Ultra-low power MAC protocol complied with RIT in IEEE 802.15.4e for wireless smart utility networks. - Jun Fujiwara; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada; Sota Tsuchiya; Takuya Kawata (PIMRC, 2016)

A Broadcast Protocol for IEEE 802.15.4e RIT Based Wi-SUN Systems. - Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (VTC Spring, 2017)

Experimental Evaluation and Analysis of F-RIT Low Power MAC Protocol Complied with IEEE 802.15.4e. - Ryota Okumura; Jun Fujiwara; Keiichi Mizutani; Hiroshi Harada (WCNC, 2017)

A dynamic routing protocol supporting mobile nodes in Wi-SUN FAN systems. - Thidarut Junjalearnvong; Takuya Habara; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (WPMC, 2017)

IEEE 802.15.4g Based Wi-SUN Communication Systems. - Hiroshi Harada; Keiichi Mizutani; Jun Fujiwara; Kentaro Mochizuki; Kentaro Obata; Ryota Okumura (IEICE Trans. Commun., 2017)

Practical Analysis of CSL Low Power MAC Protocol Based on IEEE 802.15.4e Frame Structure. - Kai Samejima; Ryota Okumura; Takuya Habara; Keiichi Mizutani; Hiroshi Harada (WPMC, 2018)

Enhanced F-RIT Protocol for Wireless Smart Utility Networks with High Traffic Bi-Directional Communications. - Ryota Okumura; Jun Fujiwara; Keiichi Mizutani; Hiroshi Harada (IEICE Trans. Commun., 2018)

Performance Evaluation of Multi-hop Network Configuration for Wi-SUN FAN Systems. - Thidarut Junjalearnvong; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (CCNC, 2019)

Analysis and Experimental Verification of F-RIT Protocol for Wireless Smart Utility Network. - Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (CCNC, 2019)

Possibility of Dynamic Spectrum Sharing System by VHF-band Radio Sensor and Machine Learning. - Takayuki Hayashida; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (DySPAN, 2019)

Stabilization of Multi-Hop Routing Construction in Wi-SUN FAN Systems. - Daiki Hotta; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (CCNC, 2020)

A Home Area Heterogeneous Wireless Management Scheme by Wi-SUN FAN and Wi-Fi Systems. - Kiyoshi Mizutani; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (CCNC, 2020)

Dependable Source Routing Scheme for Multi-Hop Networks Based on Receiver-Initiated MAC Protocol. - Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (CCNC, 2020)

Evaluation of CSL-based Low Power MAC Protocol for Wireless Smart Metering Networks. - Kai Samejima; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (CCNC, 2020)

Wireless Smart Ubiquitous Network by CSL-based Low Power MAC Protocol. - Kai Samejima; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (CCNC, 2020)

A High-speed Wi-SUN FAN Network by Highly-Dense Frequency Hopping. - Hidetomo Ochiai; Kiyoshi Mizutani; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (VTC Fall, 2020)

A Scheduling Scheme For Channel Hopping In Wi-Sun Fan Systems Toward Data Throughput Enhancement. - Robby Wayong; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (VTC Spring, 2020)

Coexistence of Synchronous and Asynchronous MAC Protocols for Wireless IoT Systems in Sub-Gigaherz Band. - Kiyoshi Mizutani; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (WF-IoT, 2020)

Data Rate Enhancement for IEEE 802.15.4 Based FSK Transmission Scheme. - Yueying Xiang; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (WF-IoT, 2020)

A Routing Protocol toward Reliable Mobile Communication in Wi-SUN FAN. - Robby Wayong; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (CCNC, 2021)

A Novel Routing Method with Load-Balancing in Wi-SUN FAN Network. - Rei Hirakawa; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (WF-IoT, 2021)

Efficient Polling Communications for Multi-Hop Networks Based on Receiver-Initiated MAC Protocol. - Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (IEICE Trans. Commun., 2021)

Feasibility Study of Wi-SUN JUTA Profile-Compliant F-RIT Protocol. - Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (IEICE Trans. Commun., 2021)

Efficient Bi-Directional Communications for Low-Power Wireless Mesh Network. - Ryota Okumura (2021)

IEEE 802.15.4g/4x-Based Orthogonal Frequency-Division Multiplexing Transmission Scheme for Wide-Area and Mobile IoT Communication Systems. - Shunsuke Kadoi; Hidetomo Ochiai; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada (IEEE Internet Things J., 2022)

Metropolis-Hastings algorithm in joint-attention naming game: experimental semiotics study. - Ryota Okumura; Tadahiro Taniguchi; Yoshinobu Hagiwara; Akira Taniguchi (Frontiers Artif. Intell., 2023)

Co-Creative Learning via Metropolis-Hastings Interaction between Humans and AI. - Ryota Okumura; Tadahiro Taniguchi; Akira Taniguchi; Yoshinobu Hagiwara (CoRR, 2025)