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Miniaturized Optical Intersatellite Communication Terminal – CubeISL 小型卫星间光学通信终端CubeISL
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473747
Benjamin Rödiger, C. Fuchs, Jorge Rosano Nonay, W. Jung, C. Schmidt
The increasing request for higher data rates and the technical limitations of traditional radio-frequency channels in intersatellite communication requires solutions to overcome these obstacles. German Aerospace Center (DLR) has a long heritage in optical air-to-ground and space-to-ground transmission. Due to its high data rates, resistance against interferences and being free from regulations like from the International Telecommunication Union (ITU), Free Space Optical communication (FSO) provides solutions to overcome the challenges for satellite communication.Based on the developments in the "OSIRIS4CubeSat" project, DLR transfers the technology of laser communication on CubeSats from Direct to Earth (DTE) into the intersatellite domain. Therefore, the project "CubeISL" started with the goal to develop an optical intersatellite for CubeSats. This paper discusses possible mission scenarios where CubeISL terminals can be used, the research results of a feasibility analysis and the required technical adaptions, which will be realized in the near future.
对更高数据速率的要求日益增加,卫星间通信中传统无线电频率信道的技术限制要求解决这些障碍。德国航空航天中心(DLR)在光学空对地和空对地传输方面有着悠久的传统。由于其高数据速率,抗干扰和不受国际电信联盟(ITU)等法规的限制,自由空间光通信(FSO)为克服卫星通信的挑战提供了解决方案。根据“OSIRIS4CubeSat”项目的发展,DLR将立方体卫星上的激光通信技术从直接对地(DTE)转移到星间领域。因此,“CubeISL”项目开始时的目标是为立方体卫星开发光学卫星间。本文讨论了CubeISL终端可能使用的任务场景、可行性分析的研究结果和所需的技术改造,这些将在不久的将来实现。
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引用次数: 3
Digital Twins in Industrial IoT: a survey of the state of the art and of relevant standards 工业物联网中的数字孪生:最新技术和相关标准的调查
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473889
M. Vuković, D. Mazzei, S. Chessa, G. Fantoni
Industry 4.0 revolution is in full swing and the adoption process is happening in many industries. However, companies have reservations about the transition process, especially ones with older but still functional machines. The key measure for machine Industry 4.0 readiness is their ability to communicate with other machines. This paper presents the design guidelines in the creation of digital twins in Industrial Internet of Things (I-IOT). The relevant scientific works and the most popular I-IOT digital protocols in the industry are collected and presented. Considering this information and data, the list of design guidelines are extracted and presented in the corresponding section.
工业4.0革命正在如火如荼地进行,许多行业都在采用工业4.0。然而,企业对过渡过程持保留态度,尤其是那些机器较旧但仍能正常工作的企业。衡量机器是否准备好工业4.0的关键指标是它们与其他机器的通信能力。本文介绍了在工业物联网(I-IOT)中创建数字孪生的设计指南。收集和介绍了相关的科学著作和业界最流行的I-IOT数字协议。考虑到这些信息和数据,在相应的部分中提取并呈现了设计准则列表。
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引用次数: 10
Opportunistic Network Routing Strategy Based on Node Individual Community 基于节点个体社区的机会网络路由策略
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473526
Lin Yu, Gang Xu, N. Zhang, Fengqi Wei
The spatio-temporal features of node movements are closely linked to the social relationships of nodes in opportunity networks with social attributes. Some community division-based routing algorithms are for nodes with identical or consistent community division attributes, which are more macroscopic and do not represent the role of individual network nodes. The paper builds probabilistic encounter social relations through encounters brought by node movements to highlight the role of individual nodes in the network and proposes an opportunity network routing strategy based on node individual communities based on node social relations. The strategy takes full account of the encounter characteristics of nodes in the network and constructs individual communities based on node centrality. Data transmission in opportunity networks is completed based on the individual community relationships of the nodes. It is experimentally verified that in opportunity networks with social attributes, the opportunity network routing strategy based on node individual communities proposed in the paper has a better quality in message delivery compared with the existing main opportunity routing algorithms.
在具有社会属性的机会网络中,节点运动的时空特征与节点之间的社会关系密切相关。一些基于社区划分的路由算法是针对具有相同或一致社区划分属性的节点,这些属性更为宏观,不代表单个网络节点的作用。本文通过节点运动带来的相遇构建概率相遇社会关系,突出个体节点在网络中的作用,并基于节点社会关系提出了基于节点个体社区的机会网络路由策略。该策略充分考虑网络中节点的相遇特征,基于节点中心性构建个体社区。机会网络中的数据传输是基于节点之间的个体社区关系来完成的。实验验证了在具有社会属性的机会网络中,本文提出的基于节点个体社区的机会网络路由策略比现有的主要机会路由算法具有更好的消息传递质量。
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引用次数: 1
Monitoring Operating Conditions of Wireless Power Transfer Systems Using Distributed Estimation Process 基于分布式估计过程的无线输电系统运行状态监测
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473792
M. Rana, A. Abdel-Hadi, W. Shireen
The cyber-physical system such as wireless information and wireless power (WIPT) transfer plays an important role in the internet of things (IoT) applications. The billions of smart objects and devices are connected to the global IoT platform. To get benefit from the IoT technology, smart customers and system operators demand to supply wireless power wireless for making electronic things alive. In this way, the IoT can make greener and smart city with an interconnected digital platforms. However, it is a very difficult and challenging task for supplying wireless power to the smart objects. In order to provide wireless power to the IoT enabled devices, the wireless power transfer system can play a vital role for providing greener and sustainable environment. In light of this demand, this paper provides a comprehensive literature review and potential research challenges for WIPT incorporating wireless power transfer (WPT) system. In order to supply energy to the devices, the electricity generating electronics circuit requires to know the operating conditions of the system state, which acts as a precursor to design the controller. To know the system operating conditions of wireless power transfer system, the distributed state estimation algorithm is proposed and it convergence is analysed. Finally, the proposed algorithm is verified considering the WPT system. For doing this, the state-space framework of the WPT system is developed. Numerical simulations results show that the proposed algorithms can able to estimate and stabilise the WPT system states within a short period of time. Therefore, this framework is valuable to design WIPT and IoT platform and provide a compressive of source for researchers.
无线信息和无线电源传输等信息物理系统在物联网应用中发挥着重要作用。数十亿的智能对象和设备连接到全球物联网平台。为了从物联网技术中获益,智能客户和系统运营商需要提供无线电源,使电子事物充满活力。通过这种方式,物联网可以通过互联的数字平台使城市更加绿色和智慧。然而,为智能物体提供无线电源是一项非常困难和具有挑战性的任务。为了向支持物联网的设备提供无线电源,无线电源传输系统可以在提供更绿色和可持续的环境方面发挥至关重要的作用。鉴于这一需求,本文提供了一个全面的文献综述和潜在的研究挑战,包括无线电力传输(WPT)系统的WIPT。为了向设备供电,发电电子电路需要知道系统状态的运行条件,这是设计控制器的前提。为了了解无线电力传输系统的运行状态,提出了分布式状态估计算法,并对其收敛性进行了分析。最后,结合WPT系统对算法进行了验证。为此,开发了WPT系统的状态空间框架。数值仿真结果表明,该算法能够在短时间内估计和稳定WPT系统的状态。因此,该框架对WIPT和物联网平台的设计具有一定的参考价值,并为研究人员提供了信息源的压缩。
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引用次数: 2
Multiple Cascaded Preconfigured Cycles for the FRER Mechanism in Time-Sensitive Networking 时间敏感网络中frr机制的多级联预配置周期
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473726
Zongchen Yao, Yueping Cai, Tianchi Li
TSN (Time-Sensitive Networking) defines a set of standards that add deterministic low-latency services to Ethernet. High reliability is also one essential feature of TSN. IEEE 802.1CB introduces the FRER (Frame Replication and Elimination for Reliability) mechanism for TSN. It transmits duplicated frames through two disjoint paths and eliminates one copy at the destination node to improve the service reliability. However, it is not always an easy task to find two disjoint paths between the source and destination nodes considering different network topologies and network states. In addition, the FRER mechanism only considers paths with the shortest number of hops without considering the properties of links such as reliability, load, and centrality. This paper proposes a method called Multiple Cascaded Preconfigured Cycles (FRER-MPC) to find two optimized paths for the FRER mechanism in TSN. The FRER-MPC mechanism selects a working path based on the link priority model, and it computes a redundant path through multiple preconfigured cycles. Simulation results show that it effectively improves the path reliability with some extra bandwidth consumptions.
TSN(时间敏感网络)定义了一组向以太网添加确定性低延迟服务的标准。高可靠性也是TSN的一个基本特征。IEEE 802.1CB为TSN引入了frr (Frame Replication and Elimination for Reliability)机制。它通过两条不相交的路径传输重复帧,并在目的节点消除一份拷贝,以提高业务可靠性。然而,考虑到不同的网络拓扑结构和网络状态,在源节点和目的节点之间找到两条不相交的路径并不总是一件容易的事情。此外,FRER机制只考虑跳数最短的路径,而不考虑链路的可靠性、负载和中心性等属性。本文提出了一种称为多级联预配置周期(FRER- mpc)的方法来寻找TSN中frr机制的两条优化路径。FRER-MPC机制根据链路优先级模型选择工作路径,并通过多个预配置的循环计算出冗余路径。仿真结果表明,该方法在增加带宽消耗的同时,有效地提高了路径可靠性。
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引用次数: 0
An EMD- and GRU-based hybrid network traffic prediction model with data reconstruction 基于EMD和gru的数据重构混合网络流量预测模型
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473822
Shuang Du, Zhanqi Xu, Jianxin Lv
Network traffic can reflect the operating status and resource bottleneck of the entire network. Accurate prediction of the future network is helpful in network maintenance, network optimization, routing policy design, load balancing, protocol design, and anomaly detection. However, the self-similarity, periodicity, chaos, multi-scale, and other characteristics of modern network traffic make it challenging to predict network behaviors. The available prediction models focus only on self-similarity and burstiness, lacking a more accurate and comprehensive description of the characteristics of network traffic. In this paper, we propose a prediction model based on Empirical Mode Decomposition (EMD) and the Gated Recurrent Unit (GRU) neural network with data reconstruction. First, the traffic data are reconstructed by complementing missing-points and eliminating outliers. Then, we decompose the reconstructed traffic data into several components through EMD and use each component to train the corresponding GRU neural network. Finally, the predicted values of all components are combined to get the final result. Numerical results show that the proposed prediction model offers higher accuracy and more stable performance than the state-of-the-art models.
网络流量可以反映整个网络的运行状况和资源瓶颈。对未来网络的准确预测有助于网络维护、网络优化、路由策略设计、负载均衡、协议设计和异常检测。然而,现代网络流量的自相似性、周期性、混沌性、多尺度性等特点给网络行为预测带来了挑战。现有的预测模型只关注自相似性和突发性,缺乏对网络流量特征更准确和全面的描述。本文提出了一种基于经验模态分解(EMD)和门控循环单元(GRU)神经网络的数据重构预测模型。首先,通过补缺点和剔除离群值的方法重构交通数据;然后,我们通过EMD将重建的交通数据分解成多个分量,并使用每个分量训练相应的GRU神经网络。最后,将各分量的预测值进行组合得到最终结果。数值结果表明,该预测模型比现有模型具有更高的精度和更稳定的性能。
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引用次数: 3
A Terminal Classification Scheme with Imbalanced Dataset Based on Low-Complexity Time-LSTM 基于低复杂度Time-LSTM的不平衡数据集终端分类方案
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473589
Rui Yang, X. Liu, Wenbo Xu, Jie-fang Wu, Yang Zhang
With the rapid development of wireless communication, various kinds of mobile terminals may communicate with each other. To provide sufficient security and privacy, classification of the source terminals is generally critical. In this paper, we set up several scattered sensors collecting the received field strength and capture time for classification. To deal with the unknown propagation environment, imbalanced dataset and irregular sampling time, we propose a terminal classification scheme based on Long Short-Term Memory (LSTM) network. First, the problem of imbalanced dataset is solved by designing a preprocessing method called random interval sampling method, where the samples for class with less terminals are resampled. Then, the information of the irregular sampling time is incorporated into the classification to obtain extra benefit. Experimental results based on real-world data demonstrate that when compared with the exsiting LSTM schemes, the proposed classification model effectively utilizes the irregular time intervals and achieves excellent classification perfomance with imbalanced dataset.
随着无线通信的飞速发展,各种移动终端之间可以进行通信。为了提供足够的安全性和私密性,源终端的分类通常是至关重要的。在本文中,我们设置了几个分散的传感器,收集接收的场强和捕获时间进行分类。针对未知的传播环境、不平衡的数据集和不规则的采样时间,提出了一种基于LSTM网络的终端分类方案。首先,通过设计一种随机间隔采样的预处理方法来解决数据集不平衡的问题,该方法对终端较少的类的样本进行重采样。然后,将不规则采样时间的信息纳入到分类中,以获得额外的收益。基于真实数据的实验结果表明,与现有的LSTM方案相比,本文提出的分类模型有效地利用了不规则时间间隔,在不平衡数据集下取得了优异的分类性能。
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引用次数: 0
Signal Processing of Multi-Mode-Multi-Spatial (MOMS) in Line-of-Sight Channels 视距信道中多模多空间(mom)信号处理
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473711
Yi Lv, Rui Ni, Qian Zhu, M. Debbah
Orbital angular momentum (OAM) is a special branch of the traditional multi-input multi-output (MIMO) system, when the antennas sensitive to the linear momentum of the electromagnetic (EM) field are used to detect radio waves carrying OAM. In essence, the special pattern of the OAM wavefront phase distribution information is a special group of orthogonal bases of the EM field in the spatial dimension. The multi-mode multi-spatial (MOMS) scheme discussed in this paper is a generalized closed-loop multi-antenna communication system solution. To adapt more mobile application scenarios, and taking the divergence characteristic of OAM transmission into consideration, we no longer maintain the orthogonality between multiple OAM modes, and use successive interference cancellation (SIC) to obtain the spatial multiplexing gain of OAM. Compared with the traditional MIMO detection schemes, the MOMS scheme is more robust in the sparse multipath channel scenarios, and can obtain most spatial degrees of freedom (DoF) in terms of antenna aperture and channel geometry. Simulation results show that the performance of OAM-MIMO system using MOMS-SIC provides about 0.5 ~ 1.5dB for the system with different supported modes.
轨道角动量(OAM)是传统多输入多输出(MIMO)系统的一个特殊分支,利用对电磁场线性动量敏感的天线来探测携带轨道角动量的无线电波。OAM波前相位分布信息的特殊模式本质上是电磁场在空间维度上的一组特殊正交基。本文讨论的多模多空间(mom)方案是一种广义的闭环多天线通信系统解决方案。为了适应更多的移动应用场景,考虑到OAM传输的发散特性,我们不再保持多个OAM模式之间的正交性,而是使用连续干扰抵消(SIC)来获得OAM的空间复用增益。与传统的MIMO检测方案相比,mom方案在稀疏多径信道场景下具有更强的鲁棒性,并且可以在天线孔径和信道几何形状方面获得最大的空间自由度。仿真结果表明,在支持不同模式的情况下,采用MOMS-SIC的OAM-MIMO系统的性能约为0.5 ~ 1.5dB。
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引用次数: 0
Using Control Theory and Bayesian Reinforcement Learning for Policy Management in Pandemic Situations 应用控制理论和贝叶斯强化学习在大流行情况下的政策管理
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473604
Heena Rathore, A. Samant
As engineers and scientists, it is our responsibility to learn lessons from the recent pandemic outbreak and see how public health policies can be effectively managed to reduce the severe loss of lives and minimize the impact on people’s livelihood. Non-pharmaceutical interventions, such as in-place sheltering and social distancing, are typically introduced to slow the spread (flatten the curve) and reverse the growth of the virus. However, such approaches have the unintended consequences of causing economic activities to plummet and bringing local businesses to a standstill, thereby putting millions of jobs at risk. City administrators have generally resorted to an open loop, belief-based decision-making process, thereby struggling to manage (identify and enforce) timely and optimal policies. To overcome this challenge, this position paper explores a systematically designed, feedback-based strategy, to modulate parameters that control suppression and mitigation. Our work leverages advances in Bayesian Reinforcement Learning algorithms and known techniques in control theory, to stabilize and diminish the rate of propagation in pandemic situations. This paper discusses how offline exploitation using pre-trigger data, online exploration using observations from the environment, and a careful orchestration between the two using granular control of multiple on-off control signals can be used to modulate policy enforcement based on established metrics, such as reproduction number.
作为工程师和科学家,我们有责任从最近的疫情中吸取教训,研究如何有效管理公共卫生政策,减少严重的生命损失,最大限度地减少对民生的影响。通常采取非药物干预措施,如就地庇护和保持社交距离,以减缓传播(使曲线变平)并扭转病毒的增长。然而,这种做法会产生意想不到的后果,导致经济活动急剧下降,使当地企业陷入停滞,从而使数百万个工作岗位面临风险。城市管理者通常采用开环、基于信念的决策过程,因此难以管理(识别和执行)及时和最佳的政策。为了克服这一挑战,本文探讨了一种系统设计的、基于反馈的策略,以调节控制抑制和缓解的参数。我们的工作利用了贝叶斯强化学习算法的进步和控制理论中的已知技术,以稳定和降低大流行情况下的传播速度。本文讨论了如何使用预触发数据进行离线开发,使用来自环境的观察进行在线探索,以及如何使用多个开关控制信号的粒度控制在两者之间进行精心编排,从而根据已建立的度量(如复制数)来调节策略实施。
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引用次数: 0
An Optimal Sensor Deployment Technique for Spectrum Monitoring Applications 一种用于频谱监测的最佳传感器部署技术
Pub Date : 2021-06-01 DOI: 10.1109/ICCWorkshops50388.2021.9473884
Yifeng Zhou
Spectrum monitoring is a key element of spectrum management process, in which spectrum sensors are considered the most crucial component. In this paper, we discuss the problem of optimal sensor deployment for spectrum monitoring applications. Optimal sensor deployment can significantly reduce the cost of sensor deployment and improve spectrum monitoring performance and efficiency. An optimal sensor deployment technique is developed, which provides the minimized number of sensors required, as well as their locations of deployment, for monitoring transmissions by desired stations in an area of interest. The problem of optimal sensor deployment is formulated using binary linear integer programming that is solved using efficient numerical optimization algorithms. The technique is scalable in the sense that it considers the effects of pre-installed or existing spectrum sensors in the area. Finally, we apply the technique to an Ottawa area for deploying sensor to monitor all down-link transmissions in the 800 MHz Land Mobile Radio (LMR) band to demonstrate its effectiveness and performance.
频谱监测是频谱管理的重要组成部分,而频谱传感器是其中最关键的组成部分。本文讨论了频谱监测应用中传感器的优化部署问题。传感器优化部署可以显著降低传感器部署成本,提高频谱监测性能和效率。开发了一种最佳传感器部署技术,该技术提供了所需传感器的最小数量及其部署位置,用于监测感兴趣区域内所需站点的传输。传感器的最优部署问题是用二进制线性整数规划来表述的,并使用高效的数值优化算法来求解。该技术是可扩展的,因为它考虑了该地区预安装或现有频谱传感器的影响。最后,我们将该技术应用于渥太华地区,用于部署传感器来监测800 MHz陆地移动无线电(LMR)频段的所有下行链路传输,以证明其有效性和性能。
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引用次数: 1
期刊
2021 IEEE International Conference on Communications Workshops (ICC Workshops)
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