The Experts below are selected from a list of 7956 Experts worldwide ranked by ideXlab platform
Lei Liu - One of the best experts on this subject based on the ideXlab platform.
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field trial of broker based multi domain software defined heterogeneous wireline wireless optical networks
Optical Fiber Communication Conference, 2015Co-Authors: Lei Liu, Zuqing Zhu, Xiaoliang Chen, Cen Chen, Xiong Wang, Guanghua Song, Xiaotao Feng, Roberto Proietti, S J B YooAbstract:Driven by a broker-based OpenFlow control plane, we report the first field trial of software-defined heterogeneous wireline-wireless-optical multi-domain networks connecting UC Davis Campus, USTC, California OpenFlow Testbed Network (COTN) and Energy Sciences Network (ESNet).
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OpenFlow assisted online defragmentation in single multi domain software defined elastic optical networks invited
IEEE\ OSA Journal of Optical Communications and Networking, 2015Co-Authors: Zuqing Zhu, Lei Liu, Mingyang Zhang, Xiaoliang Chen, Cen Chen, S J B YooAbstract:Spectrum fragmentation limits the efficiency of spectrum utilization in elastic optical networks (EONs). This paper studies how to take advantage of the centralized network control and management provided by software-defined EONs (SD-EONs) for realizing OpenFlow-assisted implementation of online defragmentation (DF). We first discuss the overall system design and OpenFlow protocol extensions to support efficient online DF and conduct DF experiments with routing and spectrum assignment (RSA) reconfigurations in a single-domain SD-EON. Then, we propose to realize fragmentation-aware RSA (FA-RSA) in multi-domain SD-EONs with the cooperation of multiple OpenFlow controllers. In order to provision inter-domain lightpaths with restricted domain visibility on intradomain resource utilization, we design and implement an inter-domain protocol to facilitate FA-RSA in multi-domain SD-EONs and demonstrate controlling the spectrum fragmentation on inter-domain links with FA-RSA. Our experimental results indicate that the OpenFlow-controlled DF systems perform well and can improve the performance of SD-EONs effectively.
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experimental validation and performance evaluation of OpenFlow based wavelength path control in transparent optical networks
Optics Express, 2011Co-Authors: Lei Liu, Itsuro Morita, Takehiro Tsuritani, Hongxiang GuoAbstract:OpenFlow, as an open-source protocol for network virtualization, is also widely regarded as a promising control plane technique for heterogeneous networks. But the utilization of the OpenFlow protocol to control a wavelength switched optical network has not been investigated. In this paper, for the first time, we experimentally present a proof-of-concept demonstration of OpenFlow-based wavelength path control for lightpath provisioning in transparent optical networks. We propose two different approaches (sequential and delayed approaches) for lightpath setup and two different approaches (active and passive approaches) for lightpath release by using the OpenFlow protocol. The overall feasibility of these approaches is experimentally validated and the network performances are quantitatively evaluated. More importantly, all the proposed methodologies are demonstrated and evaluated on a real transparent optical network testbed with both OpenFlow-based control plane and data plane, which allows their feasibility and effectiveness to be verified, and valuable insights of the proposed solutions to be obtained for deploying into real OpenFlow controlled optical networks.
Bartosz Belter - One of the best experts on this subject based on the ideXlab platform.
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design and implementation of an OpenFlow hardware abstraction layer
ACM Special Interest Group on Data Communication, 2014Co-Authors: Damian Parniewicz, Lukasz Ogrodowczyk, Mehdi Rashidi Fard, Umar Toseef, Adel Zaalouk, Jon Matias, Victor Fuentes, Matteo Gerola, Roberto Doriguzzi Corin, Bartosz BelterAbstract:OpenFlow is a leading standard for Software-Defined Networking (SDN) and has already played a significant role in reshaping network infrastructures. However, a wide range of existing provider domains is still not equipped with a framework that supports wider deployment of an OpenFlow-based control plane beyond Ethernet-dominated networks. We address this gap by introducing a Hardware Abstraction Layer (HAL) which can transform legacy network elements into OpenFlow capable devices. This paper details the functional architecture of HAL, discusses the key design aspects and explains how HAL can support a number of network device classes. In addition, this paper presents the implementation details of HAL for hardware platforms such as DOCSIS (Data over Cable Service Interface Specification) and DWDM (Dense Wavelength Division Multiplexing) which have so far received little attention by the OpenFlow research community despite their wide real-world deployment.
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Hardware Abstraction Layer as an SDN-enabler for Non-OpenFlow Network Equipment
2014 Third European Workshop on Software Defined Networks, 2014Co-Authors: Bartosz Belter, Lukasz Ogrodowczyk, Jon Matias, Maider Huarte, Maciej Stroinski, Victor Fuentes, Damian Parniewicz, Artur Binczewski, Eduardo JacobAbstract:This paper describes an experimentally-tested approach towards programmability for legacy network elements in the software-defined networking architecture. As OpenFlow is a leading control-plane protocol enabling SDN in modern networks, yet not all equipment is compatible with this framework. This problem is addressed in ALIEN, the FP7 research project, where Hardware Abstraction Layer (HAL) for non-OpenFlow capable devices is introduced. This paper describes outcomes of the project, and specifically, gives a set of examples of the successful implementation of OpenFlow through the HAL on 'alien' devices.
S J B Yoo - One of the best experts on this subject based on the ideXlab platform.
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field trial of broker based multi domain software defined heterogeneous wireline wireless optical networks
Optical Fiber Communication Conference, 2015Co-Authors: Lei Liu, Zuqing Zhu, Xiaoliang Chen, Cen Chen, Xiong Wang, Guanghua Song, Xiaotao Feng, Roberto Proietti, S J B YooAbstract:Driven by a broker-based OpenFlow control plane, we report the first field trial of software-defined heterogeneous wireline-wireless-optical multi-domain networks connecting UC Davis Campus, USTC, California OpenFlow Testbed Network (COTN) and Energy Sciences Network (ESNet).
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OpenFlow assisted online defragmentation in single multi domain software defined elastic optical networks invited
IEEE\ OSA Journal of Optical Communications and Networking, 2015Co-Authors: Zuqing Zhu, Lei Liu, Mingyang Zhang, Xiaoliang Chen, Cen Chen, S J B YooAbstract:Spectrum fragmentation limits the efficiency of spectrum utilization in elastic optical networks (EONs). This paper studies how to take advantage of the centralized network control and management provided by software-defined EONs (SD-EONs) for realizing OpenFlow-assisted implementation of online defragmentation (DF). We first discuss the overall system design and OpenFlow protocol extensions to support efficient online DF and conduct DF experiments with routing and spectrum assignment (RSA) reconfigurations in a single-domain SD-EON. Then, we propose to realize fragmentation-aware RSA (FA-RSA) in multi-domain SD-EONs with the cooperation of multiple OpenFlow controllers. In order to provision inter-domain lightpaths with restricted domain visibility on intradomain resource utilization, we design and implement an inter-domain protocol to facilitate FA-RSA in multi-domain SD-EONs and demonstrate controlling the spectrum fragmentation on inter-domain links with FA-RSA. Our experimental results indicate that the OpenFlow-controlled DF systems perform well and can improve the performance of SD-EONs effectively.
Takehiro Tsuritani - One of the best experts on this subject based on the ideXlab platform.
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Dynamic OpenFlow-controlled optical packet switching network
Journal of Lightwave Technology, 2015Co-Authors: Xiaoyuan Cao, Takaya Miyazawa, Masaki Shiraiwa, Noboru Yoshikane, Masatoshi Suzuki, Takehiro Tsuritani, Itsuro Morita, Naoki WadaAbstract:This paper presents and experimentally demonstrates the generalized architecture of OpenFlow-controlled optical packet switching (OPS) network. OpenFlow control is enabled by introducing the OpenFlow/OPS agent into the OPS network, which realizes the OpenFlow protocol translation and message exchange between the OpenFlow control plane and the underlying OPS nodes. With software-defined networking (SDN) and OpenFlow technique, the complex control functions of the conventional OPS network can be offloaded into a centralized and flexible control plane, while promoted control and operations can be provided due to centralized coordination of network resources. Furthermore, a contention-aware routing/rerouting strategy as well as a fast network adjustment mechanism is proposed and demonstrated for the first time as advanced OpenFlow control to route traffic and handle the network dynamics. With centralized SDN/OpenFlow control, the OPS network has the potential to have better resource utilization and enhanced network resilience at lower cost and less node complexity. Our work will accelerate the development of both OPS and SDN evolution.
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field trial of an OpenFlow based unified control plane for multilayer multigranularity optical switching networks
Journal of Lightwave Technology, 2013Co-Authors: Dongxu Zhang, Linfeng Hong, Ricard Vilalta, Ramon Casellas, Ricardo Martínez, Jian Wu, Takehiro Tsuritani, Itsuro Morita, Raül MuñozAbstract:Software defined networking and OpenFlow, which allow operators to control the network using software running on a network operating system within an external controller, provide the maximum flexibility for the operator to control a network, and match the carrier's preferences given its centralized architecture, simplicity, and manageability. In this paper, we report a field trial of an OpenFlow-based unified control plane (UCP) for multilayer multigranularity optical switching networks, verifying its overall feasibility and efficiency, and quantitatively evaluating the latencies for end-to-end path creation and restoration. To the best of our knowledge, the field trial of an OpenFlow-based UCP for optical networks is a world first.
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experimental validation and performance evaluation of OpenFlow based wavelength path control in transparent optical networks
Optics Express, 2011Co-Authors: Lei Liu, Itsuro Morita, Takehiro Tsuritani, Hongxiang GuoAbstract:OpenFlow, as an open-source protocol for network virtualization, is also widely regarded as a promising control plane technique for heterogeneous networks. But the utilization of the OpenFlow protocol to control a wavelength switched optical network has not been investigated. In this paper, for the first time, we experimentally present a proof-of-concept demonstration of OpenFlow-based wavelength path control for lightpath provisioning in transparent optical networks. We propose two different approaches (sequential and delayed approaches) for lightpath setup and two different approaches (active and passive approaches) for lightpath release by using the OpenFlow protocol. The overall feasibility of these approaches is experimentally validated and the network performances are quantitatively evaluated. More importantly, all the proposed methodologies are demonstrated and evaluated on a real transparent optical network testbed with both OpenFlow-based control plane and data plane, which allows their feasibility and effectiveness to be verified, and valuable insights of the proposed solutions to be obtained for deploying into real OpenFlow controlled optical networks.
Itsuro Morita - One of the best experts on this subject based on the ideXlab platform.
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Dynamic OpenFlow-controlled optical packet switching network
Journal of Lightwave Technology, 2015Co-Authors: Xiaoyuan Cao, Takaya Miyazawa, Masaki Shiraiwa, Noboru Yoshikane, Masatoshi Suzuki, Takehiro Tsuritani, Itsuro Morita, Naoki WadaAbstract:This paper presents and experimentally demonstrates the generalized architecture of OpenFlow-controlled optical packet switching (OPS) network. OpenFlow control is enabled by introducing the OpenFlow/OPS agent into the OPS network, which realizes the OpenFlow protocol translation and message exchange between the OpenFlow control plane and the underlying OPS nodes. With software-defined networking (SDN) and OpenFlow technique, the complex control functions of the conventional OPS network can be offloaded into a centralized and flexible control plane, while promoted control and operations can be provided due to centralized coordination of network resources. Furthermore, a contention-aware routing/rerouting strategy as well as a fast network adjustment mechanism is proposed and demonstrated for the first time as advanced OpenFlow control to route traffic and handle the network dynamics. With centralized SDN/OpenFlow control, the OPS network has the potential to have better resource utilization and enhanced network resilience at lower cost and less node complexity. Our work will accelerate the development of both OPS and SDN evolution.
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field trial of an OpenFlow based unified control plane for multilayer multigranularity optical switching networks
Journal of Lightwave Technology, 2013Co-Authors: Dongxu Zhang, Linfeng Hong, Ricard Vilalta, Ramon Casellas, Ricardo Martínez, Jian Wu, Takehiro Tsuritani, Itsuro Morita, Raül MuñozAbstract:Software defined networking and OpenFlow, which allow operators to control the network using software running on a network operating system within an external controller, provide the maximum flexibility for the operator to control a network, and match the carrier's preferences given its centralized architecture, simplicity, and manageability. In this paper, we report a field trial of an OpenFlow-based unified control plane (UCP) for multilayer multigranularity optical switching networks, verifying its overall feasibility and efficiency, and quantitatively evaluating the latencies for end-to-end path creation and restoration. To the best of our knowledge, the field trial of an OpenFlow-based UCP for optical networks is a world first.
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experimental validation and performance evaluation of OpenFlow based wavelength path control in transparent optical networks
Optics Express, 2011Co-Authors: Lei Liu, Itsuro Morita, Takehiro Tsuritani, Hongxiang GuoAbstract:OpenFlow, as an open-source protocol for network virtualization, is also widely regarded as a promising control plane technique for heterogeneous networks. But the utilization of the OpenFlow protocol to control a wavelength switched optical network has not been investigated. In this paper, for the first time, we experimentally present a proof-of-concept demonstration of OpenFlow-based wavelength path control for lightpath provisioning in transparent optical networks. We propose two different approaches (sequential and delayed approaches) for lightpath setup and two different approaches (active and passive approaches) for lightpath release by using the OpenFlow protocol. The overall feasibility of these approaches is experimentally validated and the network performances are quantitatively evaluated. More importantly, all the proposed methodologies are demonstrated and evaluated on a real transparent optical network testbed with both OpenFlow-based control plane and data plane, which allows their feasibility and effectiveness to be verified, and valuable insights of the proposed solutions to be obtained for deploying into real OpenFlow controlled optical networks.
