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NOMS 2018 - 2018 IEEE/IFIP Network Operations and Management Symposium最新文献

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A green VNFs placement and chaining algorithm 一个绿色的VNFs放置和链接算法
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406183
Oussama Soualah, Marouen Mechtri, Chaima Ghribi, D. Zeghlache
This paper proposes an Integer Linear Program (ILP) to address Virtualized Network Function Forwarding Graph (VNF-FG) placement and chaining with Virtualized Network Functions (VNFs) shared across tenants to optimize resource usage and increase provider revenue. The proposed algorithm selects a limited number of candidate hosts from the infrastructure to reduce the complexity of the ILP and scale with problem size. Results from extensive simulations report performance improvements in terms of rejection rate, energy consumption and scalability. Limiting the number of candidates is an efficient heuristic to ensure scalability.
本文提出了一种整数线性规划(ILP)来解决虚拟网络功能转发图(VNF-FG)的放置和跨租户共享的虚拟网络功能(VNFs)的链接,以优化资源使用并增加提供商收入。该算法从基础设施中选择有限数量的候选主机,以降低ILP的复杂性,并随问题规模而扩展。广泛的模拟结果报告了在拒弃率、能耗和可扩展性方面的性能改进。限制候选对象的数量是确保可伸缩性的有效启发式方法。
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引用次数: 8
IP/NDN: A multi-level translation and migration mechanism IP/NDN:多层次的转换和迁移机制
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406213
Sheng Luo, Shangru Zhong, Kai Lei
Different from TCP/IP architecture, Named Data Networking (NDN) adopts a data-centric and in-network caching approach to achieve improved network efficiency and reduced traffic redundancy. As NDN begins to incrementally deploy on the real-world, there will be a hybrid network of TCP/IP and NDN during the transitional period. However, redeveloping TCP/IP- based applications for NDN is a daunting and time-consuming task. Thus, a more sensible and economical approach is to design an effective strategies for leveraging NDN to deliver IP datagrams and porting TCP/IP-based applications on NDN without chang­ing its original code. Towards this end, this paper introduces three different migration methods at Internet layer, TCP layer and application layer, respectively to translate TCP/IP-based packets into NDN packets and run TCP/IP-based applications on NDN. By implementing these methods on a real NDN test-bed, we demonstrate the multi-level IP/NDN translation and migration mechanism is feasible. The analysis of testing results shows that each of the proposed methods is valid with varying benefits and costs: translating at TCP layer with more time overhead can have a less packets overhead than Internet layer. And when translated at application layer, the network load is reduced by half because of the in-network cache.
与TCP/IP架构不同,NDN (Named Data Networking)采用以数据为中心的网内缓存方式,提高网络效率,减少流量冗余。随着NDN在现实世界中的逐步部署,过渡时期将出现TCP/IP和NDN的混合网络。然而,为NDN重新开发基于TCP/IP的应用程序是一项艰巨而耗时的任务。因此,一个更明智和经济的方法是设计一个有效的策略,利用NDN来传递IP数据报,并在NDN上移植基于TCP/IP的应用程序,而不改变其原始代码。为此,本文分别在互联网层、TCP层和应用层介绍了三种不同的迁移方法,将基于TCP/ ip的数据包转换为NDN数据包,并在NDN上运行基于TCP/ ip的应用程序。通过在实际的NDN测试平台上实现这些方法,我们证明了多级IP/NDN转换和迁移机制是可行的。对测试结果的分析表明,每种方法都是有效的,并且具有不同的收益和成本:在时间开销较大的TCP层进行转换可以比Internet层进行转换获得更少的数据包开销。当在应用层进行转换时,由于网络内缓存,网络负载减少了一半。
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引用次数: 8
AP selection algorithm based on a potential game for large IEEE 802.11 WLANs 基于潜在博弈的大型IEEE 802.11 wlan AP选择算法
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406147
A. Raschellà, F. Bouhafs, M. Mackay, Q. Shi, J. Ortín, J. Gállego, M. Canales
This paper presents a novel Access Point (AP) selection strategy based on a potential game played at a centralized controller. The proposed approach relies on Software Defined Networking (SDN), which has long been considered in the literature as a method to control management functionalities for Wi-Fi networks. The use of SDN provides a global view of the network, which guarantees an efficient distribution of Wi-Fi users among the APs. The centralized potential game proposed in this paper is based on the Fittingness Factor (FF) concept, which is a metric reflecting the suitability of the available spectrum resources to the application requirements. This paper describes the development of a new SDN-based framework that implements the potential game-based algorithm relying on the FF for efficient AP selection. The simulation campaign illustrates the important gains, both in terms of data rates assigned to the Wi-Fi users and their satisfaction compared against the AP selection suggested by the IEEE 802.11 standards and another algorithm proposed in the literature.
本文提出了一种基于集中式控制器潜在博弈的接入点选择策略。所提出的方法依赖于软件定义网络(SDN),这在文献中一直被认为是一种控制Wi-Fi网络管理功能的方法。使用SDN提供了网络的全局视图,从而保证了Wi-Fi用户在ap之间的有效分配。本文提出的集中式势博弈基于适配系数(FF)概念,FF是反映可用频谱资源对应用需求适配性的度量。本文描述了一种新的基于sdn的框架的开发,该框架实现了依赖于FF的基于博弈的潜在算法,以实现高效的AP选择。模拟活动说明了分配给Wi-Fi用户的数据速率以及与IEEE 802.11标准建议的AP选择和文献中提出的另一种算法相比的满意度方面的重要收益。
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引用次数: 9
Introducing network slice management inside M-CORD-based-5G framework 介绍了基于m - cord的5g框架下的网络切片管理
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406113
Muhammad Tahir Abbas, T. Khan, Asif Mahmood, Javier Jose Diaz Rivera, Wang-Cheol Song
Network slicing has been considered as one of the fundamental technologies in the fifth generation (5G) mobile networks. Slicing mechanism enables virtual networks while providing customized services on demand. There are several papers attempting to narrow down the architectural requirement for 5G networks. Many of them consider the aspect of slice creation as a central point, sometimes strengthening slices with slice isolation. The aim of this paper is to focus more on network slice management, slicing of transport network (TN) and challenges to elaborate technological options and enablers, irrespective of the slicing mechanism. Our proposed framework creates, manages and associates the slice to user equipment (UE) upon the request made by different applications. Proposed framework exploits the key features offered by CORD including OpenStack and ONOS as well as modules based on M-CORD such as vBBU, NSSF and vEPC for establishing a network slice scenario.
网络切片被认为是第五代(5G)移动网络的基础技术之一。切片机制在实现虚拟网络的同时,可按需提供定制服务。有几篇论文试图缩小5G网络的架构要求。它们中的许多都将切片创建方面视为中心点,有时用切片隔离来加强切片。本文的目的是更多地关注网络切片管理,传输网络切片(TN)以及复杂的技术选择和使能因素的挑战,而不考虑切片机制。我们提出的框架根据不同应用程序的请求创建、管理和关联切片到用户设备(UE)。该框架利用了CORD提供的OpenStack、ONOS等关键特性,以及基于M-CORD的vBBU、NSSF、vEPC等模块构建网络切片场景。
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引用次数: 14
JOX: An event-driven orchestrator for 5G network slicing JOX:用于5G网络切片的事件驱动编排器
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406236
Kostas Katsalis, N. Nikaein, A. Huang
Network slicing is expected to be the main pillar around which virtualization technologies together with SDN control and NFV, will provide on-demand network and cloud infrastructures and facilitate rapid service deployment. In this paper we present JOX, an event-driven orchestrator for the virtu- alized network, operating on top of the Juju management system, that inherently supports network slicing. JOX is a python-based generic network slicing orchestrator, with a plugins architecture that is able to support different segments of a modern mobile edge network. We present a concrete prototype implementation of JOX for LTE, with experimental results considering footprint analysis, performance metrics, and implementation experience for slicing and orchestrating of an operational LTE network.
网络切片有望成为虚拟化技术与SDN控制和NFV一起提供按需网络和云基础设施并促进快速业务部署的主要支柱。在本文中,我们提出了一个事件驱动的虚拟网络编排器JOX,它运行在Juju管理系统之上,固有地支持网络切片。JOX是一个基于python的通用网络切片编排器,其插件架构能够支持现代移动边缘网络的不同部分。我们提出了一个用于LTE的JOX的具体原型实现,实验结果考虑了占用分析、性能指标以及用于切片和编排可操作LTE网络的实现经验。
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引用次数: 26
Integrating network management information into the SDN control plane 将网管信息集成到SDN控制平面
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406228
Stanislav Lange, Lorenz Reinhart, T. Zinner, D. Hock, N. Gray, P. Tran-Gia
With software defined networking (SDN), operators benefit from a higher flexibility, cost efficiency, as well as programmability of their networks. Since modern networks are comprised of a multitude of heterogeneous devices and also include non-SDN legacy devices, network management systems (NMSs) are often used in order to monitor and configure the network. Although both, the SDN controller and the NMS, have a centralized view of the network, they operate at different time scales and deal with information at different levels of granularity. In this work, we investigate the impact on the network performance when an NMS regularly provides information to an SDN controller. To this end, we design, implement, and compare three interaction mechanisms based on the ONOS controller. These represent different trade-offs regarding the complexity of the resulting system and its performance. In addition to the default ONOS controller, we develop two extended versions. One performs hash-based load balancing on equal cost paths while the other utilizes external NMS information via ONOS's intent and annotation framework to optimize control plane decisions. In addition to evaluations that show a significant performance improvement when using the optimized controllers, we present a parameter study that highlights the performance impact of network characteristics like the flow interarrival time, the flow duration, and the number of active flows.
通过软件定义网络(SDN),运营商可以从其网络的更高灵活性、成本效率和可编程性中受益。由于现代网络由大量异构设备组成,还包括非sdn遗留设备,因此经常使用网络管理系统(nms)来监视和配置网络。尽管SDN控制器和NMS都有一个集中的网络视图,但它们在不同的时间尺度上运行,处理不同粒度级别的信息。在这项工作中,我们研究了当NMS定期向SDN控制器提供信息时对网络性能的影响。为此,我们设计、实现并比较了三种基于ONOS控制器的交互机制。它们代表了关于结果系统的复杂性及其性能的不同权衡。除了默认的ONOS控制器之外,我们还开发了两个扩展版本。其中一个在等成本路径上执行基于哈希的负载平衡,而另一个通过ONOS的意图和注释框架利用外部NMS信息来优化控制平面决策。除了在使用优化控制器时显示显着性能改进的评估之外,我们还提出了一个参数研究,强调了网络特征(如流间隔到达时间、流持续时间和活动流数量)对性能的影响。
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引用次数: 2
Improving network flow definition: Formalization and applicability 改进网络流定义:形式化和适用性
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406203
P. Velan
Network flow monitoring has been used for more than 20 years and has become an important part of network accounting and security. A significant effort was invested into the standardization of flow monitoring by the Internet Engineering Task Force (IETF). The flow monitoring has steadily evolved to satisfy new requirements created by the demand for increased visibility and accuracy. Therefore, it is not surprising that even the most recent flow definition created by the IETF does not consider several specifics of the flow monitoring process as it is used nowadays. This paper presents a revised flow definition that is more generic and is designed to accommodate more specific flow monitoring requirements. Moreover, we formalize our definition to avoid ambiguity and imprecision introduced by the use of natural language. One additional benefit of formalizing the flow definition is that it implicitly describes the flow creation process as well.
网络流量监控已经使用了20多年,已经成为网络会计和安全的重要组成部分。Internet工程任务组(IETF)在流量监控的标准化方面投入了大量精力。流量监测已经稳步发展,以满足增加可视性和准确性的需求所产生的新要求。因此,即使是由IETF创建的最新流量定义也没有考虑到当前使用的流量监控过程的几个细节,这并不奇怪。本文提出了一个修订的流量定义,它更通用,旨在适应更具体的流量监测要求。此外,我们将我们的定义形式化,以避免使用自然语言带来的歧义和不精确。形式化流定义的另一个好处是,它也隐式地描述了流创建过程。
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引用次数: 2
Deploying a multi-tier heterogeneous cloud: Experiences and lessons from the SAVI testbed 部署多层异构云:来自SAVI测试平台的经验和教训
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406140
Thomas Lin, Byungchul Park, H. Bannazadeh, A. Leon-Garcia
The SAVI testbed is a multi-tier SDN-enabled het-erogeneous cloud created as an application enablement platform for academic research. It was developed to investigate the hypothesis that the entire infrastructure can be virtualized and abstracted as a service. Key to this investigation was the creation of a resource management system based on the concept of Software-Defined Infrastructure (SDI), which enables integrated control and management over heterogeneous resources and exposes a programmable interface for users. In this paper, we present our experiences in designing and deploying the Canadian national SAVI testbed, and discuss the various lessons learned along the way. In addition, we describe our ongoing work to enhance the testbed management system to meet the demands and challenges of the IoT era.
SAVI测试平台是一个支持sdn的多层异构云,是为学术研究创建的应用程序支持平台。它的开发是为了研究整个基础设施可以被虚拟化和抽象为服务的假设。该调查的关键是基于软件定义基础设施(SDI)概念的资源管理系统的创建,该系统支持对异构资源的集成控制和管理,并为用户提供可编程接口。在本文中,我们介绍了我们在设计和部署加拿大国家SAVI测试平台方面的经验,并讨论了在此过程中获得的各种经验教训。此外,我们描述了我们正在进行的工作,以增强测试平台管理系统,以满足物联网时代的需求和挑战。
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引用次数: 6
Optimization on parametric model 参数化模型的优化
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406287
Fenfen Huang, Wenbin Yao
Neural networks are both computationally intensive and memory intensive, making them difficult to deploy on embedded systems with large number of weights consume considerable storage and memory bandwidth. To address this limitation, prun­ing is an effective way to compress neural networks with high accuracy. To address this limitation, we proposed a method for optimization on parametric model. This method contains three steps. First, we train the network like conventional training. Next, we prune the unimportant connections and retrain the network to get the sparse weight matrix. Finally, we use Singularly Valuable Decomposition (SVD) to do further compression on the sparse weight matrix. Our experiments on MNIST dataset show that our method has the ability on reducing the model size by 4 times and the accuracy could still be kept over 90%.
神经网络是计算密集型和内存密集型的,这使得它们很难部署在大量权重消耗大量存储和内存带宽的嵌入式系统上。为了解决这一限制,修剪是一种有效的压缩神经网络的方法。为了解决这一问题,我们提出了一种基于参数模型的优化方法。该方法包含三个步骤。首先,我们像传统训练一样训练网络。接下来,我们修剪不重要的连接并重新训练网络以得到稀疏权矩阵。最后,利用奇异值分解(SVD)对稀疏权矩阵进行进一步压缩。我们在MNIST数据集上的实验表明,我们的方法能够将模型尺寸缩小4倍,并且准确率仍然保持在90%以上。
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引用次数: 0
Anomaly detection for Smart City applications over 5G low power wide area networks 基于5G低功耗广域网的智慧城市应用异常检测
Pub Date : 2018-04-23 DOI: 10.1109/NOMS.2018.8406257
José Santos, P. Leroux, T. Wauters, B. Volckaert, F. Turck
In recent years, the Internet of Things (IoT) has introduced a whole new set of challenges and opportunities in Telecommunications. Traffic over wireless networks has been increasing exponentially since many sensors and everyday devices are being connected. Current networks must therefore adapt to and cope with the specific requirements introduced by IoT. One fundamental need of the next generation networked systems is to monitor IoT applications, especially those dealing with personal health monitoring or emergency response services, which have stringent latency requirements when dealing with malfunctions or unusual events. Traditional anomaly detection approaches are not suitable for delay-sensitive IoT applications since these approaches are significantly impacted by latency. With the advent of 5G networks and by exploiting the advantages of new paradigms, such as Software-Defined Networking (SDN), Network Function Virtualization (NFV) and edge computing, scalable, low-latency anomaly detection becomes feasible. In this paper, an anomaly detection solution for Smart City applications is presented, focusing on low-power Fog Computing solutions and evaluated within the scope of Antwerp's City of Things testbed. Based on a collected large dataset, the most appropriate Low Power Wide Area Network (LPWAN) technologies for our Smart City use case are investigated.
近年来,物联网(IoT)为电信业带来了一系列全新的挑战和机遇。由于许多传感器和日常设备被连接起来,无线网络上的流量呈指数级增长。因此,当前的网络必须适应和应对物联网引入的特定要求。下一代网络系统的一个基本需求是监控物联网应用,特别是那些处理个人健康监测或应急响应服务的应用,这些应用在处理故障或异常事件时具有严格的延迟要求。传统的异常检测方法不适合延迟敏感的物联网应用,因为这些方法受到延迟的显著影响。随着5G网络的到来,通过利用软件定义网络(SDN)、网络功能虚拟化(NFV)和边缘计算等新范式的优势,可扩展、低延迟的异常检测变得可行。本文提出了一种用于智慧城市应用的异常检测解决方案,重点关注低功耗雾计算解决方案,并在安特卫普的物联网城市试验台范围内进行了评估。基于收集的大型数据集,研究了最适合我们智慧城市用例的低功耗广域网(LPWAN)技术。
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引用次数: 48
期刊
NOMS 2018 - 2018 IEEE/IFIP Network Operations and Management Symposium
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