The Experts below are selected from a list of 87072 Experts worldwide ranked by ideXlab platform
Jie Zhang - One of the best experts on this subject based on the ideXlab platform.
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Reinforcement-Learning-Based Multi-Failure Restoration in Optical Transport Networks
2019Co-Authors: Zipiao Zhao, Yongli Zhao, Dajiang Wang, Ying Wang, Jie ZhangAbstract:A reinforcement-learning-based multi-failure restoration algorithm is proposed based on multi-modal representation in Optical Transport networks. Numerical results show the proposed algorithm has higher success ratio of service restoration than the benchmark algorithm.
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Performance verification of network function virtualization in software defined Optical Transport networks
Optical Fiber Technology, 2017Co-Authors: Yongli Zhao, Liyazhou Hu, Yajie Li, Wei Wang, Jie ZhangAbstract:With the continuous opening of resource acquisition and application, there are a large variety of network hardware appliances deployed as the communication infrastructure. To lunch a new network application always implies to replace the obsolete devices and needs the related space and power to accommodate it, which will increase the energy and capital investment. Network function virtualization1 (NFV) aims to address these problems by consolidating many network equipment onto industry standard elements such as servers, switches and storage. Many types of IT resources have been deployed to run Virtual Network Functions (vNFs), such as virtual switches and routers. Then how to deploy NFV in Optical Transport networks is a of great importance problem. This paper focuses on this problem, and gives an implementation architecture of NFV-enabled Optical Transport networks based on Software Defined Optical Networking (SDON) with the procedure of vNFs call and return. Especially, an implementation solution of NFV-enabled Optical Transport node is designed, and a parallel processing method for NFV-enabled OTN nodes is proposed. To verify the performance of NFV-enabled SDON, the protocol interaction procedures of control function virtualization and node function virtualization are demonstrated on SDON testbed. Finally, the benefits and challenges of the parallel processing method for NFV-enabled OTN nodes are simulated and analyzed.
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Shared risk link groups-aware virtual link mapping in packet Optical Transport networks with multi-mode fibers
2016 15th International Conference on Optical Communications and Networks (ICOCN), 2016Co-Authors: Yongli Zhao, Jie Zhang, Xiaodong Zhou, Xiaoli Zhen, Zhu LiuAbstract:Mode-spectrum matrix is introduced to describe the multi-dimensional resources in packet Optical Transport networks (POTN) with multi-mode fibers (MMF), based on which a novel shared backup path protection algorithm is proposed to optimize the allocation of Optical resource during virtual link mapping (VLM) in packet Optical Transport networks.
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OFC - Network function virtualization in software defined Optical Transport networks
Optical Fiber Communication Conference, 2016Co-Authors: Yongli Zhao, Wei Wang, Rui Tian, Jie Zhang, Xinbo WangAbstract:Network function virtualization (NFV) enabled software defined Optical Transport networks are first designed to implement the virtualization of control and node function, and virtualization solution is demonstrated to verify the overall feasibility and efficiency.
Yongli Zhao - One of the best experts on this subject based on the ideXlab platform.
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Reinforcement-Learning-Based Multi-Failure Restoration in Optical Transport Networks
2019Co-Authors: Zipiao Zhao, Yongli Zhao, Dajiang Wang, Ying Wang, Jie ZhangAbstract:A reinforcement-learning-based multi-failure restoration algorithm is proposed based on multi-modal representation in Optical Transport networks. Numerical results show the proposed algorithm has higher success ratio of service restoration than the benchmark algorithm.
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Performance verification of network function virtualization in software defined Optical Transport networks
Optical Fiber Technology, 2017Co-Authors: Yongli Zhao, Liyazhou Hu, Yajie Li, Wei Wang, Jie ZhangAbstract:With the continuous opening of resource acquisition and application, there are a large variety of network hardware appliances deployed as the communication infrastructure. To lunch a new network application always implies to replace the obsolete devices and needs the related space and power to accommodate it, which will increase the energy and capital investment. Network function virtualization1 (NFV) aims to address these problems by consolidating many network equipment onto industry standard elements such as servers, switches and storage. Many types of IT resources have been deployed to run Virtual Network Functions (vNFs), such as virtual switches and routers. Then how to deploy NFV in Optical Transport networks is a of great importance problem. This paper focuses on this problem, and gives an implementation architecture of NFV-enabled Optical Transport networks based on Software Defined Optical Networking (SDON) with the procedure of vNFs call and return. Especially, an implementation solution of NFV-enabled Optical Transport node is designed, and a parallel processing method for NFV-enabled OTN nodes is proposed. To verify the performance of NFV-enabled SDON, the protocol interaction procedures of control function virtualization and node function virtualization are demonstrated on SDON testbed. Finally, the benefits and challenges of the parallel processing method for NFV-enabled OTN nodes are simulated and analyzed.
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Shared risk link groups-aware virtual link mapping in packet Optical Transport networks with multi-mode fibers
2016 15th International Conference on Optical Communications and Networks (ICOCN), 2016Co-Authors: Yongli Zhao, Jie Zhang, Xiaodong Zhou, Xiaoli Zhen, Zhu LiuAbstract:Mode-spectrum matrix is introduced to describe the multi-dimensional resources in packet Optical Transport networks (POTN) with multi-mode fibers (MMF), based on which a novel shared backup path protection algorithm is proposed to optimize the allocation of Optical resource during virtual link mapping (VLM) in packet Optical Transport networks.
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OFC - Network function virtualization in software defined Optical Transport networks
Optical Fiber Communication Conference, 2016Co-Authors: Yongli Zhao, Wei Wang, Rui Tian, Jie Zhang, Xinbo WangAbstract:Network function virtualization (NFV) enabled software defined Optical Transport networks are first designed to implement the virtualization of control and node function, and virtualization solution is demonstrated to verify the overall feasibility and efficiency.
Gangxiang Shen - One of the best experts on this subject based on the ideXlab platform.
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Guest Editorial Next-Generation Spectrum-Efficient and Elastic Optical Transport Networks
IEEE Journal on Selected Areas in Communications, 2013Co-Authors: Gangxiang Shen, Ken-ichi Sato, William Shieh, Ioannis Tomkos, Jennifer Yates, Eric WongAbstract:The six papers in this special issue are devoted to the topic of next generation spectrum efficient and elastic Optical Transport systems.
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Girdless CO-OFDM Optical Transport networks
2012Co-Authors: Gangxiang ShenAbstract:Due to the advantage of high spectral efficiency and flexible bandwidth allocation capability, coherent-Optical orthogonal frequency division multiplexing (CO-OFDM) Optical Transport networks have recently received extensive interests. In this paper, we discuss several important research aspects on this type of network ranging from nodal architectures, key networking research issues, and testbeds.
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spectrum efficient and agile co ofdm Optical Transport networks architecture design and operation
IEEE Communications Magazine, 2012Co-Authors: Gangxiang Shen, M ZukermanAbstract:Traditional ITU-T fixed frequency grid-based Optical Transport networks suffer several drawbacks such as low fiber spectral efficiency, difficulty in supporting large-bandwidth super-channels, and inflexibility in network bandwidth reconfiguration and modification. To overcome these drawbacks, a new-generation Optical Transport network based on the concepts of agile spectrum operation and elastic bandwidth allocation has been recently proposed and is receiving increasing attention. This new-generation network is called coherent Optical orthogonal frequency-division multiplexing (CO-OFDM) Optical Transport network. It employs the promising CO-OFDM transmission technique and the new-generation bandwidth-variable ROADMs that use the coherent detection capability of the CO-OFDM transmission for Optical channel filtering. The CO-OFDM Optical Transport network is characterized by arbitrarily assigning center frequency and bandwidth of an Optical channel, thereby providing flexibility in network design and operation and achieving efficient fiber spectrum utilization. Despite the increasing attention and considerable progress, there are still many outstanding issues regarding the implementation of CO-OFDM Optical Transport networks. This article reviews the literature on the architectures of the CO-OFDM Optical Transport network and discusses key issues, particularly involving network control plane, lightpath routing and spectrum assignment, impact of channel modulation format and Optical reach, subwavelength traffic grooming, network survivability, and network reconfiguration.
M Zukerman - One of the best experts on this subject based on the ideXlab platform.
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spectrum efficient and agile co ofdm Optical Transport networks architecture design and operation
IEEE Communications Magazine, 2012Co-Authors: Gangxiang Shen, M ZukermanAbstract:Traditional ITU-T fixed frequency grid-based Optical Transport networks suffer several drawbacks such as low fiber spectral efficiency, difficulty in supporting large-bandwidth super-channels, and inflexibility in network bandwidth reconfiguration and modification. To overcome these drawbacks, a new-generation Optical Transport network based on the concepts of agile spectrum operation and elastic bandwidth allocation has been recently proposed and is receiving increasing attention. This new-generation network is called coherent Optical orthogonal frequency-division multiplexing (CO-OFDM) Optical Transport network. It employs the promising CO-OFDM transmission technique and the new-generation bandwidth-variable ROADMs that use the coherent detection capability of the CO-OFDM transmission for Optical channel filtering. The CO-OFDM Optical Transport network is characterized by arbitrarily assigning center frequency and bandwidth of an Optical channel, thereby providing flexibility in network design and operation and achieving efficient fiber spectrum utilization. Despite the increasing attention and considerable progress, there are still many outstanding issues regarding the implementation of CO-OFDM Optical Transport networks. This article reviews the literature on the architectures of the CO-OFDM Optical Transport network and discusses key issues, particularly involving network control plane, lightpath routing and spectrum assignment, impact of channel modulation format and Optical reach, subwavelength traffic grooming, network survivability, and network reconfiguration.
M. Klymash - One of the best experts on this subject based on the ideXlab platform.
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Configuration of network management for energy efficiency in Optical Transport networks using GMPLS and OBS techniques
Simulation Modelling Practice and Theory, 2017Co-Authors: М. Kaidan, Volodymyr Andrushchak, Natalia Kryvinska, M. Klymash, M. SeliuchenkoAbstract:Abstract The suboptimal distribution of the traffic load over the high-speed Optical network channels results in poor overall channel utilization and leads to the increased energy consumption. This means that configuration of the network management system including traffic engineering protocols and traffic management mechanisms may have indirect but significant impact on the overall energy efficiency of the particular Optical Transport network setup. Therefore, we aim in this paper to estimate how energy efficiency of the Optical Transport network depends on the configuration of the management protocols and mechanisms deployed into the GMPLS and OBS technologies. In addition, we analyze particular configurations of specific mechanisms those allow to increase energy efficiency of the Optical Transport network without compromising the parameters of the quality of service (QoS).
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Approaches to Optical Transport systems efficiency increasing
2008Co-Authors: M. KlymashAbstract:The conceptions and approaches of Optical Transport networks development optimization were reviewed and analyzed in this paper. A choice of the appropriate network development and stream's management conceptions, strategies was related with common network technical and economical indexes. New approaches for Optical networks topological properties application are described.
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Optical Transport systems: Efficiency increasing and stream management methods
2008Co-Authors: M. KlymashAbstract:In this article the methods of calculation and increasing of Optical Transport systems efficiency are examined with the use of system analysis elements in the sphere of new generation infocommunicational decisions development for a national informative infrastructure.
