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Dive into the research topics where Hiroki Nishiyama is active.

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Featured researches published by Hiroki Nishiyama.


international conference on communications | 2017

An efficient throughput-aware resource allocation technique for data transmission in unmanned aircraft systems

Yuichi Kawamoto; Hiroki Nishiyama; Nei Kato; Fumie Ono; Ryu Miura

Unmanned aircraft systems are expected to open pathways towards the development of many new services. Owing to their airborne flexible mobility, systems using unmanned aircraft (UA) have a significant potential to change our daily lives. However, several issues with such systems need to be addressed. In particular, wireless transmission of data such as high quality video from a UA to Ground Stations (GSs) is a major challenge affecting how airborne UAs are controlled. In this paper, we attempt to construct a base model of data transmission from UA to GSs in order to most efficiently use communication resources. To do this, we propose a method to allocate resources for individual UA missions that takes differences in requirements and surroundings into account. In this method, time division multiple access (TDMA)-based resource allocation is performed by anticipating the effective throughput according to the surrounding radio wave propagation environment. The effectiveness of this proposed resource allocation method is evaluated through simulation.


電子情報通信学会総合大会講演論文集 | 2015

BS-3-58 Resource-Efficient Data Placement for MapReduce in Wireless Data Center Networks(BS-3. Advanced Technologies in the Design, Management and Control for Future Innovative Communication Network)

Katsuya Suto; Hiroki Nishiyama; Nei Kato


Proceedings of the Society Conference of IEICE | 2015

TK-3-3 Challenges of Networks from the Perspective of IoT

Yuichi Kawamoto; Keisuke Sato; Hiroki Nishiyama; Nei Kato


Proceedings of the Society Conference of IEICE | 2015

B-3-7 A Study on Beam Pointing for LEO Site-diversity

Shigenori Tani; Shogo Tsuzaki; Katsuyuki Motoyoshi; Hiroyasu Sano; Atsushi Okamura; Hiroki Nishiyama; Nei Kato


電子情報通信学会総合大会講演論文集 | 2014

B-6-121 Improving User Throughput by Dynamically Selecting Gateway in FiWi Access Networks

Thuan Ngo; Hiroki Nishiyama; Nei Kato


電子情報通信学会総合大会講演論文集 | 2014

B-6-144 Towards Providing Fairness in PON-WMN based FiWi Networks

Panu Avakul; Hiroki Nishiyama; Nei Kato


Archive | 2011

Extending the Lifetime of Wireless Sensor Networks: AH ybrid Routing Algorithm

Ahmed E. A. A. Abdulla; Hiroki Nishiyama; Nei Kato


Archive | 2011

Load Balancing and QoS Provisioning Based on Congestion Prediction for GEO/LEO Hybrid Satellite Networks This paper describes a new load balancing and quality of service provisioning scheme for real-time and non-real-time traffic, based on a new congestion prediction scheme.

Hiroki Nishiyama; Daigo Kudoh; Nei Kato; Naoto Kadowaki


電子情報通信学会技術研究報告. NS, ネットワークシステム | 2010

On the effect of mobility on reliable topology control in ad-hoc networks (ネットワークシステム)

Ngo Duc Thuan; Hiroki Nishiyama; Nei Kato


Archive | 2010

VTC2010-Spring Accepted Paper List

Arash Tahmasebi Toyserkani; Mohammad Reza Khanzadi; Arne Svensson; Teck Aguilar; Mohamed Chedly Ghedira; Vincent Gauthier; Hossam Afifi; Chin-Liang Wang; Slim Zaidi; Keyvan Zarifi; Sofiène Affes; Ali Ghrayeb; Joan Sun; O. K. Li; Tao Ma; Michael Hempel; Dongming Peng; Hamid Sharif; Mohammad Masumuzzaman Bhuiyan; Iqbal Gondal; Joarder Kamruzzaman; Hiroki Nishiyama; Nei Kato; Abhijeet A. Bhorkar; Rizwan Ahmad; Fu-chun Zheng; Micheal Drieberg

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Fumie Ono

National Institute of Information and Communications Technology

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