EPON接入网的生存性  

Survivability of EPON access networks

作　　者：陈虹[1] 苏厉[1] 史国伟[1] 金德鹏[1] 曾烈光[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2004年第7期933-937,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2001AA121071)

摘　　要：网络生存性是高速通信网络的重要性能评估指标。该文定量分析了EPON(ethernetpassiveopticalnetwork)接入网的网络生存性,得到网络生存性与破坏强度之间的定量关系,为EPON接入网生存性的预测和评估提供了理论依据。并分析和比较了EPON接入网的在3种备份方式下的生存性,从理论上证明EPON接入网在覆盖范围相同的情况下使用节点光纤备份比使用树干光纤备份具有更好的生存性。在节点个数和分布相同的情况下,使用总线光纤备份则不仅节省光纤而且网络生存性最好。该研究结果可为EPON接入网的设计提供参考。Network survivability is an important factor in high-speed telecom networks. A method to quantitatively analyze the survivability of EPON access networks was used to analyze the relationship between network survivability and the intensity of the network damage. The result can be used to forecast and evaluate the survivability of EPON access networks. Comparison of the survivability of three kinds of EPON access network backups showed that the survivability of EPON networks with Node-Fiber Backup is better than with Trunk-Fiber Backup for the same coverage area. When the number and distribution of ONU are the same, the survivability of EPON networks with Bus-Fiber Backup is better than with Node-Fiber Backup. These conclusions can be used to design the topology for EPON access networks.

关 键 词：接入网 EPON(ethernet PASSIVE optical networks) 生存性 

分 类 号：TN915.6[电子电信—通信与信息系统]