スズキ　タカヒロ   SUZUKI, Takahiro   鈴木　隆宏 健康科学部 福祉工学科 教授
言語種別	英語
発行・発表の年月	2019/06
形態種別	その他(論文)
査読	査読あり
標題	Effect of Block ACK on Application-Level QoS in IEEE 802.15.6 CSMA/CA Wireless BANs
執筆形態	単独
掲載誌名	Proceedings of ITC-CSCC 2019
掲載区分	国外
出版社・発行元	CORYRIGHT:ITC-CSCC2019 <Hosted by IEIE(Korea), IEICE(Japan), ECTI(Thailand)>
巻・号・頁	pp.O18-02
担当区分	筆頭著者
著者・共著者	◎Takahiro Suzuki
概要	This paper assesses application–level QoS in the case where medical data is transferred with the block acknowledgment (ACK) mechanism of the IEEE 802.15.6 CSMA/CA. In the IEEE 802.15.6 medium access control (MAC), a node can transmit multiple MAC protocol data units (MPDUs) successively as a data block with the block ACK. By simulation, we first examine the effect of the block ACK mechanism on the application–level QoS in the case where medical data and background data are transferred from nodes to the hub. Simulation results show that the block ACK mechanism can improve the average media unit (MU) delay for medical data. We also reveal that the average MU delay for medical data decreases as the MU rate becomes larger, while the throughput for background data deteriorates under heavy traffic conditions. Furthermore, we examine the influence of medical data transmission with the block ACK on emergency data transmission. Numerical results show that the block ACK mechanism can deteriorate the average MU delay for emergency data if a large number of medical MPDUs are transferred successively as a data block.