SDH网状网自愈  

Self-healing of SDH Mesh Network

作　　者：苏驷希[1] 冀胜华 张惠民[1] 

机构地区：[1]北京邮电大学,101信箱北京100876

出　　处：《电子学报》2000年第4期36-39,共4页Acta Electronica Sinica

基　　金：国家自然科学基金!(No.69472 0 34)资助课题 ;电子科技大学宽带光纤传输与通信系统技术国家重点实验室开放课题资助

摘　　要：本文讨论了SDH网状网的自愈 .由于交叉连接系统交叉连接时间的缓慢 ,SDH网状网不能在整体上达到 2秒的恢复时限 .优先级恢复保证对高优先级通道达到 2秒的恢复时限 .设想的恢复体系包括两个阶段 :对高优先级通道的分布式虚倒换和对低优先级通道的分布式自愈 ;高优先级通道能在 2秒或更短的时间内恢复 ,低优先级通道的恢复需要数秒 .为了实现上述恢复体系 ,提出了一种多路由带宽分配方法和一种消息传播机制 ,这两种方法在网络正常时使用 .Self Healing of SDH mesh network is discussed.Because of slow cross connection time of current DCS,restoration of mesh network cannot accomplish 2 seconds objective completely.Priority restoration is used in order to meet 2s bound for high priority path.Proposed restoration mechanism is composed of two phases:distributed virtual protection switching for high priority path and distributed path self healing for low priority path.High priority path can be restored within 2s or less and low priority path can be restored by several seconds.In order to realize such restoration mechanism,a multi route bandwidth allocation method and a message broadcasting method are proposed.These two methods are used in normal conditions.

关 键 词：数字同步系列 网状网 交叉连接 通信网 

分 类 号：TN913.2[电子电信—通信与信息系统]