Faculty Profiles - IKENAGA Takeshi

Papers - IKENAGA Takeshi

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Performance Evaluation of Spatio-temporal Data Retention System Supporting a Floating Cyber-physical System Invited Reviewed International journal

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

Journal of Information Processing ( Information Processing Society of Japan ) 32 566 - 574 2024.08

Experimental Evaluation for TCP/IP Communication Performance in Multi-Hop Private LoRa Network Reviewed International journal

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 2024.07

Language：English Publishing type：Research paper (international conference proceedings)

USA Boston, MA 2024.07.10 - 2024.07.11

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 Reviewed International journal

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

Journal of Signal Processing ( Research Institute of Signal Processing ) 28 ( 4 ) 129 - 132 2024.07

Language：English Publishing type：Research paper (scientific journal)

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 Reviewed International journal

Nobuhiro Uchida, Daiki Nobayashi, Dirceu Cavendish, Takeshi Ikenaga

IEICE Communications Express ( IEICE ) 13 ( 6 ) 222 - 226 2024.04

Language：English Publishing type：Research paper (scientific journal)

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

Other Link： 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 Reviewed International journal

Yosuke Komatsu, Dirceu Cavendish, Daiki Nobayashi, Takeshi Ikenaga

Proc. of the Sixteenth International Conference on Evolving Internet (INTERNET 2024) ( IARIA ) 26 - 31 2024.03

Language：English Publishing type：Research paper (international conference proceedings)

Greece Athens 2024.03.10 - 2024.03.14

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 Reviewed International journal

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 2024.02

Accuracy Improvement Method for Malicious Domain Detection Using Machine Learning Reviewed International journal

Toshiki Koga, Daiki Nobayashi, Takeshi Ikenaga

Proc. of 2024 IEEE 21th Consumer Communications & Networking Conference (CCNC 2024) ( IEEE ) 1130 - 1131 2024.01

Language：English Publishing type：Research paper (international conference proceedings)

USA Las Vegas, NV 2024.01.06 - 2024.01.09

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 Reviewed International journal

Yusuke Takeuchi, Daiki Nobayashi, Takeshi Ikenaga

Proc. of 2024 IEEE 21th Consumer Communications & Networking Conference (CCNC 2024) ( IEEE ) 1126 - 1127 2024.01

Language：English Publishing type：Research paper (international conference proceedings)

USA Las Vegas, NV 2024.01.06 - 2024.01.09

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 Reviewed International journal

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 2024.01

Language：English Publishing type：Research paper (international conference proceedings)

USA Las Vegas, NV 2024.01.06 - 2024.01.09

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 Reviewed International journal

Naoki Tanaka, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga

Proc. of 2024 IEEE 21th Consumer Communications & Networking Conference (CCNC 2024) ( IEEE ) 1132 - 1133 2024.01

Language：English Publishing type：Research paper (international conference proceedings)

USA Las Vegas, NV 2024.01.06 - 2024.01.09

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 Reviewed International journal

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 ) 2023.11

Complementary Data Diffusion Method for Quick Retention of Large Spatio-Temporal Data Reviewed International journal

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 ) 2023.11

Dynamic Radio Resource Allocation Scheme for the B5G Mobile Systems Evaluated on the B5G/IoT Testbed with High Reliability and High Elasticity Reviewed International journal

Fumihide Kojima, Renri Nakano, Takeshi Ikenaga

Proc. of the 2023 26th International Symposium on Wireless Personal Multimedia Communications (WPMC2023) 2023.11

Fairness Improvement Method Using ECNs with Different Congestion Control Algorithms within QUIC Reviewed International journal

Nobuhiro Uchida, Daiki Nobayashi, Dirceu Cavendish, Takeshi Ikenaga

Proc. of the 31th International Conference on Network Protocols (ICNP 2023) ( IEEE ) 2023.10

Language：English Publishing type：Research paper (international conference proceedings)

Iceland Reykjavik 2023.10.10 - 2024.10.13

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

Other Link： 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 Reviewed International journal

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

Proc. of the 2023 IEEE 47th Annual Computers, Software, and Applications Conference (COMPSAC) ( IEEE ) 2023.06

Improvement of TCP Performance based on Characteristics of Private LoRa Interface Reviewed International journal

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 ) 2023.06

BBR Performance over Variable Delay Paths on Multipath TCP Video Streaming Reviewed International journal

Masayoshi Kondo, Dirceu Cavendish, Daiki Nobayashi, Takeshi Ikenaga

Proc. of the Fifteenth International Conference on Evolving Internet (INTERNET 2023) ( IARIA ) 18 - 23 2023.03

Complementary Data Transmission Control with Collision Avoidance for Efficient Retention of Large-size Spatio-Temporal Data Reviewed International journal

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 2023.01

Language：English Publishing type：Research paper (international conference proceedings)

USA Las Vegas, NV 2023.01.08 - 2023.01.11

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

Other Link： 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 Reviewed International journal

Nobuhiro Uchida, Daiki Nobayashi, Takeshi Ikenaga, Dirceu Cavendish

Proc. of 2023 IEEE 20th Consumer Communications & Networking Conference (CCNC 2023) ( IEEE ) 2023-January 714 - 715 2023.01

Language：English Publishing type：Research paper (international conference proceedings)

USA Las Vegas, NV 2023.01.08 - 2023.01.11

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

Other Link： 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 Reviewed International journal

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 2023.01

Language：English Publishing type：Research paper (international conference proceedings)

USA Las Vegas, NV 2023.01.08 - 2023.01.11

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

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85150622344&origin=inward

Study of Ultrasonic Data Collection System for Anomaly Detection on Mechanical Equipment Reviewed International journal

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

Proc. of the 2022 International Conference on Computational Science & Computational Intelligence (CSCI 2022) ( IEEE ) 2022.12

Unknown Malicious Domain Detection Based on DNS Query Analysis using Word2Vec Reviewed International journal

Hiroto Yamada, Daiki Nobayashi, Akihiro Sato, Yutaka Nakamura, Takeshi Ikenaga

Proc. of the 2022 International Conference on Computational Science & Computational Intelligence (CSCI 2022) ( IEEE ) 2022.12

Collision Avoidance Method for Broadcast Communication over Multi-hop HD-PLC Network Reviewed International journal

Yuki Furuhama, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga

Proc. of the 2022 International Conference on Computational Science & Computational Intelligence (CSCI 2022) ( IEEE ) 2022.12

Integrated Artificial Intelligence Technology for Mobility Load Balancing and Coverage Optimization Reviewed International journal

Yi-We Ma, Chun-Yao Chang, Yi-Hao Tu, Jiann-Liang Chen, Kazuya Tsukamoto, Masahiro Shibata, Daiki Nobayashi, Takeshi Ikenaga

Proc. of the 10th International Symposium on Applied Engineering and Sciences (2022) 2022.12

Spatio-temporal Data Retention System for Floating Cyber Physical System Reviewed International journal

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

Proc. of the 10th International Symposium on Applied Engineering and Sciences (2022) 2022.12

Implementation and Performance Evaluation of TCP/IP Communication over Private LoRa Reviewed International journal

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

Proc. of the 30th International Conference on Network Protocols (ICNP 2022) ( IEEE ) 2022.11

Language：English Publishing type：Research paper (international conference proceedings)

USA Lexington, KY 2022.10.30 - 2022.11.02

Low-power wide-area (LPWA) is a major communication technology used in the Internet of Things (IoT). However, since LPWA does not conform to the TCP/IP protocol stack and employs its own unique protocol, it is difficult for sensors equipped with LPWA I/F to connect to the Internet directly. In the present study, to realize general TCP/IP communication on LPWA networks, we construct a TCP/IP network over Private LoRa, and evaluate its communication performance. Moreover, we verify the feasibility of TCP/IP communication over LoRa by using a popular Internet application.

DOI： 10.1109/ICNP55882.2022.9940334

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85142704148&origin=inward

Adaptive Data Transmission Control for Spatio-temporal Data Retention over Crowds of Vehicles Reviewed International journal

Daiki Nobayashi, Ichiro Goto, Hiroki Teshiba, Kazuya Tsukamoto, Takeshi Ikenaga, Mario Gerla

IEEE Transactions on Mobile Computing ( IEEE ) 21 ( 11 ) 3822 - 3835 2022.11

Language：English Publishing type：Research paper (scientific journal)

Some specific services for Internet of Things, such as real-time map and providing local weather information, depend strongly on geographical time and location. We refer to the data for such service as spatio-temporal data (STD). When STD is used in a query response system similar to conventional Internet services, users not only need to acquire data actively as required, they must also have functions for retrieving data available STD. Therefore, we propose an STD retention system that uses vehicles as information hubs (InfoHubs) for disseminating and retaining the data in a specific area. In our system, InfoHubs diffuse, maintain, and advertise STD over places and times where the STD are strongly dependent, thereby allowing users to receive such data passively within the specific area. Additionally, because STD are associated with a particular space, the system can reduce search costs. We also propose an adaptive transmission control method that each vehicle effectively operates its wireless resources autonomously and STD are retained and distributed efficiently. Finally, we evaluated our proposed method using simulations and clarified that our proposed system is capable of achieving a coverage rate of nearly 100% for STD while reducing the number of data transmissions compared to existing systems.

DOI： 10.1109/TMC.2021.3066438

Kyutacar

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85103149527&origin=inward

Location-Based Autonomous Transmission Control Method for Spatio-Temporal Data Retention System Reviewed International journal

Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Myung Lee

Advances on Broad-Band Wireless Computing, Communication and Applications. BWCCA 2022. Lecture Notes in Networks and Systems. ( Springer ) 570 2022.10

Language：English Publishing type：Research paper (international conference proceedings)

Albania Tirana 2022.10.27 - 2022.10.29

With the development and spread of IoT technology, various devices have been connected to networks. Some data generated from IoT devices depends on geographical location and time (Spatio-Temporal Data). The realization of an architecture for "local production and consumption of STDs" can contribute to location-dependent applications, and therefore we have proposed the STD retention system with vehicles. In our previous study, the vehicle controlled the data transmission probability according to the density of the neighboring vehicles in order to reduce the data transmissions. However, since this method requires all vehicles to transmit beacons, it suffers from the excessive beacon collision when the vehicle density becomes high. In this paper, we propose a data transmission control method that realizes STD retention without transmitting beacons. Our simulation results using Luxembourg model demonstrates that the proposed method can achieve high coverage rate while decreasing the number of data transmissions compared with the existing transmission method based on transmission probability control in real environments.

DOI： 10.1007/978-3-031-20029-8_22

Kyutacar

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85141705855&origin=inward

Evaluation of MPTCP with BBR Performance on Wi-Fi/Cellular networks for Video Streaming Reviewed International journal

Masayoshi Kondo, Dirceu Cavendish, Daiki Nobayashi, Takeshi Ikenaga

Proc. of the Fourteenth International Conference on Evolving Internet (INTERNET 2022) ( IARIA ) 6 - 11 2022.05

Effective Data-Sharing Method for Multiple ICR Management in Autonomous Distributed Control Systems Reviewed International journal

Takaaki Kawano, Daiki Nobayashi, Takeshi Ikenaga

Proc. of the 5th International Conference on Innovative Computing and Communication (ICICC 2022) 2022.02

Data Completeness-aware Transmission Control for Large Spatio-Temporal Data Retention Reviewed International journal

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

Proc. of the 2022 IEEE International Conference on Consumer Electronics (ICCE 2022) 2022.01

Development of Wireless Communication System for Reliable Acoustic Data Collection Toward Anomaly Detection on Mechanical Equipment Reviewed International journal

Chinari Takano, Shinya Fujino, Daiki Nobayashi, Kazuya Tsukamoto, Mitsunori Mizumachi, Takeshi Ikenaga

Proc. of the 2021 International Conference on Computational Science and Computational Intelligence (CSCI 2021) 2021.12

Path Schedulers Performance on Cellular/Wi-Fi Multipath Video Streaming Reviewed International journal

Masayoshi Kondo, Dirceu Cavendish, Daiki Nobayashi, Takeshi Ikenaga

Proc. of the Thirteenth International Conference on Evolving Internet (INTERNET 2021) ( IARIA ) 10 - 15 2021.07

Efficient Data Diffusion and Elimination Control Method for Spatio-Temporal Data Retention System Reviewed International journal

Shumpei Yamasaki, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Myung J. Lee

IEICE Transactions on Communications ( The Institute of Electronics, Information and Communication Engineers ) E104-B ( 7 ) 2021.07

An Approach for Identifying Malicious Domain Names Generated by Dictionary-Based DGA Bots Reviewed International journal

Akihiro Satoh, Yutaka Nakamura, Yutaka Fukuda, Daiki Nobayashi, Takeshi Ikenaga

IEICE Transactions on Information and Systems ( The Institute of Electronics, Information and Communication Engineers ) E104-D ( 5 ) 2021.05

Transmission Control Method for Data Retention Taking into Account the Low Vehicle Density Environments Reviewed International journal

Ichiro Goto, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Myung Lee

IEICE Transactions on Information and Systems ( The Institute of Electronics, Information and Communication Engineers ) E104-D ( 4 ) 2021.04

Geolocation-centric Information Platform for Resilient Spatio-temporal Content Management Invited Reviewed International journal

Kazuya Tsukamoto, Hitomi Tamura, Yuzo Taenaka, Daiki Nobayashi, Hiroshi Yamamoto, Takeshi Ikenaga, Myung Lee

IEICE Transactions on Communications ( The Institute of Electronics, Information and Communication Engineers ) E104-B ( 3 ) 199 - 209 2021.03

Language：English Publishing type：Research paper (scientific journal)

In IoT era, the growth of data variety is driven by cross-domain data fusion. In this paper, we advocate that “local production for local consumption (LPLC) paradigm" can be an innovative approach in cross-domain data fusion, and propose a new framework, geolocation-centric information platform (GCIP) that can produce and deliver diverse spatio-temporal content (STC). In the GCIP, (1) infrastructure-based geographic hierarchy edge network and (2) adhoc-based STC retention system are interplayed to provide both of geolocation-awareness and resiliency. Then, we discussed the concepts and the technical challenges of the GCIP. Finally, we implemented a proof-of-concepts of GCIP and demonstrated its efficacy through practical experiments on campus IPv6 network and simulation experiments.

DOI： 10.1587/transcom.2020NVI0003

Kyutacar

Development of Data Collection Platform for Running Cars by using 920MHz LoRa Communication in Urban Area Reviewed International journal

Yasufumi Niwa, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga

Proc. of the 2020 International Conference on Emerging Technologies for Communications (ICETC 2020) ( Institute of Electronics, Information and Communication Engineers ) 2020.12

Development of Vehicle Management System using Location Data Collected by 920MHz LoRa Reviewed International journal

Daiki Nobayashi, Yasufumi Niwa, Kazuya Tsukamoto, Takeshi Ikenaga

Proc. of the 2020 International Conference on Computational Science and Computational Intelligence (CSCI 2020) 2020.12

Adaptive Server and Path Switching for Content Delivery Networks Reviewed International journal

Hiroyuki Nishimuta, Daiki Nobayashi, Takeshi Ikenaga

IEICE Transactions on Information and Systems ( Institute of Electronics, Information and Communication Engineers ) E103.D ( 11 ) 2389 - 2393 2020.11

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

The communications quality of content delivery networks (CDNs), which are geographically distributed networks that have been optimized for content delivery, deteriorates when interflow congestion conditions are severe. Herein, we propose an adaptive server and path switching scheme that is based on the estimated acquisition throughput of each path. We also provide simulation results that show our proposed method can provide higher throughput performance levels than existing methods.

DOI： 10.1587/transinf.2020EDL8045

Kyutacar

Handoff Characterization of Multipath Video Streaming Reviewed International journal

Kazuya Fujiwara, Shinichi Nagayama, Dirceu Cavendish, Daiki Nobayashi, Takeshi Ikenaga

Proc. of the Twelfth International Conference on Evolving Internet (INTERNET 2020) 17 - 22 2020.10

Beacon-less Autonomous Transmission Control Method for Spatio-Temporal Data Retention Reviewed International journal

Ichiro Goto, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Myung Lee

Proc. of the Advances in Intelligent Networking and Collaborative Systems (INCoS 2020) ( Springer ) 503 - 513 AISC, volume 1263 2020.08

Language：English Publishing type：Research paper (international conference proceedings)

Canada Victoria 2020.08.31 - 2020.09.02

With the development and spread of Internet of Things (IoT) technology, the number of devices connected to the Internet is increasing, and various kinds of data are now being generated from IoT devices. Some data generated from IoT devices depends on geographical location and time. We refer to such data as spatio-temporal data (STD). Since the “local production and consumption" of STD is effective for location-dependent applications, we have proposed a STD retention system using vehicles equipped with storage modules, computing resources, and short-range wireless communication equipment. In this previous system, each vehicle controls the data transmission probability based on the neighboring vehicle density in order to achieve effective data retention. However, since the overhead of beacon messages required for estimation of the neighboring vehicle density becomes a critical problem with the increase in the number of vehicles, thereby preventing the effective data retention. In this paper, we propose a new data transmission control method to realize effective and reliable STD retention without beacon. Simulation results showed that our proposed scheme can achieve effective data retention.

DOI： 10.1007/978-3-030-57796-4_48

Kyutacar

Application of 5G mobile communication system to the manufacturing industry Invited

Takeshi Ikenaga, Takeshi Nishida

The Journal of the Institute of Image Information and Television Engineers ( The Institute of Image Information and Television Engineers ) 74 ( 3 ) 441 - 446 2020.05

Application of 5th Generation Mobile Communication System to Industrial Robot Control Reviewed International journal

Atsuki Yokota, Sora Honda, Kei Yamafuku, Takeshi Nishida, Takeshi Ikenaga, Naoki Mori, Akira Matsunaga, Kakeru Maruyama, Kyohiro Yoshida, Shintaro Osada

IEEJ Transactions on Industry Applications ( The Institute of Electrical Engineers of Japan ) 140 ( 4 ) 314 - 326 2020.04

Language：Japanese Publishing type：Research paper (scientific journal)

This paper presents the results of verification tests for the application of a 5th generation mobile communication system (5G) to an industrial robot control system, consisting of an industrial robot, a three-dimensional measurement sensor, and a robot controller. First, the configuration of the industrial robot control system to be used for testing was examined. Second, the 5G radio characteristics at two factories were measured. The radio interference to/from devices in operation in the factories and the human shield effect influencing the radio characteristics were also examined in these measurements. In factory automation, it is generally inevitable to spend a long time rearranging the components of the industrial robot control system. From the test results, it was confirmed that the time required could be greatly reduced by replacing wired communication lines with 5G capable systems.

DOI： 10.1541/ieejias.140.314

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IEEE Globecom2002 1460 - 1464 2002.11

QoS Routing Algorithm based on Multi-Classes Traffic Load Reviewed

Hedia Kochkar,Takeshi Ikenaga,Yuji Oie

IEICE Transactions on Information and Systems E85-D ( 8 ) 1219 - 1225 2002.08

Quality of Assured Service through Multiple DiffServ Domains Reviewed

Kazumi Kumazoe (TAO),Yoshiaki Hori (Kyushu Inst. of Design),Takeshi Ikenaga,Yuji Oie

IEICE Transactions on Information and Systems E85-D ( 8 ) 1226 - 1232 2002.08

Performance Evaluation of TCP under Dynamic Allocation Scheme for Down Link Transmission Rate in W-CDMA Systems Reviewed

Yutaka Fukuda,Hiroyuki Koga,Takeshi Ikenaga,Yuji Oie

SPIE Conference of Emerging Technologies for Future Generation Wireless Communications 125 - 136 2002.07

Performance Evaluation of Channel Switching Scheme for Packet Data Transmission in Radio Network Controller Reviewed

Yoshiaki Ohta,Kenji Kawahara,Takeshi Ikenaga,Yuji Oie

IFIP-TC6 Networking 2002, LNCS2345 (Springer) 648 - 659 2002.05

Performance Analysis of Queue Length Distribution of Tandem Routers for QoS Measurement Reviewed

Nobuo Ryoki,Kenji Kawahara,Takeshi Ikenaga,Yuji Oie

Proc. of 2002 Symposium on Applications and the Internet (SAINT) Workshops 82 - 87 2002.02

Queue Management of RIO to Achieve High Throughput and Low Delay Reviewed

Yoshiaki Hori,Takeshi Ikenaga,Yuji Oie

IEICE Transactions on Communications E85-B ( 1 ) 63 - 69 2002.01

QoS Routing Algorithm based on Multi-Classes Traffic Load Reviewed

Hedia Kochkar,Takeshi Ikenaga,Yuji Oie

Proc. of IEEE GLOBECOM 2001 2193 - 2198 2001.11

Queue Management of RIO to Achieve High Throughput and Low Delay Reviewed

Yoshiaki Hori (Kyushu Institute of Design),Takeshi Ikenaga,Yuji Oie

Proc. of IEEE PACRIM2001 619 - 622 2001.08

Quality of Assured Service through Multiple DiffServ Domains Reviewed

Kazumi Kumazoe (TAO),Yoshiaki Hori (Kyushu Institute of Design),Takeshi Ikenaga,Yuji Oie

Proc. of IEEE PACRIM2001 83 - 86 2001.08

A Novel Buffer Management Scheme to Moderate Negative Effects Between TCP and UDP Reviewed

Yoshiaki Hori (Kyushu Institute of Design),Kenji Yamane,Takeshi Ikenaga,Yuji Oie

Quality of Service over Next-Generation Data Networks, Proc. of SPIE Vol.4524(2001) 194 - 202 2001.08

Server Based Inter-Domain QoS Routing: Cost Evaluation and Decision Enforcement Reviewed

Manzoor Hashmani (ENICOM),Koichi Tajima (ENICOM),Junichiro Sueishi (ENICOM),Mikio Yoshida (ENICOM),Takeshi Ikenaga,Yuji Oie

Proc. of SSGRR 2001 2001.08

Management and Realization of SLA for Providing Network QoS Reviewed

Manzoor Hashmani (ENICOM),Mikio Yoshida (ENICOM),Takeshi Ikenaga,Yuji Oie

Proc. of IEEE ICN'01 398 - 408 2001.07

Effectiveness and Issues of Rerouting Algorithms for QoS Networks Reviewed

Takeshi Ikenaga,Kenji Kawahara,Yuji Oie

IEICE Transactions on Communications E84-B ( 6 ) 1553 - 1560 2001.06

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Papers - IKENAGA Takeshi