Dr. Okamoto’s paper about ASON and GMPLS domains interworking was published in IEEE Communications Magazine.

Title: “Multi-ASON and GMPLS Network Domain Interworking Challenges”
Authors: Satoru Okamoto (Keio University), Hideki Otsuki (NICT), Tomohiro Otani (KDDI R&D Labs.)
Abstract: 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 IITU-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.