Faculty Profiles - NOBAYASHI Daiki

Papers - NOBAYASHI Daiki

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

Nobayashi D., Niwa Y., Tsukamoto K., Ikenaga T.

Proceedings - 2020 International Conference on Computational Science and Computational Intelligence, CSCI 2020 208 - 209 2020.12

Adaptive Server and Path Switching for Content Delivery Networks Reviewed

Nishimuta H., Nobayashi D., Ikenaga T.

IEICE Transactions on Information and Systems ( The Institute of Electronics, Information and Communication Engineers ) E103D ( 11 ) 2389 - 2393 2020.11

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

<p>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.</p>

DOI： 10.1587/TRANSINF.2020EDL8045

Scopus

CiNii Article

CiNii Research

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Handoff Characterization of Multipath Video Streaming Reviewed International journal

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

The Twelfth International Conference on Evolving Internet (INTERNET 2020) 2020.10

Station-centric Access Point Selection Method for Heterogeneous Wi-Fi Environment Reviewed International journal

2020.01

On-demand transmission interval control method for spatio-temporal data retention Reviewed

Yamasaki S., Nobayashi D., Tsukamoto K., Ikenaga T., Lee M.

Advances in Intelligent Systems and Computing 1035 319 - 330 2020.01

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

© Springer Nature Switzerland AG 2020. With the development and the spread of Internet of Things (IoT) technologies, various types of data are generated for IoT applications anywhere and anytime. We defined such data that depends heavily on generation time and location as Spatio-Temporal Data (STD). In the previous works, we have proposed the data retention system using vehicular networks to achieve the paradigm of “local production and consumption of STD.” The system can provide STDs quickly for users within a specific location by retaining the STD within the area. However, the system does not consider that each STD has different requirements for the data retention. In particular, the lifetime of the STD and the diffusion time to the whole area directly influence to the performance of data retention. Therefore, we propose a dynamic control of data transmission interval for the data retention system by considering the requirements. Through the simulation evaluation, we found that our proposed method can satisfy the requirements of STD and maintain a high coverage rate in the area.

DOI： 10.1007/978-3-030-29035-1_31

Scopus

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Transmission control method to realize efficient data retention in low vehicle density environments Reviewed International journal

Goto I., Nobayashi D., Tsukamoto K., Ikenaga T., Lee M.

Advances in Intelligent Systems and Computing 1035 2020.01

Path Switching Schedulers for MPTCP Streaming Video Reviewed

Nagayama S., Cavendish D., Nobayashi D., Ikenaga T.

2019 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, PACRIM 2019 - Proceedings 2019.08

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

© 2019 IEEE. Recent developments on multipath transport protocols have allowed video streaming transmissions over multiple interfaces, improving session reliability as well as bandwidth performance. One important aspect of multipath transport is the selection of paths on a packet by packet basis. In particular, path switching may cause head of line blocking effects that may impact video rendering. In this work, we analyze the impact of path switching on multipath video streaming, and propose new path schedulers aimed at reducing path switching. We utilize network performance measures, as well as video quality metrics, to characterize new schedulers' performance improvements and interactions between network and application layers of video streams for various network scenarios.

DOI： 10.1109/PACRIM47961.2019.8985114

Scopus

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Dynamic A-MPDU adaptation method for airtime fairness in channel bonding-ready WLANs Reviewed

Shimizu Y., Nobayashi D., Tamura H., Tsukamoto K.

2019 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, PACRIM 2019 - Proceedings 2019.08

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

© 2019 IEEE. Channel bonding is a technology to increase the transmission rate by bundling and using multiple continuous channels. However, the communication performance is likely to degrade frequently due to the channel competition caused by the rapid increase of the wireless LAN devices. Dynamic channel bonding is expected to become the mainstream in the future from the viewpoint of efficient channel utilization even under the severe competitive condition. However, since the implementation of the dynamic channel bonding to real PC and simulator is in the preliminary stage, the detailed performance investigation has not been carried out. None of existing studies examines the performance of the dynamic channel bonding at the frame level with CSMA/CA functions under the diverse channel competition condition. In this study, we first examine the performance of the dynamic channel bonding with CSMA/CA functions through theoretical approach (2 M/M/1/K) from the view point of frame level. In addition, we then implement the channel bonding mechanism into the Scenargie simulator and then verify its effectiveness through the comparison between simulation results and theoretical ones. Simulation results show that the dynamic channel bonding is suffering from the performance degradation due to the performance anomaly problem caused by the airtime unfairness, we thus propose a dynamic A-MPDU adaptation method. We showed that our proposed method can maximize throughput while achieving airtime fairness, irrespective of different patterns of channel competition.

DOI： 10.1109/PACRIM47961.2019.8985063

Scopus

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Conceptual experiment of geolocation-aware IoT data dissemination model Reviewed

Yuge K., Taenaka Y., Nobayashi D., Ikenaga T.

2019 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, PACRIM 2019 - Proceedings 2019.08

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

© 2019 IEEE. IoT devices are increasingly distributed around the world and have been digitizing physical things so far. However, a current IoT service is designed to be independent; it is not intended to conduct data collaboration with other IoT services. It must be important to be able to commonly use IoT data even from IoT devices managed for different services. To promote IoT data collaboration, we proposed a cross-domain data fusion platform on the basis of geographical proximity, called geocentric information platform (GCIP). Although GCIP enabled to collect and process data generated associated with geolocation of data generation, how to disseminate them should be still discussed. We can easily assume that some data summarization is preferable when data are used far away from the location of data generation. We also assume that there must be privacy and security issues in IoT data. That is why we propose a geolocation-aware IoT data dissemination model, which summarizes data due to the different distance between the location of the data source and the location of the destination. That is, as the distance becomes longer, the data is coarser. In this paper, we particularly focus on the behavior of the model and show the conceptual behavior by conducting experiments in a real environment.

DOI： 10.1109/PACRIM47961.2019.8985124

Scopus

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Adaptive Server and Path Switching Scheme for Content Delivery Network Reviewed

Nishimuta H., Nobayashi D., Ikenaga T.

2019 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, PACRIM 2019 - Proceedings 2019.08

Managing Path Switching in Multipath Video Streaming Reviewed International journal

Shinichi Nagayama, Dirceu Cavendish, Daiki Nobayashi, Takeshi Ikenaga

The Eleventh International Conference on Evolving Internet (INTERNET 2019), Jun. 2019. 2019.07

A dynamic channel switching for rod-san Reviewed

Nobayashi D., Fukuda Y., Tsukamoto K., Ikenaga T.

IEICE Transactions on Information and Systems ( The Institute of Electronics, Information and Communication Engineers ) E102D ( 5 ) 920 - 931 2019.05

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

<p>Wireless sensor and actuator networks (WSANs) are expected to become key technologies supporting machine-to-machine (M2M) communication in the Internet of things (IoT) era. However, sensors must be able to provide high demand response (DR) levels despite severely limited battery power. Therefore, as part of efforts to achieve a high DR, we are working on research and development related to radio-on-demand sensor and actuator networks (ROD-SANs). ROD-SAN nodes are equipped with wake-up receivers that allow all nodes to stay in sleep mode for a long period of time, and transmit only after the receiver receives a wake-up signal. In addition, sender nodes can direct the receiver nodes to switch communication channels because the wake-up signal also includes information on the channel to use for communication between each other. However, as the number of nodes utilizing the same channel increases, frequent packet collisions occur, thereby degrading response performance. To reduce packet collisions, we propose an own-channel-utilization based channel switching (OCS) scheme, which is a modification of the average-channel-utilization based switching (ACS) as our previous works. The OCS scheme decides whether or not to switch channels based on a probability value that considers not only average-channel utilization of nearby nodes but also own-channel utilization. This approach permits node switching to other channels by considering the overall utilization states of all channels. In this paper, based on simulations, we show that our scheme can improve the delivery ratio by approximately 15% rather than ACS scheme.</p>

DOI： 10.1587/transinf.2018NTP0007

Scopus

CiNii Article

CiNii Research

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Clustering malicious DNS queries for blacklist-based detection Reviewed

Satoh A., Nakamura Y., Nobayashi D., Sasai K., Kitagata G., Ikenaga T.

IEICE Transactions on Information and Systems E102D ( 7 ) 1404 - 1407 2019.01

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

Copyright © 2019 The Institute of Electronics, Information and Communication Engineers. Some of the most serious threats to network security involve malware. One common way to detect malware-infected machines in a network is by monitoring communications based on blacklists. However, such detection is problematic because (1) no blacklist is completely reliable, and (2) blacklists do not provide the sufficient evidence to allow administrators to determine the validity and accuracy of the detection results. In this paper, we propose a malicious DNS query clustering approach for blacklist-based detection. Unlike conventional classification, our cause-based classification can efficiently analyze malware communications, allowing infected machines in the network to be addressed swiftly.

DOI： 10.1587/transinf.2018EDL8211

Scopus

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Experimental performance evaluation of the collisions in lora communications Reviewed

Ishida Y., Nobayashi D., Ikenaga T.

Proceedings - 2018 International Conference on Computational Science and Computational Intelligence, CSCI 2018 1032 - 1035 2018.12

Path-selection method based on the available bandwidth of interfaces Reviewed

Ishida D., Nobayashi D., Ikenaga T.

Proceedings - 2018 International Conference on Computational Science and Computational Intelligence, CSCI 2018 815 - 818 2018.12

Autonomous Data Transmission Control Based on Node Density for Multiple Spatio-Temporal Data Retention Reviewed

Nobayashi D., Tsukamoto K., Ikenaga T.

Proceedings of the 2018 IEEE 7th International Conference on Cloud Networking, CloudNet 2018 2018.11

Experimental Investigation of Static Channel Bonding Performance in Competitive Environment

Kazuki Fujii, Hitomi Tamura, Daiki Nobayashi, Kazuya Tsukamoto

Technical Report of IEICE 2018.10

Estimating the Randomness of Domain Names for DGA Bot Callbacks Reviewed

Akihiro Satoh, Yutaka Nakamura, Daiki Nobayashi, Takeshi Ikeanga

IEEE Communication Letters 22 ( 7 ) 2018.07

Spatio-Temporal Data Retention System with MEC for Local Production and Consumption Reviewed

Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga, Mario Gerla

Proceedings - International Computer Software and Applications Conference 1 795 - 796 2018.06

TCP State Driven MPTCP Packet Scheduling for Streaming Video Reviewed

Ryota Matsufuji, Shinichi Nagayama, Dirceu Cavendish, Daiki Nobayashi, Takeshi Ikenaga

The Nineth International Conference on Evolving Internet (INTERNET 2018) 2018.06

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Papers - NOBAYASHI Daiki