IEICE Communications Express最新文献_第2页

Antenna Association Switching and Received Signal Selection in Uplink for Distributed Antenna Systems 分布式天线系统上行链路中天线关联交换与接收信号选择

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IEICE Communications Express Pub Date : 2026-09-01 Epub Date: 2026-07-14 DOI: 10.23919/comex.2026XBL0086

Ayumu Takada;Yukitoshi Sanada

引用次数: 0

DSL Script Generation via Task Decomposition with LLMs 通过llm的任务分解生成DSL脚本

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IEICE Communications Express Pub Date : 2026-09-01 Epub Date: 2026-07-14 DOI: 10.23919/comex.2026XBL0074

Tatsuya Hirano;Hiroki Inoue;Takayuki Fujiwara

{"title":"DSL Script Generation via Task Decomposition with LLMs","authors":"Tatsuya Hirano;Hiroki Inoue;Takayuki Fujiwara","doi":"10.23919/comex.2026XBL0074","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0074","url":null,"abstract":"The functional disaggregation of optical transport equipment is underway to create optical transport networks that offer faster time-to-market and optimized performance. In parallel, multi-vendor environments are being increasingly adopted by network operators. Even in the resulting disaggregated environments, network control should remain unified. To satisfy this requirement, we are developing a controller that incorporates an adapter function to absorb differences in control commands across multi-vendor devices. The adapter internally maintains control scripts written in an intermediate language and abstracts vendor-specific commands to hide inter-vendor differences. This paper proposes a method in which a large language model (LLM) assists in generating control scripts written in a domain-specific language (DSL). Compared with baseline approaches, the proposed method reduced the number of syntax/formatting errors in control scripts by 50%. Furthermore, key technical findings extracted from an evaluation and analysis are summarized, and prospects for further advancement of the proposed method are discussed.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 9","pages":"379-383"},"PeriodicalIF":0.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11610665","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148862135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Verification of Low-Power Consumption Two-Node Cooperative Node Architecture for All-Optical Metro Networks 全光城域网络低功耗双节点协作节点架构的实验验证

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IEICE Communications Express Pub Date : 2026-08-01 Epub Date: 2026-06-02 DOI: 10.23919/comex.2026TCL0010

Satsuki Jimura;Takashi Miyamura;Satoru Okamoto;Takuma Izumi;Ryunosuke Sasaki;Masahiko Jinno;Naoaki Yamanaka

{"title":"Experimental Verification of Low-Power Consumption Two-Node Cooperative Node Architecture for All-Optical Metro Networks","authors":"Satsuki Jimura;Takashi Miyamura;Satoru Okamoto;Takuma Izumi;Ryunosuke Sasaki;Masahiko Jinno;Naoaki Yamanaka","doi":"10.23919/comex.2026TCL0010","DOIUrl":"https://doi.org/10.23919/comex.2026TCL0010","url":null,"abstract":"To achieve ultra-low latency and power efficiency, metro networks should support a wavelength-direct network by deploying all-photonics technologies. However, conventional reconfigurable optical add-drop multiplexers utilize wavelength selective switches (WSSs) and optical amplifiers to implement colorless, directionless, and contentionless functionality, increasing power consumption and cost. To address this, we previously proposed a two-node cooperative node architecture using low-power contention-based programmable WSSs with passive optical components. In this paper, we investigate the effectiveness and feasibility of the proposed architecture in terms of power-saving, blocking probability, and transmission characteristics. Simulation results demonstrate a 74.7% power reduction, equivalent blocking performance beyond 76 wavelengths, and an optical signal-to-noise ratio of 27.22 dB. We also conducted transmission experiments in a laboratory environment to verify the basic operation of the proposed architecture. We evaluated crosstalk and insertion loss and confirmed that the transmission performance was sufficient.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 8","pages":"317-321"},"PeriodicalIF":0.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11548524","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Routing Control Using Self-Organizing Map and Ant Colony Optimization in Information-Centric Networking 信息中心网络中基于自组织映射和蚁群优化的路由控制

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IEICE Communications Express Pub Date : 2026-08-01 Epub Date: 2026-06-02 DOI: 10.23919/comex.2026TCL0005

Rin Akabane;Takumi Senaha;Takuya Asaka

引用次数: 0

Hybrid Optimization of Contention Window Size and Transmission Probability for Dense Wireless LANs 密集无线局域网竞争窗口大小与传输概率的混合优化

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IEICE Communications Express Pub Date : 2026-08-01 Epub Date: 2026-04-14 DOI: 10.23919/comex.2026TCL0012

Ryota Yamada;Osamu Nakamura;Hiromichi Tomeba

{"title":"Hybrid Optimization of Contention Window Size and Transmission Probability for Dense Wireless LANs","authors":"Ryota Yamada;Osamu Nakamura;Hiromichi Tomeba","doi":"10.23919/comex.2026TCL0012","DOIUrl":"https://doi.org/10.23919/comex.2026TCL0012","url":null,"abstract":"In a dense network where numerous stations (STAs) are connected to a wireless network within a designated area, simultaneous data transmissions by multiple STAs frequently cause packet collisions, leading to reduced communication efficiency and increased transmission delays. In wireless local area network (LAN), which is utilized as a wireless network, carrier sense multiple access with collision avoidance (CSMA/CA) is used to avoid packet collisions. In CSMA/CA, a STA observes whether the channel is idle before transmission; if the channel is idle, it waits for a random duration based on the contention window (CW) before transmitting data. However, if multiple STAs select the same waiting time, they transmit simultaneously, resulting in packet collisions. To reduce the probability of packet collisions, it is effective to set a CW that is appropriate for the environment. Nevertheless, in dense networks, packet collisions cannot be avoided even when the CW is set to its maximum value. Therefore, this paper explores the application of <tex>$p$</tex>-persistent CSMA, which introduces a transmission probability, and investigates the optimal control of both CW and transmission probability for the environment. The effectiveness of this approach is demonstrated through computer simulations.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 8","pages":"309-312"},"PeriodicalIF":0.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11481630","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ghost Target Suppression by Time-Offset Simple Direction Estimation for Multi-Target Localization in Radar Network 基于时偏简单方向估计的雷达网络多目标定位鬼目标抑制

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IEICE Communications Express Pub Date : 2026-08-01 Epub Date: 2026-06-16 DOI: 10.23919/comex.2026XBL0057

Keita Usuda;Hiroyuki Hatano;Kosuke Sanada;Kazuo Mori

{"title":"Ghost Target Suppression by Time-Offset Simple Direction Estimation for Multi-Target Localization in Radar Network","authors":"Keita Usuda;Hiroyuki Hatano;Kosuke Sanada;Kazuo Mori","doi":"10.23919/comex.2026XBL0057","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0057","url":null,"abstract":"This letter focuses on a target position estimation using a radar network, which is one of the technologies for recognizing the surrounding environment of a vehicle. The radar network can estimate the target positions based on the ranges from multiple radars to each of targets and existence probability distributions of targets. The position estimation based on the existence probability distributions can be used in multiple-target situations. However, there is a problem of false estimation (ghost targets) at positions where targets do not exist. In this letter, we propose a novel position estimation algorithm employing the simple direction estimation to the targets, which suppresses the appearance of ghost targets. By intentionally offsetting the transmission timing of the two signals from two transmitters, the rough direction of the target is estimated. Then, the estimated direction is used to limit the range of the existence probability distribution. The effectiveness of the proposed method is evaluated by computer simulation.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 8","pages":"336-340"},"PeriodicalIF":0.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11568117","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum: Preamble-Free Display-Camera Communication Exploiting Rolling Shutter Effect and Zero-Sum Orthogonal Codes [IEICE Communications Express Vol. 15 (2026) No. 7 pp. 273-276] 勘误：利用滚动快门效应和零和正交码的无前导显示-相机通信[IEICE Communications Express Vol. 15 (2026) No. 7 pp. 273-276]

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IEICE Communications Express Pub Date : 2026-08-01 Epub Date: 2026-08-03 DOI: 10.23919/comex.2026XBL8001

引用次数: 0

Enhancing AoA-Based Localization Robustness Against AoA Outliers 增强基于AoA的定位鲁棒性

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IEICE Communications Express Pub Date : 2026-08-01 Epub Date: 2026-06-16 DOI: 10.23919/comex.2026XBL0081

Koularp Thongsavanh;Minseok Kim

{"title":"Enhancing AoA-Based Localization Robustness Against AoA Outliers","authors":"Koularp Thongsavanh;Minseok Kim","doi":"10.23919/comex.2026XBL0081","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0081","url":null,"abstract":"This paper presents a comparative evaluation of angle-of-arrival (AoA)–based localization methods using both measured data and simulation results. Several conventional and robust estimators, including least squares (LS), weighted least squares (WLS), weighted linearized least squares (WLLS), two-step error-variance least squares (TELS), and Outlier Sparsity-Promoting Linear Regression (OSPLR), are investigated. While conventional methods provide reasonable performance, they are highly sensitive to outliers caused by measurement errors under severe multipath conditions. Experimental results show that conventional methods achieve comparable accuracy under nominal conditions but suffer severe degradation in the presence of strong AoA outliers. To further interpret these observations, measurement-informed Monte Carlo simulations are conducted by incorporating realistic error statistics and controlled outlier patterns. The results confirm that increasing the number of sensors consistently improves localization accuracy and approaches the Cramér-Rao lower bound (CRLB). In contrast to existing approaches, OSPLR demonstrates superior robustness against severe outliers while maintaining competitive performance under outlier-free conditions. These findings highlight the effectiveness of sparsity-based outlier modeling for practical AoA-based indoor localization in multipath-rich indoor environments.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 8","pages":"331-335"},"PeriodicalIF":0.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11568181","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic-Mono: A Dynamic Hybrid CNN and Transformer Network for Self-Supervised Monocular Depth Estimation 动态单眼：用于自监督单目深度估计的动态混合CNN和变压器网络

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IEICE Communications Express Pub Date : 2026-08-01 Epub Date: 2026-06-16 DOI: 10.23919/comex.2026XBL0053

Han Zheng;Jiade Yang;Jun Yu;Jiali Cui

{"title":"Dynamic-Mono: A Dynamic Hybrid CNN and Transformer Network for Self-Supervised Monocular Depth Estimation","authors":"Han Zheng;Jiade Yang;Jun Yu;Jiali Cui","doi":"10.23919/comex.2026XBL0053","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0053","url":null,"abstract":"In monocular depth estimation networks, depth information must be inferred by modeling spatial relationships between points within the image. However, existing networks often struggle to effectively capture both local details and global spatial context. Moreover, due to biases in the dataset, the network learns these biases during training, resulting in limited model generalizability. Therefore, we propose a dynamic hybrid CNN and Transformer network for self-supervised monocular depth estimation. First, we propose a Dual-Dynamic Tanh (DDT) module, a parallel-structured hybrid architecture combining CNN and Transformer. It incorporates a Dynamic Tanh function to enhance self-attention computation, significantly improving the model's precision for small object prediction. Second, we conducted extensive experiments on both the KITTI and Make3D datasets. Finally, on the KITTI dataset, our proposed network outperforms GeoNet, DF-Net, Monodepth2, LiteMono, and GC-Depth by margins of 8.42%, 7.07%, 2.13%, 0.47%, and 0.70% respectively in the δ < 1.25 metric.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 8","pages":"345-348"},"PeriodicalIF":0.7,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11568116","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Demonstration of Low-Cost Millimeter-Wave Active Phased Array Antenna 低成本毫米波有源相控阵天线的演示

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IEICE Communications Express Pub Date : 2026-08-01 Epub Date: 2026-06-16 DOI: 10.23919/comex.2026XBL0072

Takashi Maruyama;Mitsuru Kirita;Shigeo Udagawa;Shunsuke Iki;Kazunori Kurashige

引用次数: 0