News
2011/03/31SINET4 commenced operation (April 1, 2011)

SINET4 commenced operation (April 1, 2011)

The Science Information Network (SINET) is an information and communication network connecting universities and research institutions throughout Japan via nationwide connection points (nodes). It is designed to promote research and education as well as the circulation of scientific information among universities, research institutions, and similar entities. SINET is also connected to research networks such as Internet2 in the U.S. and GÉANT2 in Europe to facilitate dissemination of research information and collaborations over networks.

SINET4 began operations in April 2011, and it replaces the previous SINET3. SINET4 plays an important role as the core component of the Cyber Science Infrastructure(CSI).

2008/12/02Demonstration of Layer-1 Bandwidth-on-Demand (L1 BoD) Service (Dec 2, 2008)

Demonstration of Layer-1 Bandwidth-on-Demand (L1 BoD) Service (2008.12.2)

We successfully demonstrated layer-1 BoD between Kyushu University and Hokkaido University (about 1800 km).

Two layer-1 paths (totaling 2 Gbps) were established with no negative effect for other services between Hokkaido University and Kyushu University. After hitlessly reducing bandwidths of L2/L3 paths by 2Gbps by LCAS, two L1 paths were established on demand via client PC at Hokkaido Univ. Non-compressed HDTV was transmitted between the sites very stably.

BoD Demo 20081202
Fig1. Network structure of the demonstration


    
Fig2. Location of the universitiesFig3. Non-compressed HDTV was transmitted.
2008/02/01Demonstration of Layer-1 Bandwidth-on-Demand (L1 BoD) Service (2008.2.1)

Demonstration of Layer-1 Bandwidth-on-Demand (L1 BoD) Service (2008.2.1)

We successfully demonstrated layer-1 BoD capabilities and are ready to provide on-demand circuit-based QoS services.

Two layer-1 paths (0.9 Gbps x 2) were established with no negative effect for other services between Hokkaido University and NII. After hitlessly reducing bandwidths of L2/L3 paths by 1.8Gbps by LCAS, two L1 paths were established on demand via client PC at Hokkaido Univ. Non-compressed HDTV was transmitted between the sites very stably.


Fig1. Network structure of the demonstration


  
Fig2. Location of NII and Hokkaido Univ.
Fig3. Non-compressed HDTV was transmitted.