@techreport{oai:ipsj.ixsq.nii.ac.jp:00178072,
 author = {城間, 隆行 and 中島, 拓真 and 吉見, 真聡 and 策力, 木格 and 吉永, 努 and Takayuki, Shiroma and Takuma, Nakajima and Masato, Yoshimi and Celimuge, WU and Tsutomu, Yoshinaga},
 issue = {65},
 month = {Mar},
 note = {動画配信サービスの普及に伴い，インターネット上の通信量は増大を続けている．特にモバイル環境では，有線通信網よりも急激な増大が見込まれるため，通信量を削減する機構の導入が急務である．モバイル環境においては，端末間の通信 (Device-to-Device, D2D) 機能を介して，近隣端末群のストレージをまとめて一つのキャッシュとして扱う仕組みが効果的である．しかし，端末を跨いだコンテンツ配置計算は負荷が高く，また端末の位置は頻繁に変化するため，計算が追従できず効果がスケールしない．本研究報告では，モバイル環境におけるコンテンツ配信の効率化を目的に，2D 通信を活かした分散キャッシュ機構を提案し，その効果を議論する．端末台数情報のみを用いた軽量かつ柔軟な分散協調キャッシュを提案し，異なる混雑度での評価を通じて，環境変化に追従しつつ高い通信量削減効果を維持できることを確認した．, The amount of Video-On-Demand (VOD) service traffic is explosively growing under the mobile internet environment. To reduce traffic, Device-to-Device communication, which enables direct communication between devices in a long range and high throughput is exploited. Moreover, several distributed cache mechanisms have been proposed to follow growing traffic by offloading to D2D communications. These techniques group neighbor devices to construct a distributed large cache by collaborative technique. However, these techniques require additional information and heavy calculation to determine the arrangement of contents. This report proposes a lightweight method to determine contents arrangement in the crowded devices. Unique ID called tag distinguishes each device and a control signal is sent from a base station to follow the situation changes. Mathematical simulations show that the tag mechanism achieves high traffic offloading rate in both more and less device situations.},
 title = {デバイス間通信を活用する分散協調キャッシュ機構の提案},
 year = {2017}
}