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2014 international conference on optical Network design and modeling, ondm 2014

2014 International Conference on Optical Network Design and ...

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18th international conference on optical networking design and modeling, ondm 2014

ISBN: (纸本)9783901882609

the proceedings contain 51 papers. the topics discussed include: applying p-cycle technique to elastic optical networks;survivability of multicast requests in mesh optical networks;protection strategies for next generation passive optical networks -2;survivable overlay multicasting in WDM optical networks with dual homing architecture;topology-dependent selective and partial protection of optical access networks;a scalable optimization approach to minimizing IP protection capacity for long-reach PON;SDN an enabler for multi-dimensional and multi-tenant optical networks;carrier SDN to control flexgrid-based inter- datacenter connectivity;switching node architectures in flexible-grid networks: a performance comparison;and the spectrum assignment (SA) problem in optical networks: a multiprocesor scheduling Perspective.

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Requirements and design of Flexible NFV Network Infrastructure Node Leveraging SDN/OpenFlow

Requirements and Design of Flexible NFV Network Infrastructu...

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18th international conference on optical Network design and modeling (ondm)

作者： Masutani, Hitoshi Nakajima, Yoshihiro Kinoshita, Takeshi Hibi, Tomoya Takahashi, Hirokazu Obana, Kazuaki Shimano, Katsuhiro Fukui, Masaki NTT Network Innovat Labs Yokosuka Kanagawa Japan

ISBN: (纸本)9783901882609

Carrier network service infrastructures are becoming increasingly complex since thousands of service-specific hardware-based network nodes are implemented to support a wide variety of network services. this has resulted in critically high increases in the maintenance costs to ensure service quality for network services and the deployment costs for new network services. Addressing these problems requires new ways to simplify and automate operations and infrastructures. Network Function Virtualization (NFV) and software-defined networking (SDN)/OpenFlow are attractive concepts that address these problems. In this study we present the requirements and a basic design of a flexible and elastic network service infrastructure with NFV and SDN/OpenFlow. We also introduce a virtual BRAS (Broadband Remote Access Server) prototype using Intel DPDK as high performance throughputs.

关键词： Network Function Virtualiz ation Software-Defined networking OpenFlow virtual machine monitor virtual switch software switch

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Evaluation of Virtualization Models for optical Connectivity Service Providers

Evaluation of Virtualization Models for Optical Connectivity...

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18th international conference on optical Network design and modeling (ondm)

作者： Autenrieth, Achim Szyrkowiec, thomas Grobe, Klaus Elbers, Joerg-Peter Kaczmarek, Pawel Kostecki, Pawel Kellerer, Wolfgang ADVA Opt Networking SE Fraunhoferstr 9a D-82152 Martinsried Germany Tech Univ Munich Inst Commun Networks D-80290 Munich Germany ADVA Opt Networking Sp Zoo PL-81310 Gdynia Poland

ISBN: (纸本)9783901882609

Network virtualization technologies combined with Software-Defined networking (SDN) principles provide a number of benefits to optical networks in terms of agility and ease of management. However, the multi-layer nature of optical systems poses challenges to system design. In this paper, we present topology virtualization models for optical connectivity service providers using an SDN-enabled flexible optical network. the virtual optical network topology will be advertised to clients of the service provider. Scheduled as well as on-demand lightpath services can be provisioned via Application Programming Interfaces (API), either based on the prominent OpenFlow [1] protocol, or via IETF-based protocols centered on an active stateful PCE (Path Computation Element) [2][3]. We discuss and compare different topology virtualization models along with their benefits and challenges. In addition, first evaluation results, based on an optical Network Hypervisor at the service provider and OpenDaylight [4], an open-source SDN controller, as the client controller, are discussed.

关键词： SDN network virtualiz ation OpenFlow OpenDaylight PCE

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Is It Worth Adapting Sub-Wavelength Switching Control Plane to Traffic Variations?

Is It Worth Adapting Sub-Wavelength Switching Control Plane ...

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18th international conference on optical Network design and modeling (ondm)

作者： Triki, Ahmed Aparicio-Pardo, Ramon Gavignet, Paulette Le Rouzic, Esther Arzur, Bernard Gravey, Annie Orange Labs Networks F-22307 Lannion France Inst Telecom F-29238 Brest France

ISBN: (纸本)9783901882609

this paper proposes a novel Metropolitan Area Network (MAN) architecture called Multi-hEad sub-wavElength swiTching (MEET). Compared with the current architectures, MEET proposes to aggregate traffic using passive optical nodes instead of using electrical nodes (switches and routers). Several options regarding a potential control plane are compared in terms of resource allocation efficiency. Two options are relative to the burst assembly process whereas another option is relative to the dynamicity of the resource allocation process. Performance evaluation is carried out using a simulation platform fed by real traffic traces captured on a French operator's metropolitan network the QoS delivered to three different classes of service has been assessed in terms of latency and jitter. Obtained results show that a control plane that does not adapt to short-term variations of the real traffic may provide QoS levels compatible with an operational MAN.

关键词： Metropolitan area networks optical switches Next generation networking

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A Novel Flexible Grid/Semi-flexible Grid optical Path Network design Algorithm that Reserves Exclusive Frequency Slots for High Bitrate Signals

A Novel Flexible Grid/Semi-flexible Grid Optical Path Networ...

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18th international conference on optical Network design and modeling (ondm)

作者： Shen, Zhi-shu Hasegawa, Hiroshi Sato, Ken-ichi Nagoya Univ Dept Elect Engn & Comp Sci Chikusa Ku Nagoya Aichi 4648603 Japan

ISBN: (纸本)9783901882609

We propose a novel routing and spectrum assignment algorithm that reserves exclusive spectrum area for high bitrate signals. the aim of this study is to reduce the inherent blocking ratio inequality caused by the non-uniform bandwidth allocation in flexible grid/semi-flexible grid optical path networks. Numerical experiments demonstrate that our proposed assignment strategy can reduce the path setup blocking ratio for both flexible grid and semi-flexible grid networks. the traffic volume accommodated by the network can be improved by 10%. the effectiveness of our proposal is verified for various bitrate signal patterns and network topologies.

关键词： Flexible grid/ Semi-flexible grid optical path network Routing and Spectrum Assignment

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Improving Reliability in Multi-Layer Networks With Network Coding Protection

Improving Reliability in Multi-Layer Networks With Network C...

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18th international conference on optical Network design and modeling (ondm)

作者： Ramirez, W. Masip-Bruin, X. Marin-Tordera, E. Yannuzzi, M. Siddiqui, M. S. Martinez, A. Lopez, V. Tech Univ Catalonia UPC Adv Network Architectures Lab CRAAX Barcelona Spain Tech Univ Catalonia Networking & Informat Technol Lab Barcelona Spain Telefon ID Madrid Spain

ISBN: (纸本)9783901882609

A major concern among network providers is to endow their networks with the ability to withstand and recover from failures. In recent years, there is a trend in network research referred to as Network Coding Protection (NCP). NCP combines the use of network coding techniques with a proactive protection scheme with the aim of improving network reliability. Although today's network backbone is a multi-layer network formed by the convergence of IP/MPLS and optical technologies, the information available in the literature related to the performance of NCP schemes in multi-layer network scenarios is yet scarce. In this paper, we propose a novel NCP scheme referred to as DPNC+. the novelty of DPNC+ is that it exploits cross-layer information in order to improve the reliability of multi-layer (IP/MPLS over optical) networks against link failures. Our evaluation results show that reduction up to 50% related to protection cost can be obtained when using the proposed scheme compared to conventional proactive protection techniques.

关键词： Multi-Layer networks Network Coding Protection Cross-Layer Information

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design of Grouped Routing Entity (GRE)-based optical Networks with 100% Signal Quality Guarantee

Design of Grouped Routing Entity (GRE)-based Optical Network...

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18th international conference on optical Network design and modeling (ondm)

作者： Jirattigalachote, Amornrat Monti, Paolo Wosinska, Lena Taniguchi, Yuki Ban, Toshinori Hasegawa, Hiroshi Sato, Ken-ichi KTH Royal Inst Technol Sch Informat & Commun Technol Isafjordsgatan 22Electrum 229 S-16440 Kista Sweden Nagoya Univ Dept Elect Engn & Comp Sci Chikusa ku Nagoya Aichi 4648603 Japan

ISBN: (纸本)9783901882609

In bandwidth abundant optical networks it is important to develop design strategies that are not only cost effective but also able to account for the inherent characteristics of the optical transmission medium responsible for the signal quality degradation. With this objective in mind, the paper proposes a design algorithm able to determine an appropriate placement of regenerators in Grouped Routing Entity (GRE)-based optical networks. the objective of the algorithm is to guarantee a certain signal quality level to all connections while minimizing the number of fibers and switching ports required in the network the proposed design strategy relies on a physical-layer impairment model, specifically introduced in the paper for this purpose, able to estimate the signal quality of an optical path in a GRE-based optical network Simulation results indicate that compared with a single layer optical path network the proposed design algorithm can reduce at least 87% of the switch ports while the increment in the number of fibers is lower than 10%.

关键词： Physical-layer impairments signal quality Grouped Routing Entity (GRE) coarse granular routing 3R regenerator

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