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bus location notication service. Accordingly, we plan to experimentally make the service available to the public.e D2D system we developed can be operated without obtaining a license required under the radio wave law, is resistant to mechanical failure and natural disasters and is capable of easily collecting and distributing information from traveling buses, although delay occurs during data transmission. We hope to further explore the system utili-zation.AcknowledgmentWe thank Minato City, Tokyo and Seika Town, Kyoto and other organizations for their cooperation in the testbed operation and demonstration experiments.ReferenceR1http://www.3gpp.org/about-3gpp2http://www.ieee802.org/15/pub/TG8.html3A. Ghosh, et al., “Heterogeneous cellular networks: From theory to practice,” IEEE Comm. Mag., vol.50, no.6, pp.54–64, June 2012.4K. Doppler, M. Rinne, C. Wijting, C. Ribeiro, and K. Hugl, “Device-to-device communication as an underlay to LTE-advanced networks,” IEEE Comm. Mag., vol.47, no.12, pp.42–49, 2009.5K. J. Zou, M. Wang, K. W. Yang, J. Zhang, W. Sheng, Q. Chen, and X. You, “Proximity discovery for device-to-device communications over a cellular network,” IEEE Comm. Mag., vol.52, no.6, pp.98–107, June 2014.6M. Lee, H.-B. Li, and S.-H. Park, “Introduction to Peer Aware Communications (PAC),” https://mentor.ieee.org/802.15/documents?is_dcn=pac&is_group=wng0&is_year=2012.7O.Bello and S. Zeadally, “Intelligent Device-to-Device Communication in the Internet of Things,” IEEE Systems Journal, vol.10, no.3, pp.1172–1182, 2016.8J. Lee, T.Q.S. Quek, “Device-to-Device Communication in Wireless Mobile Social Networks,” 2014 IEEE 79th Vehicular Technology Conference (VTC Spring), May 2014.9H.-B. Li, L. Shan, T. Matsuda, and R. Miura, “Design and deployment of in-frastructure-independent D2D networks without centralized coordination,” International Symposium on Wireless Communication Systems (ISWCS2015), Brussels, Belgium, Aug. 2015.10H.-B. Li, L. Shan, R. Miura, and F. Kojima, “D2D Networks for information diffusion and bus location gaining with local community buses,” (Invited Paper) IEEE 85th Vehicular Technology Conference (VTC-spring 2017), Sydney, Australia, June 2017.11H.-B. Li, R. Miura, and F. Kojima, “Channel access proposal for enabling quick discovery for D2D wireless networks,” International Conference on Computing, Networking and Communications (ICNC 2017), Santa Clara, CA, USA, Jan. 2017.12ARIB STD-T108 Version 1.0, “920MHz-band Telemeter, Telecontrol and Data Transmission Radio Equipment,” Association of Radio Industries and Businesses Feb. 2012.13https://www.km-bus.tokyo/route/odaiba/14http://www.narakotsu.co.jp/rosen/index.htmlHuan-Bang LI, Dr. Eng.Chief Senior Researcher, Wireless Systems Laboratory, Wireless Networks Research CenterWireless communication, Mobile communication, Device-to-Device (D2D), Ultra-Wide Band (UWB)Lin SHAN, Ph.D.Researcher, Wireless Systems Laboratory, Wireless Networks Research CenterWireless communication, Mobile communication, Device-to-Device (D2D), Unmanned Aircraft System (UAS)Ryu MIURA, Dr. Eng.Executive Researcher, Wireless Networks Research CenterMobile communication, Wireless control communicationTakashi MATSUDA, Dr. Eng.Researcher, Wireless Systems Laboratory, Wireless Networks Research CenterWireless sensor network, Wireless power transmission, Body area networkFumihide KOJIMA, Dr. Eng.Director, Wireless Systems Laboratory, Wireless Networks Research CenterWireless communcation, Wireless access controlYasunori OWADA, Dr. Eng.Senior Researcher, Applications Laboratory, Resilient ICT Research CenterDistributed system, Wireless access networkMasugi INOUE, Dr. Eng.Director, International Research Advancement Office, Global Alliance DepartmentWireless network512-7 Development and Field Trial of D2D Networks for Local Area Information Collection and Distribution