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2024 IEEE/SICE International Symposium on system Integration, SII 2024

作者： Kokubu, Ryota Oeda, Kaito Kawakita, Yuusuke Yokogawa, Shinji Tobe, Yoshito Ichikawa, Haruhisa Graduate School of Science and Engineering Aoyama Gakuin University Sagamihara Japan Kanagawa Institute of Technology Department of Information and Computer Sciences Atsugi Japan Info-Powered Energy System Research Center The University of Electro-Communications Chofu Japan

ISBN: (纸本)9798350312072

In recent years, there has been an increasing demand to adopt renewable energy resources to power grids for environmental issues and energy concerns. A virtual grid system, which is designed to utilize decentralized resources, is proposed as an approach. This system enables users to construct their power grids with virtual grid hubs (VG Hub) which interconnect via commercially available cables according to USB Power Delivery (USB PD). A prototype of VG Hub is capable of synthesizing and distributing DC power for connected devices, and the power flow control is managed by a microcontroller. Our previous study proposed a method called Minimum-Hop Power Path Routing (MHPPR). This method determines the power flow that uses the closest source in candidates which can fulfill the demand when a load connects to the network to minimize power loss due to transmission. However, this could result in unproductive power flow, such as a flow that consumes power stored in batteries prior to surplus power from generators. Therefore, we assumed that there are factors to value a source for a load other than demand and supply capacity, and inferred that the factor derives from the type of device. We defined this factor as the affinity between devices. The objective of this study is to solve the power path optimization problem while taking affinity into account. In this study, we discussed device classification and affinity between types and defined affinity coefficients. We then extended MHPPR by incorporating this affinity coefficient. The results have shown that the proposed method selected the sources following the priority defined by the affinity. © 2024 IEEE.

关键词： Renewable energy

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On the aggregate SNR of amplified relaying channels

On the aggregate SNR of amplified relaying channels

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IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： J. Boyer D.D. Falconer H. Yanikomeroglu Broadband Communications and Wireless System Centre Department of Systems and Computer Engineering Carleton University Ottawa Canada

This paper considers the aggregate signal to noise ratio of amplified relaying channels, where the term aggregate refers to the inclusion of propagated noise terms generated as relaying terminals amplify both the information and noise portions of received signals. This consideration is motivated by recent findings for wireless relaying networks indicating that the performance of amplified relaying can approach and in some cases exceed the performance of decoded relaying. Expressions for the aggregate signal to noise ratio are developed for general amplified relaying channels with a given set of source, destination, and relaying terminals, link connectivity link attenuation, transmit power, and receiver noise. These expressions provide a method for analyzing the impact of varying the link connectivity or power allocation for a given set of terminals, and support the comparison of amplified relaying channels with decoded relaying channels.

关键词： Aggregates Signal to noise ratio Decoding Digital relays Noise generators Signal generators Broadband communication Wireless communication systems engineering and theory Attenuation

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Protecting the exchange of document images in cross-enterprise process integration with web services

Protecting the exchange of document images in cross-enterpri...

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2006 10th IEEE International Enterprise Distributed Object Computing Conference Workshops, EDOCW2006

作者： Chiu, Dickson K. W. Hung, Patrick C. K. Cheng, Vivying S. Y. Kafeza, Eleanna Dickson Computer System 7A Victory Avenue Kowloon Hong Kong Faculty of Business and Information Technology University of Ontario Institute of Technology Canada Department of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong Department of Marketing and Communications Athens University of Economics and Business Greece

ISBN: (纸本)076952558X

There is now an increasing demand for sharing document images and image data for process integration among enterprises. Web services technology has recently been widely proposed and gradually adopted as a platform for supporting integrations. There are so far no holistic solutions to tackle the various protection issues in this area, especially regarding the security and privacy protection requirements in cross-enterprise progress integration. We propose the exchange of document images through a Document Image Exchange Platform (DIEP), replacing ad-hoc and manual exchange practices. We show how contemporary technologies of Web services and watermarking can help archive images with layered implementation architecture. Through dedicated Web services technologies with watermarking mechanism, not only can the development, deployment, and maintenance of software be streamlined, the privacy protection in document image exchanges as required by disparate processes can also be much facilitated. © 2006 IEEE.

关键词： Web services

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Coverage performance in Aerial-Terrestrial HetNets

arXiv

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arXiv 2019年

作者： Khoshkholgh, M.G. Navaie, Keivan Yanikomeroglu, Halim Leung, V.C.M. Shin, Kang G. Department of Electrical and Computer Engineering University of British Columbia School of Computing and Communications Lancaster University Department of System and Computer Engineering Carleton University Department of Electrical Engineering and Computer Science University of Michigan

An efficient solution to improve the coverage in cellular networks is to use unmanned aerial vehicles (UAVs), augmented with the functionalities of terrestrial base stations (BSs). This paper investigates the coverage probability in multitier Aerial-Terrestrial HetNets, where in addition to the ground BSs (G-BSs), UAV-mounted BSs (U-BS) are also introduced across tiers to improve the coverage performance. We then model the Ground-to-Ground (G2G) and Air-to-Ground (A2G) links incorporating the impact of Line-of-Sight (LOS) and non-LOS (NLOS) path-loss attenuations in various wireless environments including sub-urban, urban, dense-urban, and high-rise. Using tools of stochastic geometry, we then obtain the coverage probability in such a setting and its upper-bound as a function of the percentage of U-BSs in each tier, as well as other system parameters. We use simulations to confirm the accquracy of our analysis and investigate the impact of various system parameters on the coverage probability. The thus-obtained upper-bound provides important quantitative insights on the network coverage design and the conflicting impacts of different system parametewrs. Our sanalysis also shows that in some communication environments, e.g., high-rise and dense urban, introducing U-BSs can degrade the coverage probability. Nevertheless, our analysis suggests that to minimize the coverage cost, one may consider turning off a given percentage of G-BSs. In urban and sub-urban areas, one can also adjust the altitude of U-BSs in order to improve the coverage probability. Such a strategy, however, is shown to be ineffective in dense-urban and high-rise environments. Copyright © 2019, The Authors. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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How do non-ideal UAV antennas affect air-to-ground communications?

arXiv

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arXiv 2019年

作者： Khoshkholgh, M.G. Navaie, Keivan Yanikomeroglu, Halim Leung, V.C.M. Shin, Kang. G. Department of Electrical and Computer Engineering University of British Columbia School of Computing and Communications Lancaster University Department of System and Computer Engineering Carleton University Department of Electrical Engineering and Computer Science University of Michigan

Analysis of the performance of Unmanned Aerial Vehicle (UAV)-enabled communications systems often relies upon idealized antenna characteristic, where the side-lobe gain of UAVs' antenna is ignored. In practice, however, side-lobe cause inevitable interference to the ground users. We investigate the impact of UAVs' antenna side-lobe on the performance of UAV enabled communication. Our analysis shows that even for a very small antenna's side-lobe gain, the ground receiver can experience substantial interference. We further show that a rather large exclusion zone is required to ensure a sufficient level of protection for the ground receiver. Nevertheless, in a multiple-antenna setting for the ground users, even when such a large exclusion zone was in place, UAVs' antenna side-lobe creates a high level of correlation among the interference signals received across receive antennas. Such a correlation limits the system ability to exploit channel diversity in a multiple-antenna setting for improving capacity. We then quantify the impact of UAVs' antenna side-lobes on the overall system performance by deriving the corresponding loss of the achieved capacity in various communications environments. We provide a new quantitative insight on the cost of adopting non-ideal UAV antenna on the overall capacity. Our analysis also shows that the capacity loss can be confined by careful selection of system parameters. Copyright © 2019, The Authors. All rights reserved.

关键词： Antenna lobes

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The Interplay between Artificial Intelligence and Fog Radio Access Networks

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China communications 2020年第8期17卷 1-13页

作者： Wenchao Xia Xinruo Zhang Gan Zheng Jun Zhang Shi Jin Hongbo Zhu Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and TelecommunicationsNanjing 210003China Engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China Department of Computer Science and Electronic Engineering University of EssexColchester CO43SQU.K. Wolfson School of Mechanical Electrical and Manufacturing Engineering Loughborough UniversityLeicestershire LE113TUU.K. National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China

The interplay between artificial intelligence(AI) and fog radio access networks(F-RANs) is investigated in this work from two perspectives: how F-RANs enable hierarchical AI to be deployed in wireless networks and how AI makes F-RANs smarter to better serve mobile devices. Due to the heterogeneity of processing capability, the cloud, fog, and device layers in F-RANs provide hierarchical intelligence via centralized, distributed, and federated learning. In addition, cross-layer learning is also introduced to further reduce the demand for the memory size of the mobile devices. On the other hand, AI provides F-RANs with technologies and methods to deal with massive data and make smarter decisions. Specifically, machine learning tools such as deep neural networks are introduced for data processing, while reinforcement learning(RL) algorithms are adopted for network optimization and decisions. Then, two examples of AI-based applications in F-RANs, i.e., health monitoring and intelligent transportation systems, are presented, followed by a case study of an RL-based caching application in the presence of spatio-temporal unknown content popularity to showcase the potential of applying AI to F-RANs.

关键词： artificial intelligence(AI) fog radio access network(F-RAN) machine learning network optimization

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Coverage Performance of Aerial-Terrestrial HetNets

Coverage Performance of Aerial-Terrestrial HetNets

引用

IEEE Conference on Vehicular Technology (VTC)

作者： M. G. Khoshkholgh Keivan Navaie Halim Yanikomeroglu V. C. M. Leung Kang G. Shin Department of Electrical and Computer Engineering the University of British Columbia School of Computing and Communications Lancaster University Department of System and Computer Engineering Carleton University Electrical Engineering and Computer Science Department University of Michigan

Providing seamless coverage in current cellular network technologies is surmountable only through gross overengineering. Alternatively, as an economically effective solution, the use of unmanned aerial vehicles (UAVs), augmented with the functionalities of terrestrial base stations (BSs), is recently advocated. In this paper we investigate the effect that the incorporation of UAV-mounted BSs (U-BS) poses on the coverage probability of cellular networks. To this end, we focus on the evaluation of the coverage probability of a large-scale aerialterrestrial heterogenous cellular network (AT-HetNet), in which BSs of each technology/tier can be either ground (G-BS) or UBS. Our analysis incorporates the impact of Line-of-Sight (LOS) and non-LOS (NLOS) path-loss attenuations of both ground-toground (G2G) and Air-to-Ground (A2G) links. Adopting tools of stochastic geometry we then obtain the coverage probability as a function of main system parameters and percentage of BSs in each tier that are aerial. Using simulations we also confirm the accuracy of our analysis. We further observe that for several common communication environments, e.g., high-rise and dense urban environments, the inclusion of U-BSs can be detrimental to the coverage probability. Nevertheless, it is still possible to minimize the coverage cost by turning off a percentage of G-BSs. Interestingly, for urban and sub-urban areas one can adjust the altitude of U-BSs in order to adjust the coverage probability.

关键词： Cellular networks Interference Drones Fading channels Attenuation Analytical models Meters

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Space-Air-Ground Integrated Network with Native Intelligence(NI-SAGIN):Concept,Architecture,Access and Networking

引用

China communications 2022年第1期19卷 I0002-I0007页

作者： Zhenyu Xiao Qihui Wu Jiajia Liu Ning Zhang Tao Sun the School of Electronic and Information Engineering Beihang University IET China Institute of Communications and of Electronics the Nanjing University of Aeronautics and Astronautics(NUAA) key lab of Ministry of Industry and Information Technology of China the School of Cybersecurity Northwestern Polytechnical University Shaanxi Provincial Engineering Laboratory of Cyber Security Xi’an Unmanned System Security and Intelligent Communications ISTC Center IEEE IOT-AHSN TC IEEE Communications Society1 IEEE Vehicular Technology Society1 the Department of Electrical and Computer Engineering at University of Windsor1 China Mobile Research Institute1 GPP SA21 China Mobile’s 3GPP SA and CT groups

Ubiquitous coverage is one of the most important goals for mobile communication *** achieve this,integration of space,air,and ground networks is highly demanded,which expects to become the one of the enabling technolo... 详细信息

关键词： Access networks Networking

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A fuzzy inference system for simplifying surfaces with color 2nd

引用

2nd IEEE Pacific-Rim Conference on Multimedia, IEEE-PCM 2001

作者： Chang, Chin-Chen Yang, Shu-Kai Hsieh, Jun Wei Duan, Ding-Zhou Lin, Ming-Fen Computer and Communications Research Laboratories Industrial Technology Research Institute Chutung Hsinchu Taiwan Opto-Electronics and System Laboratories Industrial Technology Research Institute Chutung Hsinchu Taiwan Department of Electrical Engineering Yuan Ze University Taoyuan Taiwan

ISBN: (纸本)3540426809

A fuzzy inference system is presented in this paper for simplifying surfaces with color. We first propose a fuzzy surface position uncertainty, a fuzzy surface curvature uncertainty and a fuzzy surface color uncertainty to respectively measure the variations of surface position, surface curvature and surface color while simplifying surfaces. We then utilize the TSK fuzzy inference system integrating the proposed fuzzy uncertainties to determine the cost as the criteria of removing a portion of surface models. Experimental results show that our approach does produce high quality approximations of surfaces. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Color

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A design method for minimum cost path of flying probe in-circuit testers

A design method for minimum cost path of flying probe in-cir...

引用

SICE Annual Conference

作者： Yuki Hiratsuka Fumihiko Katoh Katsumi Konishi Seiichi Shin Department of System Engineering University of Electro-Communications Tokyo Japan Department of Computer Science Kogakuin University Tokyo Japan

ISBN: (纸本)9781424476428

This paper focuses on X-Y type in-circuit testers, which has two flying probes. The problem of finding the ordering of inspection points that minimizes the total time of inspection is an expansion of the travelling salesman problem (TSP). We formulate the problem of finding the minimum traveling cost of flying probes as the 0-1 integer programming, and an algorithm to solve this problem is proposed. Experimental results show the effectiveness of the method.

关键词： Probes Inspection Printed circuits Traveling salesman problems Linear programming Testing Trajectory

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