Local segment-shared protection based on source egress gateway selection for multi-domain optical mesh networks  

作　　者：ZHANG ShengFeng PENG YunFeng DU Shu YANG XiaoLong LONG KePing 

机构地区：[1]Research Center for Optical Internet and Mobile Information Networks, University of Electronic Science and Technology of China, Chengdu 611731, China [2]Institute of Advanced Network Technology and New Serives (ANTS), University of Science and Technology Beijing, Beijing 100083, China [3]Research Center for Optical Internet Networks, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

出　　处：《Science China(Information Sciences)》2011年第2期227-235,共9页中国科学（信息科学）（英文版）

基　　金：supported by the Chang Jiang Scholars Program of the Ministry of Education of China;the National Science Fund for Distinguished Young Scholars (Grant No. 60725104);the National Basic Research Program of China (Grant No. 2007CB310706);the National Natural Science Foundation of China (Grant Nos.60873263, 60932002, 60932005, 61071101);the National High-Tech Research & Development Program of China (Grant Nos.2008AA011001.2008AA011002,2009AA01Z254, 2009AA01Z215);the NCET Program of MoE of China;Sichuan Youth Science and Technology Foundation (Grant No. 09EQ026-032)

摘　　要：Survivability for multi-domain optical networks is becoming a key parameter due to expanding network. In order to provide the shared-path-protected lightpath in multi-domain optical mesh networks, we propose a protection solution, called GSLSSP. A new source egress gateway selecting mechanism is adopted in this solution. For each connection request, this mechanism can enable the source node to select a better egress gateway node to the destination domain and compute one inter-domain working path near the optimal path with the cooperating of this gateway node, under scalability and domain privacy constraint of multi-domain networks. And then one intra-domain link-disjoint local segment-backup path for each working-segment path is computed out in each single-domain passed by the working path. Simulation evaluation shows that the proposed scheme can provide 100% protection ability for multiple failures. Besides, it is effective in multi-domain path protection with more efficient resource utilization, lower blocking probabilities and less inter-domain cost than other schemes.Survivability for multi-domain optical networks is becoming a key parameter due to expanding network. In order to provide the shared-path-protected lightpath in multi-domain optical mesh networks, we propose a protection solution, called GSLSSP. A new source egress gateway selecting mechanism is adopted in this solution. For each connection request, this mechanism can enable the source node to select a better egress gateway node to the destination domain and compute one inter-domain working path near the optimal path with the cooperating of this gateway node, under scalability and domain privacy constraint of multi-domain networks. And then one intra-domain link-disjoint local segment-backup path for each working-segment path is computed out in each single-domain passed by the working path. Simulation evaluation shows that the proposed scheme can provide 100% protection ability for multiple failures. Besides, it is effective in multi-domain path protection with more efficient resource utilization, lower blocking probabilities and less inter-domain cost than other schemes.

关 键 词：SURVIVABILITY optical mesh networks multi-domains multiple failures segment-shared protection 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构] TN929.1[自动化与计算机技术—计算机科学与技术]