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Current status of development of network virtualization technologies

NTT Technical Review 2014年第8期12卷 1-5页

作者： Arimitsu, Hidehiro Matsumoto, Kimihide Matsubayashi, Yasunori Aihara, Masao Makibayashi, Yasuo Kojima, Hisashi Kosugi, Tomoya Waseda University Tokyo Japan Nagoya Institute of Technology Japan Meiji University Tokyo Japan Nagoya University Japan Keio University Tokyo Japan

NTT laboratories have been active in researching and developing network virtualization technology as a key technology of future networks, which will be next-generation carrier networks. In this article, we outline the carrier network architecture, focusing specifically on the network virtualization technology implemented in it. We also introduce the research on elemental technologies being conducted by NTT laboratories.

关键词： network function virtualization

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Service function chaining technology for future networks

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NTT Technical Review 2014年第8期12卷 1-5页

作者： Kitada, Hiroyuki Kojima, Hisashi Takaya, Naoki Aihara, Masao Shibaura Institute of Technology Saitama Japan Waseda University Tokyo Japan NTT Network Service Systems Laboratories Japan

Service function chaining enables various network functions to be used rapidly and flexibly. This article describes methods of implementing service function chaining technology and also presents use cases.

关键词： network function virtualization

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Towards Real-time Management of Virtualized Telecommunication networks 10

Towards Real-time Management of Virtualized Telecommunicatio...

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10th International Conference on network and Service Management (CNSM)

作者： Keeney, John van der Meer, Sven Fallon, Liam Ericsson Network Management Lab Athlone Westmeath Ireland

ISBN: (纸本)9783901882678

The idea of virtualizing network functions is driven by recent advances in network-focused hardware. In 2012, several large telecommunication operators issued a call to action for network function virtualization (NFV)(1). The underlying idea is that every network service currently delivered on proprietary, application specific hardware should be deliverable using virtual machines. This means that routers, firewalls, load balancers and other network devices run virtualized on commodity hardware. Consequently, ETSI is extending this idea to mobile networks. Here, parts of the core and the radio access network will be virtualized. The immediate advantage is that any Virtual network function (VNF) can now be deployed, re-deployed and undeployed in the same way as any traditional virtual machine. Thus, NFV will result in more dynamic and agile networks than seen heretofore. However, this will raise a number of serious issues in managing these future networks. In this paper, we examine issues and challenges in orchestrating these virtualized functions and their interconnections to provide a more agile mobile telecommunication network.

关键词： firewalls mobile communication resource allocation telecommunication computing telecommunication network management telecommunication network routing virtual machines virtualisation ETSI NFV VNF agile mobile telecommunication network commodity hardware load balancers network function virtualization network-focused hardware real-time virtualized telecommunication network management routers telecommunication operators virtual network function Hardware Home appliances Mobile communication Mobile computing Monitoring virtualization

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network function Placement for NFV Chaining in Packet/Optical Data Centers

Network Function Placement for NFV Chaining in Packet/Optica...

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European Conference on Optical Communication (ECOC)

作者： Xia, Ming Shirazipour, Meral Zhang, Ying Green, Howard Takacs, Attila Ericsson Res Silicon Valley San Jose CA USA

Intelligent network function (NF) placement can minimize optical/electrical/optical (O/E/O) conversions for NF chaining in packet/optical data centers hosting NF virtualization (NFV). We design an efficient algorithm ... 详细信息

ISBN: (纸本)9782954944401

关键词： network function virtualization

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Adaptive SLA-based Elasticity Management Algorithms for a Virtualized IP Multimedia Subsystem

Adaptive SLA-based Elasticity Management Algorithms for a Vi...

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IEEE Global Communications Conference (GLOBECOM)

作者： Nemati, Hani Singhvi, Arjun Kara, Nadjia El Barachi, May Univ Quebec Ecole Technol Super Montreal PQ Canada PES Inst Technol Bengaluru Karnataka India Zayed Univ Abu Dhabi U Arab Emirates

ISBN: (纸本)9781479974702

The IP Multimedia System (IMS) is an important reference service delivery platform for next generation networks and is considered as a de-facto standard for IP-based multimedia communication services. In its current design, the IMS faces important challenges in terms of scalability and elasticity, and lacks the ability to adaptively manage the network resources and dynamically dimension the network nodes based on load and demand. network function virtualization and cloud computing are two important concepts that can be leveraged to address those challenges in IMS environments. In this work, we propose two adaptive SLA-based elasticity management algorithms for virtualized IMS environments. Our proposed algorithms use two SLA attributes (the call setup delay and user priority) to dynamically control the CPU resources allocated/de-allocated to virtualized IMS nodes. The aims of our proposed algorithms are: 1) to ensure efficient usage and sharing of CPU resources by various IMS components;2) to reduce the overall power consumption in virtualized IMS platforms;and 3) to enhance the user experience when using IMS networks. We have tested the proposed algorithms by setting up a virtualized IMS environment using OpenIMS Core and Xen as the hypervisor. The results obtained show that our proposed algorithms meet the SLA constraints, even when subjected to dynamic load, thereby enhancing the overall QoS. We have also compared the proposed algorithms with Xen Server's existing CPU resource scaling governors and the results indicate that our algorithms work better when compared to the existing governors.

关键词： IP Multimedia Subsystem Elasticity management network function virtualization Cloud Computing Xen

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A PCE-based Architecture for the Management of Virtualized Infrastructures 3

A PCE-based Architecture for the Management of Virtualized I...

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3rd IEEE International Conference on Cloud networking (CloudNet)

作者： Donadio, Pasquale Fioccola, Giovanni B. Canonico, Roberto Ventre, Giorgio Alcatel Lucent Italia Milan Italy Univ Napoli Federico II Dip Ingn Elettr & Tecnol Informaz Naples Italy

ISBN: (纸本)9781479927302

The emerging network function virtualization paradigm (NFV) is a disruptive change that creates new business opportunities for vendors and carriers. By exploiting virtualization technologies, it allows the dynamic creation of logically isolated infrastructures over abstracted physical networks. To be able to offer Virtualized Services efficiently, service providers need a new class of Management systems able to manage and orchestrate both network and IT virtualized resources. In this paper, we propose an enhanced network Control Plane, based on the standard Path Computation Element (PCE) architecture, which is able to jointly make network routing and IT server provisioning decisions and that can be used in an NFV environment.

关键词： Cloud Computing network function virtualization network Management Path Computation Element Optical networks

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Fostering Rapid, Cross-domain Service Innovation in Operator networks through Service Provider SDN

Fostering Rapid, Cross-domain Service Innovation in Operator...

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IEEE International Conference on Communications (ICC)

作者： Kempf, James Koerling, Martin Baucke, Stephen Touati, Samy McClelland, Victa Mas, Ignacio Backman, Olof Ericsson Silicon Valley San Jose CA 95134 USA Ericsson Sweden Kista Sweden

ISBN: (纸本)9781479920037

Software defined networking (SDN) and network function virtualization (NFV) are new approaches to next generation network architecture for operator networks that have received much discussion in the research literature and in new forums organized to standardize their interfaces. While these approaches to network architecture are important, they only cover part of the problem. A fundamental property required from any next generation architecture is support for rapid, crossdomain service innovation. In this paper, we discuss Service Provider SDN (SP-SDN), an architectural approach to rapid service innovation based on exposure of functionality for crossdomain control at the service layer. The functionality is exposed through Web-style interfaces that feature abstractions crafted by suppressing detail irrelevant for the majority of the created services. The control spans mobile, fixed and cloud operator networks, allowing the rapid and flexible provisioning of services across all three domains. We compare this approach to SDN and NFV, and find that SP-SDN complements rather than competes with the two. We present two examples of prototype systems built with SP-SDN.

关键词： software defined networking network function virtualization service provider SDN cloud networking crossdomain control

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Enhancing OpenFlow Actions to Offload Packet-In Processing 16

Enhancing OpenFlow Actions to Offload Packet-In Processing

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16th Asia-Pacific network Operations and Management Symposium (APNOMS)

作者： Farhadi, Hamid Du, Ping Nakao, Akihiro Univ Tokyo Tokyo 1138654 Japan

Software-Defined networking (SDN) increasingly attracts more researchers as well as industry attentions. Open-Flow as a major API for SDN applies rules to every packet. However, it only supports a few actions that ar... 详细信息

ISBN: (纸本)9784885522888

Software-Defined networking (SDN) increasingly attracts more researchers as well as industry attentions. Open-Flow as a major API for SDN applies < match, action > rules to every packet. However, it only supports a few actions that are all predefined. We extend this limitation of OpenFlow and propose User-Defined Actions (UDAs) for SDN. We discuss usecases of UDAs and propose an architecture to realize UDAs. Using our architecture we conduct a series of tests. We indicate that our UDAs can elevate millisecond-scale running time of current proposals to nanosecond-scale (including proposals from northbound applications of SDN community and virtual appliances of network function virtualization or NFV community). Also, regarding ease of programmability, we show that our proposal decrease the lines of code of by 72.9% and 79.3% compared to implementing the same functionality as a northbound application and as a standalone middlebox, respectively. In addition, we extended OpenFlow to support UDAs and implemented a few sample UDAs.

关键词： network function virtualization

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Flow processing-aware Controller Placement in Wireless DenseNets 25

Flow processing-aware Controller Placement in Wireless Dense...

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25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC)

作者： Auroux, Sebastien Karl, Holger Univ Paderborn Paderborn Germany

ISBN: (纸本)9781479949120

The traffic demand in wireless access networks has grown substantially in recent years and is expected to continue doing so, both in terms of total volume and data rate required by individual users. To overcome the current limitations of wireless access networks, operators already push for very dense and heterogeneous wireless networks, commonly known as DenseNets. Efficiently controlling DenseNets is a task for current research, as simply scaling existing networks by orders of magnitude brings along several problems, e.g. increased energy consumption and the explosion of signaling. Further, new innovations such as network functions virtualization (NFV) which target the operation expenses for networks with a large variety of proprietary hardware appliances, reveal that data flow processing should not be neglected in this research domain. Software-Defined networking (SDN), which separates the control plane and the data forwarding plane, has been identified as a promising approach for an efficient control of DenseNets. However, the controllers of classic SDN approaches are confined to the routing of data flows, while the support of sophisticated processing mechanisms, e.g. NFV or Coordinated Multi-Point transmission (CoMP), is not considered. Data flow processing imposes many requirements on data rate, latency and processing capacity. Hence, an adequate allocation of the locations for data processing in a network is a challenging task and crucial for network performance. In this paper we propose our flow processing-aware controller placement framework that takes into account data flow processing and control applications, both enhancing the SDN architecture specifically for DenseNets.

关键词： network function virtualization

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Service-Aware network function Placement for Efficient Traffic Handling in Carrier Cloud

Service-Aware Network Function Placement for Efficient Traff...

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IEEE Wireless Communications and networking Conference (WCNC)

作者： Bagaa, Miloud Taleb, Tarik Ksentini, Adlen CERIST Dept Theories & Comp Engn Algiers Algeria NEC Europe Heidelberg Heidelberg Germany Univ Rennes 1 IRISA F-35014 Rennes France

ISBN: (纸本)9781479930838

Carrier Cloud is a promising concept towards the decentralization of mobile networks, to, in turn, alleviate mobile traffic load and reduce mobile operator cost. Carrier cloud is enabled by two main approaches, namely virtualization of the mobile network functions and networking over federated cloud. For intelligent carrier cloud dimensioning, the placement of mobile network functions over federated cloud is of vital importance. In this vein, this paper argues the need for adopting service/application type and requirements as metrics for (i) creating virtual instances of the Packet Data network Gateways (PDN-GW) and (ii) selecting adequate virtual PDN-GWs for User Equipment receiving specific application type. After modeling this procedure as a nonlinear Optimization Problem and proving it as a NP-hard problem, we propose three solutions to solve it. The proposed solutions are evaluated through computer simulations and encouraging results are obtained.

关键词： Carrier Cloud Mobile Cloud Mobile networks network function virtualization Load Balancing

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