Kenichi Ogaki

Nationwide GMPLS field trial using different types (MPLS/TDM/lambda) of switching capable equipment from multiple vendors

A GMPLS field trial using different types of switching capable equipments from multiple vendors was conducted on a nationwide scale and the setup of MPLS/TDM/lambda hierarchical LSP was successfully achieved ensuring GMPLS interoperability in a multilayer for the first time.

Multi-layer Network Management System integrated with a Network Planning Tool for IP/Optical integrated network

A multi-layer NMS was successfully developed to manage the optical network and the MPLS network. The integrated network-planning tool could appropriately provide the optimized routes for a new LSP and all the existing LSPs.

Prototype demonstration of integrating MPLS/GMPLS network operation and management system

Integrating architecture of the management plane for IP/MPLS and GMPLS network was proposed and the developed prototype was successfully demonstrated in terms of functions such as an automatic topology discovery, a correlation between MPLS and GMPLS networks and a provisioning of a GMPLS LSP.

A Study on Cross-Layer Multi-Constraint Path Computation for IP-Over-Optical Networks

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 applicable constraints. In this study, we investigate a variety of MLN path computation methods based on real-world control plane implementations and network settings. We present some techniques for handling the specific TE constraints that concern the IP-over-Optical networks. Experimental results are presented for performance evaluation and comparison of the investigated multiconstraint path computation methods and techniques.

Field trial of 63 channels 40 Gbit/s dispersion-managed soliton WDM signal transmission over 320 km NZ-DSFs

Field trial of 63 channels 40 Gbit/s dispersion-managed soliton WDM signal transmission was successfully demonstrated over 320 km (4 /spl times/ 80 km) installed NZ-DSFs. The obtained Q factor on average was 15.4 dB, and very stable long-term performance was confirmed without PMD compensation.

Power managed optical point-to-multipoint (P2MP) tree signalling demonstration in GMPLS-controlled wavelength switched optical networks

Dynamic control to graft and prune optical point-to-multipoint trees was successfully demonstrated in a WSON testbed by utilizing GMPLS signaling extensions. By using wavelength selective switch with variable optical power split function, a power managed P2MP tree could be constructed.

A multi-area MPLS/GMPLS interoperability trial over ROADM/OXC network

This article describes the first multi-area multiprotocol label switching and generalized MPLS interoperability trial over a reconfigurable optical add/drop multiplexer and optical cross-connect network. The interoperability trial demonstrated the routing of label switched paths over a multi-area GMPLS controlled ROADM/OXC network and the control of Ethernet over MPLS transport service on top of the GMPLS network. The trial was conducted using various network elements provided by 14 institutions and was carried out in Tokyo and Virginia. This article introduces the motivation for the trial, technical issues related to controlling multiarea MPLS/GMPLS networks, test network topology, and experimental results. The results show that the interior gateway routing protocol based multi-area routing architecture is a promising solution for the nationwide deployment of GMPLS networks within a carrier domain. In addition, this article discusses the technical issues of routing constraints in ROADM/OXC networks and the limit of multiarea routing without the Path Computation Element Protocol.

Proposal of the Architecture of a QoS Assured Network by Cooperating between IP Flow Control and MPLS DiffServ-TE

This paper proposes a network architecture to achieve a QoS assured network, which is composed of two QoS control technologies such as IP flow control and MPLS DiffServ-TE. IP flow control technology is utilized to treat IP packets as an IP flow distinguished by source and destination IP addresses, ports, protocol and priority and to apply the CAC function on the per-flow basis. MPLS DiffServ-TE is also used to accommodate multiple IP flows along the LSP via a bandwidth guarantee with certain service classes. By using the network testbed, we confirmed some of functions in our proposed architecture of the QoS assured network worked properly following the CAC capability of flow state routing and LSP-based bandwidth guarantee of MPLS DiffServ-TE. Multiple IP flows can be appropriately conveyed over the assigned LSP. Moreover, we verified the operation of the prototype NMS to monitor IP flows, LSPs and the inclusion relationship between them. And we also derived a policy to set the bandwidth for CAC at the edge router for effective utilization of bandwidth.

Multi-area MPLS/GMPLS Interoperability Trial Over 14-Vendor Packet/TDM/ROADM/OXC Network

A multi-area MPLS/GMPLS interoperability trial was successfully conducted using various types of network elements from 14 vendors for the first time. The results show that the interior gateway routing protocol based multi-area routing architecture is a promising solution to achieve nationwide deployment of GMPLS networks within a carrier domain.

Peer/overlay hybrid optical network using protocol gateways of GMPLS and OIF-UNI/NNI

Peer/overlay hybrid optical networks with protocol gateways of GMPLS and OIF-UNI/NNI were demonstrated for the first time. UNI connections were successfully established over a single TDM/photonic GMPLS domain as well as OIF E-NNI-based multiple domains.