Simulation and Basic Experiment of Inter Radio System Handover for Cognitive Radio. - Seishi Hanaoka; Junji Yamamoto; Koji Wakayama; Satoshi Yoshizawa; Tetsuhiko Hirata (PIMRC, 2007)

On a real-time scheme for the estimation of volatility. - Shigeyoshi Ogawa; Koji Wakayama (Monte Carlo Methods Appl., 2007)

Design and Evaluation of 10 Gbps Optical Access System Using Optical Switches. - Koji Wakayama; Michitaka Okuno; Jun Sugawa; Daisuke Mashimo; Hiroki Ikeda; Kenichi Sakamoto (IEICE Trans. Commun., 2010)

MPCP based active optical access network with PLZT high-speed optical switch. - Kazumasa Tokuhashi; Kunitaka Ashizawa; Daisuke Ishii; Satoru Okamoto; Naoaki Yamanaka; Koji Wakayama; Keiichi Nashimoto (Opt. Switch. Netw., 2012)

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)

Adaptive FEC control in downstream collaborating with traffic control in OLT for WDM/TDM-PON. - Jun Sugawa; Koji Wakayama; Hidehiro Toyoda (ECOC, 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)

Simultaneous multi-ONU wavelength switching method for coexistence of different λ-tuning times in WDM/TDM-PON. - Jun Sugawa; Koji Wakayama; Hidehiro Toyoda (OFC, 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)

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)

Wavelength Switching Method that Cooperates with Traffic Control for λ-Tunable WDM/TDM-PON. - Jun Sugawa; Koji Wakayama (IEICE Trans. Commun., 2017)