Akihiro Otaka - researchr alias

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2019

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. jocnet, 11(1), 2019. [doi]

Coherent Receiver DSP Implemented on a General-Purpose Server for a Full Software-Defined Access SystemSang-Yuep Kim, Takahiro Suzuki, Jun-ichi Kani, Akihiro Otaka. jocnet, 11(1), 2019. [doi]

2018

Flexible Access System Architecture (FASA)Kota Asaka, Hirotaka Ujikawa, Junichi Kani, Akihiro Otaka. ofc 2018: 1-3 [doi]

TDD Pattern Estimation and Auto-Recovery from Estimation Error for Accommodations of Fronthaul and Secondary Services in TDM-PONDaisuke Hisano, Hiroyuki Uzawa, Yu Nakayama, Tatsuya Shimada, Jun Terada, Akihiro Otaka. jocnet, 10(2):104-113, 2018. [doi]

Predictive Bandwidth Allocation Scheme With Traffic Pattern and Fluctuation Tracking for TDM-PON-Based Mobile FronthaulDaisuke Hisano, Hiroyuki Uzawa, Yu Nakayama, Hirotaka Nakamura, Jun Terada, Akihiro Otaka. jsac, 36(11):2508-2517, 2018. [doi]

Wavelength Adjustment of Upstream Signal using AMCC with Power Monitoring for WDM-PON in 5G Mobile EraKazuaki Honda, Hirotaka Nakamura, Kazutaka Hara, Kyosuke Sone, Goji Nakagawa, Yoshio Hirose, Takeshi Hoshida, Jun Terada, Akihiro Otaka. ofc 2018: 1-3 [doi]

Wide-Range Frequency Offset Compensation for CPFSK Used as TOM-Based Digital Coherent PON's Upstream SignalsTakuya Kanai, Masamichi Fujiwara, Ryo Koma, Ryo Igarashi, Noriko Iiyama, Junichi Kani, Akihiro Otaka. ecoc 2018: 1-3 [doi]

Coherent Receiver DSP Implemented on a General-Purpose Server for Full Software-Defined Optical AccessSang-Yuep Kim, Takahiro Suzuki, Junichi Kani, Akihiro Otaka, Toshihiro Hanawa. ofc 2018: 1-3 [doi]

Wide Range Carrier Frequency Offset Estimation Method using Training Symbols with Asymmetric Constellations for Burst-Mode Coherent ReceptionRyo Koma, Masamichi Fujiwara, Ryo Igarashi, Takuya Kanai, Junichi Kani, Akihiro Otaka. ofc 2018: 1-3 [doi]

Burst-Mode Digital Signal Processing That Pre-Calculates FIR Filter Coefficients for Digital Coherent PON UpstreamRyo Koma, Masamichi Fujiwara, Jun-ichi Kani, Ken-ichi Suzuki, Akihiro Otaka. jocnet, 10(5):461-470, 2018. [doi]

Optimization of Quantization Levels for Quantize-and-Forward Relaying with QAM SignalingXinyue Ling, Shinsuke Ibi, Kenji Miyamoto, Seiichi Sampei, Jun Terada, Akihiro Otaka. apsipa 2018: 159-164 [doi]

Wireless performance and mobile fronthaul bandwidth of uplink joint reception with LLR combining in split-PHY processingKenji Miyamoto, Naotaka Shibata, Shigeru Kuwano, Jun Terada, Akihiro Otaka. jcn, 20(6):536-545, 2018. [doi]

Low-Latency Routing Scheme for a Fronthaul Bridged NetworkYu Nakayama, Daisuke Hisano, Takahiro Kubo, Youichi Fukada, Jun Terada, Akihiro Otaka. jocnet, 10(1):14-23, 2018. [doi]

TDD-Based Rapid Fault Detection and Recovery for Fronthaul Bridged NetworkYu Nakayama, Daisuke Hisano, Takahiro Kubo, Youichi Fukada, Jun Terada, Akihiro Otaka. icl, 22(3):498-501, 2018. [doi]

Software module-based 10G Optical Line Terminal for enhancing flexibility of access networksKeita Nishimoto, Yushi Koyasako, Takashi Yamada, Junichi Kani, Akihiro Otaka. netsoft 2018: 500-505 [doi]

Access System Virtualization for Sustainable and Agile DevelopmentAkihiro Otaka. ieicet, 101-B(4):961-965, 2018. [doi]

Software Implementation of PON Physical-Layer Processing for Fully Software-Defined Optical Access SystemsTakahiro Suzuki, Sang-Yuep Kim, Junichi Kani, Akihiro Otaka. ecoc 2018: 1-3 [doi]

10-Gbps Real-time Burst-Frame Synchronization Using Dual-Stage Detection for Full-Software Optical Access SystemsTakahiro Suzuki, Sang-Yuep Kim, Junichi Kani, Akihiro Otaka, Toshihiro Hanawa. ofc 2018: 1-3 [doi]

Reverse Bias Voltage Controlled Burst-Mode Booster SOA in λ-Tunable ONU Transmitter for High-Split-Number TWDM-PONKatsuhisa Taguchi, Kota Asaka, Shunji Kimura, Ken-ichi Suzuki, Akihiro Otaka. jocnet, 10(4):431-439, 2018. [doi]

2017

NG-PON2 Demonstration with Small Delay Variation and Low Latency for 5G Mobile FronthaulKeita Takahashi 0007, Hirotaka Nakamura, Hiroyuki Uzawa, Kenji Miyamoto, Yu Nakayama, Tatsuya Shimada, Jun Terada, Akihiro Otaka. ecoc 2017: 1-3 [doi]

Performance evaluation of CPFSK transmitters for TDM-based digital coherent PON upstreamMasamichi Fujiwara, Ryo Koma, Junichi Kani, Ken-ichi Suzuki, Akihiro Otaka. ofc 2017: 1-3 [doi]

Dynamic software updating of OLTs without service interruptionTakumi Harada, Hirotaka Ujikawa, Manabu Yoshino, Noriyuki Oota, Ken-ichi Suzuki, Akihiro Otaka. softcom 2017: 1-5 [doi]

Automatic Recovery from Estimation Error for Accommodation of TDD-based Fronthaul and Secondary Service in a TDM-PONDaisuke Hisano, Hiroyuki Uzawa, Yu Nakayama, Tatsuya Shimada, Jun Terada, Akihiro Otaka. ecoc 2017: 1-3 [doi]

Gate-Shrunk Time Aware Shaper: Low-Latency Converged Network for 5G Fronthaul and M2M ServicesDaisuke Hisano, Yu Nakayama, Takahiro Kubo, Tatsuya Shimizu, Hirotaka Nakamura, Jun Terada, Akihiro Otaka. globecom 2017: 1-6 [doi]

Effective Utilization of Unallocated Intervals in TDD-Based Fronthaul Employing TDM-PONDaisuke Hisano, Tatsuya Shimada, Hiroshi Ou, Takayuki Kobayashi, Yu Nakayama, Hiroyuki Uzawa, Jun Terada, Akihiro Otaka. jocnet, 9(9), 2017. [doi]

Flexible Access System Architecture to Support Diverse Requirements and Agile Service CreationJunichi Kani, Manabu Yoshino, Toshikiyo Tanaka, Kota Asaka, Hirotaka Ujikawa, Ken-ichi Suzuki, Akihiro Otaka. ecoc 2017: 1-3 [doi]

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 PONRyo Koma, Masamichi Fujiwara, Junichi Kani, Ken-ichi Suzuki, Akihiro Otaka. ecoc 2017: 1-3 [doi]

Performance Evaluation of Ethernet-Based Mobile Fronthaul and Wireless CoMP in Split-PHY ProcessingKenji Miyamoto, Shigeru Kuwano, Tatsuya Shimizu, Jun Terada, Akihiro Otaka. jocnet, 9(1), 2017. [doi]

Low Latency Symbol Level Transmission Scheme for Mobile Fronthaul with Intra PHY Split RAN ArchitectureKenji Miyamoto, Tatsuya Shimizu, Jun Terada, Akihiro Otaka. ecoc 2017: 1-3 [doi]

Unified Design of LLR Quantization and Joint Reception for Mobile Fronthaul Bandwidth ReductionKenji Miyamoto, Shinsuke Ibi, Tatsuya Shimizu, Jun Terada, Akihiro Otaka, Seiichi Sampei. vtc 2017: 1-5 [doi]

Efficient DWBA Algorithm for TWDM-PON with Mobile Fronthaul in 5G NetworksYu Nakayama, Hiroyuki Uzawa, Daisuke Hisano, Hirotaka Ujikawa, Hirotaka Nakamura, Jun Terada, Akihiro Otaka. globecom 2017: 1-6 [doi]

Novel rank-based low-latency scheduling for maximum fronthaul accommodation in bridged networkYu Nakayama, Daisuke Hisano, Takahiro Kubo, Tatsuya Shimizu, Hirotaka Nakamura, Jun Terada, Akihiro Otaka. ofc 2017: 1-3 [doi]

Low-latency routing for fronthaul network: A Monte Carlo machine learning approachYu Nakayama, Daisuke Hisano, Takahiro Kubo, Tatsuya Shimizu, Hirotaka Nakamura, Jun Terada, Akihiro Otaka. icc 2017: 1-6 [doi]

Real-time demonstration of fairness-aware dynamic subcarrier allocation for adaptive modulation in elastic lambda aggregation networkYumiko Senoo, Kota Asaka, Takuya Kanai, Jun Sugawa, Koji Wakayama, Ken-ichi Suzuki, Akihiro Otaka. ofc 2017: 1-3 [doi]

Fairness-Aware Dynamic Sub-Carrier Allocation in Distance-Adaptive Modulation OFDMA-PON for Elastic Lambda Aggregation NetworksYumiko Senoo, Kota Asaka, Takuya Kanai, Jun Sugawa, Hiroyuki Saito, Hideaki Tamai, Naoki Minato, Ken-ichi Suzuki, Akihiro Otaka. jocnet, 9(7):616-624, 2017. [doi]

Auto-Configurable Optical Amplifier for Simple Network Operation and Flexible Access Network Design of a Passive Optical NetworkTakuya Tsutsumi, Yu Nakayama, Shunsuke Kanai, Manabu Kubota, Akihiro Otaka. jocnet, 9(5):446-455, 2017. [doi]

Practical Mobile-DBA Scheme Considering Data Arrival Period for 5G Mobile Fronthaul with TDM-PONHiroyuki Uzawa, Hiroko Nomura, Tatsuya Shimada, Daisuke Hisano, Kenji Miyamoto, Yu Nakayama, Keita Takahashi 0007, Jun Terada, Akihiro Otaka. ecoc 2017: 1-3 [doi]

2016

Efficient accommodation of mobile fronthaul and secondary services in a TDM-PON system with wireless TDD frame monitorDaisuke Hisano, Tatsuya Shimada, Hiroshi Ou, Takayuki Kobayashi, Shigeru Kuwano, Jun Terada, Akihiro Otaka. icc 2016: 1-6 [doi]

Bandwidth allocation scheme based on simple statistical traffic analysis for TDM-PON based mobile fronthaulTakayuki Kobayashi, Hiroshi Ou, Daisuke Hisano, Tatsuya Shimada, Jun Terada, Akihiro Otaka. ofc 2016: 1-3 [doi]

Wide dynamic range burst-mode digital coherent detection using fast ALC-EDFA and pre-calculation of FIR filter coefficientsRyo Koma, Masamichi Fujiwara, Junichi Kani, Ken-ichi Suzuki, Akihiro Otaka. ofc 2016: 1-3 [doi]

Performance evaluation of mobile fronthaul optical bandwidth reduction and wireless transmission in Split-PHY processing architectureKenji Miyamoto, Shigeru Kuwano, Jun Terada, Akihiro Otaka. ofc 2016: 1-3 [doi]

Utilization Comparison of Small-Cell Accommodation With PON-Based Mobile FronthaulYu Nakayama, Kazuki Maruta, Tatsuya Shimada, Tomoaki Yoshida, Jun Terada, Akihiro Otaka. jocnet, 8(12):919-927, 2016. [doi]

Study on protocol and required bandwidth for 5G mobile fronthaul in C-RAN architecture with MAC-PHY splitSusumu Nishihara, Shigeru Kuwano, Kenji Miyamoto, Jun Terada, Akihiro Otaka. apcc 2016: 1-5 [doi]

Passive optical network range applicable to cost-effective mobile fronthaulHiroshi Ou, Takayuki Kobayashi, Tatsuya Shimada, Daisuke Hisano, Jun Terada, Akihiro Otaka. icc 2016: 1-6 [doi]

Hitless λ-Tuning Sequence to Reduce Tuning Delay in λ-Tunable WDM/TDM-PONYumiko Senoo, Shin Kaneko, Tomoaki Yoshida, Jun-ichi Kani, Kota Asaka, Ken-ichi Suzuki, Akihiro Otaka. jocnet, 8(7):486-494, 2016. [doi]

Real-Time Demonstration of PHY Processing on CPU for Programmable Optical Access SystemsTakahiro Suzuki, Sang-Yuep Kim, Junichi Kani, Ken-ichi Suzuki, Akihiro Otaka. globecom 2016: 1-6 [doi]

Energy-Efficient Service Multiplexing on Profile-Based TWDM Access SystemsHirotaka Ujikawa, Ken-ichi Suzuki, Akihiro Otaka, Hiroki Nishiyama, Nei Kato. iotj, 3(6):1427-1436, 2016. [doi]

Stand-Alone and Cooperative Deep Sleep for Battery-Driven Optical Network UnitHirotaka Ujikawa, Takashi Yamada, Ken-ichi Suzuki, Akihiro Otaka, Hiroki Nishiyama, Nei Kato. iotj, 3(4):494-502, 2016. [doi]

2015

High output power OLT/ONU transceivers for 40 Gbit/s symmetric-rate NG-PON2 systemsKota Asaka, Katsuhisa Taguchi, Yuki Sakaue, Ken-ichi Suzuki, Shunji Kimura, Akihiro Otaka. ecoc 2015: 1-3 [doi]

Compact bi-directional EDFAs to support extended power budget class of TWDM-PONMasamichi Fujiwara, Ryo Koma, Ken-ichi Suzuki, Akihiro Otaka. ecoc 2015: 1-3 [doi]

WDM passive optical network managed with embedded pilot tone for mobile fronthaulKazuaki Honda, Takayuki Kobayashi, Tatsuya Shimada, Jun Terada, Akihiro Otaka. ecoc 2015: 1-3 [doi]

Advanced DSP for optical access networks: Challenges and opportunitiesNoriko Iiyama, Junichi Kani, Ken-ichi Suzuki, Akihiro Otaka. ofc 2015: 1-3 [doi]

λ-tuning protection scheme achieving under 50-ms protection time based on MPCP and backup-wavelength pre-assignment on WDM/TDM-PONsShin Kaneko, Tomoaki Yoshida, Shunji Kimura, Ken-ichi Suzuki, Akihiro Otaka. ofc 2015: 1-3 [doi]

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. jocnet, 7(11), 2015. [doi]

Error Vector Magnitude Evaluation of Terahertz Transmitter Employing Optical Frequency CombShigeru Kuwano, Daisuke Iida, Jun Terada, Akihiro Otaka, Naoto Yoshimoto, Shintaro Hisatake, Tadao Nagatsuma. ieicet, 98-C(8):799-807, 2015. [doi]

Split-PHY processing architecture to realize base station coordination and transmission bandwidth reduction in mobile fronthaulKenji Miyamoto, Shigeru Kuwano, Jun Terada, Akihiro Otaka. ofc 2015: 1-3 [doi]

Uplink Joint Reception with LLR Forwarding for Optical Transmission Bandwidth Reduction in Mobile FronthaulKenji Miyamoto, Shigeru Kuwano, Jun Terada, Akihiro Otaka. vtc 2015: 1-5 [doi]

Signaling Based Discard with Flags: Per-Flow Fairness in Ring Aggregation NetworksYu Nakayama, Ken-ichi Suzuki, Jun Terada, Akihiro Otaka. ieicet, 98-B(12):2431-2438, 2015. [doi]

Integrated Dynamic Bandwidth Allocation for Low Buffer Aggregated Passive Optical Network SystemsHiroshi Ou, Yoshihito Sakai, Hirotaka Ujikawa, Takuya Tsutsumi, Toshihito Fujiwara, Yasutaka Kimura, Takeshi Sakamoto, H. Suzuki, Jun Terada, Akihiro Otaka. jocnet, 7(8):814-824, 2015. [doi]

Optical path protection with FEC switching in WDM/TDM-PON for ring access networksYuki Sakaue, Kota Asaka, Yumiko Senoo, Shin Kaneko, Tomoaki Yoshida, Jun Sugawa, Koji Wakayama, Ken-ichi Suzuki, Akihiro Otaka. ecoc 2015: 1-3 [doi]

Demonstration of 512-ONU real-time dynamic-load-balancing with few wavelength reallocations for λ-tunable WDM/TDM-PONYumiko Senoo, Shin Kaneko, Tomoaki Yoshida, Jun Sugawa, Koji Wakayama, Shunji Kimura, Ken-ichi Suzuki, Akihiro Otaka. ofc 2015: 1-3 [doi]

Real-time and fair throughput control in different OSU traffic bias with DLB algorithm for λ-tunable WDM/TDM-PONYumiko Senoo, Shin Kaneko, Tomoaki Yoshida, Jun Sugawa, Koji Wakayama, Ken-ichi Suzuki, Akihiro Otaka. ecoc 2015: 1-4 [doi]

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. jocnet, 7(12), 2015. [doi]

Mobile front-haul employing ethernet-based TDM-PON system for small cellsNaotaka Shibata, Takayoshi Tashiro, Shigeru Kuwano, Naohiko Yuki, Jun Terada, Akihiro Otaka. ofc 2015: 1-3 [doi]

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. jocnet, 7(11), 2015. [doi]

System level performance of uplink transmission in split-PHY processing architecture with joint reception for future radio accessNaotaka Shibata, Kenji Miyamoto, Shigeru Kuwano, Jun Terada, Akihiro Otaka. pimrc 2015: 1375-1379 [doi]

Parallelization of cipher algorithm on CPU/GPU for real-time software-defined access networkTakahiro Suzuki, Sang-Yuep Kim, Junichi Kani, Ken-ichi Suzuki, Akihiro Otaka, Toshihiro Hanawa. apsipa 2015: 484-487 [doi]

Burst-off-level power reduction in λ-tunable transmitter using a reverse bias voltage controlled burst-mode booster SOA for 256-split WDM/TDM-PONKatsuhisa Taguchi, Kota Asaka, Shunji Kimura, Ken-ichi Suzuki, Akihiro Otaka. ofc 2015: 1-3 [doi]

First field trial of 40-km reach and 1024-split symmetric-rate 40-Gbit/s X-tunable WDM/TDM-PONKatsuhisa Taguchi, Kota Asaka, Masamichi Fujiwara, Shin Kaneko, Tomoaki Yoshida, Yoshikazu Fujita, Hideyuki Iwamura, Masayuki Kashima, Satoshi Furusawa, Masahiro Sarashina, Hideaki Tamai, Akiya Suzuki, Toshiaki Mukojima, Shunji Kimura, Ken-ichi Suzuki, Akihiro Otaka. ofc 2015: 1-3 [doi]

Field trial and analysis of N∶1 redundant 10G-EPON using boost-type semiconductor optical amplifierTakuya Tsutsumi, Yoshihito Sakai, Takeshi Sakamoto, Manabu Kubota, Akihiro Otaka. ofc 2015: 1-3 [doi]

Application drivers and trends for future broadband accessTomoaki Yoshida, Tomohiro Taniguchi, Akihiro Otaka. ofc 2015: 1-3 [doi]

2008

Standardization Activities on Broadband Access SystemsKenji Nakanishi, Akihiro Otaka, Yoichi Maeda. ieicet, 91-B(8):2454-2461, 2008. [doi]

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