共查询到20条相似文献,搜索用时 187 毫秒
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专线业务的高速发展驱动光传送网从运营商的基础网络发展为直接面向客户的高品质专线业务承载网。随着MSTP的退出,OTN成为实现光业务网的主要技术。分析研究了OTN承载专线业务的关键技术及演进,研究OTN多域级联保护中存在的问题并推动在ITU-T进行标准修订,研究并解决域间采用高速接口互连时异厂商设备间的互通问题。提出了运营商通过SDN与OTN相结合建设高品质政企专网的发展方向,推动在IETF制定基于ACTN的SD-OTN控制器北向接口标准和YANG数据模型,在中国通信标准化协会制定接入型光传送网(OTN)的设备管控技术要求,实现南向接口标准化和OTN网络的开放解耦。分享了中国联通在业界开发并部署首个基于SDN智能管控的OTN政企精品网的成果。 相似文献
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采用多LLID技术的EPON综合接入系统 总被引:2,自引:0,他引:2
采用远端光网络单元(ONU)设备和多逻辑链路标识(LLID)的技术,将以太网无源光网络(EPON)系统的多业务管理和远端设备管理融入新的框架,并通过将服务等级协议(SLA)与链路相联系,将业务在链路上分流,使得系统的带宽保证和严格的时延抖动控制成为可能,从而克服了以太网传送体制只能“尽力转发”的不足,较好地解决了多种业务综合接入能力的问题。 相似文献
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光传送网是指光信道接入点所定界的传送网络。光传送网络的物理层采用光纤作为传输媒介,光传送网为客户层信号在很大范围内提供包括传送、复用、路由、管理、抗故障等功能。光传输技术经历了PDH、SDH到WDM的发展过程。在90年代,SONET/SDH网络在容量、可靠性和网络传送效率方面都得到迅速提高。光传送网主要提供如下功能:不同网络客户的透明传送、不同管理域的互联、光信道连接和保护、性能监测和告警监视、网络管理。目前光网络的单信道的传送速率(图1)和网络的传送容量在迅速增加,以满足不断增长的互联网的业务需求。单纤复用的… 相似文献
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自动化、智能化是电信网络转型升级的重要方向,作为基础承载网的传送网络,其管控系统的智能化水平尚不能满足业务发展和网络转型的要求。以自智网络的发展背景为切入点,首先介绍传送网管控系统智能化的技术特征和能力分级;然后基于自智网络的目标架构,分析传送网管控系统智能化演进架构和关键技术;最后从业务编排、故障诊断、网络优化等环节研究传送网智能管控的应用场景。 相似文献
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自动交换光网络网管系统的设计与分析 总被引:3,自引:0,他引:3
自动交换光网络(ASON)在光传输网络之上引入控制平面,可以支持动态波长连接的建立,动态地分配网络资源,因此一出现就引起了广泛的关注。ITU-T等组织定义了大量关于控制信令方面的规范,但是没有给出任何与网络管理方面相关的内容。本文针对ASON网络的特点,提出了适合ASON网络的基于CORBA技术实现的域间网络管理方案,然后对ASON的基本管理功能需求进行了分析,其中着重分析了ASON引入的控制平面的管理需求,为控制平面管理功能的实现做出了理论指导。最后,对如何应用CORBA技术实现网管系统进行了分析。 相似文献
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Miki T. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1993,81(11):1594-1609
The key technologies required for the development of optical transport networks, namely, optical fiber transmission and digital transport, which includes transmission signal multiplexing, transport nodes, and network operation functions, are highlighted. The trends in transport technology, the impact of synchronous digital hierarchy (SDH) and asynchronous transfer mode (ATM), the role of telecommunications management networks, and network integrity enhancement techniques are elucidated. It is demonstrated that these technologies have brought about a great change in transport network design and performance. Further innovations are required to fully realize a high-performance computer communication network, a cost-effective nationwide B-ISDN, and local networks for video distribution. These include the realization of an optical access transport network and the extension of trunk network capabilities which will be possible with optical path layer technologies 相似文献
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随着人工智能技术和网络日趋紧密地融合,未来网络的运营和生产应该是全面数字化、自动化和智能化的。目前跨专业网络故障定位主要依赖各专业运维人员分别进行分析和派单,导致排障时间长、重复派单等问题。为了节省人力工作,借助自动化和人工智能技术,研发了一套应用于实际现网的跨专业网络智能运维系统。该系统可对IPRAN和OTN关联的拓扑信息以及实时的IPRAN和OTN告警数据进行综合分析,精准定位根因告警,确定故障位置,实现自动派单。该系统构建了跨专业的故障自动诊断能力,将故障定位时间由传统的2 min缩短为几十毫秒,极大减少故障处理时间和人工工作,可覆盖现网大部分故障种类。 相似文献
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Protection cycles in mesh WDM networks 总被引:4,自引:0,他引:4
Ellinas G. Hailemariam A.G. Stern T.E. 《Selected Areas in Communications, IEEE Journal on》2000,18(10):1924-1937
A fault recovery system that is fast and reliable is essential to today's networks, as it can be used to minimize the impact of the fault on the operation of the network and the services it provides. This paper proposes a methodology for performing automatic protection switching (APS) in optical networks with arbitrary mesh topologies in order to protect the network from fiber link failures. All fiber links interconnecting the optical switches are assumed to be bidirectional. In the scenario considered, the layout of the protection fibers and the setup of the protection switches is implemented in nonreal time, during the setup of the network. When a fiber link fails, the connections that use that link are automatically restored and their signals are routed to their original destination using the protection fibers and protection switches. The protection process proposed is fast, distributed, and autonomous. It restores the network in real time, without relying on a central manager or a centralized database. It is also independent of the topology and the connection state of the network at the time of the failure. 相似文献
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The authors contend that optical system developments, which so far have followed a straightforward and logical path from direct link replacement to the proposed transwitching networks, will evolve towards passive (fiber-only) networks that could ultimately see the eradication of the central office. To explain this view of the future, they briefly trace optical system developments to the present day before citing the technology developments that have led them to the conclusion. They discuss present network and technology trends, focusing on the reduction of the amount of electronic hardware, the disappearance of bandwidth efficiency as an important factor, and the state of the optical network today. They then turn to the future network and technology, showing how the central office can be dispensed with by operating the network on a radio mode, with each terminal assigned a specific frequency 相似文献
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A key feature of Carrier Ethernet networks is its operation and management framework. The link state, in this context, is
simply determined by the detection (or absence for a given period) of continuity check message (CCM) at the receiver end of
a management end point. However, cross-layer information can be inexpensively gained by looking into the loss patterns of
these CCM frames, especially when Carrier Ethernet is operating directly over wavelengths (Layer-1) from transparent optical
links or networks. This paper experimentally demonstrates a case for optical signal-to-noise and optical signal-to-interference
estimation from monitoring standard CCM frame loss frame rate. Moreover, the loss pattern signatures of such physical-layer
impairments may give in-depth link state information for fault and performance management as it may give valuable clues about
the dominant impairing phenomena. 相似文献