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2022 International Conference on Optical Network Design and Modeling (ONDM)最新文献

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Towards Regeneration in Flexible Optical Network Planning 论柔性光网络规划中的再生问题
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782815
Saquib Amjad, S. Patri, C. M. Machuca
In optical networks, the reach of the optical signal is controlled by the receiver’s capability to successfully receive the signal, degraded due to optical impairments and noise. This reach can be extended by using regeneration at intermediate nodes. Efficient placement and minimization of the number of regenerators is referred to as the regenerator placement problem. This paper proposes a method to solve the regenerator placement problem in a multiperiod planning scenario with the objective of maximizing throughput with minimum lightpaths. The paper addresses regenerator placement in two phases, a preselection of possible locations for regeneration based on OSNR constraints, and provisioning a combination of regenerated and non-regenerated lightpaths. The provisioning formulation focuses on minimizing the number of transceivers while maximizing the datarate. We demonstrate the advantage of our approach compared to state-of-the-art methods in terms of throughput, underprovisioning and number of transceivers on 3 different topologies. Our results show that the proposed solution is able to meet the dynamic traffic with lower underprovisioning.
在光网络中,光信号的到达是由接收器成功接收信号的能力控制的,由于光损伤和噪声而降低。这个范围可以通过在中间节点使用再生来扩展。蓄热器的有效安置和数量的最小化被称为蓄热器安置问题。本文提出了一种以最小光路最大化吞吐量为目标的多周期规划场景下蓄热器布局问题的解决方法。本文分两个阶段讨论了再生器的放置,基于OSNR约束的再生可能位置的预选,以及提供再生和非再生光路的组合。配置公式的重点是尽量减少收发器的数量,同时最大限度地提高数据容量。我们在吞吐量、供应不足和3种不同拓扑上的收发器数量方面展示了与最先进的方法相比,我们的方法的优势。结果表明,该解决方案能够满足动态流量的需求,且不足程度较低。
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引用次数: 5
Optical sensing in urban areas by deployed telecommunication fiber networks 部署电信光纤网络在城市地区的光传感
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782848
P. Boffi, M. Ferrario, I. D. Luch, G. Rizzelli, R. Gaudino
The telecommunication fiber network already deployed in urban areas provides an added value to the optical asset itself, allowing a smart monitoring of our cities in a large scale. It is possible to use deployed PON infrastructures for structural vibration and local seismologic perturbations monitoring. On the other hand, surveillance of the embedded network and real-time safety diagnostic is also possible. The invited talk will present different experimental demonstrations to show the sensing performance by exploiting deployed fiber links, assessing the compatibility with the optical data telecom traffic at very high rate.
已经部署在城市地区的电信光纤网络为光资产本身提供了附加价值,允许对我们的城市进行大规模的智能监控。可以使用部署的PON基础设施进行结构振动和局部地震扰动监测。另一方面,嵌入式网络的监控和实时安全诊断也成为可能。特邀演讲将展示不同的实验演示,通过利用已部署的光纤链路来展示传感性能,评估与高速光数据通信业务的兼容性。
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引用次数: 3
Machine-Learning-Aided Dynamic Reconfiguration in Optical DC/HPC Networks (Invited) 光学DC/HPC网络中的机器学习辅助动态重构(特邀)
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782838
S. Singh, Che-Yu Liu, S. Yoo, R. Proietti
The high bandwidth and low latency requirements of modern computing applications with their dynamic and nonuniform traffic patterns impose severe challenges to current data center (DC) and high performance computing (HPC) networks. Therefore, we present a dynamic network reconfiguration mechanism that could satisfy the time-varying applications’ demands in an optical DC/HPC network. We propose a direct and an indirect topology extraction methods based on a machine learning-aided traffic prediction approach under multi-application scenario. The traffic prediction for topology extraction and bandwidth reconfiguration (PredicTER) method could lead to frequent topology and bandwidth reconfiguration. In contrast, the indirect approach, namely traffic prediction with clustering for topology extraction and bandwidth reconfiguration (PrediCLUSTER), utilizes an unsupervised learning-based clustering model to first associate the predicted traffic to one of possible traffic clusters, and then extracts a common topology for the cluster. This restricts the reconfigured topology set to the number of traffic clusters. Our simulation results show that the time-average of mean packet latencies (and total dropped packets) over 60 seconds of timevarying traffic under the PredicTER, PrediCLUSTER and a static topology are 37.7μs,41.2μs, and 50.2μs (and 37,967, 12,305, and 36,836), respectively. Overall, the PredicTER (and PrediCLUSTER) method(s) can improve the end-to-end packet latency by 24.9% (and 17.8%), and the packet loss rate by −3.1% (and 66.6%), as compared to the static flat Hyper-X-like topology.
现代计算应用的高带宽、低时延需求及其动态、不均匀的流量模式对当前的数据中心(DC)和高性能计算(HPC)网络提出了严峻的挑战。因此,我们提出了一种动态的网络重构机制,可以满足光DC/HPC网络中时变应用的需求。在多应用场景下,提出了一种基于机器学习辅助交通预测方法的直接和间接拓扑提取方法。基于拓扑提取和带宽重构的流量预测(PredicTER)方法可能导致频繁的拓扑和带宽重构。相比之下,间接方法,即流量预测与拓扑提取和带宽重构聚类(PrediCLUSTER),利用基于无监督学习的聚类模型首先将预测的流量关联到一个可能的流量聚类,然后为聚类提取公共拓扑。这将重新配置的拓扑集限制为流量集群的数量。我们的仿真结果表明,在PredicTER、PrediCLUSTER和静态拓扑下,时变流量在60秒内的平均数据包延迟(和总丢弃数据包)的时间平均值分别为37.7μs、41.2μs和50.2μs(和37,967、12,305和36,836)。总的来说,与静态扁平的类似hyper - x的拓扑结构相比,PredicTER(和PrediCLUSTER)方法可以将端到端数据包延迟提高24.9%(和17.8%),丢包率提高- 3.1%(和66.6%)。
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引用次数: 0
SDN Automation for Optical Networks Based on Open APIs and Streaming Telemetry 基于开放api和流遥测的光网络SDN自动化
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782851
J. Pesic, Marina Curtol, Lahcen Abnaou, Abdelali El Imadi, Stefano Morganti
This paper provides an overview of the missing pieces currently preventing effective application of machine learning in the field. We discuss access to field data and we perform a proof of concept for the two SDN automation use cases based on programmable hardware, open APIs and streaming telemetry. The automation workflow with its performance evaluations is also presented
本文概述了目前阻碍机器学习在该领域有效应用的缺失部分。我们讨论了对现场数据的访问,并对基于可编程硬件、开放api和流遥测的两个SDN自动化用例进行了概念验证。给出了自动化工作流程及其性能评价
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引用次数: 1
Prioritizing deployments achieving targeted network performance across a multilayer Pb/s network 优先部署,实现跨多层Pb/s网络的目标网络性能
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782839
Srivatsan Balasubramanian, B. Gangopadhyay, V. Dangui, S. Ahuja, Varun Gupta, G. Pastukhov, Max Noormohammadpour, A. Nikolaidis, Ariyani Copley, Xueqi He, Jiachuan Tian, Jiajia Chen, Arash Vakili, Chiunlin Lim, Guanqing Yan, Anand Gokul, Biao Lu, Debottym Mukherjee
Meta has a large scale backbone infrastructure supporting services with varying QoS requirements. As part of backbone network planning, a capacity plan that differentiates between different classes of services in terms of availability guarantees is generated and scheduled for deployment. Deployment progress is measured traditionally in terms of volumes of capacity deployed. Our work provides insights into the shortcomings of capacity volume driven deployments. We provide a methodology to rank the contribution of each entity pending deployment towards our network performance goals and use this metric to prioritize deployments helping higher classes of services meet their network guarantees earlier in the deployment schedule. By enabling QoS awareness in backbone deployments, we are able to demonstrate a 67% reduction of risk exposure period for high priority services.
Meta拥有大规模的骨干基础设施,支持不同QoS需求的服务。作为骨干网规划的一部分,要生成容量计划,根据可用性保证区分不同类别的服务,并安排部署。传统上,部署进度是根据部署的容量来衡量的。我们的工作深入了解了容量驱动部署的缺点。我们提供了一种方法,对每个待部署实体对我们的网络性能目标的贡献进行排名,并使用该指标来确定部署的优先级,帮助更高级别的服务在部署计划中更早地满足其网络保证。通过在骨干部署中启用QoS感知,我们能够证明高优先级服务的风险暴露期减少了67%。
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引用次数: 1
Quantum Bit Retransmission Using Universal Quantum Copying Machine 使用通用量子复制机的量子比特重传
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782866
M. Iqbal, Luis Velasco, M. Ruiz, A. Napoli, J. Pedro, N. Costa
Quantum internet, which is expected to be a combination of quantum and classical networks, promises to provide information-theoretic security for data exchange. Classical networks have well-established protocols for reliable end-to-end transmission that implicitly make use of duplicating classical bits. However, quantum bits (qubits) cannot be copied due to the no-cloning theorem. In this paper, we take advantage of the principle of creating imperfect clones using a Universal Quantum Copying Machine (UQCM) and propose the Quantum Automatic Repeat Request (QARQ) protocol, inspired by its classical equivalent. A simulation platform has been developed to study the feasibility of QARQ. Results show that our proposal is well suited for applications that are compatible with low fidelity requirements.
量子互联网有望成为量子网络和经典网络的结合,有望为数据交换提供信息理论上的安全性。经典网络已经建立了可靠的端到端传输协议,隐式地利用复制经典比特。然而,由于不可克隆定理,量子比特(量子位)不能被复制。在本文中,我们利用通用量子复制机(UQCM)创建不完美克隆的原理,并在经典对等协议的启发下提出了量子自动重复请求(QARQ)协议。开发了仿真平台,对QARQ的可行性进行了研究。结果表明,我们的方案非常适合与低保真要求兼容的应用。
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引用次数: 2
Transfer learning Aided QoT Computation in Network Operating with the 400ZR Standard 迁移学习辅助400ZR标准下网络QoT计算
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782856
Fehmida Usmani, I. Khan, M. U. Masood, Arsalan Ahmad, Muhammad Shahzad, V. Curri
The current increase in bandwidth-hungry applications and the progressively evolving concept of connected "smart" devices through the internet have increased internet traffic exponentially. To hold this expansion of internet traffic, the network operators insist on the full capacity utilization of already deployed hardware infrastructure. In this context, accurate and earlier calculation of the quality of transmission (QoT) of the lightpaths (LPs) is critical for minimizing the required margins that arise due to the uncertainty in the operating point of network elements. This article proposes a novel framework in which a transfer learning assisted QoT-Estimation (QoT-E) is made. The transfer learning agent acquired the knowledge from a traditional fully operational network operating on C-band and utilized this knowledge to assist the operator in estimating the LP QoT on a state-of-the-art newly functioning network on an extended C-band operating with 400ZR standards. The measurement parameter considered to estimate the QoT of LP is the generalized signal-to-noise ratio (GSNR). The dataset used in this analysis is generated synthetically by utilizing well tested GNPy platform. Promising results are achieved in terms of reducing the overall required margin and better utilization of the residual network capacity.
当前带宽需求巨大的应用程序的增加,以及通过互联网连接的“智能”设备概念的逐步发展,使互联网流量呈指数级增长。为了保持互联网流量的扩张,网络运营商坚持充分利用已部署的硬件基础设施的容量。在这种情况下,准确和早期地计算光路(lp)的传输质量(QoT)对于最小化因网络元件工作点的不确定性而产生的所需余量至关重要。本文提出了一种迁移学习辅助qot -估计(QoT-E)框架。迁移学习代理从传统的c波段全面运行的网络中获取知识,并利用这些知识来帮助作业者估算基于400ZR标准的扩展c波段最新功能网络的LP QoT。估计LP QoT的测量参数是广义信噪比(GSNR)。本分析中使用的数据集是利用经过良好测试的GNPy平台综合生成的。在减少总体所需余量和更好地利用剩余网络容量方面取得了令人满意的结果。
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引用次数: 4
Routed Optical Networking: an alternative architecture for IP+Optical aggregation networks 路由光网络:IP+光聚合网络的另一种架构
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782858
Valerio Viscardi, Dirk Schroetter, Moustafa Kattan
For many years the best strategy to optimize the Total Cost of Ownership (TCO) of an IP+Optical network has been to reduce as much as possible the utilization of IP routers’ switch fabrics and interfaces. This can be achieved by means of optical bypass using Reconfigurable Add/Drop Multiplexers (ROADMs). This strategy comes at the cost of a suboptimal wavelength utilization and longer (on average) optical links, running with a lower OSNR. In this paper we analyse alternative architectures which take advantage of the latest Network Processing Units (NPUs) in IP routers and pluggable 400G DWDM interfaces, which helps reducing the cost associated to packet processing.
多年来,优化IP+光网络的总拥有成本(TCO)的最佳策略是尽可能减少IP路由器的交换结构和接口的利用率。这可以通过使用可重构加/丢复用器(roadm)的光旁路来实现。这种策略的代价是波长利用率不理想,光链路(平均)更长,OSNR更低。在本文中,我们分析了利用IP路由器中最新的网络处理单元(npu)和可插拔的400G DWDM接口的替代架构,这有助于降低与数据包处理相关的成本。
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引用次数: 1
Adaptive Joint Optimization of IT Resources and Optical Spectrum Considering Operation Cost 考虑运营成本的IT资源与光谱自适应联合优化
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782845
T. Miyamura, A. Misawa
We propose an adaptive joint optimization method of IT resources and optical spectrum under time-varying traffic demand in elastic optical networks while avoiding an increase in operation cost. Currently, numerous network services are provided by a service function chain (SFC). Once SFCs are provisioned, an optical path is established to connect the SFC and users. SFCs are placed in one of the candidate datacenters in the network by considering residual IT resources and the location of users. Here, the optimal placement of SFCs can vary due to service demand changes. To maintain network performance, we need to reconfigure network configuration by migrating SFCs and rerouting optical paths. However, such reconfiguration requires additional operation cost. In this paper, we consider the joint optimization problem of IT resources and optical spectrum in consideration of operation cost. We formulate the problem as mixed integer linear programming and then quantitatively evaluate the trade-off relationship between the optimality of reconfiguration and operation cost. We demonstrate that we can achieve sufficient network performance through the adaptive joint optimization while suppressing an increase in operation cost.
在弹性光网络中,提出了一种时变业务需求下IT资源和频谱的自适应联合优化方法,同时避免了运营成本的增加。目前,大量的网络服务都是由业务功能链(SFC)提供的。发放SFC后,建立SFC与用户之间的光路。考虑到剩余的IT资源和用户的位置,sfc被放置在网络中的候选数据中心之一。在这里,sfc的最佳位置可能会因服务需求的变化而变化。为了保持网络性能,我们需要通过迁移sfc和光路重路由来重新配置网络配置。但是,这种重新配置需要额外的操作成本。本文在考虑运营成本的情况下,考虑了信息技术资源和光谱的联合优化问题。将该问题表述为混合整数线性规划,定量地评价了重构最优性与运行成本之间的权衡关系。结果表明,通过自适应联合优化可以在抑制运行成本增加的同时获得足够的网络性能。
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引用次数: 1
On Feature Selection in Short-Term Prediction of Backbone Optical Network Traffic 骨干网流量短期预测中的特征选择研究
Pub Date : 2022-05-16 DOI: 10.23919/ondm54585.2022.9782850
Aleksandra Knapińska, K. Póltorak, Dominika Poreba, Jan Miszczyk, Mateusz Daniluk, K. Walkowiak
The knowledge about future traffic volumes is beneficial for the network operators in many areas. Short-term forecasting of multiple traffic types helps with efficient resource utilization by enabling near real-time adjustment. An important issue is the choice of a suitable prediction model to obtain the most accurate traffic forecasts. A machine learning (ML) algorithm picked for this task can be further tuned by an appropriate feature selection. In this paper, we propose three models containing sets of additional input features to improve the prediction quality of different ML algorithms. We evaluate our models on multiple datasets containing diverse types of network traffic. In extensive numerical experiments, we prove the high prediction quality of ML regression algorithms aided by our proposed additional features. Obtained mean absolute percentage errors (MAPE) are, depending on the predicted traffic type, as little as 1–10%.
对未来流量的了解对许多领域的网络运营商都是有益的。多种流量类型的短期预测通过实现近乎实时的调整,有助于有效地利用资源。一个重要的问题是选择合适的预测模型以获得最准确的交通预测。为该任务选择的机器学习(ML)算法可以通过适当的特征选择进一步调整。在本文中,我们提出了三个包含额外输入特征集的模型,以提高不同ML算法的预测质量。我们在包含不同类型网络流量的多个数据集上评估我们的模型。在大量的数值实验中,我们证明了在我们提出的附加特征的帮助下ML回归算法的高预测质量。根据预测的流量类型,获得的平均绝对百分比误差(MAPE)低至1-10%。
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引用次数: 6
期刊
2022 International Conference on Optical Network Design and Modeling (ONDM)
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