WDM Loop-back Recovery in Mesh Networks
نویسندگان
چکیده
Current means of providing loop-back recovery, which is widely used in SONET, relies on fiber-based recovery, where a fiber is used to back up another fiber. We present WDM-based loop-back recovery for optical networks where wavelengths are used to back up other wavelengths. We present two new algorithms for performing WDM-based loop-back over optical mesh networks. The first algorithm performs recovery for link failures. We compare its operation with known ways of providing loop-back recovery and show that the known methods are not applicable to WDM-based recovery. The second algorithm performs WDM loop-back recovery for node failures. We illustrate the operation of both algorithms and prove their validity. We discuss the advantages of WDM-based loop-back for flexibility in WDM service provisioning.
منابع مشابه
P -cycle Based Protection in Wdm Mesh Networks
p-Cycle Based Protection in WDM Mesh Networks Honghui Li, Ph.D. Concordia University, 2012 WDM techniques enable single fiber to carry huge amount of data. However, optical WDM networks are prone to failures, and therefore survivability is a very important requirement in the design of optical networks. In the context of network survivability, p-cycle based schemes attracted extensive research i...
متن کاملSignificant Impact of P-cycles on Survivable WDM Optical Network
It is known that Wavelength division multiplexing (WDM) technique enables single fiber to carry huge amount of data but optical WDM networks are prone to failures, therefore survivability is a very important requirement in the design of optical networks. In this paper, a comprehensive review about survivability of WDM networks has been discussed focusing on scalable and efficient p-cycles resil...
متن کاملGuaranteed Quality of Recovery in WDM Mesh Networks
Department of Computer Science and Engineering, Yuan-Ze University, Chung-Li, Taiwan, 32026. *National Taiwan College of Performing Arts, Taipei, Taiwan Summary This study proposes a mechanism of guaranteed quality of recovery (GQoR) for Wavelength Division Multiplexing (WDM) mesh networks. Four GQoR levels are used to support customized services, and each of them is mapped to the adaptive reco...
متن کاملDesign of a meta-mesh of chain subnetworks: enhancing the attractiveness of mesh-restorable WDM networking on low connectivity graphs
We have developed a design refinement to increase the capacity efficiency of span-restorable mesh networks on sparse facility graphs. The new approach views the network as a “meta-mesh of chain subnetworks.” This makes the prospect of WDM mesh networking more economically viable than with previous mesh-based designs where the average nodal degree is low. The meta-mesh graph is a homeomorphism o...
متن کاملShared Protection by Concatenated Rings in Optical WDM Networks
The design of survivable all-optical mesh networks based on bidirectional wavelength division multiplexing (WDM) self-healing rings (SHRs) to supply complete protection against any single link failure requires an efficient solution. This paper proposes a shared protection algorithm called shared protection by concatenated rings (SPCR) using selfhealing capability and a pre-configuration mechani...
متن کامل