Hirotaka Ujikawa

Device-to-device communications for enhancing quality of experience in software defined multi-tier LTE-A networks

Jiajia Liu, Shangwei Zhang, Nei Kato et al. · IEEE Network · 2015 · 190 citations

Cellular Networks, Mobile Data Offloading, Engineering +13

Study and Demonstration of Sleep and Adaptive Link Rate Control Mechanisms for Energy Efficient 10G-EPON

Ryogo Kubo, Jun‐ichi Kani, Hirotaka Ujikawa et al. · Journal of Optical Communications and Networking · 2010 · 142 citations

Free-space Optical Network, Electrical Engineering, Energy Harvesting +14

New Perspectives on Future Smart FiWi Networks: Scalability, Reliability, and Energy Efficiency

Jiajia Liu, Hongzhi Guo, Hiroki Nishiyama et al. · IEEE Communications Surveys & Tutorials · 2015 · 142 citations

Engineering, Fiwi Integration, Energy Efficiency +11

A cloud radio access network with power over fiber toward 5G networks: QoE-guaranteed design and operation

Keisuke Miyanabe, Katsuya Suto, Zubair Md. Fadlullah et al. · IEEE Wireless Communications · 2015 · 37 citations

Engineering, Optical Wireless Communication, Green Networking +16

Smart FiWi Networks: Challenges and Solutions for QoS and Green Communications

Zubair Md. Fadlullah, Hiroki Nishiyama, Nei Kato et al. · IEEE Intelligent Systems · 2013 · 36 citations

Engineering, Smart Fiwi Networks, Wireless Lan +15