共查询到20条相似文献，搜索用时 15 毫秒
1.
Peter Papcun Erik Kajati Dominika Cupkova Jozef Mocnej Martin Miskuf Iveta Zolotova 《Concurrency and Computation》2020,32(13)
In this contribution, we define the concept of transferring intelligence from the cloud to the edge of the network and highlight its importance in modern IoT architectures. It leads to edge‐enabled IoT solutions, where intelligence is distributed to the end devices, ie, edge of the network. The IoT gateway is a middle‐ware between devices and cloud and facilitates computations and communication. We have encountered a research gap and decided to propose our solution on creating an edge‐enabled IoT gateway and evaluating its rating by functionality. In the beginning, we describe the general architecture where we demonstrate the location of the edge‐enabled IoT gateway in edge‐enabled solution. Then, we discuss a selection of major criteria, which could be implemented to any edge‐enabled solution. In the end, we evaluate our proposed edge‐enabled IoT gateway and also compare several scientific works focused on IoT gateway design according to our criteria. 相似文献
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Making resources closer to the user might facilitate the integration of new technologies such as edge, fog, cloud computing, and big data. However, this brings many challenges shall be overridden when distributing a real‐time stream processing, executing multiapplication in a safe multitenant environment, and orchestrating and managing the services and resources into a hybrid fog/cloud federation. In this article, first, we propose a business process model and notation (BPMN) extension to enable the Internet of Things (IoT)‐aware business process (BP) modeling. The proposed extension takes into consideration the heterogeneous IoT and non‐IoT resources, resource capacities, quality of service constraints, and so forth. Second, we present a new IoT‐fog‐cloud based architecture, which (i) supports the distributed inter and intralayer communication as well as the real‐time stream processing in order to treat immediately IoT data and improve the entire system reliability, (ii) enables the multiapplication execution within a multitenancy architecture using the single sign‐on technique to guarantee the data integrity within a multitenancy environment, and (iii) relies on the orchestration and federation management services for deploying BP into the appropriate fog and/or cloud resources. Third, we model, by using the proposed BPMN 2.0 extension, smart autistic child and coronavirus disease 2019 monitoring systems. Then we propose the prototypes for these two smart systems in order to carry out a set of extensive experiments illustrating the efficiency and effectiveness of our work. 相似文献
3.
在智能医疗中,将云计算技术与物联网技术结合,可有效解决大规模医疗数据的实时访问问题.然而,数据上传到远程云服务器,将带来额外的通信开销与传输时延.借助雾计算技术,以终端设备作为雾节点,辅助云服务器在本地完成数据存储与访问,能够实现数据访问的低延迟与高移动性.如何保障基于雾计算的智能医疗环境的安全性成为近期研究热点.面向基于雾计算的智能医疗场景,设计认证协议的挑战在于:一方面,医疗数据是高度敏感的隐私数据,与病人身体健康密切相关,若用户身份泄漏或者数据遭到非法篡改将导致严重后果;另一方面,用户设备和雾节点往往资源受限,认证协议在保护用户隐私的同时,需要实现用户、雾节点、云服务器之间的三方数据安全传输.对智能医疗领域两个具有代表性的认证方案进行安全分析,指出Hajian等人的协议无法抵抗验证表丢失攻击、拒绝服务攻击、仿冒攻击、设备捕获攻击、会话密钥泄漏攻击;指出Wu等人的协议无法抵抗离线口令猜测攻击、仿冒攻击.提出一个基于雾计算的智能医疗三方认证与密钥协商协议,采用随机预言机模型下安全归约、BAN逻辑证明和启发式分析,证明所提方案能实现双向认证与会话密钥协商,并且对已知攻击是安全的;与同类... 相似文献
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The energy demand for Internet of Things (IoT) applications is increasing with a rise in IoT devices. Rising costs and energy demands can cause serious problems. Fog computing (FC) has recently emerged as a model for location-aware tasks, data processing, fast computing, and energy consumption reduction. The Fog computing model assists cloud computing in fast processing at the network's edge, which also exerts a vital role in cloud computing. Due to the fast computing in fog servers, different quality of service (QoS) approaches have been proposed in various sections of the fog system, and several quality factors have been considered in this regard. Despite the significance of QoS in Fog computing, no extensive study has focused on QoS and energy consumption methods in this area. Therefore, this article investigates previous research on the use and guarantee of Fog computing. This article reviews six general approaches that discuss the published articles between 2015 and late May 2023. The focal point of this paper is evaluating Fog computing and the energy consumption strategy. This article further shows the advantages, disadvantages, tools, types of evaluation, and quality factors according to the selected approaches. Based on the reviewed studies, some open issues and challenges in Fog computing energy consumption management are suggested for further study. 相似文献
5.
Gabriel Wainer 《Software》2007,37(13):1377-1404
ATLAS is a modeling language that permits a static view of a city section to be defined for simulating traffic in closed areas. We propose a methodology that is focused on the user while being able to improve the software development activities. The models are formally specified, avoiding a high number of errors in the application, thus reducing the problem solving time. Streets are characterized by their traffic direction, number of lanes, etc. Once the urban section is outlined, the traffic flow is automatically set up. Specialized behavior is included to model traffic lights, trucks, traffic signs, railways, etc. The basic idea is to provide a mapping into DEVS and Cell‐DEVS models that can be easily executed with a simulation tool. As the modelers can focus on the problem to solve, development times for the simulators can be dramatically reduced. A front‐end system allows the user to draw city sections (and then parse the drawing to create a valid ATLAS file), and an output subsystem permitting cars to be shown with realistic 3D graphics. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
6.
Mohit Taneja Nikita Jalodia John Byabazaire Alan Davy Cristian Olariu 《Software》2019,49(7):1055-1078
Internet of Things (IoT), fog computing, cloud computing, and data-driven techniques together offer a great opportunity for verticals such as dairy industry to increase productivity by getting actionable insights to improve farming practices, thereby increasing efficiency and yield. In this paper, we present SmartHerd, a fog computing–assisted end-to-end IoT platform for animal behavior analysis and health monitoring in a dairy farming scenario. The platform follows a microservices-oriented design to assist the distributed computing paradigm and addresses the major issue of constrained Internet connectivity in remote farm locations. We present the implementation of the designed software system in a 6-month mature real-world deployment, wherein the data from wearables on cows is sent to a fog-based platform for data classification and analysis, which includes decision-making capabilities and provides actionable insights to farmer towards the welfare of animals. With fog-based computational assistance in the SmartHerd setup, we see an 84% reduction in amount of data transferred to the cloud as compared with the conventional cloud-based approach. 相似文献
7.
为了共享患者数据,更便捷地查询患者情况,电子病历成为目前医疗系统中不可或缺的数据资料。为解决医患之间细粒度的访问控制和患者隐私保护问题,提出了智慧医疗环境下的支持属性更新的加解密外包方案。该方案通过将加解密运算外包给雾节点,有效地降低了数据拥有者和数据用户的计算负担,同时提高了效率。另外,该方案支持更新患者病历,更符合实际应用情况。同时,在密文更新时,授权机构将属性相关的哈希值传输给医疗云服务器,有效地保护了用户的隐私。最后,基于DBDH困难问题证明该方案是安全的,同时实验数据分析表明,该方案在计算效率上也具有一定优势。 相似文献
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The increase in anxiety levels worldwide can be described as a serious global health threat. Around 500 million people suffer from mental disorders and are suffering from depression, and other mental-oriented disabilities. The new technological paradigms such as the Internet of Things (IoT) were employed for detecting, and treating these disorders, which are being proposed, developed, and provide new capabilities to detect, assess and care for anxious people. These possibilities lead to several issues that are identified, which relate to patient privacy and confidentiality, security challenges such as data security, and the organization of IoT systems. To rectify these issues, we implement the Smart analysis of anxious people and their activities using Heterogeneous computing with virtual sensing. This system consists of the health application featuring the technique of the internet of things, heterogeneous computing, Cognitive Quasiperiodic motion, and Pentagonal tiling. This system introduces the internet of things-assisted smart analysis of anxiety against people with their activities. It performs the optimization analysis for improving the levels. The observational results focus on how to deal with the issues which were overcome in the analysis levels of the anxiety disorders, which show that time spent using the heterogeneous computing with the virtual sense proves more accuracy (92.3%), specificity (Degrees of anxiety severity by 20%), precision (Analysis of anxiety stress level by 65%), and recall (Anxiety chances percentile by 65.34%). The proposed model is simulated, and the outcomes are compared with the prevailing methods for evaluating the parameters like accuracy, end-end-end delay, energy consumption, network lifetime, and throughput. 相似文献
9.
曹莹莹 《计算机技术与发展》2015,(1)
以中小城市中生活配套设施较为完备的社区为研究对象,设计并实现了一个以物联网技术、Web应用开发技术、云计算技术为基础的智慧社区构建方案。其中智慧社区综合信息平台的设计与开发遵循Java EE标准,利用SOA构架的思想,实现分布式应用服务,并部署在公共云平台上,以降低运维成本,增加系统的安全性与可扩展性。应用结果表明,在普及智慧生活理念、改善人民生活质量的同时,该方案优化了资源使用,提高了社区管理效率,增加了社区经济效益。 相似文献
10.
为了解决高校机房人力监管效率低、自适应调节能力差、机房能耗高等问题,通过分析高校机房监管现状,研究利用物联网对机房环境及能耗情况等进行远程自动监测;针对因物联网网络边缘设备量迅速增加而导致的泽字节（ZB）数据量,提出在高校分布式机房监测系统中应用边缘计算的方法,并提出了机房物联网的架构模型和边缘计算模型,给出了机房热环境、能耗等关键参数的监测方法。针对机房监管、测试、使用和节能服务等环节,给出了相应的解决方案,为高校节能、机房安全提供了一种新思路。 相似文献
11.
多接入边缘计算（multi-access edge computing,MEC）技术将计算和存储资源下沉到网络边缘,可大幅提高物联网（Internet of things,IoT）系统的计算能力和实时性。然而,MEC往往面临计算需求增长和能量受限的约束,高效的计算卸载及能耗优化机制是MEC技术中重要的研究领域。为保证计算效率的同时最大程度提升计算过程中的能效,提出了两级边缘节点（edge nodes,ENs）中继网络模型,并设计了一种计算资源及信道资源联合优化的最优能耗卸载策略算法（optimal energy consumption algorithm,OECA）。将MEC中的能效建模为0-1背包问题;以最小化系统总体能耗为目标,系统自适应地选择计算模式和分配无线信道资源;在Python环境下仿真验证了算法性能。仿真结果表明,相比于基于有向无环图的卸载策略算法（directed acyclic graph algorithm,DAGA）,OECA可将网络容量提升18.3%,能耗缩减13.1%。 相似文献
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Alexandre Muzy Eric Innocenti Antoine Aiello Jean-François Santucci Thierry Marcelli Paul Antoine Santoni 《International journal of systems science》2013,44(2):193-206
We deal here with the application of discrete-event System Specification (DEVS) formalism to implement a semi-physical fire spread model. Currently, models from physics finely representing forest fires are not efficient and still under development. If current softwares are devoted to the simulation of simple models of fire spread, nowadays there is no environment allowing us to model and simulate complex physical models of fire spread. Simulation models of such a type of models require being easily designed, modified and efficient in terms of execution time. DEVS formalism can be used to deal with these problems. This formalism enables the association of object-oriented hierarchical modelling with discrete-event techniques. Object-oriented hierarchical programming facilitates construction, maintenance and reusability of the simulation model. Discrete-events reduce the calculation domain to the active cells of the propagation domain (the heated ones). 相似文献
14.
G. R. Sreekanth S. Ahmed Najat Ahmed Marko Sarac Ivana Strumberger Nebojsa Bacanin Miodrag Zivkovic 《计算机系统科学与工程》2022,41(2):751-765
Fog computing provides quality of service for cloud infrastructure. As the data computation intensifies, edge computing becomes difficult. Therefore, mobile fog computing is used for reducing traffic and the time for data computation in the network. In previous studies, software-defined networking (SDN) and network functions virtualization (NFV) were used separately in edge computing. Current industrial and academic research is tackling to integrate SDN and NFV in different environments to address the challenges in performance, reliability, and scalability. SDN/NFV is still in development. The traditional Internet of things (IoT) data analysis system is only based on a linear and time-variant system that needs an IoT data system with a high-precision model. This paper proposes a combined architecture of SDN and NFV on an edge node server for IoT devices to reduce the computational complexity in cloud-based fog computing. SDN provides a generalization structure of the forwarding plane, which is separated from the control plane. Meanwhile, NFV concentrates on virtualization by combining the forwarding model with virtual network functions (VNFs) as a single or chain of VNFs, which leads to interoperability and consistency. The orchestrator layer in the proposed software-defined NFV is responsible for handling real-time tasks by using an edge node server through the SDN controller via four actions: task creation, modification, operation, and completion. Our proposed architecture is simulated on the EstiNet simulator, and total time delay, reliability, and satisfaction are used as evaluation parameters. The simulation results are compared with the results of existing architectures, such as software-defined unified virtual monitoring function and ASTP, to analyze the performance of the proposed architecture. The analysis results indicate that our proposed architecture achieves better performance in terms of total time delay (1800 s for 200 IoT devices), reliability (90%), and satisfaction (90%). 相似文献
15.
Thar Baker Muhammad Asim Áine MacDermott Farkhund Iqbal Faouzi Kamoun Babar Shah Omar Alfandi Mohammad Hammoudeh 《Software》2020,50(5):503-518
The rapid proliferation of Internet of things (IoT) devices, such as smart meters and water valves, into industrial critical infrastructures and control systems has put stringent performance and scalability requirements on modern Supervisory Control and Data Acquisition (SCADA) systems. While cloud computing has enabled modern SCADA systems to cope with the increasing amount of data generated by sensors, actuators, and control devices, there has been a growing interest recently to deploy edge data centers in fog architectures to secure low-latency and enhanced security for mission-critical data. However, fog security and privacy for SCADA-based IoT critical infrastructures remains an under-researched area. To address this challenge, this contribution proposes a novel security “toolbox” to reinforce the integrity, security, and privacy of SCADA-based IoT critical infrastructure at the fog layer. The toolbox incorporates a key feature: a cryptographic-based access approach to the cloud services using identity-based cryptography and signature schemes at the fog layer. We present the implementation details of a prototype for our proposed secure fog-based platform and provide performance evaluation results to demonstrate the appropriateness of the proposed platform in a real-world scenario. These results can pave the way toward the development of a more secure and trusted SCADA-based IoT critical infrastructure, which is essential to counter cyber threats against next-generation critical infrastructure and industrial control systems. The results from the experiments demonstrate a superior performance of the secure fog-based platform, which is around 2.8 seconds when adding five virtual machines (VMs), 3.2 seconds when adding 10 VMs, and 112 seconds when adding 1000 VMs, compared to the multilevel user access control platform. 相似文献
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Sreenivasu Mirampalli Satish Narayana Srirama Rajeev Wankar Raghavendra Rao Chillarige 《Software》2023,53(2):263-282
Fog computing or a fog network is a decentralized network placed in between data source and the cloud to minimize the network latency issues and thus support in-time service delivery, of Internet of Things (IoT) applications. However, placing computational tasks of IoT applications in fog infrastructure is a challenging task. State of the art focuses on quality of service and quality of experience (QoE) based application placement. In this article, we design hierarchical fuzzy based QoE-aware application placement strategy for mapping IoT applications with compatible instances in the fog network. The proposed method considers user application expectation parameters and metrics of available fog instances, and assigns the priority of applications using hierarchical fuzzy logic. The method later uses Hungarian maximization assignment algorithm to map applications with compatible instances. The simulation results of the proposed policy show better performance over the existing baseline algorithms in terms of resource gain (RG), processing time reduction ratio (PTRR), and similarly network relaxation ratio. When considering 10 applications in the fog network, our proposed method simulation results show 70.00%, 22.44%, 37.83% improvement in RG, and 28.46%, 37.5%, 23.07% improvement in PTRR, when compared with QoE-aware, randomized, FIFO algorithms, respectively. 相似文献
17.
通过MyEclipse10.0和SQL Server 2008开发了一个建筑能耗监控平台,系统采用Java语言的JDBC数据库访问技术,SQL Server 2008数据库语言以及Java语言中的图形化库等,实时更新显示能耗数据,并对数据进行分析和管理,有效地实现了监控的目的。 相似文献
18.
Bushra Jamil Mohammad Shojafar Israr Ahmed Atta Ullah Kashif Munir Humaira Ijaz 《Concurrency and Computation》2020,32(7)
Due to an ever‐increasing number of Internet of Everything (IoE) devices, massive amounts of data are produced daily. Cloud computing offers storage, processing, and analysis services for handling of such large quantities of data. The increased latency and bandwidth consumption is not acceptable to real‐time applications like online gaming, smart health, video surveillance, etc. Fog computing has emerged to overcome the increase in latency and bandwidth consumption in Cloud computing. Fog Computing provides storage, processing, networking, and analytical services at the edge of a network. As Fog Computing is still in its infancy, its significant challenges include resource‐allocation and job‐scheduling. The Fog devices at the edge of the network are resource‐constrained. Therefore, it is important to decide the assignment and scheduling of a job on a Fog node. An efficient job scheduling algorithm can reduce energy consumption and response time of an application request. In this paper, we propose a novel Fog computing scheduler that supports service‐provisioning for Internet of Everything, which optimizes delay and network usage. We present a case study to optimally schedule the requests of Internet of Everything devices on Fog devices and efficiently address their demands on available resources on every Fog device. We consider delay and energy consumption as performance metrics and evaluate the proposed scheduling algorithm using iFogSim in comparison with existing approaches. The results show that the delay and network usage of the proposed scheduler improve by 32% and 16%, respectively, in comparison with FCFS approach. 相似文献
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为了适应数据规模大、响应要求快的智慧能源场景,提出了一种基于消息队列遥测传输(Message Queuing Telemetry Transport,MQTT)消息传输和(Improved Lempel-Ziv4,ILZ4)压缩法的智慧能源云平台。在物联网与云平台之间的数据通信中引入了MQTT协议,设计了基于MQTT协议的消息队列架构和消息流的上传/下载过程,利用引入的ILZ4压缩法可集成到信息存储和消息传输任务中,实现大规模监测信息流的实时压缩和传输。300万个监测数据点作为云服务器的测试数据流进行实验,实验结果表明,所提方法在吞吐量和压缩比性能上更优,从而可快速降低大规模数据的存储成本和传输开销,同时,所提平台为智慧能源应用提供一种良好、通用和可扩展的解决方案。 相似文献