多重リングバッファ機構を用いた実時間通信とIP通信との両立手法

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2014/08/01

タイトル(英語): Parallel Implementation of Real-Time Communication and IP Communication by using Multiple Ring Buffers

著者名: 上田　和樹（慶應義塾大学理工学部システムデザイン工学科），鞠谷　達士（慶應義塾大学理工学部システムデザイン工学科），矢向　高弘（慶應義塾大学理工学部システムデザイン工学科）

著者名(英語): Kazuki Ueda (Department of System Design Engineering, Faculty of Science and Technology, Keio University), Tatsushi Kikutani (Department of System Design Engineering, Faculty of Science and Technology, Keio University), Takahiro Yakoh (Department of System Design Engineering, Faculty of Science and Technology, Keio University)

キーワード: イーサネット，実時間通信，実時間オペレーティングシステム，遠隔操作　　Ethernet，Real-Time Communication，Real-Time Operating System，Teleoperation

要約(英語): In this paper, an Ethernet device using two ring buffers was implemented in order to achieve a parallel realization of a real-time communication and an IP communication. Using a conventional device driver, it is difficult to realize such a parallel realization. This is because the non real-time frames (IP frames) are processed using a NAPI mechanism, which introduces large delay and variation. Therefore, processing flows of the real-time frames (RT frames) must be separated from that of IP frames. A proposed mechanism was implemented by modifying the existing open source device driver to realize the flow separation mentioned above. By the modifications of the device driver, the RT frames and the IP frames can be distinguished and managed in the different ring buffers. RT frames are sent to a real-time frame ring buffer and they are processed immediately by using a hardware interrupt. IP frames are processed regularly by the conventional Linux network stack. By implementing them, the proposed device driver achieved 100µs or lower RTT (Round Trip Time) with a real-time communication in parallel with 500Mbit/s or wider bandwidth of IP traffic load. This paper shows the design, the implementation, and the evaluation of the priority processing device driver.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.134 No.8 （2014） 特集：産業界における新たな通信・ネットワーク技術の活用

本誌掲載ページ: 1031-1038 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/134/8/134_1031/_article/-char/ja/