|Affiliation||Department of Electrical and Electronic Information Engineering|
|Fields of Research||Wireless Access Protocol / Multi-hop Communications / Sensor and Ad Hoc Networks|
|Degree||Ph.D. (Keio University)|
|Academic Societies||IEICE / IEEE|
Please append "tut.jp" to the end of the address above.
|Laboratory website URL||http://www.comm.ee.tut.ac.jp/|
|Researcher information URL（researchmap）||Researcher information|
Wireless systems hide limitless possibilities that can enrich our lives, as said by the father of wireless communications, Guglielmo Marconi, "It is dangerous to put limits on wireless." We are aiming to realize new communication networks through wireless access and multi-hop communications, based on communications theory, network architecture and signal processing. Specifically, we undertake research on access control for effectively sharing limited radio resources, network control for cooperative connections and signal processing for high quality communications, for distributed autonomous systems such as sensor and ad hoc networks.
In wireless networks, especially distributed autonomous networks such as sensor and ad hoc networks, it is crucial to keep connectivity high for delivering more data with low latency, and also to save energy for longer time operation. We are aiming to design and build medium access control and topology control protocols so as to utilize and manage wireless resources efficiently for the use of the emerging IoT or trillion sensors universe.
Selected publications and works
 Mochammad Zen Samsono Hadi, Yuichi Miyaji, and Hideyuki Uehara, “An Energy-Efficient Mobile Group Clustering Protocol for Wireless Sensor Networks," IEICE Trans. Commun., vol. E101-B, no.8, Aug. 2018.
 Sho Sasaki, Yuichi Miyaji, and Hideyuki Uehara, “Energy Budget Formulation in Progress-Based Nearest Forwarding Routing Policy for Energy-EfficientWireless Sensor Networks,” IEICE Trans. Info. Sys., vol. E100-D, no. 12, pp. 2808-2817, Dec. 2017. DOI：https://doi.org/10.1587/transinf.2017PAP0010
 Sho Sasaki, Yuichi Miyaji, and Hideyuki Uehara, “A novel framework of routing policy for energy-efficient wireless sensor networks: Progress-based nearest forwarding,” IEICE Communications Express, 2016.
 Daisuke Maeda, Hideyuki Uehara and Mitsuo Yokoyama, “Efficient clustering scheme considering non-uniform correlation distribution for ubiquitous sensor networks,” IEICE Trans. Fundamentals, vol. E90-A, no. 7, pp, 1344-1352, July 2007.
A sensor which converts physical quantities to electrical signals can be a sensing system and create new services when a lot of sensors are assembling together and connecting each other, besides having processing and communication functions. We are aiming to develop new sensing systems exploiting radio wave propagation characteristics such as localization for mobile objects including sensors and persons, as well as interference and channel estimation.
Theme3：Full Duplex Multi-hop Communications
Communication traffic is rapidly growing as widely spreading wireless tools and sensors, which causes wireless resources a critical shortage. In-band full duplex communications can double the capacity in principle than half duplex communications used in current wireless LAN etc., however it must suppress self-interference. In addition, no protocols have been designed for multi-hop communications. We are aiming to develop a self-interference canceler and access protocol for in-band full duplex multi-hop communication systems that can efficiently utilize wireless resources by spatial-temporal control.
Selected publications and works
 K. Komatsu, Y. Miyaji, and H. Uehara, "Basis Function Selection of Frequency-Domain Hammerstein Self-Interference Canceller for In-Band Full-Duplex Wireless Communications," IEEE Trans. on Wirel. Communi. (Early Access) DOI：https://doi.org/10.1109/TWC.2018.2816061
 Kazuki Komatsu, Yuichi Miyaji and Hideyuki Uehara, "Frequency-Domain Hammerstein Self-Interference Canceller for In-Band Full-Duplex OFDM Systems," IEEE Wireless Communications and Networking Conference, Mar. 2017.
 Hiroki Matoba, Yuichi Miyaji and Hideyuki Uehara, "Demo: Multi-hop Wireless Communication System to Evaluate Direction Oriented Routing Protocol," IEEE Vehicular Networking Conference, pp.129-130, Paderborn, Germany, Dec. 2014.
Title of class
Communication Engineering I / Communication Engineering II / Information Networks / Advanced Information and Communication Systems