Hideki Otsuki

An ID/locator split architecture for future networks

The ID/locator split concept has recently been introduced in the standardization activities of ITU-T study group 13 for use in future networks. To contribute to ITU-Ts initiative, we first propose a naming system to configure host-names and identifiers and map them to locators. We then propose a network architecture that is based on the ID/locator split concept and the naming system. The proposed architecture allows the network layer to change protocols and locators without disturbing the upper-layer communication sessions. This capability is helpful for designing efficient solutions for mobility, multi-homing, routing, and security as well as for integrating heterogeneous network layer protocols.

Demonstration of 10 Gbit Ethernet/Optical-Packet Converter for IP Over Optical Packet Switching Network

We developed novel network interfaces, for example 10 Gbit Ethernet to 80 Gbit/s optical-packet (10 GbitE-80 GbitOP) or 80 Gbit/s optical-packet to 10 Gbit Ethernet (80 GbitOP-10 GbitE) converters (collectively called as 10 GbitE/80 GbitOP converters), to connect optical packet switching (OPS) networks with IP technology-based networks. By using newly developed arrayed burst-mode optical packet transmitters/receivers together, the 10 GbitE-80 GbitOP converter at the ingress edge node of the OPS network encapsulates an IP packet into an 80(8lambda&times;10)&nbsp;Gbit/s dense wavelength division multiplexing (DWDM)-based optical packets and generates an optical label based on a lookup table and the destination addresses of the IP packet. The 80 GbitOP-10 GbitE converter at the egress edge node decapsulates the IP packet from the optical packet and generates a 10 GbitE frame accommodating the IP packet according to a lookup table. By using these network interface devices and OPS system based on multiple optical label processing, we achieved, for the first time, 74-km single-mode fiber transmission, switching, and buffering of 80(8lambda&times;10)&nbsp;Gbit/s DWDM-based optical packets encapsulating almost 10 Gbit/s IP packets with error-free operation (IP packet loss rate < 10-6).

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.

All-optical multiple-label-processing based optical packet switch prototype and novel 10 gb ethernet / 80 (8λ × 10) gbps-wide colored optical packet converter with 8- channel array burst-mode packet transceiver

We demonstrate IP-packet/10-Gbit-Ethernet transporting by novel 80-Gbit/s/port optical packet switch prototype with IP/OP converters, packet-transceiver of instantaneous- locking (≪1 ns), and multiple-label-processor of ultra-fast processing (/spl Gt;100 ps) to achieve 7.2- Gbps IP-packet throughput with low packet-loss-rate (<10-6).

Integrated Service Deployment for Active Networks

A key feature of active networks is the capability to dynamically deploy services. In this paper, we present a scheme to classify service deployment mechanisms of existing or future active network architectures. Distributed algorithms (services), as being implemented in active networks, can be described based on active packets or as distributed programs running on active nodes. Although both programming models are basically equivalent, some services are more naturally implemented in either way. This paper proposes an active node architecture that supports the implementation and deployment of services according to both programming models. We point out that a combination of in-band and out-of-band service deployment is needed to dynamically deploy services implemented in either model. Furthermore, we argue that composing services from service logic implemented in either programming model is beneficial for the design of efficient and flexible services. We reason that a service abstraction in the form of a service description language is necessary to cope with real world scenarios.

Field Trial of Signaling Interworking of Multi-carrier ASON/GMPLS Network Domains

A seamless end-to-end call set up over multi-carrier ASON and GMPLS network domains was successfully achieved. Interworking of two ASON network domains and five GMPLS network domains was demonstrated on a nationwide scale.

Multi-ASON and GMPLS network domain interworking challenges

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. In this article, an analysis of the differences between ASON network technologies and GMPLS network technologies, a detailed signaling protocol and routing protocol interworking mechanism, and the interworking experimental results of nationwide ASON and GMPLS network domains are described.

Experimental demonstrations of interworking between an optical packet and circuit integrated network and OpenFlow-based networks

We propose a mechanism for achieving interworking between an optical packet and circuit integrated (OPCI) network and OpenFlow-based networks. Due to the ability of the OPCI network to provide both optical packet switching (OPS) and optical circuit switching (OCS) on the same fiber infrastructure, flows requiring high quality of service can be transferred on lightpaths, while other flows are transferred on large-capacity OPS links. We implemented the interworking function on an OPCI multi-ring network environment and an OpenFlow-enabled network-service testbed. In experiments on Internet Control Message Protocol (ICMP) sending/receiving between end-hosts, we achieved successful interworking between the OPCI network controls and OpenFlow.

Novel Layer-3 IP Packet Switching between 10 Gbps Ethernet and 80 Gbps Optical Packet-Switched Networks

We develop novel layer-3 (L3) Internet protocol (IP) packet switches to connect 80 Gbps WDM-based optical packet switching (OPS) networks with 10 Gbps Ethernet (10GbE). A L3 switch, which is the ingress edge node of the OPS network, generates an optical label according to a look-up table and the destination address of an IP packet, and then encapsulates the almost 10 Gbps IP packet into an 80 Gbps (8-wavelength x 10 Gbps) optical packet Another type of L3 switch, which is the egress edge node of the OPS network, decapsulates the IP packet from the optical packet and generates a lOGbE frame accommodating the IP packet according to a look-up table. We achieve the transmission of 7.2-Gbps IP packets throughput with a packet loss rate under 10-6 and demonstrate smooth UDP/IP-based 3D high-definition television (HDTV) video-streaming via the L3 switches and 80 Gbps WDM-based OPS system.

Extension of Path Computation Element (PCE) Framework for Resource Provisioning Based on User Profile in Dynamic Circuit Network

Dynamic circuit network (DCN) refers to an on-demand virtual circuit (VC) service in which a user makes a request for a circuit in advance via a Web page. On-demand Secure Circuits and Advance Reservation System (OSCARS) is well-known DCN software. All requests in DCN/OSCARS are guaranteed bandwidth. Therefore, the quality of service (QoS) can be determined by the request blocking probability (RBP). Several QoS provisioning mechanisms, such as the bandwidth allocation policy (BAP) and preemption, have been proposed in the literature in order to ensure low RBPs for high-priority users. This paper proposes the extension of path computation elements (PCEs) in OSCARS version (v.) 6, called the UP-PCE, which considers the user attributes in its computation. Our extended OSCARS with the UP-PCE can determine two mechanisms: the control of the available topology and the BAP.