気球を用いたアドホックネットワークの電波伝搬特性に関する検討

摘要

This paper reports on a statistical character of the radio path to examine the stability of the communication quality of ad hoc wireless network "Sky mesh" temporarily constructed and use during recovery from a large-scale natural disaster recovery. Communication quality is quickly changed due to swing of the communication nodes hung by the balloon with a wind. In order to investigate the relation of the swing of nodes and the propagation characteristic, the posture sensor was equipped in the BOX accommodating communication node. We performed RSSI measurement experiment at Niigata University in August 2008, and at Yamakoshi, Nagaoka-city in October 2008. In this paper, we describe the relationship of statistical character, the posture sensor, and communication quality of the skymesh propagation path based on experimental result.%大規模自然災害時に臨時に構築されるアドホックネットワーク“スカイメッシュ”の通信品質の安定化や通信方式の検討を目的とした電波伝搬路の統計的性質を報告する．気球に吊下げられた通信端末の風による揺れによって通信品質が変動する．通信端末の揺れと伝搬特性の関係を調べるために通信端末の収容箱内に姿勢センサを搭載し，2008年8月に新潟大学構内，10月に長岡市旧山古志村で通信品質測定実験を行なった．本稿では実験概要及び実験結果から求めたスカイメッシュ伝搬路の統計的性質，姿勢センサ，及び通信品質の関係を示す．