Abstract
This paper studies the problem of signal-quality-guaranteed lightpath provisioning in survivable translucent optical networks under dynamic traffic. A new protection scheme, called regeneration-segment protection (RSP), is proposed. Provisioning approaches with shared path protection and shared RSP are presented. Two main signal quality constraints are integrated with the provisioning problem. Different regenerator placement strategies for working path and protection path are employed. Joint path selection method is used to select the "optimal" working-protection pair. With the above considerations, survivable lightpath provisioning with signal-quality-guarantees is achieved in a cost-effective manner. Results show that in a moderate-size network, RSP has less blocking probability than path protection when the network load is low or modest. Besides, RSP obtains better performance in terms of recovery time than path protection in all network scenarios.
Highlights
The all-optical transparent network has been considered as a promising candidate for the generation backbone network to provide large bandwidth at low cost
In [3, 4], the problem to design a survivable translucent optical network was formulated as an integer linear programming (ILP) problem, and these work focused on how to sparsely place regenerators in the network to minimize the number of regenerators and survive network failures at the same time
We study dynamic lightpath provisioning with signal-quality-guarantees in survivable translucent optical networks
Summary
The all-optical transparent network has been considered as a promising candidate for the generation backbone network to provide large bandwidth at low cost. In a translucent optical network implemented with sparse regeneration, every node contains a photonic cross-connect (PXC) fabric and an optional shared regenerator bank. This is the type of network considered in this paper. Lightpath provisioning in survivable ideal optical networks, in which transmission is considered error-free and no regeneration is needed, has been extensively studied for both static traffic and dynamic traffic. Lightpath provisioning in survivable translucent optical networks is an open issue, and work are done only for static traffic. This paper is devoted to study lightpath provisioning with signal-quality-guarantees in translucent optical networks under dynamic traffic. We present provisioning approaches with path protection and RSP.
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