Explanipedia

Optimization of Probabilistic Constellation Shaping for Optical OFDM Systems with Clipping Distortion Open

Thanh V. Pham, Susumu Ishihara · 2025

Optical orthogonal frequency-division multiplexing (OFDM) and probabilistic constellation shaping (PCS) have emerged as powerful techniques to enhance the performance of optical wireless communications (OWC) systems. While PCS improves spe…

Interaction between Evacuation Behavior and Information Dissemination Through Delay/Disruption Tolerant Network and Face-to-Face Communication in Disaster Scenarios Open

Hikaru Naito, Mineo Takai, Susumu Ishihara · 2025

Practical Design of Probabilistic Constellation Shaping for Physical Layer Security in Visible Light Communications Open

Thanh V. Pham, Susumu Ishihara · 2024

This paper studies a practical design of probabilistic constellation shaping (PCS) for physical layer security in visible light communications (VLC). In particular, we consider a wiretap VLC channel employing a probabilistically shaped $M$…

Design of Energy-Efficient Artificial Noise for Physical Layer Security in Visible Light Communications Open

Thanh V. Pham, Anh T. Pham, Susumu Ishihara · 2023

This paper studies the design of energy-efficient artificial noise (AN) schemes in the context of physical layer security in visible light communications (VLC). Two different transmission schemes termed $\textit{selective AN-aided single-i…

A placement method of ground stations for optical satellite communications considering cloud attenuation Open

Thanh V. Pham, Hiroya Yamano, Susumu Ishihara · 2023

This letter studies a placement method of optical ground stations (OGSs) to realize site diversity in optical satellite-to-ground communications under cloud attenuation. Using a meteorological ERA-Interim database, the monthly average clou…

PERVEHICLE 2023: Fifth International Workshop on Pervasive Computing for Vehicular Systems - Welcome and Committees Welcome Message Open

Hiroshi Shigeno, Hirozumi Yamaguchi, Susumu Ishihara, Yanqiu Huang · 2023

The Fifth International Workshop on Pervasive Computing for Vehicular Systems (PerVehicle 2023) aims to provide researchers and practitioners a forum for presenting and discussing research challenges on pervasive and mobile computing techn…

On the Design of Artificial Noise for Physical Layer Security in Visible Light Communication Channels with Clipping Open

Thanh V. Pham, Steve Hranilovic, Susumu Ishihara · 2023

Though visible light communication (VLC) systems are contained to a given room, improving their security is an important criterion in any practical deployment. In this paper, the design of artificial noise (AN) to enhance physical layer se…

Design and Implementation of a Video-Frame Localization System for a Drifting Camera-Based Sewer Inspection System Open

Yusuke Chikamoto, Yuki Tsutsumi, Hiroaki Sawano, Susumu Ishihara · 2023

To reduce the cost of inspecting old sewer pipes, we have been developing a low-cost sewer inspection system that uses drifting wireless cameras to record videos of the interior of a sewer pipe while drifting. The video’s data are transmit…

Communication Method Using Cellular and D2D Communication for Reverse Auction-Based Mobile Crowdsensing Open

Tetsushi Matsuda, Toru Inada, Susumu Ishihara · 2022

The demand for services that provide current sensing data (data) obtained at a specified location is expected to grow in the future. To realize such services with lower sensor installation and operation costs, we consider the use of a pull…

Design of Artificial Noise for Physical Layer Security in Visible Light Systems with Clipping Open

Thanh V. Pham, Steve Hranilovic, Susumu Ishihara · 2022

Though visible light communication (VLC) systems are contained to a given room, ensuring their security amongst users in a room is essential. In this paper, the design of artificial noise (AN) to enhance physical layer security in VLC syst…

Safe, Smooth, and Fair Rule-Based Cooperative Lane Change Control for Sudden Obstacle Avoidance on a Multi-Lane Road Open

Shinka Asano, Susumu Ishihara · 2022

When an unexpected obstacle occupies some of the lanes on a multi-lane highway, connected vehicles (CVs) may be able to avoid it cooperatively. For example, a CV that detects the obstacle first can immediately notify the following vehicles…

On Interactions between Evacuation Behavior and Information Dissemination via Heterogeneous DTN Open

Yudai Yahara, Arata Kato, Mineo Takai, Susumu Ishihara · 2022

Disaster information-sharing among emergency personnel and residents helps facilitate quick and safe evacuation from disaster areas. However, it is difficult to communicate with people in disaster areas when communications infrastructure i…

Congestion Control Algorithms for Collective Perception in Vehicular Networks Open

Susumu Ishihara, Kaito Furukawa, Haruka Kikuchi · 2022

By exchanging information on objects on the road detected by in-vehicle sensors through inter-vehicle communication, vehicles can detect objects that cannot be detected directly by their own sensors. This enables the connected vehicles (CV…

Guest editorial: IoT sensing, applications, and technologies for smart sustainable cities Open

Gerhard P. Hancke, Mohammad Reza Salehizadeh, Xuan Liu, Jie Hu, Adnan M. Abu‐Mahfouz , et al. · 2021

Sensing applications and Internet of Things (IoT) are indispensable for the construction of smart cities and provision of improved public services. Sensors act as the nerves of a smart city, enabling the collection of information that prov…

Point Cloud Video Streaming: Challenges and Solutions Open

Zhi Liu, Qiyue Li, Xianfu Chen, Celimuge Wu, Susumu Ishihara , et al. · 2021

Volumetric video (or hologram video), the medium for representing natural content in VR/AR/MR, is presumablythe next generation of video technology and a typical use case for 5G and beyond wireless communications. To realize volumetric vid…

Link Setup Time Reduction by FILS on IEEE 802.11-Based Inter-Vehicular Communications Open

Arata Kato, Taka Maeno, Yasunori Owada, Goshi Sato, Katsuhiro Temma , et al. · 2021

This paper reports the performance of link setup time reduction outlined by IEEE 802.11ai, which is also known as Fast Initial Link Setup (FILS), in real intermittent inter-vehicular communications. Fast link establishment is a significant…

Supplementary Material for: Prognostic Impact and Clinicopathological Features of Multiple Colorectal Cancers and Extracolorectal Malignancies: A Nationwide Retrospective Study Open

Kentaro Ochiai, Kazushige Kawai, Hioaki Nozawa, Kazuhito Sasaki, Manabu Kaneko , et al. · 2021

Introduction: Multiple primary malignancies (MPMs) are likely to develop in patients with colorectal cancer (CRC); however, their prognoses are unclear. This study aims to investigate the prognostic impacts and clinicopatholo…

FOREWORD Open

Susumu Ishihara · 2020

Point Cloud Video Streaming: Challenges and Solutions Open

Zhi Liu, Qiyue Li, Xianfu Chen, Celimuge Wu, Susumu Ishihara , et al. · 2020

Volumetric video (or hologram video), the medium for representing natural content in VR/AR/MR, is presumablythe next generation of video technology and a typical use case for 5G and beyond wireless communications. To realize volumetric vid…

Point Cloud Video Streaming in 5G Systems and Beyond: Challenges and Solutions Open

Zhi Liu, Qiyue Li, Xianfu Chen, Celimuge Wu, Susumu Ishihara , et al. · 2020

Volumetric media (or hologram video), the medium for representing natural content in VR/AR/MR, is presumably the next generation of video technology and a typical use case for 5G and beyond wireless communications. To realize volumetric me…

Fuzzy Logic-Based Adaptive Point Cloud Video Streaming Open

Zhi Liu, Jie Li, Xianfu Chen, Celimuge Wu, Susumu Ishihara , et al. · 2020

Point cloud video provides 6 degrees of freedom (6DoF) viewing experiences to allow users to freely select the viewing angles of 3D scenes and is expected to be the next-generation video. This paper studies the point cloud video streaming …

Fuzzy Logic-Based Adaptive Point Cloud Video Streaming Open

Zhi Liu, Jie Li, Xianfu Chen, Celimuge Wu, Susumu Ishihara , et al. · 2020

Point cloud video provides 6 degrees of freedom (6DoF) viewing experiences to allow users to freely select the viewing angles of 3D scenes and is expected to be the next-generation video. This paper studies the point cloud video streaming …

Bandwidth Control Method and Available Bandwidth Estimation Method for Aggregated Traffic Open

Tetsushi Matsuda, Susumu Ishihara · 2020

When multiple applications at two sites connected by a best-effort service network through gateway (GW) equipment communicate simultaneously, the receive rate of a high-priority application communication flow can be smaller than its necess…

Fuzzy Logic-Based Adaptive Point Cloud Video Streaming Open

Zhi Liu, Jie Li, Xianfu Chen, Celimuge Wu, Susumu Ishihara , et al. · 2020

Point cloud video provides 6 degrees of freedom (6DoF) viewing experiences to allow users to freely select the viewing angles of 3D scenes and is expected to be the next-generation video. This paper studies the point cloud video streaming …

Supplementary Material for: Loss of RUNX3 Immunoreactivity in Non-Neoplastic Rectal Mucosa May Predict the Occurrence of Ulcerative Colitis-Associated Colorectal Cancer Open

Takahide Shinagawa, Keisuke Hata, Tomomi Morikawa, Keigo Matsunaga, Shigenobu Emoto , et al. · 2019

Background/Aims: Runt-related transcription factor (RUNX) 3 is a tumor suppressor whose expression is reduced in non-neoplastic rectal mucosa of patients with ulcerative colitis (UC) with coexisting colitis-associated cancer …

Wireless Sewer Monitoring Research Open

Susumu Ishihara · 2018

EP-1554: Treatment outcomes and toxicities of IMRT for more than 1000 Japanese patients with prostate cancer Open

Hajime Tanaka, Masaya Ito, Taihei Yamaguchi, K. Esaki, M. Hayashi , et al. · 2018

Another View Point Image Generation with Shifted Perspective Using Two In-Vehicle Camera Images for Car Navigation System Based on Vehicular Ad-hoc Networks Open

Hirotoshi Ibe, Satoshi ISHIKAWA, Yuichi Kobayashi, Toru Kaneko, Susumu Ishihara , et al. · 2018

It is expected that telepresence techniques are introduced into a car navigation system. For example, the navigation system presents a road scene taken from different points of view to drivers. The realization of the system require cameras…

Data Uploading Control Method Based on Exchange of Metadata in VANET for On-demand Onboard Camera Picture Sharing System Open

Katsuya Matsumoto, Susumu Ishihara · 2018

Drivers can make driving plans and save traveling time if they can download real-time pictures taken at each driver's point of interest (POI).We designed a system that provides pictures taken by other drivers at a driver's POI.In one naive…

Data Exchange Strategies for Aggregating Geographical Distribution of Demands for Location-Dependent Information Using Soft-State Sketches in VANETs Open

Akihiro Yamada, Susumu Ishihara · 2017

When we drive a car, we often want to know the circumstances of roads between the current location and the destination.Ishihara et al. proposed a Vehicular ad-hoc NETworks (VANET) -based information sharing system, called the Real-Time Vis…

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