Dynamic shared segment protection algorithm with differentiated reliability in GMPLS networks  

作　　者：Wang Yan Zheng Junhu Zeng Jiazhi 

机构地区：[1]Coll. of Computer Science and Engineering, Univ. of Electronic Science and Technology of China, Chengdu 610054, P. R. China [2]Coll. of Computer Science and Technology, Southwest Univ. for Nationalities, Chengdu 610041, P. R. China.

出　　处：《Journal of Systems Engineering and Electronics》2009年第1期178-184,共7页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (60673142);Applied Basic Research Project of Sichuan Province (2006J13-067)

摘　　要：To improve the resource utilization ratio and shorten the recovery time of the shared path protection with differentiated reliability （SPP-DiR） algorithm, an algorithm called dynamic shared segment protection with differentiated reliability （DSSP-DiR） is proposed for survivable GMPLS networks. In the proposed algorithm, a primary path is dynamically divided into several segments according to the differentiated reliability requirements of the customers. In the SPP-DiR algorithm, the whole primary path should be protected, while in the DSSP- DiR algorithm, only partial segments on the primary path need to be protected, which can reduce more backup bandwidths than that in the SPP-DiR algorithm. Simulation results show that the DSSP-DiR algorithm achieves higher resource utilization ratio, lower protection failure probability, and shorter recovery time than the SPP-DiR algorithm.To improve the resource utilization ratio and shorten the recovery time of the shared path protection with differentiated reliability （SPP-DiR） algorithm, an algorithm called dynamic shared segment protection with differentiated reliability （DSSP-DiR） is proposed for survivable GMPLS networks. In the proposed algorithm, a primary path is dynamically divided into several segments according to the differentiated reliability requirements of the customers. In the SPP-DiR algorithm, the whole primary path should be protected, while in the DSSP- DiR algorithm, only partial segments on the primary path need to be protected, which can reduce more backup bandwidths than that in the SPP-DiR algorithm. Simulation results show that the DSSP-DiR algorithm achieves higher resource utilization ratio, lower protection failure probability, and shorter recovery time than the SPP-DiR algorithm.

关 键 词：generalized multiprotocal label switching segment protection differentiated reliability resource uti-lization ratio. 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术] U661.7[自动化与计算机技术—计算机科学与技术]