Information Sharing Platform Laboratory,
Graduate School of Information Science and Technology,
Yuki Koizumi skipped the fourth grades of the Undergraduate School of Engineering Science, Osaka University to enter the Graduate School of Information Science and Technology, Osaka University, in 2004. He received his Master of Information Science and Ph.D. of Information Science degrees from Osaka University, Japan, in 2006 and 2009, respectively. Since 2009, he has been an assistant professor at the Graduate School of Information Science and Technology, Osaka University, Japan.
 Junji Takemasa, Yuki Koizumi, and Toru Hasegawa, “Toward an Ideal NDN Router on a Commercial Off-the-shelf Computer,” in Proceedings of the 4th ACM Conference on Information-Centric Networking (ICN 2017), Sep. 2017. (Available at ACM ICN 2017 web site)
Information Centric Networking (ICN) has been gotten much attention due to its built-in functionalities such as caching and mobility-support. One of important research challenges is to reduce power consumed by ICN networks because ICN's packet forwarding and packet-level caching are energy-hungry. As the first step of achieving power-efficient ICN networks, we develop a power consumption model of a multicore software ICN router while taking into account power consumed by energy-hungry computation. The main contributions of this research are three-fold: First, the model is one of the first realistic models which consider ICN packet forwarding and packet-level caching. Second, the model is represented as concise equations with just a few parameters. Third, we apply the model to estimate power consumed by simple networks in order to answer a question which would not be answered without this model.
 Kaito Ohsugi, Junji Takemasa, Yuki Koizumi, Toru Hasegawa, and Ioannis Psaras, "Power Consumption Model of NDN-based Multicore Software Router based on Detailed Protocol Analysis," IEEE Journal on Selected Areas in Communications, vol. 34, issue 5, pp. 1631-1644, May 2016. (Available at IEEE Xplore)
 Toru Hasegawa, Yuto Nakai, Kaito Ohsugi, Junji Takemasa, Yuki Koizumi, and Ioannis Psaras, “Empirically Modeling How a Multicore Software ICN Router and an ICN Network Consume Power,” in Proceedings of ACM Conference on Information-Centric Networking (ICN 2014), Sept. 2014. (Available at ACM ICN 2014 web site)
In this research, we propose an ICN-based message delivery protocol over a cellular network in disasters. Collaborative communication among cellular devices is integrated into the protocol so that power consumed by battery-operated BSs (Base Stations) is reduced when a breakout occurs. A key idea is to reduce consumed radio resources by making cellular devices of which radio propagation quality is better forward messages of neighboring devices. The radio resource reduction contributes to reducing power consumed by a battery-operated BS.
 Suhwuk Kim, Yuki Urata, Yuki Koizumi, and Toru Hasegawa, "Power-saving NDN-based Message Delivery based on Collaborative Communication in Disasters," in Proceedings of IEEE International Workshop on Local and Metropolitan Area Networks (LANMAN 2015), Apr. 2015.
How the mobile Internet accommodates a huge number of IoT devices is an important research challenge since their number grows to several billions. An important observation about IoT device communications is that IoT devices have different characteristics in mobility from traditional mobile devices such as cellular phones. Strict mobility management scheme and session mobility provided by handover functions are not required for the IoT device mobility management. In this research, we focus on IoT communication features, and propose a routing-based mobility architecture for them. Our routing architecture uses the Bloom Filter as a data structure to store routing information. We clarify the effectiveness of our routing architecture in IoT environments.
 Masanori Ishino, Yuki Koizumi, and Toru Hasegawa, “A Study on a Routing-based Mobility Management Architecture for IoT Devices,” in Proceedings of IEEE International Conference on Network Protocols (ICNP 2014) Ph.D. Forum, Oct. 2014.
Information Sharing Platform Laboratory
Graduate School of Information Science and Technology, Osaka University
A-building 5F A510, 1-5 Yamadaoka, Suita, Osaka 565-0871, Japan