IEEE/OSA Journal of Optical Communications and Networking最新文献_第2页

Network architecture in the Era of integrated optics 集成光学时代的网络架构

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2018-03-11 DOI: 10.1364/OFC.2018.M3J.7

C. Minkenberg, N. Kucharewski, G. Rodríguez

{"title":"Network architecture in the Era of integrated optics","authors":"C. Minkenberg, N. Kucharewski, G. Rodríguez","doi":"10.1364/OFC.2018.M3J.7","DOIUrl":"https://doi.org/10.1364/OFC.2018.M3J.7","url":null,"abstract":"The reach of electric transmission lines has been shrinking with the increase of per-lane signaling rates, causing the proportion of ports that need to be optical to increase substantially. At the same time, the cost of switch ports has dropped faster than the cost of optics has, leading to a situation where the cost of the data center's network is no longer dominated by the switches but instead by the optics. We propose high-level models expressing total network cost per billions of bits per second (Gbps) per endpoint, capturing the essential cost/performance trade-offs between switch ports and optics that drives the decision of choosing one architecture over another. Given the switch radix and the target network scale, our model yields the lowest-cost Folded Clos topology for given values of the relative cost between electrical switch ports and optical ports. We also consider the potential impact of employing integrated, co-packaged optics, which opens a new space of architectural choices with the potential for significant cost and energy savings. Our analysis reveals that the conventional wisdom that \"a larger switch radix is always better\" does not always hold true; in some scenarios, smaller-radix devices can achieve the same scale while enabling lower cost and lower power per port. Moreover, we find that integrated optics enables a repartitioning of functionality that gives rise to a new class of switch architecture that minimizes total per-endpoint network cost.","PeriodicalId":371742,"journal":{"name":"IEEE/OSA Journal of Optical Communications and Networking","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123764053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

QoS-aware protection in flexgrid optical networks 柔性网格光网络中的qos感知保护

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2017-03-19 DOI: 10.1364/OFC.2017.TH3K.4

P. Layec, A. Dupas, A. Bisson, S. Bigo

{"title":"QoS-aware protection in flexgrid optical networks","authors":"P. Layec, A. Dupas, A. Bisson, S. Bigo","doi":"10.1364/OFC.2017.TH3K.4","DOIUrl":"https://doi.org/10.1364/OFC.2017.TH3K.4","url":null,"abstract":"Elastic optical networks generally rely on protection and restoration mechanisms to prevent the detrimental effect of fiber cuts. In particular, we investigate optical protection in flexgrid optical networks where the symbol rate is varied as a complementary approach to modulation format. We propose a novel protection scenario, whereby premium traffic survives cuts with just-enough bandwidth, which we call \"quality-of-service-aware protection\" (QoS-aware protection). The proposed mechanism exploits a variable baud rate transponder in order to reduce the spectrum occupancy of the protecting path and to ease the establishment of new traffic demands. Equipped with two lasers and optical switches, the QoS-aware node allows fast switching between different working and protecting bit rates. The two wavelengths also help to reduce the spectrum fragmentation. We compute typical spectral usage boosted by 80% to protect 25% of premium traffic with respect to current 1 + 1 protection. We demonstrate a field programmable gate array (FPGA)-based proof-of-concept node of QoS-aware protection that reconfigures in <2.8 ms. We program and select the ratio of premium versus best effort traffic as a tunable input parameter of the proof-of-concept.","PeriodicalId":371742,"journal":{"name":"IEEE/OSA Journal of Optical Communications and Networking","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131358553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Learning process for reducing uncertainties on network parameters and design margins 减少网络参数和设计余量不确定性的学习过程

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2017-03-19 DOI: 10.1364/OFC.2017.W4F.6

E. Seve, J. Pesic, C. Delezoide, Y. Pointurier

引用次数: 64

Virtual network topology adaptability based on data analytics for traffic prediction 基于数据分析的虚拟网络拓扑适应性流量预测

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2017-01-26 DOI: 10.1364/JOCN.9.000A35

Fernando Morales, M. Ruiz, L. Gifre, L. Contreras, V. López, L. Velasco

{"title":"Virtual network topology adaptability based on data analytics for traffic prediction","authors":"Fernando Morales, M. Ruiz, L. Gifre, L. Contreras, V. López, L. Velasco","doi":"10.1364/JOCN.9.000A35","DOIUrl":"https://doi.org/10.1364/JOCN.9.000A35","url":null,"abstract":"The introduction of new services requiring large and dynamic bitrate connectivity can cause changes in the direction of the traffic in metro and even core network segments throughout the day. This leads to large overprovisioning in statically managed virtual network topologies (VNTs), which are designed to cope with the traffic forecast. To reduce expenses while ensuring the required grade of service, in this paper we propose a VNT reconfiguration approach based on data analytics for traffic prediction (VENTURE). It regularly reconfigures the VNT based on the predicted traffic, thus adapting the topology to both the current and the predicted traffic volume and direction. A machine learning algorithm based on an artificial neural network is used to provide robust and adaptive traffic models. The reconfiguration problem that takes as its input the traffic prediction is modeled mathematically, and a heuristic is proposed to solve it in practical times. To support VENTURE, we propose an architecture that allows collecting and storing data from monitoring at the routers and that is used to train predictive models for every origin-destination pair. Exhaustive simulation results of the algorithm, together with the experimental assessment of the proposed architecture, are finally presented.","PeriodicalId":371742,"journal":{"name":"IEEE/OSA Journal of Optical Communications and Networking","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130115895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 103

Fair bandwidth allocation algorithm for PONS based on network utility maximization 基于网络效用最大化的PONS公平带宽分配算法

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2017-01-26 DOI: 10.1364/JOCN.9.000075

N. Merayo, P. Pavón-Mariño, J. Aguado, R. Durán, F. Burrull, V. Bueno-Delgado

{"title":"Fair bandwidth allocation algorithm for PONS based on network utility maximization","authors":"N. Merayo, P. Pavón-Mariño, J. Aguado, R. Durán, F. Burrull, V. Bueno-Delgado","doi":"10.1364/JOCN.9.000075","DOIUrl":"https://doi.org/10.1364/JOCN.9.000075","url":null,"abstract":"Network utility maximization (NUM) models have been successfully applied to address multiple resource- allocation problems in communication networks. This paper explores, for the first time to our knowledge, their application to modeling the bandwidth-allocation problem in passive optical networks (PONs) and long-reach PONs. Using the NUM model, we propose the FEx-DBA (fair excess-dynamic bandwidth allocation) algorithm, a new DBA scheme to allow a fair and efficient allocation of the upstream channel capacity. The NUM framework provides the mathematical support to formally define the fairness concept in the resource allocation and the guidelines to devise FEx-DBA. A simulation study is conducted, whereby FEx-DBA is compared to a state-of-the-art proposal. We show that FEx-DBA (i) provides bandwidth guarantees to the users according to the service level agreement (SLA) contracted and fairly distributes the excess bandwidths among them; (ii) has a stable response and fast convergence when traffic or SLAs change, avoiding the oscillations appearing in other proposals; (iii) improves average delay and jitter measures; and (iv) only depends on a reduced set of parameters, which can be easily tuned.","PeriodicalId":371742,"journal":{"name":"IEEE/OSA Journal of Optical Communications and Networking","volume":"325 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133400955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Soft-stacked PON for soft C-RAN 软堆叠PON用于软C-RAN

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2016-11-01 DOI: 10.1364/JOCN.8.000B12

Weisheng Hu, L. Yi, Hao He, Xuelin Yang, Zhengxuan Li, Meihua Bi, Kuo Zhang, Haiyun Xin, Yuan Liu, W. Du

{"title":"Soft-stacked PON for soft C-RAN","authors":"Weisheng Hu, L. Yi, Hao He, Xuelin Yang, Zhengxuan Li, Meihua Bi, Kuo Zhang, Haiyun Xin, Yuan Liu, W. Du","doi":"10.1364/JOCN.8.000B12","DOIUrl":"https://doi.org/10.1364/JOCN.8.000B12","url":null,"abstract":"Cloud radio access networks (C-RANs) feature central pooling baseband processing units (BBUs) and lowcost remote radio headends (RRHs) with fiber-connected fronthauls between them, and they are promising for 4G. Researchers are redesigning the C-RAN with different split approaches to relax the fronthaul capacity for 5G with massive antennas, which is termed soft C-RAN. In this paper, we propose a soft-stacked passive optical network (PON) to support the soft C-RAN as an integrated solution. Two approaches are investigated in this paper. The first one is realized by employing an arrayed waveguide grating router (AWGR) and directly modulated tunable lasers, and it is promising for digital fronthaul and midhaul transmission and switching. The second is realized by employing wavelength-selective switches (WSSs) to allocate one-toone and many-to-many connections, and it is promising for analog fronthaul transmission and switching. Their performances are analyzed and measured with directly modulated lasers (DMLs) that are either fixed or tunable. A delay interferometer is used for the DMLs' chirp and fiber dispersion management. The result is significant for future soft C-RANs and stacked PON.","PeriodicalId":371742,"journal":{"name":"IEEE/OSA Journal of Optical Communications and Networking","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123081305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Synchronization in a random length ring network for SND-controlled optical TDM switching 随机长度环网中snd控制光TDM交换的同步

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2016-10-04 DOI: 10.1364/JOCN.9.000A26

V. Kamchevska, V. Cristofori, Francesco Da Ros, B. Guo, C. Jackson, A. M. Fagertun, S. Ruepp, R. Nejabati, D. Simeonidou, L. Dittmann, M. Berger, L. Oxenløwe, M. Galili

{"title":"Synchronization in a random length ring network for SND-controlled optical TDM switching","authors":"V. Kamchevska, V. Cristofori, Francesco Da Ros, B. Guo, C. Jackson, A. M. Fagertun, S. Ruepp, R. Nejabati, D. Simeonidou, L. Dittmann, M. Berger, L. Oxenløwe, M. Galili","doi":"10.1364/JOCN.9.000A26","DOIUrl":"https://doi.org/10.1364/JOCN.9.000A26","url":null,"abstract":"In this paper we focus on optical time division multiplexed (TDM) switching and its main distinguishing characteristics compared with other optical subwavelength switching technologies.We review and discuss in detail the synchronization requirements that allow for proper switching operation. In addition, we propose a novel synchronization algorithm that enables automatic synchronization of software defined networking controlled all-optical TDM switching nodes connected in a ring network. Besides providing synchronization, the algorithmalso can facilitate dynamic slot size change and failure detection. We experimentally validate the algorithm behavior and achieve correct operation for three different ring lengths. Moreover,we experimentally demonstrate data plane connectivity in a ring network composed of three nodes and show successful wavelength division multiplexing space division multiplexing transmission and switching of data bursts when using the proposed algorithm to provide synchronization.","PeriodicalId":371742,"journal":{"name":"IEEE/OSA Journal of Optical Communications and Networking","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131245158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Spectrum allocation strategy in flex-grid optical networks: Signal transmission performance analysis 柔性网格光网络中的频谱分配策略:信号传输性能分析

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2016-07-01 DOI: 10.1364/JOCN.8.00A191

Liangjia Zong

引用次数: 1

Add and drop architectures for multi-carrier transponders in EONs 为eon中的多载波转发器添加和删除架构

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2016-07-01 DOI: 10.1364/JOCN.8.000A12

M. Dallaglio, T. Zami, N. Sambo, A. Giorgetti, A. Pagano, E. Riccardi, P. Castoldi

{"title":"Add and drop architectures for multi-carrier transponders in EONs","authors":"M. Dallaglio, T. Zami, N. Sambo, A. Giorgetti, A. Pagano, E. Riccardi, P. Castoldi","doi":"10.1364/JOCN.8.000A12","DOIUrl":"https://doi.org/10.1364/JOCN.8.000A12","url":null,"abstract":"The elastic optical network (EON) is a paradigm for optical networks, based on the combination of a flexible grid, advanced transmission techniques, and bandwidth-variable optical switching. Recent studies on EONs have been focused on multi-carrier transponders with coherent detection. Such transponders can achieve high-rate (e.g., 1 Tb/s) lightpaths through super-channels. A particular case of the multi-carrier transponder is the sliceable bandwidth variable transponder (S-BVT) where the generated flows can also be routed onto different paths and toward different destinations. The add and drop (A&D) module connecting transponders to the optical cross connect plays an important role in the design of the network node. In particular, depending on the A&D architecture, the flexibility provided by the multi-carrier transponder and the S-BVTs may be partially limited. This paper gives first a technological overview of different A&D architectures. In particular, the coupler/splitter, multicast switch, and wavelength-selective switch technologies for A&D are reviewed. Then, we investigate how different A&D architectures influence the benefit of elastic spectral efficiency in a long-haul meshed network scenario, looking for a trade-off between costs and performance.","PeriodicalId":371742,"journal":{"name":"IEEE/OSA Journal of Optical Communications and Networking","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115506935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Multiperiod IP-over-elastic network reconfiguration with adaptive bandwidth resizing and modulation 具有自适应带宽调整和调制的多周期IP-over-elastic网络重构

IEEE/OSA Journal of Optical Communications and Networking Pub Date : 2016-07-01 DOI: 10.1364/JOCN.8.00A180

Takafumi Tanaka, Tetsuro Inui, A. Kadohata, W. Imajuku, A. Hirano

{"title":"Multiperiod IP-over-elastic network reconfiguration with adaptive bandwidth resizing and modulation","authors":"Takafumi Tanaka, Tetsuro Inui, A. Kadohata, W. Imajuku, A. Hirano","doi":"10.1364/JOCN.8.00A180","DOIUrl":"https://doi.org/10.1364/JOCN.8.00A180","url":null,"abstract":"Elastic optical networks (EONs) represent a promising network architecture that accommodates a wide variety of traffic demands in the optical layer. Thanks to the functionality of bandwidth flexibility of elastic optical paths, we can now accommodate IP traffic directly into the optical layer by configuring, for example, the modulation format and subcarrier counts to client demands (optical path demands). At the same time, to accommodate temporally and geographically changing IP traffic demands efficiently in optical networks, cooperation between the IP and optical layers is essential. This paper proposes a multilayer network reconfiguration algorithm that supports periodically changing IP traffic patterns. We incorporate two schemes, which make IP over EONs more flexible, into the heuristic iterative multilayer network reconfiguration algorithm (IMNR). The first scheme involves bandwidth resizing achieved through subcarrier expansion and reduction, and the second employs energy-efficient adaptive modulation according to the data rate and distance of the client demands. We evaluated the impact of the following on energy efficiency: the IMNR algorithm, the proposed adaptive bandwidth resizing and modulation schemes, and some multicarrier-based transponder architectures including bandwidth-variable transponder (BVT) and sliceable BVT (SBVT). The evaluation results show that the IMNR algorithm with the proposed schemes significantly reduces the energy consumption compared with traditional network planning schemes and equipment.","PeriodicalId":371742,"journal":{"name":"IEEE/OSA Journal of Optical Communications and Networking","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133953586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15