Subpath protection for scalability and fast recovery in optical WDM mesh networks
IEEE Journal on Selected Areas in Communications(2004)
摘要
This paper investigates survivable lightpath provisioning and fast protection switching for generic mesh-based optical networks employing wavelength-division multiplexing (WDM). We propose subpath protection, which is a generalization of shared-path protection. The main ideas of subpath protection are: 1) to partition a large optical network into smaller domains and 2) to apply shared-path protection to the optical network such that an intradomain lightpath does not use resources of other domains and the primary/backup paths of an interdomain lightpath exit a domain (and enter another domain) through a common domain-border node. We mathematically formulate the routing and wavelength-assignment (RWA) problem under subpath protection for a given set of lightpath requests, prove that the problem is NP-complete, and develop a heuristic to find efficient solutions. Comparisons between subpath protection and shared-path protection on a nationwide network with dozens of wavelengths per fiber show that, for a modest sacrifice in resource utilization, subpath protection achieves improved survivability, much higher scalability, and significantly reduced fault-recovery time.
更多查看译文
关键词
optimisation,lightpath,fault management,routing-wavelength-assignment problem,fast protection,lightpath request,lightpath survivability provisioning,wavelength division multiplexing,optical fibre networks,telecommunication network reliability,wdm,domain-border node,interdomain lightpath,65,wavelength-division multiplexing,computational complexity,shared-path protection,np-completeness,subpath protection,optical network,partitioning,telecommunication network management,large optical network,generic mesh-based optical network,telecommunication network routing,np-complete,protection,fast recovery,optical wdm mesh network,survivable lightpath,primary-backup path,intradomain lightpath,interdomain lightpath exit,nationwide network,resource utilization,mesh network,np completeness
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要