研究者詳細 - 池永　全志

論文 - 池永　全志

分割表示167 件中 1 - 20 件目／全件表示 >>

Performance Evaluation of Spatio-temporal Data Retention System Supporting a Floating Cyber-physical System 招待有り査読有り国際誌

Daiki Nobayashi, Renju Akashi, Kazuya Tsukamoto, Takeshi Ikenaga, Myung J. Lee

Journal of Information Processing ( 情報処理学会 ) 32 566 - 574 2024年08月

Experimental Evaluation for TCP/IP Communication Performance in Multi-Hop Private LoRa Network 査読有り国際誌

Eisho Aramaki, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Goshi Sato, Kenichi Takizawa

Proc. of the 2024 IEEE 30th International Symposium on Local and Metropolitan Area Networks (LANMAN2024) ( IEEE ) 7 - 8 2024年07月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

USA Boston, MA 2024年07月10日 - 2024年07月11日

Low-power wide-area (LPWA) is a major communicaiton technology used in the Internet of Things (Io‘I’), Major sensor networks are constructed using original protocols specific to each LPWA standard and cannot communicate directly with devices connected to the Internet. To enhance the convenience of devices using LPWA, it is necessary to improve their interop-erability with Internet applications with TCP/IP. Previous study have enabled Single-hop TCP/IP communication over Private LoRa. In this study, we construct a multi-hop environment for TCP/IP communication over Private LoRa, and evaluate its performance using both UDP and TCP communication. Previous research has enabled one-to-one communication using UDP and TCP over a Private LoRa interface, an LPWA technology. This study leverages the characteristics of LPWA for ultra-long-distance transmission and implements TCP/IP communication in a multi-hop environment. This paper evaluates the performance of UDP and TCP on actual devices.

DOI： 10.1109/LANMAN61958.2024.10621878

Efficient Frequency Bandwidth Limitation for Wireless-Based Ultrasonic Data Collection Systems 査読有り国際誌

Rio Shigyo, Daiki Nobayashi, Kazuya Tsukamoto, Mitsunori Mizumachi, Takeshi Ikenaga

Journal of Signal Processing ( Research Institute of Signal Processing ) 28 ( 4 ) 129 - 132 2024年07月

記述言語：英語掲載種別：研究論文（学術雑誌）

IoT-based acoustic data collection systems have been proposed for detecting anomalies in mechanical equipment. However, traditional systems using audible sound do not work well due to interference from various sound sources. To solve this problem, we have previously proposed an ultrasonic data collection system, but the clear and high-quality sound required for anomaly detection results in an increase in data volume. This paper proposes a method for extracting only the necessary frequency band based on the periodicity of the target signal, aiming to reduce the amount of data. Our experiments demonstrate that the proposed method efficiently determines the appropriate frequency band in which the characteristics of the target equipment appear, thereby enabling the amount of data to be reduced by more than 45%.

DOI： 10.2299/jsp.28.129

Kyutacar

Fairness Improvement Method Using Explicit Congestion Notification for QUIC 査読有り国際誌

Nobuhiro Uchida, Daiki Nobayashi, Dirceu Cavendish, Takeshi Ikenaga

IEICE Communications Express ( IEICE ) 13 ( 6 ) 222 - 226 2024年04月

記述言語：英語掲載種別：研究論文（学術雑誌）

QUIC is a transport protocol that adds congestion control, retransmission control, and TLS to UDP. QUIC can use the same congestion control algorithms as TCP. In previous work, we have shown that communication performance becomes unfair concerning the buffer size of the shared bottleneck link of two flows, one using CUBIC and the other BBR congestion control algorithms within QUIC. In this study, we improve the communication fairness performance at different bottleneck link buffer sizes by using Round Trip Time (RTT) and Explicit Congestion Notification (ECN) to regulate congestion control aggressiveness when CUBIC and BBR compete within QUIC through actual experiments.

DOI： 10.23919/comex.2024XBL0014

その他リンク： https://www.jstage.jst.go.jp/article/comex/13/6/13_2024XBL0014/_article/-char/ja

Performance Evaluation of Multipath TCP Video Streaming on LEO Satellite/Cellular Networks 査読有り国際誌

Yosuke Komatsu, Dirceu Cavendish, Daiki Nobayashi, Takeshi Ikenaga

Proc. of the Sixteenth International Conference on Evolving Internet (INTERNET 2024) ( IARIA ) 26 - 31 2024年03月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Greece Athens 2024年03月10日 - 2024年03月14日

Video streaming makes most of Internet traffic nowadays, being transported over Hypertext Transfer Protocol/Transmission Control Protocol (HTTP/TCP). Being the predominant transport protocol, TCP stack performance in transporting video streams has become paramount, specially with regard to MultiPath Transport Control Protocol (MPTCP) innovation and multiple client device interfaces currently available. Recently, Low Orbit Satellite networks have become available as a way to cover remote locations where cellular coverage is spotty at best with Internet access. In this paper, we evaluate video streaming performance via cellular and LEO links. Such scenario is commonplace in geographical areas where cellular communication is unreliable, such as disaster and conflict torn situations. We provide an extensive analysis of Bottleneck Bandwidth and Round-trip propagation time (BBR) TCP variant, as well as CUBIC when transporting video streams over terrestrial cellular network (LTE) and LEO (Starlink) access networks. We use network performance level, as well video quality level metrics to characterize quality of multipath video streaming over TCP variants.

Kyutacar

An Efficient Method of Frequency Bandwidth Limitation for Wireless-based Ultrasonic Data Collection System 査読有り国際誌

Rio Shigyo, Daiki Nobayashi, Kazuya Tsukamoto, Mitsunori Mizumachi, Takeshi Ikenaga

Proc. of the 2024 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'24) ( RISP ) 352 - 355 2024年02月

Accuracy Improvement Method for Malicious Domain Detection Using Machine Learning 査読有り国際誌

Toshiki Koga, Daiki Nobayashi, Takeshi Ikenaga

Proc. of 2024 IEEE 21th Consumer Communications & Networking Conference (CCNC 2024) ( IEEE ) 1130 - 1131 2024年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

USA Las Vegas, NV 2024年01月06日 - 2024年01月09日

With the widespread Internet technologies, malware damage also spreads worldwide, making it necessary to address these issues urgently. In some cases, malware-infected terminals use the Domain Name System (DNS) when communicating with the Command and Control (C&C) servers to obtain information for attacks. The previous malware detection focuses on the DNS communication history of malware-infected terminals. However, this method has the problem of poor accuracy in detecting malicious domains when the analysis data is small. This paper proposes a malicious domain detection with the following improvements. The first improvement is adding information on response and time. The second improvement is shortening the query domain names to primary domain names. Further, the proposed method showed improvement in the experiment.

DOI： 10.1109/CCNC51664.2024.10454674

Kyutacar

Performance Evaluation of the Impact Between IEEE 802.11ah and Private LoRa Using 920 MHz Band 査読有り国際誌

Yusuke Takeuchi, Daiki Nobayashi, Takeshi Ikenaga

Proc. of 2024 IEEE 21th Consumer Communications & Networking Conference (CCNC 2024) ( IEEE ) 1126 - 1127 2024年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

USA Las Vegas, NV 2024年01月06日 - 2024年01月09日

IEEE 802.11ah (11ah) is a wireless LAN standard using the 920 MHz band and is expected to be used in the IoT field as one of the Low Power Wide Areas (LPWAs). Many LPWAs share the 920 MHz band and are characterized by low transmission rates but long-range communication. Therefore, there is a high possibility of contending communication in the real-world environment. In this study, we clarify the characteristics of contending communications between 11ah and LoRa according to evaluating the performance using real devices.

DOI： 10.1109/CCNC51664.2024.10454837

Kyutacar

Dynamic Transmission Parameter Settings Based on Data Transmission and Reception Performance for 920MHz LoRa Communication 査読有り国際誌

Rikuto Tanaka, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Goshi Sato, Kenichi Takizawa

Proc. of 2024 IEEE 21th Consumer Communications & Networking Conference (CCNC 2024) ( IEEE ) 1124 - 1125 2024年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

USA Las Vegas, NV 2024年01月06日 - 2024年01月09日

LPWA (Low Power Wide Area) is expected to be a communication technology suitable for the Internet of Things (loT) because of its features. Since LoRa communication has a trade-off between communication range and transmission rate, performance is inherently varied depending on the surrounding environment. Therefore, to achieve stable and efficient communication performance, it is necessary to set appropriate parameters for LoRa depending on the communication environment between the base station and the terminal. We here propose a method for dynamic control of parameter settings based on reception statistics of beacons. The effectiveness of the proposed method is evaluated from the real experiments.

DOI： 10.1109/CCNC51664.2024.10454734

Kyutacar

Packet Recovery Method with Redundant Packets for Large Spatio-Temporal Data Retention 査読有り国際誌

Naoki Tanaka, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga

Proc. of 2024 IEEE 21th Consumer Communications & Networking Conference (CCNC 2024) ( IEEE ) 1132 - 1133 2024年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

USA Las Vegas, NV 2024年01月06日 - 2024年01月09日

Cyber Physical System (CPS) is a system that accumulates information from physical space, analyzes them in cyberspace, and then feeds back the results. We aim to realize a Floating Cyber Physical System (F-CPS), a regionally distributed CPS. We have proposed a large-capacity spatio-temporal data retention system for delivering data and function (application) in the F-CPS. In a previous work, we proposed a data completeness-aware transmission control and evaluated it by simulation. However, considering the movement of obstacles and fluctuation of radio waves in the real environment, packet loss occurs frequently. Thereby, the system may not be able to have complete data and may not function. In this paper, we proposed a method to recover missing data using redundant packets and evaluated its impact on the entire system by testing it with actual equipment.

DOI： 10.1109/CCNC51664.2024.10454686

Kyutacar

Frequency Bandwidth Limitation Method by Autocorrelation for Ultrasonic Data Collection System 査読有り国際誌

Rio Shigyo, Daiki Nobayashi, Kazuya Tsukamoto, Mitsunori Mizumachi, Takeshi Ikenaga

Proc. of the 2023 International Conference on Emerging Technologies for Communications (ICETC 2023) ( Institute of Electronics, Information and Communication Engineers ) 2023年11月

Complementary Data Diffusion Method for Quick Retention of Large Spatio-Temporal Data 査読有り国際誌

Renju Akashi, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Myung Jong Lee

Proc. of the 2023 International Conference on Emerging Technologies for Communications (ICETC 2023) ( Institute of Electronics, Information and Communication Engineers ) 2023年11月

Dynamic Radio Resource Allocation Scheme for the B5G Mobile Systems Evaluated on the B5G/IoT Testbed with High Reliability and High Elasticity 査読有り国際誌

Fumihide Kojima, Renri Nakano, Takeshi Ikenaga

Proc. of the 2023 26th International Symposium on Wireless Personal Multimedia Communications (WPMC2023) 2023年11月

Fairness Improvement Method Using ECNs with Different Congestion Control Algorithms within QUIC 査読有り国際誌

Nobuhiro Uchida, Daiki Nobayashi, Dirceu Cavendish, Takeshi Ikenaga

Proc. of the 31th International Conference on Network Protocols (ICNP 2023) ( IEEE ) 2023年10月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Iceland Reykjavik 2023年10月10日 - 2024年10月13日

QUIC is a transport protocol that adds congestion control, retransmission control, and TLS to UDP. QUIC can use the same congestion control algorithms as TCP. In previous work, when both CUBIC and BBR flows compete within QUIC, we have shown that communication performance becomes unfair with respect to the buffer size of the shared bottleneck link. In this study, we improve the communication performance at different bottleneck link buffer sizes using Round Trip Time (RTT) and Explicit Congestion Notification (ECN) when CUBIC and BBR compete within QUIC through actual experiments.

DOI： 10.1109/ICNP59255.2023.10355640

Kyutacar

その他リンク： https://www.scopus.com/record/display.uri?eid=2-s2.0-85182512038&origin=inward&txGid=8dc079f1526b2e98b38b2b443f6116d3

Experimental Evaluation of Transmission Control Method based on Received Signal Strength for Spatio-Temporal Data Retention 査読有り国際誌

Renju Akashi, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Myung Lee

Proc. of the 2023 IEEE 47th Annual Computers, Software, and Applications Conference (COMPSAC) ( IEEE ) 2023年06月

Improvement of TCP Performance based on Characteristics of Private LoRa Interface 査読有り国際誌

Jumpei Sakamoto, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Goshi Sato, Kenichi Takizawa

Proc. of the 2023 IEEE 47th Annual Computers, Software, and Applications Conference (COMPSAC) ( IEEE ) 2023年06月

BBR Performance over Variable Delay Paths on Multipath TCP Video Streaming 査読有り国際誌

Masayoshi Kondo, Dirceu Cavendish, Daiki Nobayashi, Takeshi Ikenaga

Proc. of the Fifteenth International Conference on Evolving Internet (INTERNET 2023) ( IARIA ) 18 - 23 2023年03月

Complementary Data Transmission Control with Collision Avoidance for Efficient Retention of Large-size Spatio-Temporal Data 査読有り国際誌

Hotaka Kaneyasu, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Myung Lee

Proc. of 2023 IEEE 20th Consumer Communications & Networking Conference (CCNC 2023) ( IEEE ) 2023-January 710 - 711 2023年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

USA Las Vegas, NV 2023年01月08日 - 2023年01月11日

Spatio-temporal aware IoT applications need to deliver the Spatio-Temporal Data (STD), which depends on geographic location and time, to the users in real-time. We have proposed the STD retention system using crowds of vehicles to promote the immediate distribution and utilization of STDs in geographical proximity to the user. However, when the system retains a Large-size STD (LSTD) consisting of multiple packets such as videos and photos, the packet loss due to channel collisions should be suppressed for effective retention of an LSTD. In this paper, we propose a complementary data transmission control method with collision avoidance for LSTD retention and clarify the effectiveness of our proposed method by simulation.

DOI： 10.1109/CCNC51644.2023.10060769

Kyutacar

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85150663283&origin=inward

Performance Evaluation on the Impact of Bottleneck Link Buffer Size under Different Congestion Control Algorithm Competition in QUIC 査読有り国際誌

Nobuhiro Uchida, Daiki Nobayashi, Takeshi Ikenaga, Dirceu Cavendish

Proc. of 2023 IEEE 20th Consumer Communications & Networking Conference (CCNC 2023) ( IEEE ) 2023-January 714 - 715 2023年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

USA Las Vegas, NV 2023年01月08日 - 2023年01月11日

QUIC is a secure, general-purpose transport protocol using congestion and retransmission controls on User Datagram Protocol (UDP). QUIC can use the same congestion control algorithms as Transmission Control Protocol (TCP). Thus, when communication between multiple terminals using QUIC competes, the performance of each terminal depends on the congestion control algorithm adopted by the terminal. In related works, the communication performance was evaluated by simulation when both CUBIC and BBR flows competed in TCP, and the results showed that each communication performance became unfair with the buffer size of the shared bottleneck link. In this study, we verify the communication performance at different bottleneck link buffer sizes when BBR and CUBIC compete through actual experiments.

DOI： 10.1109/CCNC51644.2023.10060682

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85150629349&origin=inward

A Reliability Audit Mechanism based on Multi-layered Blockchain for Spatio-Temporal Data Retention System 査読有り国際誌

Junki Ueda, Kazuya Tsukamoto, Hiroshi Yamamoto, Daiki Nobayashi, Takeshi Ikenaga, Myung Lee

Proc. of 2023 IEEE 20th Consumer Communications & Networking Conference (CCNC 2023) ( IEEE ) 2023-January 939 - 940 2023年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

USA Las Vegas, NV 2023年01月08日 - 2023年01月11日

IoT data includes Spatio-temporal data (STD) that is needed only at a specific time and place. In our previous research, we have proposed the STD data retention system (STD-RS), aiming to construct a novel architecture for STD distributing in a retention area by vehicles. However, since vehicles may distribute the STD in unexpected locations due to GPS errors or malicious behavior in a real environment. Therefore, we propose a reliability audit mechanism based on multi-layered blockchain managing and analyzing the history of STD distribution and vehicles' behavior in each retention area. Through simulation experiment, we demonstrated that our mechanism detects the malfunction of STD-RS effectively.

DOI： 10.1109/CCNC51644.2023.10059819

Kyutacar

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85150622344&origin=inward

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