From Survivability and Traffic Grooming in WDM Optical Networks
A subgraph-based routing strategy attempts to provide a passive form of redundancy to optical networks in the event of a given set of failure scenarios such as a single link failure or a single node failure. It is passive in that, before a connection is established, it is subjected to the constraints that it can be routed in the network as a fault free of any given set of failures, and is thus guaranteed in the event of a failure from the set. The end user experiences nominal interruption in service due to network state restoration and it is characterized in . The key characteristics of the subgraph-based routing strategy are as follows.
The redundancy in routing is provided using the resources available in the network.
Fault recovery network states are maintained throughout the operation of the network.
Subgraph fault tolerance provides a 100% guarantee for recovery from all possible predefined failure states.
Subgraph routing is a pro-active path-based fault tolerance strategy.
The network state must be altered to accommodate the new topology of the network caused by a failure state.
The first characteristic highlights one of the most important aspects of the strategy; it does not require the allocation of system transmission resources to ensure recoverability after the detection and location of a link failure. Simply put, there is no explicit link capacity lost due to the routing of backup connections because no active backup connections exist in this strategy. The second...
Products & Services
Topics of Interest
Overview Although the failure of a single component such as a link or a node is the most common failure scenario, it is possible to have multiple links fail simultaneously. In particular,...
10.11 Brenmar Company 8523 South 117th Street Omaha Nebraska 68128 USA Tel; (1) 402 592 3303 Fax: (1) 402 592 8275 www.brenmarco.com Company Overview Brenmar was founded in 1988 as a...
CHAPTER LIST Chapter 16: Industrial Food-Freezing Systems Chapter 17: Meat Products Chapter 18: Poultry Products Chapter 19: Fishery Products Chapter 20: Dairy Products Chapter 21:...
Overview Ruben J.Hernandez, PhD School of Packaging Michigan State University East Lansing, Michigan Plastics are used extensively in packaging due to their outstanding physical,...
One effective way to promote the trial of new consumer packaged goods is with the use of peel-off labels. These labels can contain coupons applied to popular existing products. This has been...