@techreport{oai:ipsj.ixsq.nii.ac.jp:00211336, author = {加藤, 新良太 and 高井, 峰生 and 石原, 進 and Arata, Kato and Mineo, Takai and Susumu, Ishihara}, issue = {22}, month = {May}, note = {筆者らは,耐災通信システム実現のため,LoRa や Wi-Fi 等を用いた車車間遅延耐性ネットワークの構築を目指している.本システムでは,緊急車両が LoRa では転送困難な被災地の写真等の大容量データを Wi-Fi による車車間通信 (V2V) で共有する.緊急車両間の Wi-Fi 通信機会は他の被災地に移動する際のすれ違い時に限られる,Wi-Fi 通信時の転送可能データ量の最大化が課題である.しかし,Wi-Fi を用いる V2V での転送可能データ量が最大となる方法等はこれまでに明らかにされていない.本稿では,2.4GHz 帯IEEE 802.11n によるすれ違い時の V2V における TCP 送信データ量と受信信号強度 (RSSI) の変化を実環境で測定し,車が最接近する数秒間にデータが頻繁に転送され,その前後に発生する一時的なRSSI の低下を検出することでその数秒間を予測できることを明らかした., To make a communication system robust even under disastrous circumstances, we have proposed a Vehicular Delay/Disruption Tolerant Network (VDTN) with multiple wireless communication media such as LPWA and Wi-Fi, each of which provides unique wireless communication characteristics to organize heterogeneity for network robustness. For the VDTN performance, it is crucial to maximize the amount of data transferred via Wi-Fi for each communication opportunity, but as far as we know, no paper has proposed a methodology that predicts the behavior of bulk data transmission in inter-vehicular communication (V2V) yet. We performed a field experiment and measured the amount of transmitted data as well as the levels of received signal strength (RSSI) over 2.4GHz IEEE 802.11n-based V2V. The experiment reveals that L2 data frames are transferred frequently in a few second-period while cars are closest, and the seconds can be predicted by detecting temporary RSSI reduction occurred around the period.}, title = {個別認証を伴う無線LAN車車間すれ違い通信における転送可能データ量予測に関する実証的考察}, year = {2021} }