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A powerful path computation element is a must for the next-generation IP-over-Optical networks to support on-demand service provisioning crossing layers. The main purpose of path computation in multi-layer networks (MLN) is to enable traffic engineering (TE) under a multitude of constraints. A common objective of such traffic engineering is to minimize resource utilization while satisfying all the...
Applicability of GMPLS architecture to Ethernet transport networks is discussed regarding carrier requirements and standardization status. Demonstration results of preliminary implementations of GMPLS controlled Ethernet and PBB-TE are presented.
Seamless end-to-end Ethernet VLAN path provisioning over multi ASON and GMPLS network domains is successfully achieved. Two interworking scenarios 1) ASON and GMPLS, 2) GMPLS and GMPLS are confirmed in both control and data planes.
An all-optical sampling-based Q-factor monitor applicable to multi-bitrated and formatted signals was successfully demonstrated in a network testbed. Quality of GMPLS lightpaths could be diagnosed correlating the actually measured BER.
MPLS extensions such as the wavelength label supporting 3R regenerators and BGP dissemination of wavelength reachability across domain boundaries were proposed. Resilient end-to-end lighpath provisioning was successfully achieved in GMPLS-controlled inter-domain transparent optical networks.
This presentation summarizes enabling technologies for all-optical networking in terms of overall network architecture, control and management plane and quality assurance. All-optical networking testbed demonstration indicates the effectiveness of these technologies from the view point of actual deployment and operation.
Matrix type high-speed optical packet/burst switch is developed that shares high-cost devices for contention avoidance, such as tunable wavelength converters (TWCs) or fiber delay lines (FDLs). In such kind of architectures, there is a technical issue that an overloaded flow causes not only high packet loss probability of itself but also higher packet loss probabilities of other normal flows. We propose...
A field trial of GMPLS-controlled all-optical networking was successfully demonstrated with assistance of OPMs capable of monitoring in-band OSNR. The reliable and stable network operation was achieved thanks to the GMPLS control plane and OPMs.
Dynamic protection mechanism was proposed to provision each individual LSP in a group LSP with differentiated survivability. A resilient multi-QoS burst streams transmission over the group LSP was demonstrated in a GMPLS-controlled transparent optical network.
This article describes the intercarrier external network-to-network interface development challenges at the Kei-han-na Info-Communications Open Laboratory. The E-NNI prototype that was developed provides interworking functionality between the automatically switched optical network control plane function of the ITU-T and the generalized multiprotocol label-switching control plane function of the IETF...
We present test results for all-optical switching transport network based on GMPLS. A LMP-WDM interworking operation between DWDM and PXC was indicated to improve reliability and manageability.
This paper presents demonstrated results of intelligent optical networks using photonics cross connect equipment. The field trial and the all-optical networking test bed confirmed that MEMS-based optical switches were validated in the carriers' actual environment
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