换到主用，完成业务传输。由于两个站点间的时隙可以在其他站点间重复使用，所以最大业务容量为STM-N*K/2（K为站点数）。

通道保护是倒换方式与业务容量不一致。

通信人家园 (https://www.txrjy.com/)