Shared-Risk Logical Span Groups in Span-Restorable Optical Networks: Analysis and Capacity Planning Model
نویسندگان
چکیده
منابع مشابه
Capacity design studies of span-restorable mesh transport networks with shared-risk link group (SRLG) effects
We study the total capacity requirements of span-restorable mesh network designs as the percentage of all possible dual failure combinations incident on a common node is increased. Our interest is in questions such as: Are there any guidelines or insights as to how many such SRLGs can be sustained before the capacity penalty becomes severe? Can we diagnose which SRLGs are the most limiting to o...
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The most common aim in designing a survivable network is to achieve restorability against all single span failures, with a minimal investment in spare capacity. This leaves dual-failure situations as the main factor to consider in quantifying how the availability of services benefit from the investment in restorability. We approach the question in part with a theoretical framework and in part w...
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In contemplating mesh-based networking, some operators have expressed concern about the possible effects of span maintenance actions on network restorability, and hence availability. We consider this problem for span-restorable networks and provide two main advances. One is a bi-criteria optimization method that allows a controlled trade-off between the cost of spare capacity and the reduction ...
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Service restorability is a key requirement in optical networks. This means that when wavelength paths are established, both a primary path and a secondary disjoint path have to be set-up, with the secondary path being used for service restoration upon primary path failure. The secondary path may possibly be shared for efficiency. The need for secondary paths imposed by the restorability require...
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Diverse working and protection paths are used in telecommunication networks to increase survivability and availability in case of faults. In selecting these diverse paths, it is important that the two paths do not share any links that share the same risk. This is done by assigning each link to a Shared Risk Link Group (SRLG). In this paper, we extend this concept to nodes and domains. Diverse p...
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ژورنال
عنوان ژورنال: Photonic Network Communications
سال: 2005
ISSN: 1387-974X,1572-8188
DOI: 10.1007/s11107-005-4530-5