Paper Info
Title
Dynamic Survivability in WDM Mesh Networks Under Dynamic Traffic
Abstract
Network survivability is a crucial requirement in WDM mesh networks. In this paper, we systematically consider the problem of dynamic survivability with dynamic single link failure in WDM networks under dynamic traffic demands. Specifically, we investigate various protection schemes, such as dedicated path protection (DPP), shared path protection (SPP), dedicated link protection (DLP), shared link protection (SLP), and two restoration schemes, path restoration (PR) and link restoration (LR). Moreover, two new shared protection methods are proposed, i.e., SRLG-based shared link protection (SRLG-SLP) and SRLG-based shared path protection (SRLG-SPP). The SRLG (shared risk link group) constraint defines the availability of protection resources to a working path, which requires that any two working paths sharing the same risk of failure (or in the same SRLG) cannot share the same protection resources. Furthermore, in our study, we consider a more practical dynamic single-link failure model, in which the link-failure-interarrival time and link-failure-holding time are considered as two independent parameters. Based on this link-failure model, extensive simulations are done to analyze and compare the dynamic survivable performance of various protection and restoration schemes. Resource utilization, protection efficiency, restoration efficiency, and service disruption ratio are employed as survivable performance metrics versus traffic load, link-failure frequency, and link-failure reparation time to evaluate the survivable performance. Many meaningful results are given. In addition, we show that the developed SRLG-SLP and SRLG-SPP protection schemes perform very well in terms of protection efficiency and service disruption ratio, while sacrificing some performance in terms of resource utilization.
Year
DOI
Venue
2003
10.1023/A:1023602406566
Photonic Network Communications
Keywords
Field
DocType
WDM mesh networks,dynamic survivability,dynamic single-link-failure,SRLG,survival performance metrics
Wavelength-division multiplexing,Wdm mesh networks,Link protection,Survivability,Traffic load,Computer science,Network survivability,Computer network,Shared risk link group,Path protection,Distributed computing
Journal
Volume
Issue
ISSN
6
1
1572-8188(Series Online ISSN)1387-974X(Series Print ISSN)
Citations 
PageRank 
References 
6
0.55
8
Authors
3
Name
Order
Citations
PageRank
Yun Wang1166.19
Qingji Zeng2428.29
Huandong Zhao360.88