KEYWORDS: Optical networks, Control systems, Networks, Network architectures, Performance modeling, Information security, Network security, Mobile communications, Signal processing, Interfaces
It is essential for us to do research on collaboration mechanism in management-control plane in
intelligent optical networks. We propose an interaction schemes using mobile agent between the control
plane and management plane to solve information collection delay and management messages congestion.
We construct the integrated platform by mobile agent.
In optical networks, fault detection is an important aspect of network management system, also a prerequisite to the protection/restoration process triggered when abnormal conditions or break-downs of links or nodes happen in the networks. The ever-growing development of optical networks, such as the division of domains and the diversity of the techniques, protocols and administration policies adopted by different network operators, challenges the traditional fault localization methods applied in single domain networks. This paper investigates the fault localization problems for single-domains, and then extends it into multi-domain optical networks. A Multi-Domain Layered Fault Localization (MD-LFL) Model is proposed to address this problem. And then its application scenario is presented to show its effectiveness by sub-dividing the computational complexity among domains and introducing cooperative diagnosis between domains.
Network survivability has been one of the key topics when researching the optical network. For network
survivability, select two routes should be selected that are disjoint when computing the working route and protecting
route or restoring route. The purpose of the shared-protection algorithms under Shared Risk Link Group (SRLG)
constraint is to search two routes that are disjoint from SRLG. Two shared-protection algorithms under Shared Risk Link
Group (SRLG) constraint will be presented; they are KWFF and IFF algorithms. In the KWFF algorithm, the K-Shortest-
Path (KSP) strategy is introduced on every wavelength plane to search usable resources adequately in the network, the
working route and protecting route on every wavelength plane can be selected from the backup route set. And with the
iterative strategy and the double weights of link, IFF algorithm could avoid the trap that can result in deteriorating the
network performance. The simulation and results analysis will be in terms of two parts, the one is from the network
performance, and other one is from the resources utilization. From the simulation results, it will be found that compared
with other algorithms, KWFF and IFF algorithms could decrease the block probability and improve the performance in
the network.
Automatically Switched Optical Network (ASON) is exciting technology in next generation optical
network. And the reliable control plane plays a crucial role in creating high-level services in the transport network based
on the Generalized Multi-Protocol Label Switching (GMPLS) or Automatically Switched Optical Network. The new
survivability testbed is introduced in this paper. Different network performance parameters, especially about protection
and restoration parameters, could be collected or analyzed in this testbed.
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