Implementation and Evaluation of Layer-1 Bandwidth-on-Demand Capabilities in SINET3

Abstract

This paper describes the implementation and evaluation of layer-1 bandwidth-on-demand (BoD) capabilities in the Japanese academic backbone network, called SINET3. The network has a nationwide GMPLS-based layer-1 platform and provides reservation-based and signaling-based BoD services. The overall architecture for providing BoD services including its capabilities, user interface, path calculation, and interface to drive the layer-1 platform are described. Actual examples of BoD services and evaluations of the path setup/release time in the network are also presented.

Expansion of bandwidth-on-demand capabilities in Japanese academic backbone network

“…On the other hand, although the BoD services mainly targeted data-intensive applications in the beginning, as they have gained recognition, some users that need relatively small amounts of bandwidth such as tens of Mbps have become interested in using BoD services. In order to open up the possibilities for a wide application of BoD services, we are approaching layer-2 BoD services that have simple Web interfaces very similar to those of layer-1 BoD services [5].…”

“…The Japanese academic backbone network, called SINET3, started BoD services as one of the layer-1 services in 2008 and has been used to setup/release more than 500 layer-1 end-to-end paths for research projects and demonstrations so far [3]- [5]. Functions for improving the usability and to use the network resource more flexibly have been developed and introduced into the layer-1 BoD server, which controls and manages the BoD layer-1 services, in response to requests from users and network operators.…”

Highly available network design and resource management of SINET4

“…Even when link congestions occur due to burst traffic or detoured traffic by a link failure, the network can maintain the stable connection state between IP routers by definitely transferring control protocol packets with QoS control functions. For higher availability for layer-1 services, we can obtain the required bandwidth from the multiple routes between core nodes by using VCAT and EdmondsKarp algorithm [26]. For example, we can obtain the required bandwidth between Tokyo and Osaka nodes from two routes, Tokyo-Nagoya-Osaka and Tokyo-KanazawaOsaka routes.…”

“…We developed an L1OD server for this dynamic layer-1 paths setup/release and bandwidth change. The L1OD server receives user requests, such as destinations, bandwidths, and durations, via simple Web screens, calculates the best routes, controls the layer-1 switches through their operation system via CORBA interface [23], and manages the network resources [26]. Upon receipt of path setup/release orders from the L1OD server, [2,16] to set up and release these layer-1 paths.…”

“…Advanced multi-layer VPN services and ondemand services, which started provided by the third version, SINET3 [25,26], have encouraged more collaboration and increased data-intensive applications. As the use of these services has increased nationwide, the network was requested to be higher-speed and more reliable.…”