Development of Next-Generation Energy Efficient Network with Optical and Wireless Technology Cooperation

• Project/Area Number: 26280026
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Information network
• Research Institution: Tohoku University
• Principal Investigator: KATO NEI 東北大学, 情報科学研究科, 教授 (00236168)
• Project Period (FY): 2014-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥12,740,000 (Direct Cost: ¥9,800,000、Indirect Cost: ¥2,940,000); Fiscal Year 2017: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2016: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 光通信 / 無線通信 / 省エネルギー / プロトコル / ネットワーク融合 / 光給電

Outline of Final Research Achievements

Energy saving is considered as one of the requirements in 5G as well as mobile communication networks. Cloud-Radio Access Network (C-RAN), which has attracted attention as a next-generation network architecture, mainly consists of two parts: Remote Radio Heads (RRHs) and BaseBand Units (BBUs). They operate with energy saving scheme but such schemes do not cooperate with each other, thereby increasing the energy consumption of the C-RAN. Therefore, considering both schemes is important to optimize the energy consumption of the C-RAN because of the trade-off between energy saving of RRHs and BBUs.
In this study, we propose an energy saving scheme of C-RAN considering both RRHs and BBUs, and confirmed the validity of the scheme.

Academic Significance and Societal Importance of the Research Achievements

近年，移動通信ネットワークにおけるサービス・アプリケーションの要求が増加かつ多様化しており，次世代移動通信ネットワークである5G（第5世代移動通信システム）では，それらの様々な要求に対応するためにシステム容量の大容量化，データ伝送速度の高速化，低遅延化，超多数の端末の同時接続，低コスト・省電力化の5つの要求条件が示されている．
本研究では，C-RAN全体の消費電力を低減するための省電力制御手法を提案し，この提案手法の妥当性を確認した．本提案方式は，今後の移動通信ネットワークで必要不可欠である省電力化の解決策の一つとして利用可能だと結論付けられる．

Research Products

• [Journal Article] Threshold-Based RRH Switching Scheme Considering Baseband Unit Aggregation for Power Saving in a Cloud Radio Access Network (2019)
  • Author(s): Yunseong Lee, Keisuke Miyanabe, Hiroki Nishiyama, Nei Kato, and Takashi Yamada
  • Journal Title: IEEE Systems Journal Volume: - Issue: 3 Pages: 1-13
  • DOI: 10.1109/jsyst.2018.2890130
  • Peer Reviewed
• [Journal Article] A cloud radio access network with power over fiber toward 5G networks: QoE-guaranteed design and operation (2015)
  • Author(s): Keisuke Miyanabe, Katsuya Suto, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-ichi Suzuki
  • Journal Title: IEEE Wireless Communications Volume: 22 Issue: 4 Pages: 1536-1284
  • DOI: 10.1109/mwc.2015.7224728
  • Peer Reviewed
• [Presentation] A Novel Network Design and Operation for Reducing Transmission Power in Cloud Radio Access Network with Power over Fiber (2015)
  • Author(s): Yunseong Lee, Katsuya Suto, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, and Ken-Ichi Suzuki
  • Organizer: IEEE/CIC International Conference on Communications in China (ICCC 2015)
  • Place of Presentation: Shenzhen, China
  • Year and Date: 2015-11-02
  • Int'l Joint Research
• [Presentation] 光給電型無線アクセス網の実現に向けた省電力化技術 (2015)
  • Author(s): 宮鍋慶介、西山大樹、加藤寧
  • Organizer: 電子情報通信学会2015年総合大会
  • Place of Presentation: 立命館大学びわこ・くさつキャンパス（滋賀県草津市）
  • Year and Date: 2015-03-10