Faculty Profiles - NOBAYASHI Daiki

Papers - NOBAYASHI Daiki

Division display81 - 100 of about 108／ All the affair displays >>

Estimating the Randomness of Domain Names for DGA Bot Callbacks Reviewed

Akihiro Satoh, Yutaka Nakamura, Daiki Nobayashi, Takeshi Ikeanga,

IEEE Communications Letters 2018.04

Multipath TCP path schedulers for streaming video Reviewed

2017-January 1 - 6 2017.11

Performance Evaluation of 920 MHz band communication for underground infrastructure monitoring

Yuri Fujisaki, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga

Technical Report of IEICE 2017.10

VANET based Effective Data Transmission Control for Spatio-Temporal Data Retention System

Hiroki Teshiba, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga

Technical Report of IEICE 2017.10

Multipath TCP Packet Scheduling for Streaming Video Reviewed

Ryota Matsufuji, Dirceu Cavendish, Kazumi Kumazoe, Daiki Nobayashi, Takeshi Ikenaga

The Nineth International Conference on Evolving Internet (INTERNET 2017) 2017.07

Field tests and indoor emulation of Real-Spatial Information Based Group Communication Reviewed

Nagata A., Nakamura K., Fuji H., Nobayashi D., Tsukamoto K., Ikenaga T.

2017 IEEE International Conference on Pervasive Computing and Communications Workshops, PerCom Workshops 2017 66 - 67 2017.05

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

© 2017 IEEE. We proposed a novel scheme that combines information exchange and user social activities in real-time so that users can integrate their communications seamlessly with their daily lives. Called the Real-Spatial Information-Based Group Communication (r-Space) system, this scheme creates r-Space groups by considering personal and location information and enables users to share information within those groups. We developed a prototype system consisted of client application and control server and then conducted a field experiment in Nov. 2016. In PerCom 2017, the introduction of the experiment and its live demonstration will be exhibited.

DOI： 10.1109/PERCOMW.2017.7917524

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85019969814&origin=inward

Adaptive Data Transmission Control for Reliable and Efficient Spatio-Temporal Reviewed

Hiroki Teshiba, Daiki Nobayashi, Kazuya Tsukamoto, Takeshi Ikenaga

The Sixteenth International Conference on Networks (ICN2017) 2017.04

Reliable Data Delivery Scheme for Real-Spatial Information Based Group Communication Reviewed

Daiki Nobayashi, Masaya Mitsuishi, Takeshi Ikenaga, Akira Nagata, Katsuichi Nakamura

IEICE Communications Express 6 ( 6 ) 393 - 398 2017.03

Performance Characterization of Streaming Video over Multipath TCP Reviewed

Ryota Matsufuji, Dirceu Cavendish, Kazumi Kumazoe, Daiki Nobayashi, Takeshi Ikenaga, Yuji Oie

The Eighth International Conference on Evolving Internet (INTERNET 2016) 2016.11

Power Saving Scheme by Broadcast Proxy for ROD Wireless LAN Reviewed

Daiki Nobayashi, Yutaka Fukuda, Takeshi Ikenaga

IEICE Transactions on Communications J99-B ( 10 ) 908 - 910 2016.10

Regional infohubs by vehicles: Balancing spatio-temporal coverage and network load Reviewed

Higuchi T., Onishi R., Altintas O., Nobayashi D., Ikenaga T., Tsukamoto K.

IoV-VoI 2016 - Proceedings of the 1st MobiHoc International Workshop on Internet of Vehicles and Vehicles of Internet 25 - 30 2016.07

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

© 2016 ACM. The growing ubiquity of on-board wireless communication devices in vehicles is steadily opening up new possibilities of vehicular networks. In this paper, we design a framework to utilize radio-equipped cars as regional information hubs, which periodically disseminate public regional information (e.g., advertisements, travel tips, emergency info, etc.) over a designated geographical area in a city. The cars driving in the designated area repeatedly broadcast the data messages, allowing other drivers and pedestrians to passively obtain the information with their on-board wireless devices and/or smartphones. Although the idea follows a natural extension of the current capability of vehicular networks, vehicle densities in urban areas are typically highly non-uniform both in time and space, making it difficult to robustly disseminate data messages with minimal network load. We tackle this issue by introducing a probabilistic framework to intelligently adapt message dissemination strategy. Analyzing location broadcast messages, which are periodically exchanged among vehicles for safety applications, our protocol predicts future locations of neighboring radio-equipped vehicles and dynamically adjusts probability of message transmissions at each moment to suppress redundant network traffic. Simulation results show that our protocol can reduce the total amount of redundant message transmissions by up to 78%, while maintaining the spatio-temporal coverage of message dissemination.

DOI： 10.1145/2938681.2938688

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84979762833&origin=inward

Radio-on-Demand Networks for Green Wireless Networks Invited Reviewed

Takeshi Ikenaga, Hiryuki Yomo, Akira Hasegawa, Kenichi Abe, Daiki Nobayashi, Tetsuya Ito

IEICE Transactions on Communications J99-B ( 4 ) 261 - 274 2016.04

Adaptive contention window control scheme for dense IEEE802.11 wireless LANs Reviewed

Ito R., Nobayashi D., Ikenaga T.

IEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings 2015-November 326 - 331 2015.11

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

© 2015 IEEE. As portable information devices with a wireless local area network (LAN) interfaces, such as smartphones and tablet computers, become increasingly widespread, high station density and accompanying severe area throughput degradation are becoming more commonplace. One factor related to this situation is that the initial minimum contention windows size (CWmin) value in current Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) systems is set too low for the number of accessing stations. Because small CWmin values are unsuitable for high station densities, frame collisions become more commonplace and per-station communication performance decreases. In this paper, we assume that numerous stations are connected to a single access point (AP) and propose a media access control method for high station density network. In our proposed method, the AP periodically measures channel utilization and the number of stations that are transmitting frames to the AP, and then modifies the CWmin value based on these parameters. The AP then uses a beacon signal to inform the stations accessing the network of the new CWmin value. To verify the performance of our scheme, QualNet network simulations were performed, the results of which show us that, in terms of throughput, our proposed method outperforms conventional CSMA/CA schemes in wireless LAN environments with high station densities.

DOI： 10.1109/PACRIM.2015.7334856

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84958757333&origin=inward

Performance evaluation of multi-hop communication with a dynamic channel switching scheme in ROD-SAN Reviewed

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

IEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings 2015-November 332 - 337 2015.11

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

© 2015 IEEE. Wireless sensor and actuator networks (WSANs) are expected to be come fundamental technologies supporting machine-to-machine (M2M) communication and the internet of things (IoT). However, wireless sensors face inherent limitations because they must provide high demand response (DR) despite severely limited battery power. In an effort to achieve both power-saving characteristics in addition to high DR, we are working on research and development of radio-on-demand sensor and actuator networks (ROD-SANs), in which each node is equipped with a wake-up receiver that allows all nodes to stay in sleep mode most of the time, and transmit only after a wake-up signal is received. Since the wake-up signal can also include channel information, the sender nodes can direct the receiver nodes to switch communication channels when needed. However, as the number of nodes using the same channel increases, packet collisions occur more frequently, thereby degrading response performance. On the other hand, frequent channel switching inevitably increases channel switching delays. To simultaneously reduce both packet collisions and channel switching delays, we have extended the average-channel-utilization-based channel switching (ACS) scheme, discussed in our previous work on single-hop communication in a way that allows it to provide efficient performance in multi-hop communication. In this paper, based on simulations, we show how our scheme can improve the delivery ratio performance by approximately 20%.

DOI： 10.1109/PACRIM.2015.7334857

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84958757392&origin=inward

On Demand Routing Scheme for Real-Spatial Information based Group Communication Reviewed

Masaya Mitsuishi, Daiki Nobayashi, Takeshi Ikenaga, Yuji Oie, Hiroshi Ishinishi, Akira Nagata, Katsuichi Nakamura

Proc. on IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM) 2015 2015.08

Transmission Channel Switching Based on Channel Utilization in ROD-SAN Reviewed

Takeo Hidaka, Daiki Nobayashi, Yutaka Fukuda, Kazuya Tsukamoto, Takeshi Ikenaga

Future Network System and Security, Springer International Publishing 129 - 138 2015.06

A Self-adaptive Reliable Packet Transmission Scheme for Wireless Mesh Networks "jointly worked" Reviewed

Shi Wenze, Takeshi Ikenaga, Daiki Nobayashi, Xinchun Yin, and Hui Xu

Proc. of The 5th International Workshop on Wireless Networks and Multimedia (WNM-2014) 2014.08

Reliable Transmission with Multipath and Redundancy for Wireless Mesh Networks "jointly worked" Reviewed

Shi Wenze, Takeshi Ikenaga, Daiki Nobayashi, Xinchun Yin, and Hui Xu

Proc. of The 5th International Workshop on Wireless Networks and Multimedia (WNM-2014) 2014.08

Expiration Timer Control Method for QoS-aware Packet Chunking "jointly worked" Reviewed

Hiroki Yanaga, Daiki Nobayashi, Takeshi Ikenaga

Proc. of The 38th Annual International Computers, Software & Applications Conference 638 - 639 2014.07

Station Reassociation Scheme for Wireless Green Networking "jointly worked" Reviewed

Kazumi Kumazoe, Daiki Nobayashi, Yutaka Fukuda, Takeshi Ikenaga

Proc. of International Workshop on Wireless Networks and Energy Saving Techniques (WNTEST) 2014.06

　 PREV - NEXT 　

<NOBAYASHI Daiki>

Papers - NOBAYASHI Daiki