Ms. Akimune made presentations at Technical Committee on IEICE.

The titles and authours are as follows.

Authors: Rumi AKIMUNE, Jun MATSUMOTO, Jumpei MARUKAWA, Takashi KURIMOTO,
Daisuke ISHII, Satoru OKAMOTO, and Naoaki YAMANAKA
Title：A Study of Fast Fault Recover Method using k-Hop Flooding
for Wide Area Layer2 Network
Abstract：A fast fault recovery method using temporary forwarding of frames has been proposed for wide area layer 2 network with high reliability. In the conventional method, the fault detection nodes forward frames based on pre-established recovery table when a fault occurs. The tables, however, are created without consideration on destination node of path, the frames are dropped before the arrival to the destination node. In this paper, a new fast fault recovery method using k-hop flooding is proposed for decrease in frame losses with no arrival to destination node. The proposed method can decrease frame losses with forwarding from fault detection nodes to all neighbor nodes. By computer simulation, it is shown effective range in proposed method from several perspectives.

Mr. Hara made presentations at Technical Committee on Network System (NS).

The titles and authours are as follows.

Authors: Yutaro HARA, Yuji SHIMADA, Takehiro SATO, Kunitaka ASHIZAWA, Kazumasa TOKUHASHI, Daisuke ISHII, Satoru OKAMOTO, and Naoaki YAMANAKA
Title： A Study of Next Generation Metro-Access Hybrid Scalable Network by
Using PLZT Ultra High Speed Optical Wavelength Selective Switch
Abstract：We study a novel optical access network with active optical switches, called ActiON (Active Optical Network), as a next generation access network to replace PON (Passive Optical Network). In this paper, we focus on a scalability of ActiON so that it accommodates 600000 users to propose next generation metro-access hybrid scalable network by using PLZT optical wavelength selective switch. In the evaluation, we discuss about energy consumption and blocking ratio. We show that proposed network reduces 65 % of energy consumption compare to
the present network. Furthermore, blocking ratio of proposed network is always lower than a quality assurance of the Internet service.

Mr. Sato and Nomura made presentations at Technical Committee on Photonic Network (PN) in Februally 28　‐　March 1.

The titles and authours are as follows.

Authors: Takehiro Sato, Kunitaka Ashizawa, Kazumasa Tokuhashi, Daisuke Ishii, Satoru Okamoto, Eiji Oki, and Naoaki Yamanaka
Title： A Design Method of Large Scale Optical Switching Network with Low Optical Loss and High Reliability
Abstract：An optical aggregation network, which connects an giant router and thousands of users in one hop,has proposed to reduce the power consumption of today’s Internet greatly. This paper shows a design method of an all-optical aggregation network using 2×2 PLZT optical switches. The proposed architecture achieves both low optical loss and high reliability by combining the features of tree topology and ring topology.

Authors: Yuki Nomura, Jumpei Maruyama, Haruka Yonezu, Hidetoshi Takeshita, Yuji
Oikawa, Daisuke Ishii, Satoru oKAMOTO, and Naoaki Yamanaka
Title： Path Recon五guration Method Using Next Hop Table for Autonomous GMPLS Control in Energy efficient Network MiDORi
Abstract：Recently, energy savlng Of network is emerglng aS an important problem due to an increase of trafRc and power consumption･ Thus, we have been proposing the MiDORi(Multi-(layer, path, and resources) Dynamically Optimized Routing) network architecture to achieve energy saving by aggregating the traffic using Traffic Engineering and switching off the unused port of network equipment. In MiDORi, NM(Network Manager) Conagures each switch during path reconfiguration･ However, there is a problem that the configuration time becomes huge in large network. This paper proposes autonomous MiDORi network using modified GMPLS (Generalized Multi Protocol Label Switching), in which signaling protocol controls establishment of paths as well as power of ports for fast reconfiguration･ Moreover, in this paper, new path switching method which each node holds next-hop table for power controlling is proposed. Implementation shows that proposed architecture can redllCe 79% of path establishment time.