Standardization Activities on Broadband Access Systems. - Kenji Nakanishi; Akihiro Otaka; Yoichi Maeda (IEICE Trans. Commun., 2008)

Parallelization of cipher algorithm on CPU/GPU for real-time software-defined access network. - Takahiro Suzuki; Sang-Yuep Kim; Junichi Kani; Ken-Ichi Suzuki; Akihiro Otaka; Toshihiro Hanawa (APSIPA, 2015)

High output power OLT/ONU transceivers for 40 Gbit/s symmetric-rate NG-PON2 systems. - Kota Asaka; Katsuhisa Taguchi; Yuki Sakaue; Ken-Ichi Suzuki; Shunji Kimura; Akihiro Otaka (ECOC, 2015)

Compact bi-directional EDFAs to support extended power budget class of TWDM-PON. - Masamichi Fujiwara; Ryo Koma; Ken-Ichi Suzuki; Akihiro Otaka (ECOC, 2015)

WDM passive optical network managed with embedded pilot tone for mobile fronthaul. - Kazuaki Honda; Takayuki Kobayashi; Tatsuya Shimada; Jun Terada; Akihiro Otaka (ECOC, 2015)

Optical path protection with FEC switching in WDM/TDM-PON for ring access networks. - Yuki Sakaue; Kota Asaka; Yumiko Senoo; Shin Kaneko; Tomoaki Yoshida; Jun Sugawa; Koji Wakayama; Ken-Ichi Suzuki; Akihiro Otaka (ECOC, 2015)

Real-time and fair throughput control in different OSU traffic bias with DLB algorithm for λ-tunable WDM/TDM-PON. - Yumiko Senoo; Shin Kaneko; Tomoaki Yoshida; Jun Sugawa; Koji Wakayama; Ken-ichi Suzuki; Akihiro Otaka (ECOC, 2015)

Advanced DSP for optical access networks: Challenges and opportunities. - Noriko Iiyama; Junichi Kani; Ken-Ichi Suzuki; Akihiro Otaka (OFC, 2015)

λ-tuning protection scheme achieving under 50-ms protection time based on MPCP and backup-wavelength pre-assignment on WDM/TDM-PONs. - Shin Kaneko; Tomoaki Yoshida; Shunji Kimura; Ken-Ichi Suzuki; Akihiro Otaka (OFC, 2015)

Split-PHY processing architecture to realize base station coordination and transmission bandwidth reduction in mobile fronthaul. - Kenji Miyamoto; Shigeru Kuwano; Jun Terada; Akihiro Otaka (OFC, 2015)

Demonstration of 512-ONU real-time dynamic-load-balancing with few wavelength reallocations for λ-tunable WDM/TDM-PON. - Yumiko Senoo; Shin Kaneko; Tomoaki Yoshida; Jun Sugawa; Koji Wakayama; Shunji Kimura; Ken-ichi Suzuki; Akihiro Otaka (OFC, 2015)

Mobile front-haul employing ethernet-based TDM-PON system for small cells. - Naotaka Shibata; Takayoshi Tashiro; Shigeru Kuwano; Naohiko Yuki; Jun Terada; Akihiro Otaka (OFC, 2015)

First field trial of 40-km reach and 1024-split symmetric-rate 40-Gbit/s X-tunable WDM/TDM-PON. - Katsuhisa Taguchi; Kota Asaka; Masamichi Fujiwara; Shin Kaneko; Tomoaki Yoshida; Yoshikazu Fujita; Hideyuki Iwamura; Masayuki Kashima; Satoshi Furusawa; Masahiro Sarashina; Hideaki Tamai; Akiya Suzuki; et al. (OFC, 2015)

Burst-off-level power reduction in λ-tunable transmitter using a reverse bias voltage controlled burst-mode booster SOA for 256-split WDM/TDM-PON. - Katsuhisa Taguchi; Kota Asaka; Shunji Kimura; Ken-Ichi Suzuki; Akihiro Otaka (OFC, 2015)

Field trial and analysis of N∶1 redundant 10G-EPON using boost-type semiconductor optical amplifier. - Takuya Tsutsumi; Yoshihito Sakai; Takeshi Sakamoto; Manabu Kubota; Akihiro Otaka (OFC, 2015)

Application drivers and trends for future broadband access. - Tomoaki Yoshida; Tomohiro Taniguchi; Akihiro Otaka (OFC, 2015)

System level performance of uplink transmission in split-PHY processing architecture with joint reception for future radio access. - Naotaka Shibata; Kenji Miyamoto; Shigeru Kuwano; Jun Terada; Akihiro Otaka (PIMRC, 2015)

Uplink Joint Reception with LLR Forwarding for Optical Transmission Bandwidth Reduction in Mobile Fronthaul. - Kenji Miyamoto; Shigeru Kuwano; Jun Terada; Akihiro Otaka (VTC Spring, 2015)

Error Vector Magnitude Evaluation of Terahertz Transmitter Employing Optical Frequency Comb. - Shigeru Kuwano; Daisuke Iida; Jun Terada; Akihiro Otaka; Naoto Yoshimoto; Shintaro Hisatake; Tadao Nagatsuma (IEICE Trans. Electron., 2015)

Signaling Based Discard with Flags: Per-Flow Fairness in Ring Aggregation Networks. - Yu Nakayama; Ken-Ichi Suzuki; Jun Terada; Akihiro Otaka (IEICE Trans. Commun., 2015)

Fast OLT-Protection Method Based on Normal MPCP and Backup Wavelength Pre-assignment on WDM/TDM-PONs [Invited]. - Shin Kaneko; Tomoaki Yoshida; Shunji Kimura; Ken-Ichi Suzuki; Akihiro Otaka (JOCN, 2015)

Integrated Dynamic Bandwidth Allocation for Low Buffer Aggregated Passive Optical Network Systems. - Hiroshi Ou; Yoshihito Sakai; Hirotaka Ujikawa; Takuya Tsutsumi; Toshihito Fujiwara; Yasutaka Kimura; Takeshi Sakamoto; H. Suzuki; Jun Terada; Akihiro Otaka (JOCN, 2015)

512-ONU Real-Time Dynamic Load Balancing With Few Wavelength Reallocations in 40 Gbps λ-Tunable WDM/TDM-PON [Invited]. - Yumiko Senoo; Tomoaki Yoshida; Shin Kaneko; Jun Sugawa; Koji Wakayama; Shunji Kimura; Ken-Ichi Suzuki; Akihiro Otaka (JOCN, 2015)

Performance Evaluation of Mobile Front-Haul Employing Ethernet-Based TDM-PON With IQ Data Compression [Invited]. - Naotaka Shibata; Takayoshi Tashiro; Shigeru Kuwano; Naohiko Yuki; Youichi Fukada; Jun Terada; Akihiro Otaka (JOCN, 2015)

Study on protocol and required bandwidth for 5G mobile fronthaul in C-RAN architecture with MAC-PHY split. - Susumu Nishihara; Shigeru Kuwano; Kenji Miyamoto; Jun Terada; Akihiro Otaka (APCC, 2016)

Real-Time Demonstration of PHY Processing on CPU for Programmable Optical Access Systems. - Takahiro Suzuki; Sang-Yuep Kim; Junichi Kani; Ken-Ichi Suzuki; Akihiro Otaka (GLOBECOM, 2016)

Efficient accommodation of mobile fronthaul and secondary services in a TDM-PON system with wireless TDD frame monitor. - Daisuke Hisano; Tatsuya Shimada; Hiroshi Ou; Takayuki Kobayashi; Shigeru Kuwano; Jun Terada; Akihiro Otaka (ICC, 2016)

Passive optical network range applicable to cost-effective mobile fronthaul. - Hiroshi Ou; Takayuki Kobayashi; Tatsuya Shimada; Daisuke Hisano; Jun Terada; Akihiro Otaka (ICC, 2016)

Bandwidth allocation scheme based on simple statistical traffic analysis for TDM-PON based mobile fronthaul. - Takayuki Kobayashi; Hiroshi Ou; Daisuke Hisano; Tatsuya Shimada; Jun Terada; Akihiro Otaka (OFC, 2016)

Wide dynamic range burst-mode digital coherent detection using fast ALC-EDFA and pre-calculation of FIR filter coefficients. - Ryo Koma; Masamichi Fujiwara; Junichi Kani; Ken-Ichi Suzuki; Akihiro Otaka (OFC, 2016)

Performance evaluation of mobile fronthaul optical bandwidth reduction and wireless transmission in Split-PHY processing architecture. - Kenji Miyamoto; Shigeru Kuwano; Jun Terada; Akihiro Otaka (OFC, 2016)

Energy-Efficient Service Multiplexing on Profile-Based TWDM Access Systems. - Hirotaka Ujikawa; Ken-Ichi Suzuki; Akihiro Otaka; Hiroki Nishiyama 001; Nei Kato (IEEE Internet Things J., 2016)

Stand-Alone and Cooperative Deep Sleep for Battery-Driven Optical Network Unit. - Hirotaka Ujikawa; Takashi Yamada; Ken-Ichi Suzuki; Akihiro Otaka; Hiroki Nishiyama 001; Nei Kato (IEEE Internet Things J., 2016)

Utilization Comparison of Small-Cell Accommodation With PON-Based Mobile Fronthaul. - Yu Nakayama; Kazuki Maruta; Tatsuya Shimada; Tomoaki Yoshida; Jun Terada; Akihiro Otaka (JOCN, 2016)

Hitless λ-Tuning Sequence to Reduce Tuning Delay in λ-Tunable WDM/TDM-PON. - Yumiko Senoo; Shin Kaneko; Tomoaki Yoshida; Jun-ichi Kani; Kota Asaka; Ken-Ichi Suzuki; Akihiro Otaka (JOCN, 2016)

Automatic Recovery from Estimation Error for Accommodation of TDD-based Fronthaul and Secondary Service in a TDM-PON. - Daisuke Hisano; Hiroyuki Uzawa; Yu Nakayama; Tatsuya Shimada; Jun Terada; Akihiro Otaka (ECOC, 2017)

First-time Demonstration of Automatic Service Restoration by Using Inter-Central-Office OLT handover and Optical Path Switching in Metro-Access Network. - Takuya Kanai; Yumiko Senoo; Kota Asaka; Jun Sugawa; Hideaki Tamai; Hiroyuki Saito; Naoki Minato; Atsushi Oguri; Seiya Sumita; Takehiro Sato; Nobuhiko Kikuchi; Shun-ichi Matsushita; et al. (ECOC, 2017)

Flexible Access System Architecture to Support Diverse Requirements and Agile Service Creation. - Junichi Kani; Manabu Yoshino; Toshikiyo Tanaka; Kota Asaka; Hirotaka Ujikawa; Ken-Ichi Suzuki; Akihiro Otaka (ECOC, 2017)

High Sensitivity and Wide Dynamic Range Burst-Mode Coherent Receiver that Controls Gains of a SOA and TIAs for Long-Reach and High-Splitting-Ratio PON. - Ryo Koma; Masamichi Fujiwara; Junichi Kani; Ken-Ichi Suzuki; Akihiro Otaka (ECOC, 2017)

Low Latency Symbol Level Transmission Scheme for Mobile Fronthaul with Intra PHY Split RAN Architecture. - Kenji Miyamoto; Tatsuya Shimizu; Jun Terada; Akihiro Otaka (ECOC, 2017)

NG-PON2 Demonstration with Small Delay Variation and Low Latency for 5G Mobile Fronthaul. - Keita Takahashi 007; Hirotaka Nakamura; Hiroyuki Uzawa; Kenji Miyamoto; Yu Nakayama; Tatsuya Shimada; Jun Terada; Akihiro Otaka (ECOC, 2017)

Practical Mobile-DBA Scheme Considering Data Arrival Period for 5G Mobile Fronthaul with TDM-PON. - Hiroyuki Uzawa; Hiroko Nomura; Tatsuya Shimada; Daisuke Hisano; Kenji Miyamoto; Yu Nakayama; Keita Takahashi 007; Jun Terada; Akihiro Otaka (ECOC, 2017)

Gate-Shrunk Time Aware Shaper: Low-Latency Converged Network for 5G Fronthaul and M2M Services. - Daisuke Hisano; Yu Nakayama; Takahiro Kubo; Tatsuya Shimizu; Hirotaka Nakamura; Jun Terada; Akihiro Otaka (GLOBECOM, 2017)

Efficient DWBA Algorithm for TWDM-PON with Mobile Fronthaul in 5G Networks. - Yu Nakayama; Hiroyuki Uzawa; Daisuke Hisano; Hirotaka Ujikawa; Hirotaka Nakamura; Jun Terada; Akihiro Otaka (GLOBECOM, 2017)

Low-latency routing for fronthaul network: A Monte Carlo machine learning approach. - Yu Nakayama; Daisuke Hisano; Takahiro Kubo; Tatsuya Shimizu; Hirotaka Nakamura; Jun Terada; Akihiro Otaka (ICC, 2017)

Performance evaluation of CPFSK transmitters for TDM-based digital coherent PON upstream. - Masamichi Fujiwara; Ryo Koma; Junichi Kani; Ken-Ichi Suzuki; Akihiro Otaka (OFC, 2017)

Novel rank-based low-latency scheduling for maximum fronthaul accommodation in bridged network. - Yu Nakayama; Daisuke Hisano; Takahiro Kubo; Tatsuya Shimizu; Hirotaka Nakamura; Jun Terada; Akihiro Otaka (OFC, 2017)

Real-time demonstration of fairness-aware dynamic subcarrier allocation for adaptive modulation in elastic lambda aggregation network. - Yumiko Senoo; Kota Asaka; Takuya Kanai; Jun Sugawa; Koji Wakayama; Ken-Ichi Suzuki; Akihiro Otaka (OFC, 2017)

Dynamic software updating of OLTs without service interruption. - Takumi Harada; Hirotaka Ujikawa; Manabu Yoshino; Noriyuki Oota; Ken-Ichi Suzuki; Akihiro Otaka (SoftCOM, 2017)

Unified Design of LLR Quantization and Joint Reception for Mobile Fronthaul Bandwidth Reduction. - Kenji Miyamoto; Shinsuke Ibi; Tatsuya Shimizu; Jun Terada; Akihiro Otaka; Seiichi Sampei (VTC Spring, 2017)

Effective Utilization of Unallocated Intervals in TDD-Based Fronthaul Employing TDM-PON. - Daisuke Hisano; Tatsuya Shimada; Hiroshi Ou; Takayuki Kobayashi; Yu Nakayama; Hiroyuki Uzawa; Jun Terada; Akihiro Otaka (JOCN, 2017)

Performance Evaluation of Ethernet-Based Mobile Fronthaul and Wireless CoMP in Split-PHY Processing. - Kenji Miyamoto; Shigeru Kuwano; Tatsuya Shimizu; Jun Terada; Akihiro Otaka (JOCN, 2017)

Fairness-Aware Dynamic Sub-Carrier Allocation in Distance-Adaptive Modulation OFDMA-PON for Elastic Lambda Aggregation Networks. - Yumiko Senoo; Kota Asaka; Takuya Kanai; Jun Sugawa; Hiroyuki Saito; Hideaki Tamai; Naoki Minato; Ken-Ichi Suzuki; Akihiro Otaka (JOCN, 2017)

Auto-Configurable Optical Amplifier for Simple Network Operation and Flexible Access Network Design of a Passive Optical Network. - Takuya Tsutsumi; Yu Nakayama; Shunsuke Kanai; Manabu Kubota; Akihiro Otaka (JOCN, 2017)

Optimization of Quantization Levels for Quantize-and-Forward Relaying with QAM Signaling. - Xinyue Ling; Shinsuke Ibi; Kenji Miyamoto; Seiichi Sampei; Jun Terada; Akihiro Otaka (APSIPA, 2018)

Wide-Range Frequency Offset Compensation for CPFSK Used as TOM-Based Digital Coherent PON's Upstream Signals. - Takuya Kanai; Masamichi Fujiwara; Ryo Koma; Ryo Igarashi 001; Noriko Iiyama; Junichi Kani; Akihiro Otaka (ECOC, 2018)

Software Implementation of PON Physical-Layer Processing for Fully Software-Defined Optical Access Systems. - Takahiro Suzuki; Sang-Yuep Kim; Junichi Kani; Akihiro Otaka (ECOC, 2018)

Software module-based 10G Optical Line Terminal for enhancing flexibility of access networks. - Keita Nishimoto; Yushi Koyasako; Takashi Yamada; Junichi Kani; Akihiro Otaka (NetSoft, 2018)

Flexible Access System Architecture (FASA). - Kota Asaka; Hirotaka Ujikawa; Junichi Kani; Akihiro Otaka (OFC, 2018)

Wavelength Adjustment of Upstream Signal using AMCC with Power Monitoring for WDM-PON in 5G Mobile Era. - Kazuaki Honda; Hirotaka Nakamura; Kazutaka Hara; Kyosuke Sone; Goji Nakagawa; Yoshio Hirose; Takeshi Hoshida; Jun Terada; Akihiro Otaka (OFC, 2018)

Coherent Receiver DSP Implemented on a General-Purpose Server for Full Software-Defined Optical Access. - Sang-Yuep Kim; Takahiro Suzuki; Junichi Kani; Akihiro Otaka; Toshihiro Hanawa (OFC, 2018)

Wide Range Carrier Frequency Offset Estimation Method using Training Symbols with Asymmetric Constellations for Burst-Mode Coherent Reception. - Ryo Koma; Masamichi Fujiwara; Ryo Igarashi 001; Takuya Kanai; Junichi Kani; Akihiro Otaka (OFC, 2018)

10-Gbps Real-time Burst-Frame Synchronization Using Dual-Stage Detection for Full-Software Optical Access Systems. - Takahiro Suzuki; Sang-Yuep Kim; Junichi Kani; Akihiro Otaka; Toshihiro Hanawa (OFC, 2018)

TDD-Based Rapid Fault Detection and Recovery for Fronthaul Bridged Network. - Yu Nakayama; Daisuke Hisano; Takahiro Kubo; Youichi Fukada; Jun Terada; Akihiro Otaka (IEEE Commun. Lett., 2018)

Access System Virtualization for Sustainable and Agile Development. - Akihiro Otaka (IEICE Trans. Commun., 2018)

Wireless performance and mobile fronthaul bandwidth of uplink joint reception with LLR combining in split-PHY processing. - Kenji Miyamoto; Naotaka Shibata; Shigeru Kuwano; Jun Terada; Akihiro Otaka (J. Commun. Networks, 2018)

TDD Pattern Estimation and Auto-Recovery from Estimation Error for Accommodations of Fronthaul and Secondary Services in TDM-PON. - Daisuke Hisano; Hiroyuki Uzawa; Yu Nakayama; Tatsuya Shimada; Jun Terada; Akihiro Otaka (JOCN, 2018)

Burst-Mode Digital Signal Processing That Pre-Calculates FIR Filter Coefficients for Digital Coherent PON Upstream. - Ryo Koma; Masamichi Fujiwara; Jun-ichi Kani; Ken-Ichi Suzuki; Akihiro Otaka (JOCN, 2018)

Low-Latency Routing Scheme for a Fronthaul Bridged Network. - Yu Nakayama; Daisuke Hisano; Takahiro Kubo; Youichi Fukada; Jun Terada; Akihiro Otaka (JOCN, 2018)

Reverse Bias Voltage Controlled Burst-Mode Booster SOA in λ-Tunable ONU Transmitter for High-Split-Number TWDM-PON. - Katsuhisa Taguchi; Kota Asaka; Shunji Kimura; Ken-Ichi Suzuki; Akihiro Otaka (JOCN, 2018)

Predictive Bandwidth Allocation Scheme With Traffic Pattern and Fluctuation Tracking for TDM-PON-Based Mobile Fronthaul. - Daisuke Hisano; Hiroyuki Uzawa; Yu Nakayama; Hirotaka Nakamura; Jun Terada; Akihiro Otaka (IEEE J. Sel. Areas Commun., 2018)

Disaggregation of Time-Critical Applications in Flexible Access System Architecture [Invited]. - Kota Asaka; Hirotaka Ujikawa; Hiroyuki Uzawa; Hirotaka Nakamura; Jun-ichi Kani; Akihiro Otaka; Jun Terada (JOCN, 2019)

Coherent Receiver DSP Implemented on a General-Purpose Server for a Full Software-Defined Access System. - Sang-Yuep Kim; Takahiro Suzuki; Jun-ichi Kani; Akihiro Otaka (JOCN, 2019)