scholarly journals A Network Measurement System for NFV Networks based on SDN

2021 ◽  
Vol 10 (2) ◽  
pp. 1300-1304
Keyword(s):  
Measurement System ◽  
Network Performance ◽  
Network Measurement ◽  
Network Function Virtualization ◽  
Test Results ◽  
Network Function ◽  
Measurement Framework ◽  
Description File ◽  
Measurement Function ◽  
And Control

As a promising innovation to totally change how we design, install and oversee different organizations, Software-based Network Function Virtualization (NFV) empowers hardware-free, adaptable, quickand proficient network service process. With the expanding prevalence of NFV, the Internet has likewise changed to be a hybrid environment where NFV-based network exists together with traditional gadgets. To ease our understanding, plan, assess and handling of such novel organization environment, there is an incredible requirement for new NFV-compatible measurement framework which is still missing till now. To overcome this issue, a framework, named Software Defined Network Measurement System (SDNMS) is introduced. First the architecture of SDNMS is proposed. In this design, a conventional strategy to portray the working method of the network measurement is defined. This technique can likewise be used to produce network measurement middle box (NMMB) in a particular location of the NFV network as per the customized description file, and to flexibly install the network measurement function. Besides, the innovation of virtual network measurement function (VNMF) joined with LXC is said to be shape NMMB function.Thirdly, a control strategy is introduced to control the beginning, stop, and update NMMB to produce a particular network measurement system. At last, a model of SDNMS with network observing function to screen network performance anomalies and locate fault is presented. Test results have shown that SDNMS design and related advancements are practical and successful to launch and control network measurement functions in NFV network. We trust SDNMS could give another strategy to experts to do network management and examine at the age of NFV

scholarly journals Virtual Networking Performance in OpenStack Platform for Network Function Virtualization

2016 ◽  
Vol 2016 ◽  
pp. 1-15 ◽  
Author(s):  
Franco Callegati ◽  
Walter Cerroni ◽  
Chiara Contoli
Keyword(s):  
Cloud Computing ◽  
Network Performance ◽  
Network Virtualization ◽  
Network Function Virtualization ◽  
Network Architectures ◽  
Cloud Data ◽  
Network Function ◽  
Computing Platform ◽  
Central Offices ◽  
The One

The emerging Network Function Virtualization (NFV) paradigm, coupled with the highly flexible and programmatic control of network devices offered by Software Defined Networking solutions, enables unprecedented levels of network virtualization that will definitely change the shape of future network architectures, where legacy telco central offices will be replaced by cloud data centers located at the edge. On the one hand, this software-centric evolution of telecommunications will allow network operators to take advantage of the increased flexibility and reduced deployment costs typical of cloud computing. On the other hand, it will pose a number of challenges in terms of virtual network performance and customer isolation. This paper intends to provide some insights on how an open-source cloud computing platform such as OpenStack implements multitenant network virtualization and how it can be used to deploy NFV, focusing in particular on packet forwarding performance issues. To this purpose, a set of experiments is presented that refer to a number of scenarios inspired by the cloud computing and NFV paradigms, considering both single tenant and multitenant scenarios. From the results of the evaluation it is possible to highlight potentials and limitations of running NFV on OpenStack.

scholarly journals Energy-Efficient Virtual Network Function Reconfiguration Strategy Based on Short-Term Resources Requirement Prediction

Electronics ◽  
2021 ◽  
Vol 10 (18) ◽  
pp. 2287
Author(s):  
Yanyang Liu ◽  
Jing Ran ◽  
Hefei Hu ◽  
Bihua Tang
Keyword(s):  
Energy Efficient ◽  
Network Performance ◽  
Service Level Agreement ◽  
Service Level ◽  
Network Function Virtualization ◽  
Short Term ◽  
Resource Requirement ◽  
Resource Demand ◽  
Network Function ◽  
Save Energy

In Network Function Virtualization, the resource demand of the network service evolves with the change of network traffic. VNF dynamic migration has become an effective method to improve network performance. However, for the time-varying resource demand, how to minimize the long-term energy consumption of the network while guaranteeing the Service Level Agreement (SLA) is the key issue that lacks previous research. To tackle this dilemma, this paper proposes an energy-efficient reconfiguration algorithm for VNF based on short-term resource requirement prediction (RP-EDM). Our algorithm uses LSTM to predict VNF resource requirements in advance to eliminate the lag of dynamic migration and determines the timing of migration. RP-EDM eliminates SLA violations by performing VNF separation on potentially overloaded servers and consolidates low-load servers timely to save energy. Meanwhile, we consider the power consumption of servers when booting up, which is existing objectively, to avoid switching on/off the server frequently. The simulation results suggest that RP-EDM has a good performance and stability under machine learning models with different accuracy. Moreover, our algorithm increases the total service traffic by about 15% while ensuring a low SLA interruption rate. The total energy cost is reduced by more than 20% compared with the existing algorithms.

A Centrifugal Analyzer with a New All-Digital Measurement System

1974 ◽  
Vol 20 (8) ◽  
pp. 942-949 ◽  
Author(s):  
J Avery ◽  
R P Gregory ◽  
B W Renoe ◽  
T Woodruff ◽  
H V Malmstadt
Keyword(s):  
Measurement System ◽  
Dynamic Range ◽  
Radiation Detector ◽  
Digital Measurement ◽  
Test Results ◽  
Integration Period ◽  
Basic Measurement ◽  
New Type ◽  
Control Devices ◽  
And Control

Abstract An accurate, all-digital measurement system has been developed for use in a centrifugal analyzer system. The output of the radiation detector is converted directly to a digital count by a new type of charge-to-count converter. The converter is characterized by exceptional linearity and stability, and has a wide dynamic range. A gating and counting unit integrates the output of the charge-to-count converter and simultaneously measures the period of integration. The integration effectively discriminates against noise and allows an optimum amount of information to be extracted from the signal during the measurement period. Measurement of the integration period reduces requirements for synchronization and control devices, thus simplifying overall analyzer design. Control and data manipulation functions are performed by a minicomputer. The programs were written in OS/8 FORTRAN. The basic measurement principles of the new system and test results are described.

scholarly journals Service Function Chain Placement in Distributed Scenarios: a Systematic Review

2021 ◽  
Author(s):  
Guto Leoni Santos ◽  
Diego de Freitas Bezerra ◽  
Élisson da Silva Rocha ◽  
Leylane Ferreira ◽  
André Moreira ◽  
...  
Keyword(s):  
Systematic Review ◽  
Network Performance ◽  
Network Function Virtualization ◽  
Service Function ◽  
Network Function ◽  
Network Flexibility ◽  
Specific Order ◽  
Service Function Chain ◽  
Network Functions ◽  
Traffic Oscillations

Abstract The network function virtualization (NFV) paradigm is an emerging technology that provides network flexibility by allowing the allocation of network functions over commodity hardware, like legacy servers in an IT infrastructure. In comparison with traditional network functions, implemented by dedicated hardware, the use of NFV reduces the operating and capital expenses and improves service deployment. In some scenarios, a complete network service can be composed of several functions, following a specific order, known as a service function chain (SFC). SFC placement is a complex task, already proved to be NP-hard. Moreover, in highly distributed scenarios, the network performance can also be impacted by other factors, such as traffic oscillations and high delays. Therefore, a given SFC placement strategy must be carefully developed to meet the network operator service constraints. In this paper, we present a systematic review of SFC placement advances in distributed scenarios. Differently from the current literature, we examine works over the last 10 years which addressed this problem while focusing on distributed scenarios. We then discuss the main scenarios where SFC placement has been deployed, as well as the several techniques used to create the placement strategies. We also present the main goals considered to create SFC placement strategies and highlight the metrics used to evaluate them.

Application of Performance Baseline in Network Measurement

2010 ◽  
Vol 29-32 ◽  
pp. 1193-1198
Author(s):  
Xi Jiong Jiang ◽  
Hong Qi Feng
Keyword(s):  
Performance Measurement ◽  
Performance Indicators ◽  
Network Performance ◽  
Process Management ◽  
Network Measurement ◽  
Management Model ◽  
Baseline Measurement ◽  
Production Network ◽  
Ip Network ◽  
And Control

This document analyzes characteristics of IP network measurement and common network performance indicators, and proposes the measurement guide of baseline theory aiming at traditional network measurement that focuses on measurement result and neglects process management and control. The article normalizes network performance baseline measurement, describes network performance baseline setting, designs baseline measurement management model, and optimizes and improves network performance measurement program by taking throughput baseline measurement in production network performance measurement as example.

scholarly journals Orchestration and Control in Software-Defined 5G Networks: Research Challenges

2018 ◽  
Vol 2018 ◽  
pp. 1-18 ◽  
Author(s):  
Gianfranco Nencioni ◽  
Rosario G. Garroppo ◽  
Andres J. Gonzalez ◽  
Bjarne E. Helvik ◽  
Gregorio Procissi
Keyword(s):  
Access Network ◽  
Network Function Virtualization ◽  
Future Research ◽  
Major Step ◽  
Core Networks ◽  
Network Function ◽  
Research Challenges ◽  
Radio Access ◽  
Cost Efficient ◽  
And Control

The fifth generation (5G) of cellular networks promises to be a major step in the evolution of wireless technology. 5G is planned to be used in a very broad set of application scenarios. These scenarios have strict heterogeneous requirements that will be accomplished by enhancements on the radio access network and a collection of innovative wireless technologies. Softwarization technologies, such as Software-Defined Networking (SDN) and Network Function Virtualization (NFV), will play a key role in integrating these different technologies. Network slicing emerges as a cost-efficient solution for the implementation of the diverse 5G requirements and verticals. The 5G radio access and core networks will be based on a SDN/NFV infrastructure, which will be able to orchestrate the resources and control the network in order to efficiently and flexibly and with scalability provide network services. In this paper, we present the up-to-date status of the software-defined 5G radio access and core networks and a broad range of future research challenges on the orchestration and control aspects.

scholarly journals Towards an SI-Traceable Reference Measurement System for Seven Serum Apolipoproteins Using Bottom-Up Quantitative Proteomics: Conceptual Approach Enabled by Cross-Disciplinary/Cross-Sector Collaboration

2020 ◽  
Author(s):  
Christa M Cobbaert ◽  
Harald Althaus ◽  
Ilijana Begcevic Brkovic ◽  
Uta Ceglarek ◽  
Stefan Coassin ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Cardiovascular Disease ◽  
Measurement System ◽  
Protein Quantification ◽  
Test Results ◽  
Conceptual Approach ◽  
Reference Measurement ◽  
Lipid Panel ◽  
Mass Spectrometry Technology ◽  
Reference Measurement System

Abstract Current dyslipidemia management in patients with atherosclerotic cardiovascular disease (ASCVD) is based on traditional serum lipids. Yet, there is some indication from basic research that serum apolipoproteins A-I, (a), B, C-I, C-II, C-III, and E may give better pathophysiological insight into the root causes of dyslipidemia. To facilitate the future adoption of clinical serum apolipoprotein (apo) profiling for precision medicine, strategies for accurate testing should be developed in advance. Recent discoveries in basic science and translational medicine set the stage for the IFCC Working Group on Apolipoproteins by Mass Spectrometry. Main drivers were the convergence of unmet clinical needs in cardiovascular disease (CVD) patients with enabling technology and metrology. First, the residual cardiovascular risk after accounting for established risk factors demonstrates that the current lipid panel is too limited to capture the full complexity of lipid metabolism in patients. Second, there is a need for accurate test results in highly polymorphic and atherogenic apolipoproteins such as apo(a). Third, sufficient robustness of mass spectrometry technology allows reproducible protein quantification at the molecular level. Fourth, several calibration hierarchies in the revised ISO 17511:2020 guideline facilitate metrological traceability of test results, the highest achievable standard being traceability to SI. This article outlines the conceptual approach aimed at achieving a novel, multiplexed Reference Measurement System (RMS) for seven apolipoproteins based on isotope dilution mass spectrometry and peptide-based calibration. This RMS should enable standardization of existing and emerging apolipoprotein assays to SI, within allowable limits of measurement uncertainty, through a sustainable network of Reference Laboratories.

scholarly journals Using Aerial and Vehicular NFV Infrastructures to Agilely Create Vertical Services

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1342
Author(s):  
Borja Nogales ◽  
Miguel Silva ◽  
Ivan Vidal ◽  
Miguel Luís ◽  
Francisco Valera ◽  
...  
Keyword(s):  
Ad Hoc Network ◽  
Ad Hoc ◽  
Cost Effective ◽  
Network Services ◽  
Network Function Virtualization ◽  
Mobile Environments ◽  
Network Resources ◽  
The Public ◽  
Network Function ◽  
And Performance

5G communications have become an enabler for the creation of new and more complex networking scenarios, bringing together different vertical ecosystems. Such behavior has been fostered by the network function virtualization (NFV) concept, where the orchestration and virtualization capabilities allow the possibility of dynamically supplying network resources according to its needs. Nevertheless, the integration and performance of heterogeneous network environments, each one supported by a different provider, and with specific characteristics and requirements, in a single NFV framework is not straightforward. In this work we propose an NFV-based framework capable of supporting the flexible, cost-effective deployment of vertical services, through the integration of two distinguished mobile environments and their networks: small sized unmanned aerial vehicles (SUAVs), supporting a flying ad hoc network (FANET) and vehicles, promoting a vehicular ad hoc network (VANET). In this context, a use case involving the public safety vertical will be used as an illustrative example to showcase the potential of this framework. This work also includes the technical implementation details of the framework proposed, allowing to analyse and discuss the delays on the network services deployment process. The results show that the deployment times can be significantly reduced through a distributed VNF configuration function based on the publish–subscribe model.

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