研究者詳細 - 黒崎　正行

論文 - 黒崎　正行

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Experimental Evaluation of CNN-based Packet Detection to Ensure 5G and WiFi Networks Coexistence 査読有り国際誌

Muhammad Harry Bintang Pratama, Dody Ichwana Putra, Muhammad Taqiyuddin, Masayuki Kurosaki,Hiroshi Ochi

Proceeings - 9th International Forum on Advanced Technologies 2023年03月

Experimental Evaluation of Rate Adaptation using Deep-Q-Network in IEEE 802.11 WLAN 査読有り国際誌

Bintang Pratama M.H., Nakashima T., Nagao Y., Kurosaki M., Ochi H.

Proceedings - IEEE Consumer Communications and Networking Conference, CCNC 2023-January 668 - 669 2023年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Rate adaptation algorithm has an important role in the Wi-Fi network. It ensures that the nodes transmit at a suitable transmission rate with minimum packet errors on the receiving side. However, there are cases when the existing algorithms fail to adapt to the changes in the communication environment. In this paper, we propose a rate adaptation algorithm using a Deep Q-network (DQN), in which the DQN agent controls the transmission rate of a node in response to the communication environment. We also evaluate the proposed algorithm using the field-programmable gate array (FPGA) and software-defined radio (SDR). The experimental result shows that the proposed algorithm can adaptively select the suitable MCS and maintain the throughput.

DOI： 10.1109/CCNC51644.2023.10060609

Scopus

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A Study Real-Time WLAN Sensing System Using Channel State Information 査読有り国際誌

Isshiki R., Tsuji K., Nagao Y., Kurosaki M., Sai B., Ochi H.

Proceedings - IEEE Consumer Communications and Networking Conference, CCNC 2023-January 907 - 908 2023年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Recently, the Wi-Fi human activity recognition (HAR) system has attracted attention, using channel state information (CSI). CSI is a characteristic that indicates the radio propagation environment from transmitter to receiver, indoor environment. Therefore, sensing technology that predicts the indoor environment by calculating backward from the CSI is being considered. We first analyzed CSI in the time direction using singular value decomposition (SVD). In addition, a long short-term memory (LSTM) is applied to the obtained features to classify Absence/Presence. Furthermore, we implemented this system, where software-defined radio (SDR) receiver and common commercial wireless access point.

DOI： 10.1109/CCNC51644.2023.10060556

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85150629500&origin=inward

Multi-Task Learning with Convolutional Neural Network Approach for Packet Collision Avoidance in 802.11 WLAN 査読有り国際誌

Dody Ichwana Putra, Muhammad Harry Bintang Pratam, Tomoki Nakashima, Yuhei Nagao, Masayuki Kurosaki, Hiroshi Ochi

Proceeings - 2022 9th NAFOSTED Conference on Information and Computer Science 2022年10月

Multi - Task Learning with Convolutional Neural Network for Packet Format Detection and Modulation Classification of Wireless LAN 査読有り国際誌

Dody Ichwana Putra, Muhammad Harry Bintang Pratama, Yuhei Nagao, Masayuki Kurosaki, Hiroshi Ochi

Proceeings - 2022 13th International Conference on Information and Communication Technology Convergence 2022年10月

ns3-ai: Rate Control for Wireless LAN by Deep Q-Network 査読有り国際誌

Tomoki Nakashima, Leonardo Lanante, Muhammad Harry Bintang Pratama, Masayuki Kurosaki, Hiroshi Ochi

Proceedings - International Workshop on Smart Info-Media System in Asia 2022年09月

無線LAN規格IEEE802.11の次世代技術動向と応用査読有り

長尾勇平，黒崎正行，尾知博

映像情報メディア学会誌 ( 一般社団法人　映像情報メディア学会 ) 76 ( 3 ) 337 - 343 2022年05月

FOREWORD Special Section on Smart Multimedia & Communication Systems 査読有り国際誌

OCHI Hiroshi, KUROSAKI Masayuki

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences ( 一般社団法人電子情報通信学会 ) E105.A ( 4 ) 611 - 612 2022年04月

H.264 Scalable Video Coding Transmission on MIMO without CSI Feedback 査読有り

Tiawongsuwan Manthana, Lanante Leonardo, Kurosaki Masayuki, Ochi Hiroshi

信号処理 ( 信号処理学会 ) 26 ( 2 ) 39 - 49 2022年03月

記述言語：英語掲載種別：研究論文（学術雑誌）

<p>In order to meet the current transmission and QoS demands of wireless video transmission, the conventional wireless systems are using Multiple Input Multiple Output (MIMO) technology aided with receiver channel state information (CSI) feedback. The CSI is used by the access point to accurately measure the users' channel quality to decide the best transmission and video encoding parameters possible for each user. However, the CSI feedback has some disadvantages such as the delayed reception at the transmitter, the CSI expiry due to the doppler shift, and finally, hardware complexity making it difficult to be implemented in low power and low cost devices. In this paper, we propose the transmission of H.264/SVC video bitstreams through MIMO system by using the received signal strength indicator (RSSI) instead of CSI. To supplement the RSSI, we implement a look-up table based mechanism to predict the video PSNR for any wireless propagation environment. Aside from being widely supported in all wireless devices, the RSSI can be obtained from the clear to send (CTS) packets in without the need of a sounding process. The results show that our proposed method improves the PSNR by more than 16 dB, and has 6 meters more range compared with the conventional method with fixed encoding ratio and packetization.</p>

DOI： 10.2299/jsp.26.39

CiNii Article

CiNii Research

Hardware Design of Wireless Video Transmission Using JSCC 査読有り国際誌

Shohei Ochi, Masayuki Kurosaki, Hiroshi Ochi

9th International Joint Symposium on Applied Engineering and Sciences 2021年12月

Noise Reduction for Photon Counting Imaging Using Discrete Wavelet Transform 査読有り

Lee J., Kurosaki M., Cho M., Lee M.C.

Journal of Information and Communication Convergence Engineering 19 ( 4 ) 276 - 283 2021年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

In this paper, we propose an effective noise reduction method for photon counting imaging using a discrete wavelet transform. Conventional 2D photon counting imaging was used to visualize the object under dark conditions using statistical methods, such as the Poisson random process. The photons in the scene were estimated using a statistical method. However, photons which disturb the visualization and decrease the image quality may occur in the background where there is no object. Although median filters are used to reduce the noise, the noise in the scene remains. To remove the noise effectively, our proposed method uses the discrete wavelet transform, which removes the noise in the scene using a specific thresholding method that utilizes photon counting imaging characteristics. We conducted an optical experiment to demonstrate the denoising performance of the proposed method.

DOI： 10.6109/jicce.2021.19.4.276

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85124545994&origin=inward

A Study on the Quality Improvement Effects of Using STBC with H.264/SVC Video Transmission 査読有り国際誌

Tiawongsuwan M., Lanante L., Kurosaki M., Ochi H.

ISPACS 2021 - International Symposium on Intelligent Signal Processing and Communication Systems: 5G Dream to Reality, Proceeding 2021年11月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

H.264/SVC is a widely used compression standard with a very high lossy compression rate. The completeness of the H.264/SVC bitstream is very crucial in achieving high quality video decompression. This is especially true in regard to the base layer which contains the important coding data. In this paper, we improve the quality of H.264/SVC video transmission by using the Space Time Block Code (STBC) technique. STBC is a technique to increase the reliability of the wireless transmission by transmitting multiple copies of the signal along multiple transmit antennas and is thus suitable for the need of H.264/SVC. We compared STBC with conventional SISO and MIMO techniques using the IEEE 802.11ac standard. The simulation results show that our method which uses STBC has superior performance in terms of both of high PSNR and low BER.

DOI： 10.1109/ISPACS51563.2021.9651122

Scopus

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Industrial WLAN System with Accurate Time Synchronization on Software Defined Radio 査読有り

Nguyen T.T.T., Toyofuku M., Ito Y., Ishimitsu C., Nagao Y., Kurosaki M., Ochi H.

2021 IEEE International Conference on Communications Workshops, ICC Workshops 2021 - Proceedings 2021年06月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

This paper presents a hardware implementation of low latency and highly accurate time synchronization for Industrial WLAN systems. The design of our media access control (MAC) layer supports both asynchronous and synchronous multi- user transmission protocols. Low overhead Packet Division Multiple Access (PDMA) scheme is utilized for Multi-user Downlink transmission, while Frequency Division Multiple Access (FDMA) is employed for the uplink transmission. The design of the physical (PHY) layer system is developed based on fast and deterministic communication. The proposed industrial WLAN system is developed on Software Defined Radio (SDR). The experimental results show that the wireless control communication can be achieved to control motors with a high accuracy Precision Time Protocol (PTP) in nano-second level from 200 ns to 300 ns which is less than 1 ms compared to PROFINET wireless standard.

DOI： 10.1109/ICCWorkshops50388.2021.9473752

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85112804045&origin=inward

国際会議開催報告 2020 International Workshop on Smart Info-Media System in Asia 招待有り

黒崎正行, 尾知博

電子情報通信学会基礎・境界ソサイエティ Fundamentals Review 14 ( 4 ) 349 - 350 2021年04月

担当区分：筆頭著者記述言語：日本語掲載種別：研究論文（学術雑誌）

国際会議開催報告
2020 International Workshop on Smart Info-Media System in Asia
（SISA 2020，スマートインフォメディアシステム国際ワークショップ・イン・アジア，https://www.ieice-sisa.org/）Soongsil University, Seoul, Korea（Full Online）2020年12月17日～18日

DOI： essfr.14.4_349

Live demonstration: Null beamforming to self in cooperative MIMO for full-duplex system 査読有り

Kawano M., Nguyen T.T.T., Nagao Y., Lanante L., Kurosaki M., Ochi H.

Proceedings - IEEE International Symposium on Circuits and Systems 2021-May 2021年04月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

We demonstrate a self-interference (SI) cancellation in cooperative multiple-input multiple-output (Co-MIMO) for full-duplex (FD) wireless communication systems by applying the block diagonalization used in multi-user MIMO. The proposed method's implementation uses a field-programmable gate array (FPGA) and software-defined radio (SDR). In the experiment, a total of 33 [dB] SI can cancel with two cooperative APs and two antennas per AP in the IEEE 802.11 system.

DOI： 10.1109/ISCAS51556.2021.9401102

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85109023157&origin=inward

Null beamforming to self in cooperative MIMO for full-duplex systems 査読有り

Kawano M., Thao Nguyen T.T., Nagao Y., Lanante L., Kurosaki M., Ochi H.

Proceedings - IEEE International Symposium on Circuits and Systems 2021-May 2021年04月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

In this paper, we propose self-interference (SI) cancellation in cooperative multiple-input multiple-output (Co-MIMO) for full-duplex (FD) wireless communication systems. This proposal solves SI by applying the block diagonalization used in multi-user MIMO. Therefore, there is no need for a radio frequency (RF) canceller, which has a large hardware (HW) size and is difficult to extend to MIMO. Furthermore, we can achieve higher throughput by applying Co-MIMO, in which multiple access points (APs) work together to communicate. The proposed method-s implementation uses field-programmable gate array (FPGA) and software-defined radio (SDR). In the experiment, a total of 33 [dB] SI can cancel with two cooperative APs and two antennas per AP in the IEEE 802.11 system.

DOI： 10.1109/ISCAS51556.2021.9401490

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85109037957&origin=inward

Cooperative MIMO Applied Null Beamforming to Self in Full-Duplex Wireless Communication System and Its Implementation 査読有り国際誌

Kawano M., Nagao Y., Lanante L., Kurosaki M., Ochi H.

International Conference on Advanced Communication Technology, ICACT 2021-February 176 - 181 2021年02月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

This paper proposes a full-duplex wireless communication system applying cooperative multiple-input multiple-output (Co-MIMO). This proposal solves self-interference (SI) in full-duplex wireless communication systems by applying the block diagonalization used in multi-user MIMO (MU-MIMO). Therefore, there is no need for a radio frequency (RF) canceller, which has a large hardware size and is difficult to extend to MIMO. Furthermore, higher throughput can be achieved by applying Co-MIMO, in which multiple access points work together to communicate. We also introduce the implementation of the proposed method using a field-programmable gate array (FPGA) and software-defined radio (SDR) in this paper. It shows that SI cancellation can be realized by using them. The proposed method is implemented based on the IEEE 802.11n frame format as an example. In the experiment, a total of 30 [dB] SI cancellation is confirmed with a transmission power of-12 [dBm]. The SI cancellation amount can be further increased by increasing the transmission power.

DOI： 10.23919/ICACT51234.2021.9370380

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85102856419&origin=inward

Design of WLAN System for Industrial Communication 査読有り

Ito Y., Toyofuku M., Ishimitsu C., Nguyen T.T.T, Nagao Y., Lanante L., Kurosaki M., Ochi H.

International Workshop on Smart Info-Media System in Asia (SISA 2020) 2020年12月

Power Allocation Scheme for Wireless Video Streaming over Multiuser MIMO Systems 査読有り

Yoshikawa Y., Nagao Y., Kurosaki M., Ochi H.

International Workshop on Smart Info-Media System in Asia (SISA 2020) 2020年12月

Asymmetric Multi-BSS Environment Analytical Model for IEEE 802.11 Based WLANs 査読有り

Kajihara R., Wenkai H., Lanante L., Kurosaki M., Ochi H.

International Workshop on Smart Info-Media System in Asia (SISA 2020) 2020年12月

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