Hirotaka Ujikawa

Publication Activity (10 Years)

Years Active: 2010-2024
Publications (10 Years): 19

Top Topics

Congestion Control

Mobile Multimedia

Top Venues

IEEE Internet Things J.

Publications

Yuka Okamoto, Hirotaka Ujikawa, Kota Asaka, Tatsuya Shimada, Tomoaki Yoshida
Proactive congestion control within 1-ms delay at mobile midhaul utilizing parallel traffic prediction and fast switchover of CU and optical path. OFC (2024)
Takumi Harada, Takashi Yamada, Hirotaka Ujikawa, Hiroyuki Uzawa, Junichi Kani, Jun Terada
In-Service Software Updating without Packet Loss for a Time-Critical Function on Optical Access Network System. OFC (2019)
Kota Asaka, Hirotaka Ujikawa, Hiroyuki Uzawa, Hirotaka Nakamura, Jun-ichi Kani, Akihiro Otaka, Jun Terada
Disaggregation of Time-Critical Applications in Flexible Access System Architecture [Invited]. JOCN 11 (1) (2019)
Kota Asaka, Hirotaka Ujikawa, Junichi Kani, Akihiro Otaka
Flexible Access System Architecture (FASA). OFC (2018)
Takumi Harada, Hirotaka Ujikawa, Manabu Yoshino, Noriyuki Oota, Ken-Ichi Suzuki, Akihiro Otaka
Dynamic software updating of OLTs without service interruption. SoftCOM (2017)
Yu Nakayama, Hiroyuki Uzawa, Daisuke Hisano, Hirotaka Ujikawa, Hirotaka Nakamura, Jun Terada, Akihiro Otaka
Efficient DWBA Algorithm for TWDM-PON with Mobile Fronthaul in 5G Networks. GLOBECOM (2017)
Junichi Kani, Manabu Yoshino, Toshikiyo Tanaka, Kota Asaka, Hirotaka Ujikawa, Ken-Ichi Suzuki, Akihiro Otaka
Flexible Access System Architecture to Support Diverse Requirements and Agile Service Creation. ECOC (2017)
Jiajia Liu, Hongzhi Guo, Hiroki Nishiyama, Hirotaka Ujikawa, Ken-Ichi Suzuki, Nei Kato
New Perspectives on Future Smart FiWi Networks: Scalability, Reliability, and Energy Efficiency. IEEE Commun. Surv. Tutorials 18 (2) (2016)
Jiajia Liu, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki
Device-to-Device Communication for Mobile Multimedia in Emerging 5G Networks. ACM Trans. Multim. Comput. Commun. Appl. 12 (5s) (2016)
Hirotaka Ujikawa, Takashi Yamada, Ken-Ichi Suzuki, Akihiro Otaka, Hiroki Nishiyama, Nei Kato
Stand-Alone and Cooperative Deep Sleep for Battery-Driven Optical Network Unit. IEEE Internet Things J. 3 (4) (2016)
Katsuya Suto, Tiago Gama Rodrigues, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki
QoE-Guaranteed and Sustainable User Position Guidance for Post-Disaster Cloud Radio Access Network. GLOBECOM (2016)
Hirotaka Ujikawa, Ken-Ichi Suzuki, Akihiro Otaka, Hiroki Nishiyama, Nei Kato
Energy-Efficient Service Multiplexing on Profile-Based TWDM Access Systems. IEEE Internet Things J. 3 (6) (2016)
Kei Saito, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki
A MPCP-Based Centralized Rate Control Method for Mobile Stations in FiWi Access Networks. IEEE Wirel. Commun. Lett. 4 (2) (2015)
Hiroshi Ou, Yoshihito Sakai, Hirotaka Ujikawa, Takuya Tsutsumi, Toshihito Fujiwara, Yasutaka Kimura, Takeshi Sakamoto, H. Suzuki, Jun Terada, Akihiro Otaka
Integrated Dynamic Bandwidth Allocation for Low Buffer Aggregated Passive Optical Network Systems. JOCN 7 (8) (2015)
Yunseong Lee, Katsuya Suto, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki
A novel network design and operation for reducing transmission power in cloud radio access network with power over fiber. ICCC (2015)
Keisuke Miyanabe, Katsuya Suto, Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki
A cloud radio access network with power over fiber toward 5G networks: QoE-guaranteed design and operation. IEEE Wirel. Commun. 22 (4) (2015)
Jiajia Liu, Shangwei Zhang, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki
Device-to-device communications for enhancing quality of experience in software defined multi-tier LTE-A networks. IEEE Netw. 29 (4) (2015)
Katsuya Suto, Keisuke Miyanabe, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki
QoE-Guaranteed and Power-Efficient Network Operation for Cloud Radio Access Network With Power Over Fiber. IEEE Trans. Comput. Soc. Syst. 2 (4) (2015)
Shangwei Zhang, Jiajia Liu, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki
Average rate analysis for a D2D overlaying two-tier downlink cellular network. ICC (2015)
Hiroko Nomura, Hiroyuki Uzawa, Yuki Arikawa, Yukikuni Nishida, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto
Coordinating energy-efficient CPEs on IEEE 1904.1 compliant systems Via ONU for enhanced power savings: Proposal and demonstration. ICC (2014)
Keisuke Miyanabe, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto
Synchronized Power Saving Mechanisms for Battery-Powered Mobile Terminals in Smart FiWi Networks. VTC Fall (2014)
Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto
Smart FiWi Networks: Challenges and Solutions for QoS and Green Communications. IEEE Intell. Syst. 28 (2) (2013)
Zubair Md. Fadlullah, Hiroki Nishiyama, Yuichi Kawamoto, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto
Cooperative QoS Control Scheme Based on Scheduling Information in FiWi Access Network. IEEE Trans. Emerg. Top. Comput. 1 (2) (2013)
Ko Togashi, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto
On the effect of cooperation between power saving mechanisms in WLANs and PONs. ICC (2013)
Ko Togashi, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto
Cross Layer Analysis on ONU Energy Consumption in Smart FiWi Networks. IEEE Wirel. Commun. Lett. 2 (6) (2013)
Hirotaka Ujikawa, Takashi Yamada, Naoto Yoshimoto
Demonstration of timer-based ONU deep sleep for emergency communication during power failure. GLOBECOM (2013)
Kenta Suzuki, Hiroki Nishiyama, Nei Kato, Hirotaka Ujikawa, Ken-Ichi Suzuki, Naoto Yoshimoto
A bandwidth allocation method to improve user QoS satisfaction without decreasing system throughput in wireless access networks. PIMRC (2012)
Hiroko Nomura, Susumu Nishihara, Hirotaka Ujikawa, Masashi Tadokoro, Takashi Yamada, Naoto Yoshimoto
ONU sleep control by HGW considering users' traffic distribution for energy-aware access networks. APCC (2012)
Ryogo Kubo, Masashi Tadokoro, Hiroko Nomura, Hirotaka Ujikawa, Susumu Nishihara, Ken-Ichi Suzuki, Naoto Yoshimoto
Bandwidth scheduling techniques in TDM-PON supporting inter-ONU communication with network coding for smart grid applications. ICC (2012)
Hirotaka Ujikawa, Takeshi Sakamoto, Naoto Yoshimoto, Hisaya Hadama
Multilevel dynamic bandwidth allocation using buffer observation for cousin-fair access systems. APCC (2011)
Ryogo Kubo, Jun-ichi Kani, Hirotaka Ujikawa, Takeshi Sakamoto, Yukihiro Fujimoto, Naoto Yoshimoto, Hisaya Hadama
Study and Demonstration of Sleep and Adaptive Link Rate Control Mechanisms for Energy Efficient 10G-EPON. JOCN 2 (9) (2010)