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Impact of NFV resources distribution on inter-subnetwork latency NFV资源分配对子网间时延的影响
Q3 Engineering Pub Date : 2023-01-01 DOI: 10.5937/telfor2301014i
Gjorgji Ilievski, Pero Latkoski
5G networks are already being implemented around the globe. One of the most important enablers of their penetration are the Software Defined Networking (SDN) technologies and the Network Functions Virtualization (NFV) architecture, which allow the needed flexibility of the network and the composing elements. In such circumstances, the Internet-of-Things (IoT), which has been long awaited, is becoming feasible and economically reasonable. This setup has its challenges, especially due to the network expansion toward the edge, where the number of networking elements and service consumers is rapidly rising. The compute resources and the storage have to be brought in the network proximity of the access network, so that the latency of the service is kept under 1ms, which is one of the base 5G requirements. For our research, we have made an experimental setup of a distributed NFV architecture on a multiple geo-location, with a main objective to review the network latency caused by the architectural distribution of the services that are built in it. The results can be used by researchers and network architects to build reliable and costeffective distributed services with the lowest possible latency, as well as to plan possible disaster recovery scenarios when some physical location is unavailable.
5G网络已经在全球范围内实施。软件定义网络(SDN)技术和网络功能虚拟化(NFV)体系结构是它们渗透的最重要的推动因素之一,它们允许网络和组成元素所需的灵活性。在这种情况下,人们期待已久的物联网(IoT)变得可行且经济合理。这种设置有其挑战,特别是由于网络向边缘扩展,其中网络元素和服务消费者的数量正在迅速增加。计算资源和存储必须被引入接入网的网络附近,从而使服务的延迟保持在1ms以下,这是5G的基本要求之一。在我们的研究中,我们在多个地理位置上建立了一个分布式NFV架构的实验设置,其主要目的是检查由其中构建的服务的架构分布引起的网络延迟。研究人员和网络架构师可以使用这些结果以尽可能低的延迟构建可靠且经济有效的分布式服务,并在某些物理位置不可用时规划可能的灾难恢复场景。
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引用次数: 0
Data acquisition for testing potential detection of Flavescence dorée with a designed, affordable multispectral camera 数据采集测试的潜在检测与设计,价格合理的多光谱相机
Q3 Engineering Pub Date : 2023-01-01 DOI: 10.5937/telfor2301002b
Marko Barjaktarović, Massimo Santoni, Michele Faralli, Massimo Bertamini, Lorenzo Bruzzone
There is a constant push on agriculture to produce more food and other inputs for different industries. Precision agriculture is essential to meet these demands. The intake of this modern technology is rapidly increasing among large and medium-sized farms. However, small farms still struggle with their adaptation due to the expensive initial costs. A contribution in handling this challenge, this paper presents data gathering for testing an in-house made, cost-effective, multispectral camera to detect Flavescence dorée (FD). FD is a grapevine disease that, in the last few years, has become a major concern for grapevine producers across Europe. As a quarantine disease, mandatory control procedures, such as uprooting infected plants and removing all vineyard if the infection is higher than 20%, lead to an immense economic loss. Therefore, it is critical to detect each diseased plant promptly, thus reducing the expansion of Flavescence dorée. Data from two vineyards near Riva del Garda, Trentino, Italy, was acquired in 2022 using multispectral and hyperspectral cameras. The initial finding showed that there is a possibility to detect Flavescence dorée using Linear discriminant analysis (LDA) with hyperspectral data, obtaining an accuracy of 96.6 %. This result justifies future investigation on the use of multispectral images for Flavescence dorée detection.
不断推动农业生产更多的粮食和其他投入到不同的行业。精准农业对满足这些需求至关重要。大中型农场对这种现代技术的采用正在迅速增加。然而,由于昂贵的初始成本,小农场仍在努力适应。为了应对这一挑战,本文介绍了用于测试内部制造的、具有成本效益的多光谱相机的数据收集方法,以检测黄斑变性(FD)。FD是一种葡萄藤疾病,在过去的几年里,已经成为整个欧洲葡萄藤生产商的主要关注点。作为一种检疫性疾病,强制性控制程序,如连根拔起受感染的植物,如果感染率高于20%,则将所有葡萄园移走,会导致巨大的经济损失。因此,及时发现每一株病株是至关重要的,这样可以减少黄萎病的蔓延。数据来自意大利Trentino Riva del Garda附近的两个葡萄园,于2022年使用多光谱和高光谱相机获得。初步结果表明,利用高光谱数据进行线性判别分析(LDA)检测黄酮是可行的,准确率达96.6%。这一结果证明了在未来的研究中使用多光谱图像来检测黄萎病。
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引用次数: 0
Adaptive thresholding for sparse image reconstruction 稀疏图像重建的自适应阈值
Q3 Engineering Pub Date : 2023-01-01 DOI: 10.5937/telfor2301008v
Ivan Volarić, Victor Sucic
The performance of the class of sparse reconstruction algorithms which is based on the iterative thresholding is highly dependent on a selection of the appropriate threshold value, controlling a trade-off between the algorithm execution time and the solution accuracy. This is why most of the state-of-the-art reconstruction algorithms employ some method of decreasing the threshold value as the solution converges toward the optimal one. To address this problem we propose a data-driven adaptive threshold selection method based on the fast intersection of confidence intervals (FICI) method, with which we have augmented the two-step iterative shrinkage thresholding (TwIST) algorithm. The performance of the proposed algorithm, denoted as the FICI-TwIST algorithm, has been evaluated on a problem of image reconstruction with the missing pixels, exploiting image sparsity in the discrete cosine transformation domain. The obtained results have shown competitive performance in comparison with a number of state-of-the-art sparse reconstruction algorithms, even outperforming them in some scenarios.
基于迭代阈值的稀疏重建算法的性能高度依赖于合适阈值的选择,控制算法执行时间和求解精度之间的权衡。这就是为什么大多数最先进的重建算法在解收敛到最优解时采用某种降低阈值的方法。为了解决这一问题,我们提出了一种基于快速置信区间交叉(FICI)方法的数据驱动自适应阈值选择方法,并对两步迭代收缩阈值(TwIST)算法进行了扩展。该算法的性能被称为FICI-TwIST算法,在一个缺失像素的图像重建问题上进行了评估,该问题利用了离散余弦变换域的图像稀疏性。所获得的结果显示出与许多最先进的稀疏重建算法相比具有竞争力的性能,甚至在某些情况下优于它们。
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引用次数: 0
Study of a new method of radio-sensor identification of radio-electronic devices 无线电电子设备无线传感器识别新方法的研究
Q3 Engineering Pub Date : 2023-01-01 DOI: 10.5937/telfor2301026b
Konstantin Boikov
The purpose of this work is to increase the protection of radio-electronic devices from illegal cloning, by studying a new physically unclonable functions (PUF) connected with the own electromagnetic radiation of a radio-electronic device. The work uses experimental research methods to record the electrical component of the electromagnetic field emitted by the product - the signal radio profile (SRP). Correlation analysis methods for product authentication, Pearson's statistical agreement method for identification are used. The practical significance of the work lies in the possibility of using the SRP to identify a group of devices and radio-technical protection of a radio-electronic product from fakes and illegal copies.
这项工作的目的是通过研究与无线电电子设备自身电磁辐射有关的一种新的物理不可克隆功能(PUF),增加对无线电电子设备的保护,使其免受非法克隆。这项工作使用实验研究方法来记录产品发出的电磁场的电气成分-信号无线电剖面(SRP)。相关分析方法用于产品认证,皮尔逊统计一致法用于鉴定。这项工作的实际意义在于,有可能使用SRP来识别一组设备和无线电电子产品的无线电技术保护,使其免遭假冒和非法复制。
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引用次数: 0
Resilient multipath routing protocol to enable hazardous event monitoring with wireless sensor network 弹性多路径路由协议,实现无线传感器网络的危险事件监控
Q3 Engineering Pub Date : 2023-01-01 DOI: 10.5937/telfor2301020q
Bálint Üveges, Máté Lőrincz, András Oláh
With the growing impact of climate change, the occurrence of hazardous spatial events increases. Wireless sensor networks are suitable to sense, monitor, and report such events in remote or inaccessible locations. Hazardous events are rare compared to the network's lifetime, thus maintaining its consistency must be realized energy efficiently. During the impact, the network must monitor the event with precision, and report the incidence, while mitigating the loss of perishing nodes. To fulfill these requirements, we propose the Self-healing Multipath Routing Protocol that is based on the Heterogeneous Disjoint Multipath Routing Protocol and introduces application-specific extensions to improve network stability, resiliency, and failover. To realize the monitoring of spatially extended hazardous events we introduce an event-based, application-level protocol. To evaluate the routing protocol, we perform simulations utilizing a cellular automaton-based wildfire model as the spatial event and provide measurement results including delivery ratio, consumed energy, and protocol-specific metrics.
随着气候变化的影响越来越大,危险空间事件的发生也越来越多。无线传感器网络适用于感知、监控和报告远程或不可访问位置的此类事件。相对于网络的生命周期而言,危险事件是罕见的,因此保持网络的一致性必须有效地实现。在影响期间,网络必须对事件进行精确监控,并报告事件发生情况,同时减少失效节点的损失。为了满足这些需求,我们提出了基于异构分离多路径路由协议的自修复多路径路由协议,并引入了特定于应用程序的扩展,以提高网络的稳定性、弹性和故障转移。为了实现对空间扩展的危险事件的监测,我们引入了一个基于事件的应用层协议。为了评估路由协议,我们利用基于元胞自动机的野火模型作为空间事件进行模拟,并提供测量结果,包括交付率、消耗的能量和特定于协议的指标。
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引用次数: 0
Compact two-position phase shifter 紧凑型二位移相器
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.5937/telfor2201039l
D. Letavin
The paper proposes and investigates the topology of a phase shifter based on a directional coupler. The dimensions of such a device are reduced by using artificial transmission lines instead of quarter-wave sections. By connecting several pairs of phase-shifting cells instead of the usual one, it was possible to obtain a phase shifter design with two phase shifts (instead of one).
本文提出并研究了一种基于定向耦合器的移相器拓扑结构。这种装置的尺寸通过使用人工传输线而不是四分之一波段来减小。通过连接几对移相单元而不是通常的移相单元,可以获得具有两个移相(而不是一个)的移相器设计。
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引用次数: 9
Simulation environment for scalability and performance analysis in hierarchically organized IoT systems 用于分层组织物联网系统中可扩展性和性能分析的仿真环境
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.5937/telfor2202085t
Haris Turkmanović, I. Popović, Zoran Čiča, D. Drajić
The accelerated development of technologies, especially in the field of telecommunications, ease the integration of embedded devices within various IoT applications. Modern IoT applications assume heterogenous embedded platforms capable of collecting, processing, and exchanging data between the tiers of the IoT system architecture. Designing a multi-tier IoT system, even in the case of architecture that involves a small number of intelligent embedded devices, can be a very demanding process, especially when dealing with the strict requirements of IoT application concerning application performance, scalability, and energy consumption. In this paper, an open-source simulation framework for the performance analysis of an arbitrary multi-tiered IoT system is presented. Framework supports insight into the data availability within the tiers of IoT system enabling designers to evaluate the performance of IoT application and to engineer the system operation and deployment. Besides the performance analysis, proposed framework enables the analysis of energy consumption, architecture scalability utilizing different communication patterns and technologies. The case study of a large-scale IoT application for demonstrating the framework potential regarding the scalability and data availability analysis is also given.
技术的加速发展,特别是在电信领域,简化了嵌入式设备在各种物联网应用中的集成。现代物联网应用采用异构嵌入式平台,能够在物联网系统架构的各层之间收集、处理和交换数据。设计一个多层物联网系统,即使是涉及少量智能嵌入式设备的架构,也可能是一个非常苛刻的过程,特别是在处理物联网应用对应用性能、可扩展性和能耗的严格要求时。本文提出了一个用于任意多层物联网系统性能分析的开源仿真框架。框架支持洞察物联网系统层内的数据可用性,使设计人员能够评估物联网应用程序的性能并设计系统操作和部署。除了性能分析之外,所提出的框架还可以利用不同的通信模式和技术进行能耗分析、体系结构可伸缩性分析。还给出了一个大型物联网应用的案例研究,以展示框架在可扩展性和数据可用性分析方面的潜力。
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引用次数: 0
Serious game development of COVID-19 social distancing simulator using agent-based modelling 基于agent建模的COVID-19社交距离模拟器严肃游戏开发
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.5937/telfor2202079p
Adi Putra, Gumelar Bimo, W. Teguh, Sulistyono Teguh, Alvin Julian, Gerardo Laksono, Nugraheni Diah
A social distancing protocol has been acknowledged and encouraged practically everywhere, since the global COVID-19 epidemic in 2020. This research resulted in the Serious game to simulate social distance using agent-based modeling so that it can be used as a medium of entertainment and educate the public during the Pandemic COVID-19 conditions by developing simulation games using UNITY 3D to educate in the middle of the COVID-19 pandemic and reduce transmission rates on an individual scale.
自2020年全球COVID-19流行以来,几乎所有地方都认可和鼓励社交距离协议。这项研究产生了Serious游戏,使用基于代理的建模来模拟社交距离,以便在COVID-19大流行期间通过使用UNITY 3D开发模拟游戏来进行教育,并在COVID-19大流行期间使用它作为娱乐媒介和教育公众,并降低个人规模的传播率。
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引用次数: 0
Design, implementation and experimental testing of a hybrid power supply of remote measuring station in the Surveillance, Alert & Warning System (SAWS) 监视、警报和预警系统(SAWS)遥测站混合电源的设计、实现和实验测试
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.5937/telfor2201012d
Željko V. Despotović, Marko Tajdić
The paper presents the design, implementation and experimental testing of a hybrid power supply of telecommunication and measuring equipment incorporated in remote measuring stations, which are an integral part of the global Surveillance, Alert & Warning System (SAWS) in the Republic of Serbia. In these systems, it is very important to provide autonomy of permanent, reliable and quality power supply. In this case, the power supply system is in effect based on the use of solar energy i.e., photovoltaic (PV), in combination with the mains power supply 230V, 50Hz. Solar power is the primary source of power during the day, while in night conditions the secondary power supply is a distribution power grid (more precisely, the distribution power which is used for supplying the night street lighting). This hybrid power system is realized with two controlled chargers (MPPT solar and mains with input power factor correction), battery bank 12V/110Ah with the corresponding system for its monitoring and secondary DC/DC power converters for supplying telecommunication and measuring electronic modules. The key implementation and experimental results obtained during the realization of a SAWS remote measuring station on the river Ub (municipality of Ub), will be presented in the paper.
本文介绍了塞尔维亚共和国全球监测、警报和预警系统(SAWS)的组成部分——远程测量站的通信和测量设备混合电源的设计、实现和实验测试。在这些系统中,提供永久、可靠和优质的自主供电是非常重要的。在这种情况下,供电系统实际上是基于使用太阳能即光伏(PV),结合市电供电230V, 50Hz。太阳能是白天的主要电源,而在夜间,次要电源是配电电网(更准确地说,是用于供应夜间街道照明的配电电源)。该混合电源系统由两个受控充电器(MPPT太阳能和带输入功率因数校正的市电)、12V/110Ah的蓄电池组和相应的监控系统以及为通信和测量电子模块供电的次级DC/DC电源转换器实现。本文将介绍在乌布河(乌布市)上建立的saw遥感站的关键实现和实验结果。
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引用次数: 0
Logical framework of information technology: Systematization of software development research 信息技术的逻辑框架:软件开发研究的系统化
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.5937/telfor2201026s
Maylawati Sa'adillah, Ramdhani Ali
This article aims to present a comprehensive Logical Framework for Information Technology (IT) Research, specifically for developing customized IT applications or software. The methodology of writing this article uses a content analysis with the main source of literature review, Focus Discussion Group, and also based on the experience and knowledge of the authors as lecturers of Software Engineering and Software Project Management. This article shows that although current IT development approaches or methodologies (especially software development methodology) continue to develop, good IT design is carried out through six main stages, namely planning, analysis, design, construction, implementation, and maintenance. The success of IT implementation depends on the good process of all stages of IT design. The involvement of all actors/ stakeholders in IT design is essential to be accommodated at all stages of IT design. Quality also becomes the main goal and controls every process of IT development.
本文旨在为信息技术(IT)研究提供一个全面的逻辑框架,特别是用于开发定制的IT应用程序或软件。撰写本文的方法使用了内容分析,主要来源是文献综述,焦点讨论组,也基于作者作为软件工程和软件项目管理讲师的经验和知识。本文表明,尽管当前的IT开发方法(尤其是软件开发方法)仍在不断发展,但良好的IT设计是通过六个主要阶段进行的,即计划、分析、设计、构建、实现和维护。IT实施的成功取决于IT设计各个阶段的良好流程。在IT设计的所有阶段,所有参与者/涉众的参与都是必不可少的。质量也成为IT开发的主要目标,控制着IT开发的每一个过程。
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引用次数: 1
期刊
Telfor Journal
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