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检索条件"主题词=Network Function Virtualization"

共 3145 条记录，以下是71-80 订阅

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STATOEUVER: State-aware Load Balancing for network function virtualization

STATOEUVER: State-aware Load Balancing for Network Function ...

引用

IEEE Conference on Computer Communications (IEEE INFOCOM)

作者： Feng, Wendi Cao, Ranzheng Zhang, Zhi-Li Beijing Informat Sci & Technol Univ Beijing Peoples R China Univ Minnesota Twin Cities Minneapolis MN USA

ISBN: (纸本)9781665409261

By running network functions as software on commodity servers instead of on expensive dedicated hardware middle-boxes, network function virtualization (NFV) offers many benefits. It provides flexible control and management of network functions (NFs), and it lowers network management and deployment costs. In particular, NFV makes it easier and cheaper to scale out to meet growing traffic demands by deploying NF instances on more CPU cores, hence has been widely touted as the future of networking.

关键词： Costs Conferences Fasteners Load management Software Hardware network function virtualization

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Coded Computation Against Straggling Decoders for network function virtualization

Coded Computation Against Straggling Decoders for Network Fu...

引用

IEEE International Symposium on Information Theory (ISIT)

作者： Aliasgari, Malihe Kliewer, Jorg Simeone, Osvaldo New Jersey Inst Technol Helen & John C Hartmann Dept Elect & Comp Engn Newark NJ 07102 USA Kings Coll London Dept Informat London England

ISBN: (纸本)9781538647813

The uplink of a cloud radio access network architecture is studied in which decoding at the cloud takes place via network function virtualization (NFV) on commercial off-the-shelf (COTS) servers. In order to mitigate the impact of straggling decoders in the cloud computing platform, a novel coding strategy is proposed, whereby the cloud re-encodes the received frames via a linear code before distributing them to the decoding processors. Upper bounds on the resulting frame unavailability probability (FUP) as a function of the decoding latency are derived by assuming a binary symmetric channel for uplink communications. The bounds leverage large deviation results for correlated variables, and depend on the properties of both the uplink linear channel code adopted at the user and the NFV linear code applied at the cloud. Numerical examples demonstrate that the bounds are useful tools for code design, and that coding is instrumental in obtaining a desirable trade-off between FUP and decoding latency.

关键词： Coded computation network function virtualization C-RAN large deviation

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network Service Chaining Challenges for VNF Outsourcing in network function virtualization 6

Network Service Chaining Challenges for VNF Outsourcing in N...

引用

2015 International Conference on Information and Communication Technology Convergence (ICTC)

作者： Jeon, Hongseok Lee, Bhumcheol Elect & Telecommun Res Inst Smart Network Res Dept Network Comp Convergence Res Sect Daejeon South Korea

ISBN: (纸本)9781467371162

Fundamentally, network function virtualization (NFV) allows virtual network functions (VNFs) to be outsourced by a third party because it separates network functions from their locations. However, the VNF outsourcing raises significant challenges for network service chains, which is a necessary technology to realize NFV. This paper discusses challenges of the network service chain under consideration for VNF outsourcing.

关键词： NFV network function virtualization network service chain VNF VNF outsourcing

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Efficient Dynamic Service function Chain Combination of network function virtualization 37

Efficient Dynamic Service Function Chain Combination of Netw...

引用

37th IEEE International Conference on Distributed Computing Systems (ICDCS)

作者： Yan, Wenke Zhu, Konglin Zhang, Lin Su, Sixi Beijing Univ Posts & Telecommun Sch Informat & Commun Engn Beijing Peoples R China

ISBN: (纸本)9781538632932

network function virtualization (NFV) and Software Defined network (SDN) are introduced to provide virtualization technology, which can tackle the deployment of network service functions in corporate networks, broadband access networks, and more recently in data centers. It is full of challenge to enhance the flexibility, efficiency and effectiveness of service function deployment. Although Service function Chain (SFC) is carried out to support the flexibility of network services, it still needs one step forward to fulfill the efficient and effective combination of network services. In this paper, we propose an orthogonal crossover differential evolution (OXDE) to optimize SFC combination with respect to processing delay, energy consumption, packet loss rate and so on. The evaluation results show that the proposed OXDE algorithm outperforms the other algorithms and it can achieve the efficiency and effectiveness of SFC combination.

关键词： Service deployment network function virtualization Differential Evolution

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EmPOWER: A Testbed for network function virtualization Research and Experimentation

EmPOWER: A Testbed for Network Function Virtualization Resea...

引用

IEEE Workshop on Software Defined networks for Future networks and Services (SDN4FNS)

作者： Riggio, Roberto Rasheed, Tinku Granelli, Fabrizio CREATE NET Trento Italy Univ Trento Trento Italy

ISBN: (纸本)9781479927814;9781479927807

Software Defined networking (SDN) and network function virtualization (NFV) are making their way into the research agenda of all the major players in the networking domain. Parallely, testbeds and experimental facilities are widely regarded as the fundamental step-stone to future "clean slate" networking. However, designing and building experimental facilities can hardly be considered a trivial step for either researchers and practitioners. Scale, flexibility, and ease of use are just some of the challenges faced by a testbed designer. These considerations are at the base of efforts such as GENI in USA, AKARI in Japan, FEDERICA, NOVI and OFELIA in Europe which provide federated and open facilities for the Future Internet research agenda. Albeit the importance of such facilities is unquestioned, today there is still a dearth of testbed exploiting SDN and NFV concepts in the wireless networking domain. In this paper we present EmPOWER an experimental testbed which aims at filling this gap by offering an open platform on top of which novel concepts can be tested at scale. The EmPOWER testbed is composed by 3 0 nodes and is currently used by both undergraduate and graduate students at the University of Trento and by the research staff at CREATE-NET.

关键词： Software Defined networking network function virtualization WiFi Testbeds Open-source

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Distributed Stochastic Optimization of network function virtualization

Distributed Stochastic Optimization of Network Function Virt...

引用

IEEE Global Telecommunications Conference (GLOBECOM)

作者： Chen, Xiaojing Ni, Wei Chen, Tianyi Collings, Iain B. Wang, Xin Liu, Ren Ping Giannakis, Georgios B. Fudan Univ Dept Commun Sci & Engn 1Key Lab EMW Informat MoE Shanghai Peoples R China CSIRO Digital Prod & Serv DP&S Flagship Canberra ACT Australia Univ Minnesota Dept Elect & Comp Engn Minneapolis MN 55455 USA Univ Minnesota Digital Technol Ctr Minneapolis MN 55455 USA Macquarie Univ Dept Engn N Ryde NSW Australia Univ Technol Sydney Sch Comput & Commun Sydney NSW Australia

ISBN: (纸本)9781509050192

Decoupling network services from underlying hardware, network function virtualization (NFV) is expected to significantly improve agility and reduce network cost. However, network services, sequences of network functions, need to be processed in specific orders at specific types of virtual machines (VMs), which couples decisions of VMs on processing or routing network services. Built on a new stochastic dual gradient method, our approach suppresses the couplings, minimizes the time-average cost of NFV, stabilizes queues at VMs, and reduces the backlogs of unprocessed services through online learning and adaptation. Asymptotically optimal decisions are instantly generated at individual VMs, with a cost-delay tradeoff [epsilon, log(2) (epsilon)/root epsilon]. Numerical results show that the proposed method is able to reduce the time-average cost of NFV by 30% and reduce the queue length (or delay) by 83%, as compared to existing non-stochastic approaches.

关键词： network function virtualization virtual machine distributed optimization stochastic approximation

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Cloud Management using network function virtualization to Reduce CAPEX and OPEX 8

Cloud Management using Network Function Virtualization to Re...

引用

8th International Conference on Computational Intelligence and Communication networks (CICN)

作者： Ananth, M. D. Sharma, Rinki MS Ramaiah Univ Appl Sci Dept Comp Engn Bangalore Karnataka India

ISBN: (纸本)9781509011445

As the users on the cloud network increase, the consumption of the Compute, network and Storage resources also increases. This leads to increase in the cost of deployment, configuration and maintenance. Hence, the Capital Expenditure (CAPEX) and Operational Expenditure (OPEX) of the organization providing the cloud network increases. network function virtualization (NFV) is a technology which virtualizes network functionalities. This paper studies the influence of NFV on CAPEX and OPEX of cloud based networks and compares it with traditional implementation (without NFV) of such networks. A prototype cloud networkbased on NFV implementation is developed and implemented. Based on the test cases developed on the prototype, CAPEX and OPEX of the resources used for both NFV based and traditional implementations are studied and analyzed. RESTful web services are created for the users of the cloud network to orchestrate and manage the network on the cloud. The results accomplished show that NFV based implementation reduces the CAPEX and OPEX, when compared with the traditional implementation. It is also observed that orchestration mechanism reduces complexity of management of cloud network.

关键词： Cloud Cloud Management network function virtualization NFV CAPEX OPEX OpenStack Orchestration

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VGuard: A Distributed Denial of Service Attack Mitigation Method using network function virtualization 11

VGuard: A Distributed Denial of Service Attack Mitigation Me...

引用

11th International Conference on network and Service Management (CNSM)

作者： Fung, Carol J. McCormick, Bill Virginia Commonwealth Univ Dept Comp Sci Richmond VA 23284 USA Huawei Canada Ottawa ON Canada

ISBN: (纸本)9783901882777

Distributed denial of service (DDoS) attacks have caused tremendous damage to ISPs and online services. They can be divided into attacks using spoofed IPs and attacks using real IPs (botnet). Among them the attacks from real IPs are much harder to mitigate since the attack traffic can be fabricated to be similar to legitimate traffic. The corresponding DDoS defence strategies proposed in past few years have not been proven to be highly effective due to the limitation of participating devices. However, the emergence of the next generation networking technologies such a network function virtualization (NFV) provide a new opportunity for researchers to design DDoS mitigation solutions. In this paper we propose VGuard, a dynamic traffic engineering solution based on prioritization, which is implemented on a DDoS virtual network function (VNF). The flows from the external zone are directed to different tunnels based on their priority levels. This way trusted legitimate flows are served with guaranteed quality of service, while attack flows and suspicious flows compete for resources with each other. We propose two methods for flow direction: the static method and the dynamic method. We evaluated the performance of both methods through simulation. Our results show that both methods can effectively provide satisfying service to trusted flows under DDoS attacks, and both methods have their pros and cons under different situations.

关键词： network function virtualization

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Pending-Interest-Driven Cache Orchestration Through network function virtualization

Pending-Interest-Driven Cache Orchestration Through Network ...

引用

IEEE Global Communications Conference (GLOBECOM)

作者： Suksomboon, Kalika Fukushima, Masaki Hayashi, Michiaki Ji, Yusheng KDDI R&D Labs Inc Saitama 3568502 Japan Natl Inst Informat Tokyo 1018430 Japan

ISBN: (纸本)9781479935123

Emerging information-centric networking architectures drives a wider focus of content caching mechanisms. Most recent efforts have been attempting for server and user friendliness, i.e., reduction in content-server load and content-delivery time. Those solutions require the prior knowledge of cache state and content popularity exchanged among routers. Challenging tasks are pushed to routers since their explicit coordination is required. Instead of burdening routers, but still keeping the effectiveness of in-network caching, we move the explicit coordination task from routers to a cache orchestrator where the offline optimal caching policy is computed while leaving the simplest cache decision to the routers. By means of the network function virtualization, this paper proposes a cache orchestration lifecycle including three parts, i.e., name hit caching (NHC) policy, pending time history and network cache orchestration. By exploiting NHC policy, a router simply caches the content whose name matches its assigned content name set. Evaluation through simulations demonstrates that NHC policy achieves the lowest content-server load and content downloading time and the highest cache hit ratios in all routers comparing with leaving copy everywhere, probability caching and content-popularity-based cache orchestration policies.

关键词： network function virtualization

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Orchestrating network function virtualization Platform: Migration or Re-Instantiation? 6

Orchestrating Network Function Virtualization Platform: Migr...

引用

IEEE 6th International Conference on Cloud networking (CloudNet)

作者： Hawilo, Hassan Jammal, Manar Shami, Abdallah Western Univ Dept Elect & Comp Engn London ON Canada

ISBN: (纸本)9781509040261

network function virtualization (NFV) provokes the evolution of network functions to overcome various challenges facing the network service providers (NSPs). To exploit the advantages of the virtualization technology, NFV platforms should use the cloud environment to provide their services. Typically, an NFV service is represented by a service function chain (SFC) that consists of multiple virtualized network functions (VNFs). Hosting and orchestrating these VNFs in a cloud environment are challenging tasks. In this paper, we discuss the VNF orchestration problem from the perspective of VNF's migration and reinstantiation mechanism to achieve carrier grade-aware NFV services in a cloud-based platform. This paper also provides detailed insights on the NFV system modeling, building blocks, and various challenges hindering its cloud adoption. Also, a novel mixed integer linear programming (MILP) optimization model is proposed as a solution to facilitate the NFV platform orchestration in a cloud environment. The model decides between triggering either VNF's migration or re-instantiation while achieving minimal downtime of the VNF, satisfying carrier grade requirements, and finding an optimal placement for the migrated or re-instantiated VNF that minimizes the SFC delays. The proposed model is compared to two availability-agnostic greedy algorithms. The simulation results show that finding an optimized decision whether to migrate or re-instantiate a VNF while associating it with an optimal placement can achieve a minimal VNF's downtime and SFCs delays and can enhance the quality of service accordingly.

关键词： network function virtualization Software Defined networking Cloud Computing Service function Chain network Softwarization

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