光网络中引入了共享风险链路组(SRLG)的概念,要求工作通道与保护通道不能处于同一个SRLG之中。文章提出了一种基于SRLG限制的动态共享通道保护算法——动态链路权重配置(Dynamic Link Weight Configuration,DLWC)算法,该算法的关键在于...光网络中引入了共享风险链路组(SRLG)的概念,要求工作通道与保护通道不能处于同一个SRLG之中。文章提出了一种基于SRLG限制的动态共享通道保护算法——动态链路权重配置(Dynamic Link Weight Configuration,DLWC)算法,该算法的关键在于为链路定义了两个动态权重。在计算工作通道和保护通道时,它能综合解决SRLG限制、动态负载均衡和自陷等3个关键问题。展开更多
This paper presents a halfway signaling exchange shared path protection(HSE-SPP)on the backup route for a fast connection recovery strategy.In the proposed HSE-SPP,a pre-assigned intermediate node on the backup route ...This paper presents a halfway signaling exchange shared path protection(HSE-SPP)on the backup route for a fast connection recovery strategy.In the proposed HSE-SPP,a pre-assigned intermediate node on the backup route is chosen for signaling exchange.When connection fails,source and destination nodes simultaneously generate backup connection setup messages to the pre-assigned intermediate node on the reserved backup route.At the intermediate node,signaling process occurs,and acknowledgment is generated for data transmission to the respective end nodes.Consequently,connection recovery time by applying HSE-SPP becomes very low.Simulations are performed for network parameters and results are verified with existing strategies.The average recovery time(RT),bandwidth blocking probability(BBP),bandwidth provisioning ratio(BPR),and resource overbuild(RO)ratio of HSE-SPP for ARPANET is 13.54 ms,0.18,3.02,0.55,and for dedicated path protection(DPP)are 13.20 ms,0.56,6.30,3.75 and for shared path protection(SPP)22.19 ms,0.22,3.23,0.70 respectively.Similarly,average RT,BBP,BPR and RO of HSE-SPP for COST239 are8.33 ms,0.04,1.64,0.26,and for DPP 4.23,0.47,3.50,2.04,and for SPP 11.81,0.08,1.66,0.27 respectively.Hence,results of the proposed strategy are better in terms of RT,BBP,BPR,and RO ratio.展开更多
WDM光网络中引入了共享风险链路组(SRLG)的概念,要求工作通路与保护通路不能处于同一个SRLG之中.提出了一种基于SRLG限制的动态共享通道保护算法,即满足K对业务的动态链路权重配置(K-Dynamic Link Weight Con-figuration,K-DLWC)算法,...WDM光网络中引入了共享风险链路组(SRLG)的概念,要求工作通路与保护通路不能处于同一个SRLG之中.提出了一种基于SRLG限制的动态共享通道保护算法,即满足K对业务的动态链路权重配置(K-Dynamic Link Weight Con-figuration,K-DLWC)算法,该算法的关键在于为链路定义了2个动态权重.在计算工作通路和保护通路时,它能综合解决SRLG限制、局部最优等关键问题.展开更多
文摘光网络中引入了共享风险链路组(SRLG)的概念,要求工作通道与保护通道不能处于同一个SRLG之中。文章提出了一种基于SRLG限制的动态共享通道保护算法——动态链路权重配置(Dynamic Link Weight Configuration,DLWC)算法,该算法的关键在于为链路定义了两个动态权重。在计算工作通道和保护通道时,它能综合解决SRLG限制、动态负载均衡和自陷等3个关键问题。
文摘This paper presents a halfway signaling exchange shared path protection(HSE-SPP)on the backup route for a fast connection recovery strategy.In the proposed HSE-SPP,a pre-assigned intermediate node on the backup route is chosen for signaling exchange.When connection fails,source and destination nodes simultaneously generate backup connection setup messages to the pre-assigned intermediate node on the reserved backup route.At the intermediate node,signaling process occurs,and acknowledgment is generated for data transmission to the respective end nodes.Consequently,connection recovery time by applying HSE-SPP becomes very low.Simulations are performed for network parameters and results are verified with existing strategies.The average recovery time(RT),bandwidth blocking probability(BBP),bandwidth provisioning ratio(BPR),and resource overbuild(RO)ratio of HSE-SPP for ARPANET is 13.54 ms,0.18,3.02,0.55,and for dedicated path protection(DPP)are 13.20 ms,0.56,6.30,3.75 and for shared path protection(SPP)22.19 ms,0.22,3.23,0.70 respectively.Similarly,average RT,BBP,BPR and RO of HSE-SPP for COST239 are8.33 ms,0.04,1.64,0.26,and for DPP 4.23,0.47,3.50,2.04,and for SPP 11.81,0.08,1.66,0.27 respectively.Hence,results of the proposed strategy are better in terms of RT,BBP,BPR,and RO ratio.
文摘WDM光网络中引入了共享风险链路组(SRLG)的概念,要求工作通路与保护通路不能处于同一个SRLG之中.提出了一种基于SRLG限制的动态共享通道保护算法,即满足K对业务的动态链路权重配置(K-Dynamic Link Weight Con-figuration,K-DLWC)算法,该算法的关键在于为链路定义了2个动态权重.在计算工作通路和保护通路时,它能综合解决SRLG限制、局部最优等关键问题.
