Novel disjoint path selection scheme based on link availability in ASON  

作　　者：WANG Xian-qing LU Yue-ming JI Yue-feng 

机构地区：[1]Key Laboratory of Optical Communication and Lightwave Technologies,Ministry of Education, Beijing University of Posts and Telecommunications,Beijing 100876, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2007年第3期70-73,共4页中国邮电高校学报（英文版）

基　　金：This work is supported by the National Science Fund for Distinguished Young Scholars（60325104）；the National Natural Science Foundation of China （60572021）；the Hi-Tech Research and Development Program of China （2006AA01Z243）；the PCSIRT Project of M0E （IRT0609）；the International Cooperation Project of M0ST （2006DFA 11040）.

摘　　要：Risk-disjoint routing is an efficient way to improve network survivability. In this article, a partial risk-disjoint routing algorithm based on link availability （PRDRA-LA） is proposed based on the complete risk-disjoint routing algorithm （CRDRA）. While calculating the protection path with PRDRA-LA, the links that share risks with the links in the working path are filtered by link availability. In addition, the risk disjoint degree between the protection path and the working path can be adjusted freely. Simulation results showed that when compared with CRDRA, routing connections with PRDRA-LA can achieve improved survivability while the number of connections that can be successfully routed over the current network is kept from serious decline.Risk-disjoint routing is an efficient way to improve network survivability. In this article, a partial risk-disjoint routing algorithm based on link availability （PRDRA-LA） is proposed based on the complete risk-disjoint routing algorithm （CRDRA）. While calculating the protection path with PRDRA-LA, the links that share risks with the links in the working path are filtered by link availability. In addition, the risk disjoint degree between the protection path and the working path can be adjusted freely. Simulation results showed that when compared with CRDRA, routing connections with PRDRA-LA can achieve improved survivability while the number of connections that can be successfully routed over the current network is kept from serious decline.

关 键 词：automatically switched optical network risk- sharing links partial risk-disjoint routing algorithm based on link availability risk-disjoint degree 

分 类 号：TN915.02[电子电信—通信与信息系统]