no code implementations • 1 Apr 2024 • Cheng Chen, Shoki Ohta, Takayuki Nishio, Mohamed Wahib
This study explores the feasibility of adapting CSI-guided imaging across varied environments.
1 code implementation • 23 Oct 2023 • Shoki Ohta, Takayuki Nishio
To mitigate these concerns, we introduce $\Lambda$-Split, a split computing framework to facilitate computational offloading while simultaneously fortifying data privacy against risks such as eavesdropping and unauthorized access.
no code implementations • 9 Aug 2023 • Kota Maejima, Takayuki Nishio, Asato Yamazaki, Yuko Hara-Azumi
In decentralized federated learning (DFL), substantial traffic from frequent inter-node communication and non-independent and identically distributed (non-IID) data challenges high-accuracy model acquisition.
no code implementations • 9 May 2023 • Cheng Chen, Shoki Ohta, Takayuki Nishio, Mehdi Bennis, Jihong Park, Mohamed Wahib
Introducing CSI-Inpainter, a pioneering approach for occlusion removal using Channel State Information (CSI) time sequences, this work propels the application of wireless signal processing into the realm of visual scene recovery.
no code implementations • 2 Jan 2023 • Shoki Ohta, Takayuki Nishio, Riichi Kudo, Kahoko Takahashi, Hisashi Nagata
The experimental results showed that our proposed method can predict future large attenuation of mmWave received signal strength and throughput induced by the LOS path blockage by pedestrians with comparable or superior accuracy to image-based prediction methods.
no code implementations • 30 Aug 2022 • Shoma Shimizu, Takayuki Nishio, Shota Saito, Yoichi Hirose, Chen Yen-Hsiu, Shinichi Shirakawa
This paper proposes a neural architecture search (NAS) method for split computing.
no code implementations • 3 Jun 2022 • Hiroki Shimomura, Yusuke Koda, Takamochi Kanda, Koji Yamamoto, Takayuki Nishio, Akihito Taya
In this study, we propose the use of camera images toward the accuracy enhancement of CSI recomposition from BFM.
no code implementations • 6 Mar 2022 • Ryusei Sugano, Ryoichi Shinkuma, Takayuki Nishio, Sohei Itahara, Narayan B. Mandayam
This paper presents the watch-from-sky framework, where multiple unmanned aerial vehicles (UAVs) play four roles, i. e., sensing, data forwarding, computing, and patrolling, for predictive police surveillance.
no code implementations • 17 Dec 2021 • Sohei Itahara, Takayuki Nishio, Yusuke Koda, Koji Yamamoto
However, generally, there is a communication system-level trade-off between communication latency and reliability; thus, to provide accurate DI results, a reliable and high-latency communication system is required to be adapted, which results in non-negligible end-to-end latency of the DI.
no code implementations • 29 Oct 2021 • Ryosuke Hanahara, Sohei Itahara, Kota Yamashita, Yusuke Koda, Akihito Taya, Takayuki Nishio, Koji Yamamoto
This indicates that WiFi sensing that leverages the BFM matrix is more practical to implement using the pre-installed APs.
no code implementations • 27 Oct 2021 • Sohei Itahara, Sota Kondo, Kota Yamashita, Takayuki Nishio, Koji Yamamoto, Yusuke Koda
Moreover, the evaluations performed in this study revealed that the BFF-based MUSIC achieved a comparable error of AoD estimation to the CSI-based MUSIC, while BFF is a highly compressed version of CSI in IEEE 802. 11ac/ax.
no code implementations • 28 Apr 2021 • Sohei Itahara, Takayuki Nishio, Koji Yamamoto
This study solves the problem of the incremental retransmission latency caused by packet loss in a lossy IoT network.
no code implementations • 1 Apr 2021 • Akihito Taya, Takayuki Nishio, Masahiro Morikura, Koji Yamamoto
Because FL algorithms hardly converge the parameters of machine learning (ML) models, this paper focuses on the convergence of ML models in function spaces.
no code implementations • 16 Feb 2021 • Masao Shinzaki, Yusuke Koda, Koji Yamamoto, Takayuki Nishio, Masahiro Morikura, Yushi Shirato, Daisei Uchida, Naoki Kita
Second, we demonstrate the feasibility of \textit{zero-shot adaptation} as a solution, where a learning agent adapts to environmental parameters unseen during training.
no code implementations • 13 Oct 2020 • Takayuki Nishio, Yusuke Koda, Jihong Park, Mehdi Bennis, Klaus Doppler
This article articulates the emerging paradigm, sitting at the confluence of computer vision and wireless communication, to enable beyond-5G/6G mission-critical applications (autonomous/remote-controlled vehicles, visuo-haptic VR, and other cyber-physical applications).
no code implementations • 29 Sep 2020 • Naoya Yoshida, Takayuki Nishio, Masahiro Morikura, Koji Yamamoto
This paper proposes a multi-armed bandit (MAB)-based client selection method to solve the exploration and exploitation trade-off and reduce the time consumption for FL in mobile networks.
Networking and Internet Architecture
no code implementations • 20 Sep 2020 • Takayuki Nishio, Ryoichi Shinkuma, Narayan B. Mandayam
Federated learning (FL) is an emerging technique used to train a machine-learning model collaboratively using the data and computation resource of the mobile devices without exposing privacy-sensitive user data.
no code implementations • 14 Aug 2020 • Sohei Itahara, Takayuki Nishio, Yusuke Koda, Masahiro Morikura, Koji Yamamoto
To this end, based on the idea of leveraging an unlabeled open dataset, we propose a distillation-based semi-supervised FL (DS-FL) algorithm that exchanges the outputs of local models among mobile devices, instead of model parameter exchange employed by the typical frameworks.
no code implementations • 21 Apr 2020 • Sohei Itahara, Takayuki Nishio, Masahiro Morikura, Koji Yamamoto
The key idea of the proposed method is to obtain a ``good'' subnetwork from the original NN using the unlabeled data based on the lottery hypothesis.
no code implementations • 14 Apr 2020 • Yusuke Koda, Koji Yamamoto, Takayuki Nishio, Masahiro Morikura
To this end, a differentially private AirComp-based FL is designed in this study, where the key idea is to harness receiver noise perturbation injected to aggregated global models inherently, thereby preventing the inference of clients' private data.
Networking and Internet Architecture Signal Processing
no code implementations • 17 May 2019 • Kota Nakashima, Shotaro Kamiya, Kazuki Ohtsu, Koji Yamamoto, Takayuki Nishio, Masahiro Morikura
In densely deployed WLANs, the number of the available topologies of APs is extremely high, and thus we extract the features of the topological structures based on GCNs.
no code implementations • 17 May 2019 • Naoya Yoshida, Takayuki Nishio, Masahiro Morikura, Koji Yamamoto, Ryo Yonetani
Therefore, to mitigate the degradation induced by non-IID data, we assume that a limited number (e. g., less than 1%) of clients allow their data to be uploaded to a server, and we propose a hybrid learning mechanism referred to as Hybrid-FL, wherein the server updates the model using the data gathered from the clients and aggregates the model with the models trained by clients.
1 code implementation • 23 Apr 2018 • Takayuki Nishio, Ryo Yonetani
Specifically, FedCS solves a client selection problem with resource constraints, which allows the server to aggregate as many client updates as possible and to accelerate performance improvement in ML models.