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謝辞SUNは、現京都大学原田博司教授により、IEEE 802.15.4g [1]として標準化され、同じく規格認証団体Wi-SUNアライアンス [11]の設立を通じて社会展開が推進されている。加えて、本報告の一部の研究開発は、内閣府 戦略的イノベーション創造プログラム（SIP）「次世代農林水産業創造技術」（管理法人：農研機構 生物系特定産業技術研究支援センター）によって実施された。【参考文献【1IEEE802.15.4g, “Part 15.4: Low-Rate Wireless Personal Area Networks (LR-WPANs), Amendment 3: Physical Layer (PHY) Specifications for Low-Data-Rate, Wireless, Smart Metering Utility Networks,” 2012.2Y. Rachlin, R. Negi, and P. Khosla, “Sensing capacity for discrete sensor network applications,” in Conf. Rec. 2005 IEEE Information Processing in Sensor Networks, pp.126–132.3J. L. Hill and D. E. Culler, “Mica: a wireless platform for deeply embed-ded networks,” 2002 IEEE Micro 22, pp.12–24.4W. Ye, J. Heidemann, and D. Estrin, “An Energy-Efficient MAC protocol for Wireless Sensor Networks,” in Conf. Rec. 2002 IEEE Computer and Communications Societies (INFOCOM), pp.1567–1576.5T. v. Dam and K. Langendoen, “An Adaptive Energy-Efficient MAC Protocol for Wireless Sensor Networks,” in Conf. Rec. 2003 Embedded Networked Sensor Systems (SenSys), pp.171–180.6A. El-Hoiydi and J.-D. Decotignie, “WiseMAC: an ultra low power MAC protocol for the downlink of infrastructure wireless sensor networks,” in Conf. Rec. 2004 International Symposium on Computers and Communications, pp.244–251, vol.1.7W. R. Heinzelman, A. Chandrakasan, and H. Balakrishnan, “Energy-efficient communication protocol for wireless microsensor networks,” in Conf. Rec. 2000 Hawaii International Conference on System Sciences, pp.1–10, vol.2.8F. Kojima and H. Harada, “Superframe Division Multi-Hop Data Collection with Aggregation on Wi-SUN Profile for ECHONET Lite,” Conf. Rec. 2014 IEEE Wireless Communications and Networking Conference Workshops, pp.116–1219IEEE802.15.4e, “Part 15.4: Low-Rate Wireless Personal Area Networks (LR-WPANs), Amendment 1: MAC sublayer,” 2012.10IEEE802.15.4, “Part 15.4: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area Networks (WPAN),” 2009.11Wi-SUN alliance, “Wi-SUN alliance,” http://www.wi-sun.org/児島史秀 （こじま　ふみひで）ワイヤレスネットワーク総合研究センターワイヤレスシステム研究室室長博士（工学）無線通信、無線アクセス制御28　　　情報通信研究機構研究報告 Vol. 63 No. 2 （2017）2　地上通信技術の研究開発