Presentations -

敷設空孔コアファイバを用いた二芯化10G-EPONの動作実験

Satoru Okamoto, Takahiro Ishiyama, Naoaki Yamanaka

IEICE Society Conference, 

2024.09

First Demonstration of Switched RoF Concept Using MEMS Optical Switch a nd High-linearity Installed Hollow Core Fiber Cables

Ryuta Murakami, Kojiro Nishimura, Satoru Okamoto, Yoshihiko Uematsu, Takashi Kurimoto, Naoaki Yamanaka

50th European Conference and Exhibition on Optical Communication (ECOC 2024), 

2024.09

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We have proposed Switched RoF which inserted optical switch in the middle of A-RoF transmission for beyond 5G mobile front haul. Feasibility of adopting MEMS optical switch with installed hollow core fiber and no QoE degradation by handover using optical switching was confirmed.

キャンパス敷設空孔コアファイバケーブルを用いたLocal 5G over PON構築実験

Satoru Okamoto, Naoaki Yamanaka, Hiroyuki Tsuda, Motoharu Matsuura, Takeshi Takagi, Kazunori Mukasa

IEICE Technical Report on Photonic Network, 

2024.08

Disaggregated Computing Access Network using Newly Structured Hollow-Core fiber for AIoT Platform

Naoaki Yamanaka, Takahiro Ishiyama, Satoru Okamoto, Hiroyuki Tsuda, Kazunori Mukasa

2024 IEEE Annual Congress on Artificial Intelligence of Things (AIoT), 

2024.07

Newly structured Hollow-Core Fiber and its open innovation field for Power over fiber, Radio over fiber and ultra-low latency application

Naoaki Yamanaka, Satoru Okamoto, Hiroyuki Tsuda, Motoharu Matsuura, Kazunori Mukasa

24th International Conference on Transparent Optical Networks (ICTON 2024), 

2024.07

1st demonstration of the multi-spot RoF concept using Wi-Fi AP as an em ulated base-station

Kojiro Nishimura, Ryuta Murakami, Yoshihiko Uematsu, Satoru Okamoto, Naoaki Yamanaka

20th International Conference on IP/IoT & Processing+Optical Networks (iPOP 2024), 

2024.06

Location free ONU system by optical power supply over Hollow Core Fiber

Takahiro Ishiyama, Takashi Kurimoto, Satoru Okamoto, Naoaki Yamanaka

20th International Conference on IP/IoT & Processing+Optical Networks (iPOP 2024), 

2024.06

Switched RoF: Toward Personalized Cell Mobile Front Haul Using Optical Switch

Ryuta Murakami, Kojiro Nishimura, Satoru Okamoto, Takashi Kurimoto, Yoshihiko Uematsu, Naoaki Yamanaka

20th International Conference on IP/IoT & Processing+Optical Networks (iPOP 2024), 

2024.06

Power Saving Effects in Switched RoF

Ryuta MURAKAMI, Satoru OKAMOTO, Yoshihiko UEMATSU, Takashi KURIMOTO, Naoaki YAMANAKA

IEICE Technical Committee on Photonic Network (PN) (奄美市社会福祉センター ) , 

2024.03

, 

Oral presentation (general)

(Special Invite Talk) Aiming for the future optical networks －20 years of PN-TC and Keio future optical network open labs-

Naoaki Yamanaka

IEICE Technical Committee on Photonic Network (PN) (奄美市社会福祉センター ) , 

2024.03

, 

Oral presentation (invited, special)

Linux PCによるWiFi APを利用したアナログRoF検証環境の構築

Satoru Okamoto, Ryuta Murakami, Kojiro Nishimura, Naoaki Yamanaka, Motoharu Matsuura

IEICE General Conference, 

2024.03

Method to reduce imbalance charges for electricity retailers using EVs, aiming to balance the interests of both electricity retailers and EV users

Takato IEKI, Mayuko OMICHI, Satoru OKAMOTO, Naoaki YAMANAKA

IEICE Technical Committee on Information Networks (IN) (沖縄コンベンションセンター) , 

2024.02

, 

Oral presentation (general)

Edge computing that utilizes in-network CPUs to achieve high capacity and interruption tolerance with fewer edge servers

Koki Muramatsu, Yoshihiko Uematsu, Satoru Okamoto, Naoaki Yamanaka

International Workshop on Computing, Networking and Communications (CNC 2024), 

2024.02

Time-space synchronized digital twin application for URLLC usingnewly structured Hollow-Core Fiber and its open innovation field

Naoaki Yamanaka

International Conference on Computing, Networking and Communications (ICNC2024), 

2024.02

Resource Allocation of the Virtual Reconfigurable Processors using the Biological Attractor Selection

Satoru Okamoto, Misato Kamio, Chiaki Hara, Naoaki Yamanaka

The 2018 IEICE General Conference (東京電機大学　東京千住キャンパス（東京）) , 

2018.03

, 

Oral presentation (general)

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再構成可能通信処理プロセッサをリソースプールとして取り扱い, 網内のリソースプールを光網で接続してサービス用仮想通信処理プロセッサ(VRCP)を構築することを提案している. リソースプールから処理モジュールを選択して割当てる手法として, 省電力優先及びQoS優先の準最適化アルゴリズムを提案した. 本稿では, 動的にVRCP再構成を行うことでより一層の最適性を実現することを目的として, リソース割当に利用可能なゆらぎ制御手法を分散制御可能とした分散ゆらぎ制御でVRCPリソース割当を実現する手法を提案する.

Flow/Application Triggered SDN control in Hybrid Data-center Network "HOLST"

Yukihiro Imakiire, Masayuki Hirono, Masaki Murakami, Satoru Okamoto, YAMANAKA NAOAKI

41st The Optical Fiber Communication Conference and Exhibition (OFC2018) (San Diego, USA) , 

2018.03

, 

Oral presentation (general)

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We have proposed a new data-center network architecture “HOLST” with dynamic and adaptive network configuration for reducing power consumption. This demonstration shows the method of detecting and assigning flows from traffic and application trigger.

First Experimental Demonstration of Disaggregated Emergency Optical System for Quick Disaster Recovery

Masaki Shiraiwa, Noboru Yoshikane, Sugang Xu, Takehiro Tsuritani, Naoki Miyata, Tatsuo Mori, Masatake Miyabe, Toru Katagiri, Sota Yoshida, Masaki Tanaka, Tomofumi Hayashi, Hidetsugu Sugiyama, Ikuo Satou, Mashito Mikuni, Satoru Okamoto, YAMANAKA NAOAKI, Yoshinari Awaji, Naoya Wada

41st The Optical Fiber Communication Conference and Exhibition (OFC2018) (San Diego, USA) , 

2018.03

, 

Oral presentation (general)

Fast finding method of optical circuit sharing rack groups in the HOLST datacenter network based on time division multiplexing using high-speed optical switches

Masayuki HIRONO, Akira YAMASHITA, Satoru OKAMOTO, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (南種子町商工会館 （鹿児島県）) , 

2018.03

, 

Oral presentation (general)

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近年急激に増加しているデータセンター内の消費電力を削減する手段として, 我々はデータセンターネットワーク向け超高速レイヤ1 スイッチシステム:HOLST(High-speed optical layer 1 switch system for time slot switching based optical data center networks) の研究開発を行っている. 本稿では, HOLST のネットワークアーキテクチャにおいて, 時分割多重により光回線を共有することでトラフィックを最大限収容可能になるよう, PLZT 光 スイッチに接続するラック群を導出する手法を考案した. 想定するトラフィックモデルにおいてシミュレーションを行った結果, ヒューリスティックアルゴリズムはおよそ0.8 秒の実行時間でラック群の組み合わせ探索を行い, 線形計画法による組み合わせ最適解と同等のトラフィック収容性能を発揮した.

Optically interconnected resource pool architecture for future backbone network with service scalability (Invited)

YAMANAKA NAOAKI, Satoru Okamoto, Kodai Yarita, Kazuo Sugai, Takayuki Muranaka

International Conference on Computing, Networking and Communications (ICNC2018) (Maui, Hawaii, USA) , 

2018.03

, 

Oral presentation (general)

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Service scalability is one of the key issue for future networks. For this, we propose new optical interconnected service function pool architecture having flexibility and high-efficiency. The service scalability is a feature which can create new services with combination of multiple functions. In addition, some functions must be realized by VLSI, FPGA, and software (i.e. NFV) according to their required performance. Software based flexible functions has some advantages that service throughput can be changed by control VM performance. Combination of multiple functions are using by optical interconnection that can relax distance and capacity restrictions among functions that realized by different technologies. In this paper, we propose a resource pool architecture that all functional resources in the network are called "resource pool". To create the service, proper resources are selected and interconnected by the optical interconnection. In addition, some simulation and prototype study results are also described. The proposed architecture is useful for future backbone networks.

QoS Guaranteed Virtual Network Function Assignment using the Biological Attractor Selection

Chiaki Hara,Mashito Mikuni,Kodai Yarita,Satoru Okamoto, YAMANAKA NAOAKI

IEICE Technical Report on Photonic Network (南種子町商工会館 （鹿児島県）) , 

2018.03

, 

Oral presentation (general)

　View Summary

ネットワークの機能を仮想化するネットワーク機能仮想化(NFV)の動きが高まり, ユーザの契約状況に応じて適切なネットワーク機能を経由するように経路を制御するサービスファンクションチェイニング(SFC)の研究がなされてきた. SFCにおける仮想ネットワーク機能(VNF)の配置問題において, 動的なチェイン要求の発生という環境変動に対しQoS保証を行うために, すべてのチェインを再構成し直すのは, サービスの中断などオーバヘッドが大きくなるため, VNFの移動回数を最小化する必要がある. ゆらぎ制御は, 生物の脳や生態に共通してみられる制御方式で, 準最適ではあるが, 環境変動に対して適応的に動作可能, また, 局所的な情報を用いることで制御が容易となる手法である. 本論文では, 環境変動に適応的に, またQoSを保証しつつ, かつVNFの移動回数を削減するようVNFの配置問題を解くため, ゆらぎ制御を用いる手法を提案する.