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2015 International Conference on Optical Network Design and Modeling (ONDM)最新文献

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Innovative tracking system for next generation FSO systems under massive earthquakes 大地震下下一代无线光通信系统的创新跟踪系统
Pub Date : 2015-06-25 DOI: 10.1109/ONDM.2015.7127304
M. Matsumoto, K. Osawa, Sho Hotta, K. Wakamori
FSO (Free Space Optical) communication system is a wireless communication system using a transmission link with the optical beam in free space, and it is expected to provide the communication between buildings, and areas where the placement of optical fiber is difficult. Furthermore, it is applied to the line in a large temporary disaster are expected to FSO. In addition, FSO can be applied as a fiber backup when the disaster occurred. However, since the light beam has high directivity in free space link, the shock and vibration due to environmental changes, will lead to large misalignment between the transmitting and receiving antennas. Therefore, their impact on the stability of the FSO communication system should be investigated. In this paper, we describe the results of the basic measurement data obtained at the Great East Japan Earthquake that occurred in March 2011. We investigate the impact of the earthquake on the tracking system technology for FSO that we have developed. Furthermore, we show the effectiveness of the proposed error correction for reducing the impact of earthquakes on the communication link.
自由空间光通信系统(FSO)是一种利用自由空间的光束传输链路的无线通信系统,它有望提供建筑物之间和难以放置光纤的区域之间的通信。此外,它还适用于线路在发生大型临时灾害时的预期FSO。此外,FSO还可以作为灾难发生时的光纤备份。然而,由于光束在自由空间链路中具有很高的指向性,由于环境的变化而产生的冲击和振动,会导致发射天线和接收天线之间产生较大的不对准。因此,应该研究它们对FSO通信系统稳定性的影响。本文描述了2011年3月东日本大地震基本测量数据的结果。研究了地震对我们开发的无线光通信跟踪系统技术的影响。此外,我们还证明了所提出的误差校正对于减少地震对通信链路的影响的有效性。
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引用次数: 6
Away from optimal: performance analysis of multilane ethernet transmission with random path selection in optical networks 远离最优:光网络中随机路径选择的多通道以太网传输性能分析
Pub Date : 2015-05-11 DOI: 10.1109/ONDM.2015.7127284
Anna Engelmann, A. Jukan
In this paper, we pose a question of wether the request on path optimality is necessary in Ethernet-over-optical networks, and set the goal to calculate the upper bounds on differential delay and buffer requirement for Ethernet multilane transmission in a randomly routed optical network. We compare two district cases applicable to forwarding of multi-lane Ethernet traffic: WDM and optical packet switched networks. In case of WDM, which we refer to as RND-MP, any randomly chosen set of wavelength-routed paths among all available paths can be used for parallel transmission. In the optical packet switched network, referred to as RND-OPS, we assume that paths do not need to be reserved in advance, whereby the forwarding can be hop-by-hop, following a randomly chosen free port at every optical packet switch. The analytical and simulation results are promising and show that, in a heavily loaded network, RND-OPS yields excellent results with comparably low buffer requirement. RND-MP performs better for over-provisioned networks. To the best of our knowledge this is the first analysis to addressing the problem of multipath routing in optical networks without optimizations or complex path computation algorithms.
本文提出了在以太网光网络中是否需要路径最优性要求的问题,并设定了在随机路由光网络中计算以太网多通道传输差分时延和缓冲需求的上界的目标。我们比较了两种适用于多通道以太网流量转发的区域案例:WDM和光分组交换网络。在波分复用(WDM)中,我们称之为RND-MP,在所有可用的路径中,任意一组随机选择的波长路由路径都可以用于并行传输。在光分组交换网络(RND-OPS)中,我们假设不需要预先预留路径,因此可以逐跳转发,在每个光分组交换机上随机选择一个空闲端口。分析和仿真结果表明,在高负载网络中,RND-OPS以相对较低的缓冲需求获得了优异的结果。RND-MP在过度供应的网络中表现更好。据我们所知,这是解决光网络中没有优化或复杂路径计算算法的多径路由问题的第一个分析。
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引用次数: 0
A cost efficient line rate assignment strategy for MLR WDM optical networks 多路复用波分复用光网络的低成本线路速率分配策略
Pub Date : 2015-05-11 DOI: 10.1109/ONDM.2015.7127278
Gul Boztok Algin, E. T. Tunali
Recent studies have shown that optical WDM networks with mixed line rate (MLR) support efficiently respond to diverse variety of traffic requirements having different service demands. In MLR WDM optical networks, an intelligent line rate selection strategy can enable cost efficient resource allocations for routing, rate and wavelength assignment problem. In this work, we propose a learning based line rate assignment strategy that reduces communication cost and bandwidth blocking ratio. Performances of three variations of the proposed strategy are compared with maximum and minimum line rate assignment strategies of the literature through simulations. Results show that performance can be improved with the proposed algorithm.
近年来的研究表明,具有混合线速率的光WDM网络能够有效地响应具有不同业务需求的各种业务需求。在多路复用波分复用光网络中,采用智能线路速率选择策略可以有效地解决路由、速率和波长分配问题。在这项工作中,我们提出了一种基于学习的线路速率分配策略,降低了通信成本和带宽阻塞率。通过仿真比较了三种策略的性能与文献中最大和最小线路速率分配策略的性能。实验结果表明,该算法可以提高系统的性能。
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引用次数: 1
Exploring the effects of physical layer parameters in WDM based fixed and flexible-grid networks 探讨了基于WDM的固定网格和柔性网格网络中物理层参数的影响
Pub Date : 2015-05-11 DOI: 10.1109/ONDM.2015.7127286
Arsalan Ahmad, A. Bianco, Hussein Chouman, V. Curri, G. Marchetto, Sarosh Tahir
We focus on the design of the logical layer on an optical infrastructure for three different architectures: fixed grid WDM with fixed-rate multilevel modulation (WDM-FRMF), fixed grid WDM with time-domain hybrid modulation formats (WDM-TDHFM) and flexible grid (FG). A fairly detailed physical layer modeling is considered in the network design algorithms. Simulations are performed on a 20 nodes network with varying traffic loads. Besides comparing the two paradigms of flexible and fixed grid networks, including both pure and hybrid modulation formats, in terms of their spectral efficiency and number of blocked requests, we show the importance of integrating a detailed physical layer modeling in the network design phase. We mostly focus on the investigation of the impact of changing physical layer design parameters such as fiber type and span length on network level performance.
我们重点设计了三种不同架构的光基础设施的逻辑层:固定网格WDM与固定速率多电平调制(WDM- frmf),固定网格WDM与时域混合调制格式(WDM- tdhfm)和灵活网格(FG)。在网络设计算法中考虑了相当详细的物理层建模。在20个节点的网络中进行了不同流量负载的仿真。除了比较灵活和固定网格网络的两种范式,包括纯调制格式和混合调制格式,在频谱效率和阻塞请求数量方面,我们还展示了在网络设计阶段集成详细物理层建模的重要性。我们主要研究改变物理层设计参数(如光纤类型和跨度长度)对网络级性能的影响。
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引用次数: 6
Network-wide signal power control strategies in WDM networks WDM网络中全网信号功率控制策略
Pub Date : 2015-05-11 DOI: 10.1109/ONDM.2015.7127301
Xue Wang, Yue Fei, M. Razo, A. Fumagalli, M. Garrich
Software Defined Networking (SDN) is enabling wavelength-division multiplexed (WDM) networks to be programmable down to individual components. While taking into account typical gain and noise figure profiles of erbium-doped fiber amplifier (EDFA) components, the authors consider a number of signal power control strategies and compare their performance in terms of achievable lightpath optical signal-to-noise ratio (OSNR). These strategies are applied network-wide to concurrently control the gain of each individual amplifier and the signal power equalization at each reconfigurable optical add/drop multiplexer (ROADM). Simulation results show that the lightpath OSNR is affected by three factors: the EDFA gain control strategy, power equalization strategy and wavelength assignment algorithm. A trade-off between lightpath average OSNR and OSNR variance across the WDM channels is also noted.
软件定义网络(SDN)使波分复用(WDM)网络可编程到单个组件。在考虑掺铒光纤放大器(EDFA)组件的典型增益和噪声曲线的同时,作者考虑了一些信号功率控制策略,并根据可实现的光路光信噪比(OSNR)比较了它们的性能。这些策略在全网范围内应用,以同时控制每个放大器的增益和每个可重构光加/丢多路复用器(ROADM)的信号功率均衡。仿真结果表明,影响光路OSNR的因素有三个:EDFA增益控制策略、功率均衡策略和波长分配算法。还注意到光路平均OSNR和WDM信道上OSNR方差之间的权衡。
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引用次数: 9
Resource allocation policies in SDM optical networks (Invited paper) SDM光网络中的资源分配策略(特邀论文)
Pub Date : 2015-05-11 DOI: 10.1109/ONDM.2015.7127293
D. Siracusa, F. Pederzolli, D. Klonidis, V. López, E. Salvadori
The capacity benefits of flexi-grid optical networks are limited by the finite amount of bandwidth of standard fibers, and will not be able to scale indefinitely. Space Division Multiplexing (SDM) has emerged as a promising technology to overcome this limitation. In this preliminary work we give an overview of current SDM technologies, covering coupled and non-coupled SDM networks, and of the possibilities and limitations they bring to the problem of Routing, Space and Spectrum Allocation (RSSA). We focus on the trade-offs between spectral efficiency and amount of transmission devices enabled by SDM technologies, presenting a number of preliminary heuristic policies to solve RSSA, and evaluating them in the context of dynamic traffic by means of simulations. We show that different heuristics can optimize different aspects of RSSA, and that one strikes a reasonable balance.
柔性网格光网络的容量优势受到标准光纤有限带宽的限制,并且不能无限扩展。空分多路复用(SDM)技术已成为克服这一限制的一种有前途的技术。在这项初步工作中,我们概述了当前的SDM技术,包括耦合和非耦合SDM网络,以及它们给路由、空间和频谱分配(RSSA)问题带来的可能性和限制。我们专注于频谱效率和SDM技术支持的传输设备数量之间的权衡,提出了一些初步的启发式策略来解决RSSA,并通过模拟在动态流量背景下对它们进行评估。我们表明,不同的启发式方法可以优化RSSA的不同方面,并且可以达到合理的平衡。
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引用次数: 34
Parameter selection in optical networks with variable-code-rate transceivers 变码速率光网络中的参数选择
Pub Date : 2015-05-11 DOI: 10.1109/ONDM.2015.7127273
D. Mello, Andre L. N. Souza, J. Reis, J. Diniz, L. Carvalho, N. G. González, Juliano R. F. Oliveira, D. Arantes, M. H. M. Costa
Future flexible transceivers will be able to adjust modulation format, symbol rate and FEC scheme according to the channel and network conditions. This paper uses a combination of theoretical derivations and experimental results to recommend the best set of parameters to satisfy a specific demand to be routed along the network. In particular, for a given required OSNR (which is related to reach) and desired net bit rate, and assuming a capacity-achieving FEC scheme, the paper provides the set of modulation format, symbol rate and code rate which requires the minimum bandwidth, while offering an arbitrarily low bit error rate. We observed that optimum operating points required FEC schemes with overheads ranging from almost 0 to 100%, which is an important guideline for future flexible optical communications systems.
未来的柔性收发器将能够根据信道和网络条件调整调制格式、符号速率和FEC方案。本文采用理论推导和实验结果相结合的方法来推荐一组最佳参数,以满足沿网络路由的特定需求。特别地,对于给定所需的OSNR(与到达率有关)和期望的净比特率,并假设一个容量实现FEC方案,本文提供了一组需要最小带宽的调制格式、符号率和码率,同时提供了任意低的误码率。我们观察到最佳工作点需要FEC方案,开销范围从几乎为0到100%,这是未来柔性光通信系统的重要指导方针。
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引用次数: 6
Disaster-aware submarine fiber-optic cable deployment 灾难感知海底光缆部署
Pub Date : 2015-05-11 DOI: 10.1109/ONDM.2015.7127306
D. L. Msongaleli, F. Dikbiyik, M. Zukerman, B. Mukherjee
Network survivability is an important element in telecommunication network design nowadays because of the social and economic reliance on the Internet and the significant cost associated with service interruption. Moreover, the fact that submarine fiber-optic cables are susceptible to man-made or natural disasters, such as earthquakes, is well recognized. A disaster-resilient submarine cable deployment can save cost incurred by network operators such as the capacity loss cost, the cruising cost and the repair cost of the damaged cables, in order to restore network service when a cable break is prompted by a disaster occurrence. In this work, we investigate disaster-aware submarine cable deployment problem. While selecting a path for the cables, our approach aims to minimize the total expected loss cost, considering that submarine fiber-optic cables may break because of natural disasters, subject to deployment budget, path uniqueness, regular protection, elliptic shape, and linearization constraints. In our approach, we assume disaster-unrelated failures are handled by providing a backup cable along with primary cable. We consider a scenario with two nodes located on two different lands separated by a water body (sea/ocean). We then consider an elliptic cable shape to formulate the problem, which can be extended to other cable shapes, subject to avoiding deploying cable in disaster zones. We provide an Integer Linear Programming formulation for the problem. Finally, we present illustrative numerical examples that show the potential benefit of our approach as well as conclusion and future work.
由于当今社会和经济对互联网的依赖以及与服务中断相关的巨大成本,网络的生存性是电信网络设计中的一个重要因素。此外,海底光缆容易受到地震等人为或自然灾害的影响,这一事实是众所周知的。部署灾备型海底光缆可以节省网络运营商的容量损失成本、巡航成本和损坏光缆的修复成本等成本,以便在灾害导致光缆断裂时恢复网络业务。在这项工作中,我们研究了灾害感知的海底电缆部署问题。在选择电缆路径时,考虑到海底光缆可能因自然灾害而断裂,受部署预算、路径唯一性、规则保护、椭圆形状和线性化约束,我们的方法以最小化总预期损耗成本为目标。在我们的方法中,我们假设通过提供备份电缆和主电缆来处理与灾难无关的故障。我们考虑这样一个场景:两个节点位于由水体(海/海洋)分隔的两个不同的陆地上。然后,我们考虑椭圆电缆形状来制定问题,该问题可以扩展到其他电缆形状,前提是避免在灾区部署电缆。我们为这个问题提供了一个整数线性规划公式。最后,我们提出了说明性的数值例子,显示了我们的方法的潜在好处,以及结论和未来的工作。
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引用次数: 11
An improved dynamic wavelength assignment in statistical UDWDM-PONs 统计UDWDM-PONs中改进的动态波长分配方法
Pub Date : 2015-05-11 DOI: 10.1109/ONDM.2015.7127268
V. Sales, J. Segarra, J. Prat
Dynamic wavelength assignment (DWA) is investigated for managing ultra-dense wavelength division multiplexing-passive optical networks (UDWDM-PONs). The optical network units (ONUs) own lasers under limited thermal tunability and their wavelengths have random distribution in a band. ONU and optical line terminal (OLT) architectures with coherent transceivers are proposed, providing a spectral efficiency suitable for a high capacity PON with large number of users and long-reach approach. In activation processes, ONU acceptances up to 99.99% are obtained with a DWA technique. Under standard environmental conditions, the DWA method is combined with guard bands and then ONU blocking probabilities below 0.1% and availability ratios up to 99.99% are achieved.
针对超密集波分多路无源光网络(UDWDM-PONs)的管理问题,研究了动态波长分配(DWA)技术。光网络单元(onu)在有限的热可调性下拥有激光器,其波长在一个波段内具有随机分布。提出了带有相干收发器的ONU和光线路终端(OLT)架构,提供了适合于大容量、大用户和长距离的PON的频谱效率。在活化过程中,采用DWA技术可获得99.99%的ONU接受度。在标准环境条件下,DWA方法与保护带相结合,ONU阻塞概率低于0.1%,可用率高达99.99%。
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引用次数: 5
Interoperator fixed-mobile network sharing 运营商间固定移动网络共享
Pub Date : 2015-05-11 DOI: 10.1109/ONDM.2015.7127297
I. Szczesniak, P. Chołda, A. Pach, B. Wozna
We propose the novel idea of interoperator fixed-mobile network sharing, which can be software-defined and readily-deployed. We study the benefits which the sharing brings in terms of resiliency, and show that, with the appropriate placement of a few active nodes, the mean service downtime can be reduced more than threefold by providing interoperator communication to as little as one optical network unit in one hundred. The implementation of the proposed idea can be carried out in stages when needed (the pay-as-you-grow deployment), and in those parts of the network where high service availability is needed most, e.g., in a business district. While the performance should expectedly increase, we show the resiliency is brought almost out of thin air by using redundant resources of different operators. We evaluated the service availability for 87400 networks with the relative standard error of the sample mean below 1%.
我们提出了一种新的运营商间固定移动网络共享的思想,它可以是软件定义的,并且易于部署。我们研究了共享在弹性方面带来的好处,并表明,通过适当放置一些活动节点,通过向每100个光网络单元提供一个运营商间通信,平均服务停机时间可以减少三倍以上。所提出的想法的实现可以在需要时分阶段进行(按增长付费部署),并在网络中最需要高服务可用性的部分,例如,在商业区。虽然性能应该得到预期的提高,但我们表明,通过使用不同操作符的冗余资源,弹性几乎是无中生有的。我们对87400个网络的服务可用性进行了评估,样本均值的相对标准误差低于1%。
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引用次数: 3
期刊
2015 International Conference on Optical Network Design and Modeling (ONDM)
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