Journal of Optical Communications and Networking最新文献_第8页

Centralized and distributed approaches to control optical point-to-multipoint systems near-real-time 近实时控制光点对点多点系统的集中式和分布式方法

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-26 DOI: 10.1364/JOCN.516137

H. Shakespear-Miles;Q. Lin;S. Barzegar;M. Ruiz;X. Chen;L. Velasco

{"title":"Centralized and distributed approaches to control optical point-to-multipoint systems near-real-time","authors":"H. Shakespear-Miles;Q. Lin;S. Barzegar;M. Ruiz;X. Chen;L. Velasco","doi":"10.1364/JOCN.516137","DOIUrl":"10.1364/JOCN.516137","url":null,"abstract":"Optical point-to-multipoint (P2MP) connectivity based on digital subcarrier multiplexing (DSCM) has been shown as a solution for the metro-access segment that is able to reduce capital and operational costs and support the capacity and high dynamicity needs of future 6G services. To achieve maximum performance, activation and deactivation of subcarriers must be done near-real-time to provide just the capacity needed to support the input traffic. In this paper, we investigate the applicability of various approaches capable of supporting the near-real-time operation requirement. Starting from the centralized approach that can be carried out on the centralized software-defined networking (SDN) controller, we also explore distributed approaches that might relieve the SDN controller from near-real-time operation. In particular, we explore the performance of deploying a multiagent system (MAS), where intelligent agents run on top of the nodes in the P2MP tree and communicate among them. Illustrative results show that the distributed approaches can achieve a performance close to that of the centralized one, while reducing communication needs. Results also show the importance of traffic/capacity prediction to anticipate the activation of subcarriers.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140223444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biphase routing scheme for optimal throughput in large-scale optical satellite networks 在大规模光学卫星网络中实现最佳吞吐量的双相路由选择方案

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-25 DOI: 10.1364/JOCN.514819

Yunxiao Ning;Yongli Zhao;Avishek Nag;Hua Wang;Jie Zhang

{"title":"Biphase routing scheme for optimal throughput in large-scale optical satellite networks","authors":"Yunxiao Ning;Yongli Zhao;Avishek Nag;Hua Wang;Jie Zhang","doi":"10.1364/JOCN.514819","DOIUrl":"10.1364/JOCN.514819","url":null,"abstract":"In the large-scale optical satellite network (LS-OSN), hundreds to thousands of low Earth orbit (LEO) satellites will be interconnected via laser links, offering global coverage characterized by high throughput and low latency. LS-OSNs present an attractive strategy to cultivate a comprehensively connected, intelligent world. However, the dynamic nature of the satellites, as they orbit the Earth, results in frequent changes in the LS-OSN topology. Thus, there is a pressing need for efficient routing algorithms that not only cater to massive traffic demands but also swiftly adapt to these constant topological changes. Traditional routing algorithms for services with specific bandwidth requirements often compromise on either computational speed or throughput efficiency. In response, this study introduces a routing scheme based on flow optimization and decomposition (FOND). This seeks to shorten the computation time while preserving optimal network throughput. Expanding upon the FOND scheme, we further devised two heuristic algorithms: the flow-based greedy path (FGP) and the flow-based greedy width (FGW). Simulation results from a 288-satellite constellation network indicate that both the FGP and FGW outpace contemporary methods in terms of the routing computation time while maintaining a consistent throughput equal to 100% of the network capacity. Notably, the FGP has exhibited an impressive capability, reducing the routing computation time to 0.23% compared to the baseline incremental-widest-path (IWP) algorithm, which operates on Dijkstra’s algorithm principles.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140224593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Semi-supervised learning model synergistically utilizing labeled and unlabeled data for failure detection in optical networks 半监督学习模型协同利用标记和非标记数据进行光网络故障检测

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-24 DOI: 10.1364/JOCN.516128

Zhiming Sun;Chunyu Zhang;Min Zhang;Bing Ye;Danshi Wang

{"title":"Semi-supervised learning model synergistically utilizing labeled and unlabeled data for failure detection in optical networks","authors":"Zhiming Sun;Chunyu Zhang;Min Zhang;Bing Ye;Danshi Wang","doi":"10.1364/JOCN.516128","DOIUrl":"10.1364/JOCN.516128","url":null,"abstract":"In optical networks, reliable failure detection is essential for maintaining quality of service. The methodology has evolved from traditional performance threshold-driven approaches to contemporary data-driven AI algorithms, predominantly employing supervised and unsupervised learning. However, with the advent of second-level telemetry, optical transport networks have amassed a wealth of unlabeled performance data, while labeled data remains limited due to the intensive effort required for annotation. In this scenario, to address the challenges of scarce labeled data in supervised learning and the accuracy issues in unsupervised methods, we propose an OpenFE-VIME semi-supervised model. This model synergizes the robustness of supervised approaches with the flexibility of unsupervised approaches. It not only leverages the abundant reservoir of unlabeled data but also addresses the challenges posed by the limited availability of labeled data, enabling reliable and efficient failure detection. Upon evaluation using performance data from OTN node devices in the operator’s optical backbone network, the OpenFE-VIME model demonstrates remarkable performance, achieving an F1-score of 0.947 and accuracy of 0.946, while significantly reducing false negative and false positive rates to 0.073 and 0.035, respectively. Moreover, our research explores the model’s capabilities in utilizing both labeled and unlabeled data and investigates the threshold for training convergence across various data ratios. Additionally, the model’s internal mechanisms and decision-making processes are interpreted using t-SNE visualization, offering enhanced insights into its operational efficacy.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140224246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reliable and efficient RAR-based distributed model training in computing power network 计算力网络中基于 RAR 的可靠高效分布式模型训练

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-23 DOI: 10.1364/JOCN.511165

Ling Chen;Yajie Li;Carlos Natalino;Yongcheng Li;Boxin Zhang;Yingbo Fan;Wei Wang;Yongli Zhao;Jie Zhang

{"title":"Reliable and efficient RAR-based distributed model training in computing power network","authors":"Ling Chen;Yajie Li;Carlos Natalino;Yongcheng Li;Boxin Zhang;Yingbo Fan;Wei Wang;Yongli Zhao;Jie Zhang","doi":"10.1364/JOCN.511165","DOIUrl":"10.1364/JOCN.511165","url":null,"abstract":"The computing power network (CPN) is a novel network technology that integrates computing power from the cloud, edge, and terminals using IP/optical cross-layer networks for distributed computing. CPNs can provide an effective solution for distributed model training (DMT). As a bandwidth optimization architecture based on data parallelism, ring all-reduce (RAR) is widely used in DMT. However, any node or link failure on the ring can interrupt or block the requests deployed on the ring. Meanwhile, due to the resource competition of batch RAR-based DMT requests, inappropriate scheduling strategies will also lead to low training efficiency or congestion. As far as we know, there is currently no research that considers the survivability of rings in scheduling strategies for RAR-based DMT. To fill this gap, we propose a scheduling scheme for RAR-based DMT requests in CPNs to optimize the allocation of computing and wavelength resources considering the time dimension while ensuring reliability. In practical scenarios, service providers may focus on different performance metrics. We formulate an integer linear programming (ILP) model and a RAR-based DMT deployment algorithm (RDDA) to solve this problem considering four optimization objectives under the premise of the minimum blocking rate: minimum computing resource consumption, minimum wavelength resource consumption, minimum training time, and maximum reliability. Simulation results demonstrate that our model satisfies the reliability requirements while achieving corresponding optimal performance for DMT requests under four optimization objectives.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140230938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Upgrading strategies for long-haul quantum key distribution networks 长途量子密钥分发网络的升级策略 [特邀]

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-15 DOI: 10.1364/JOCN.513632

Mario Wenning;Maria Samonaki;Sai Kireet Patri;Tobias Fehenberger;Helmut Griesser;Carmen Mas-Machuca

引用次数: 0

ML approaches for OTDR diagnoses in passive optical networks—event detection and classification: ways for ODN branch assignment (ECOC 20 ) 用于无源光网络中 OTDR 诊断的 ML 方法 ̶ 事件检测和分类 ̶ ODN 分支分配的方法

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-15 DOI: 10.1364/JOCN.516659

Michael Straub;Johannes Reber;Tarek Saier;Robert Borkowski;Shi Li;Dmitry Khomchenko;Andre Richter;Michael Farber;Tobias Kafer;Rene Bonk

引用次数: 0

Introduction to the ONDM 2023 special issue ONDM 2023 特刊简介

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-15 DOI: 10.1364/JOCN.525183

Teresa Gomes;David Larrabeiti-Lopez;Carmen Mas-Machuca;Luca Valcarenghi

引用次数: 0

Physical-layer-aware multi-band optical network planning framework for rate-adaptive transceivers 速率自适应收发器的物理层感知多波段光网络规划框架

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-10 DOI: 10.1364/JOCN.514026

Jasper Muller;Gabriele Di Rosa;Ognjen Jovanovic;Mario Wenning;Achim Autenrieth;Jorg-Peter Elbers;Carmen Mas-Machuca

{"title":"Physical-layer-aware multi-band optical network planning framework for rate-adaptive transceivers","authors":"Jasper Muller;Gabriele Di Rosa;Ognjen Jovanovic;Mario Wenning;Achim Autenrieth;Jorg-Peter Elbers;Carmen Mas-Machuca","doi":"10.1364/JOCN.514026","DOIUrl":"10.1364/JOCN.514026","url":null,"abstract":"Flexible-grid elastic optical networks (EONs) have recently been widely deployed to support the growing demand for bandwidth-intensive applications. For cost-efficient scaling of the network capacity, multi-band systems are a promising solution. Optimized utilization of EONs is required to delay cost-extensive network upgrades and to lower cost and power consumption. Next-generation bandwidth-variable transceivers (BVTs) will offer increased adaptivity in symbol rate and modulation through techniques such as probabilistic shaping (PS). In this work, we investigate the impact of increased configuration granularity on optical networks. We account for practical implementation considerations of BVT configurations for estimating the required signal-to-noise ratio. Additionally, an optimization algorithm is presented that selects the most efficient configuration for each considered data rate and bandwidth combination. We utilize advanced quality of transmission estimation modeling to evaluate PS configurations in multi-band systems with optimized launch power distributions. We present results of network planning studies for C-band systems in a national and a continental optical backbone network topology considering different granularities of the configurations. Our analysis confirms that finer modulation-based rate-adaptivity results in substantial resource savings, decreasing the number of necessary lightpaths by at most 13% in C-band EONs. Additional savings are observed in multi-band systems, showing further increased savings in the number of required lightpaths of up to 20%. In contrast, increased symbol rate granularity only results in minor savings.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140233031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Local and global optimization methods for optical line control based on quality of transmission 基于传输质量的光线路控制局部和全局优化方法

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-09 DOI: 10.1364/JOCN.512049

Giacomo Borraccini;Stefano Straullu;Andrea D'Amico;Francesco Aquilino;Stefano Piciaccia;Alberto Tanzi;Gabriele Galimberti;Vittorio Curri

{"title":"Local and global optimization methods for optical line control based on quality of transmission","authors":"Giacomo Borraccini;Stefano Straullu;Andrea D'Amico;Francesco Aquilino;Stefano Piciaccia;Alberto Tanzi;Gabriele Galimberti;Vittorio Curri","doi":"10.1364/JOCN.512049","DOIUrl":"10.1364/JOCN.512049","url":null,"abstract":"The ever-increasing demand for data traffic in recent decades has pushed network operators to give importance to the aspect of infrastructure control to facilitate its scalability and maximize its capacity. A generic lightpath (LP) is deployed starting from a traffic request between a given pair of nodes in a network. LPs are operated in the network based on an estimate of the quality of transmission (QoT), which is derived from the physical layer characteristics of a selected route. Regardless of the model used to estimate QoT, it is necessary to calibrate the model to maximize its accuracy and define minimum design margins. The model calibration process depends significantly on the type of data that can be collected in the field (i.e., type of metric, resolution) and therefore on the available monitoring devices. In this work, a systematic evaluation of the QoT estimation is carried out on a multi-span erbium-doped-fiber-amplified optical line system (OLS) using in the first case only total power monitors and in the second experimentally emulating optical channel monitors (OCMs). Given the type of monitoring devices available, three different physical models are calibrated, and six optimization methods are used to define the optimal configuration of the target gain and tilt parameters of the optical amplifiers, jointly optimizing the working point of all amplifiers (global approach) or proceeding span by span (local approach). Subsequently, the OLS was set in each configuration obtained, and the generalized signal-to-noise ratio (GSNR) profile was measured at the end.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140232445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scheme of carrier cooperation with coordinated scheduling for faster and lower-cost failure/disaster recovery 一种新颖的承运人合作与协调调度方案，可实现更快、成本更低的故障/灾难恢复

IF 5 2区计算机科学

Journal of Optical Communications and Networking Pub Date : 2024-04-08 DOI: 10.1364/JOCN.513526

Sugang Xu;Subhadeep Sahoo;Sifat Ferdousi;Noboru Yoshikane;Masaki Shiraiwa;Yusuke Hirota;Massimo Tornatore;Takehiro Tsuritani;Yoshinari Awaji;Biswanath Mukherjee

引用次数: 0