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分析和研究PTN在城域传输网建设与应用中的技术特点与网络使用状况,根据城域传输网自身规模与特点采用合理、科学的组网运行模式,是实现城域传输网全业务运行的主要途径。本文主要对基于PTN技术的城域传输网PTN独立组网模式、PTN+OTN联合组网的运用进行了分析。 相似文献
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随着IP和数据业务的发展,在大城市出现了大容量、多业务传输要求,这在一定程度上刺激了城域传输网的发展。针对联通城域传输网发展的实际情况,华为曹悦先生《联通城域传输网特点与华为多业务传输平台》一文讨论了SDH、ATM等技术解决多业务传输问题的优缺点,提出了目前应该采用多业务传输平台作为城域传输网的解决方案。介绍了华为公司针对城域传输网骨干传输层、汇接传输层、接入层的METRO系列产品。这对于正在大规模建设城域传输网的运营商具有一定的借鉴意义。 相似文献
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网络和数据业务的高速发展,使建设城域传输网成为运营商争取末端用户、抢占经营机会的焦点。城域传输网的规划应充分考虑到业务需求、技术成熟性、网络开放性。混合传输网由于其多业务兼容性好、组网能力强、扩容能力强等明显优势,成为建设城域传输网的良好思路,SBS加METRO系列为实现这一思路提供了有效的解决方案。 相似文献
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城域传输网的概念和特点 总被引:2,自引:0,他引:2
网络和数据业务的高速发展,使建设城域传输网成为支营商争取末端用户、抢占经营机会点的焦点。介绍了城域传输网的规划应充分考虑到业务需求、技术成熟性、网络开放性的原则,并指出混合传输网由于其多业务兼容性好、组网能力强、扩容能力强等明显优势,成为建设城域传输网的良好思路,SBS METRO系列为实现这一思路提供了有有效的解决方案。 相似文献
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城域波分技术及其应用策略研究 总被引:1,自引:0,他引:1
城域波分系统利用波分复用原理,提高传输网带宽,提供光层保护,是城域核心层的首选技术。本文主要研究城域波分技术的特点和优势,结合城域网现状和问题研究,提出城域波分系统在城域网中建设的思路,为广东电信下一步城域核心网建设提供参考。 相似文献
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城域传输网技术发展策略 总被引:4,自引:0,他引:4
1城域传输网的发展方向当前,随着数据业务的高速发展和城市信息化的推进,网络建设的重点已转向城域网。除了承载传统的电信业务之外,城域传输网还应能提供IP业务的传输,并能针对不同用户的实际需求,提供差别化服务。根据技术发展趋势和市场需求,构建一个大容量、多业务、可扩展和开放式的高可靠性城域传输统一平台,将成为城域传输网发展的方向和演进的最终目标,其实现将有利于开辟新的业务领域、建立新的运营和盈利模式。飞速发展的数据业务具有种类多、动态性、突发性和非对称性强等特点。原先的城域传输网络以承载话音为主要目的,既无法… 相似文献
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城域传输网已经成为能够为各大运营商开展多种业务,带来利润收益的一个平台,本重点介绍了城域传输网中兴起的多种业务,并对利用新一代MSTP开展这些业务的方式做了探讨。通信网络业务的日趋高速发展,为各运营商兴建数据和传统业务并重的城域传输网提供了历史性的契机。可以说,城域传输网将成为各运营商抢占机会点的主战场,也是制造商进行产品整合、提供整体解决方案的试金石。只要整体规划实施成功,就会形成运营商、制造商、用户的多赢局面。 相似文献
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国内传统运营商的城域传输网络以承载话音业务为主,而一些新兴运营商的城域网络则以承载数据业务为主。综合考虑设备的成本、技术的成熟程度.需要承载的业务和可靠性等因素,目前国内各运营商城域传输网络的建设仍以SDH设备为主,运营商在网络节点之间铺设光缆,在每个节点安装SDH设备负责传输语音业务,同时在富裕的带宽上为快速增长的数据业务提供传输通道。 相似文献
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The issues of scalability and class of service have been among the most important research focuses in design of the control plane for wavelength-routed WDM networks. We introduce a framework for achieving a scalable design in metropolitan area networks with WDM as the core technology (called optical metropolitan networks). The framework is summarized with the topics of survivability, scalability and class of service. A novel design concept, called interarrival planning, which aims to achieve scalable control and management in optical metropolitan networks, is addressed 相似文献
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《IEE Review》1992,38(3):91-95
Data networks are fast outgrowing the limitations of existing local area networks standards, creating the demand for an efficient means of connecting data networks over the public telecommunications network. Here, the author shows how, by extending the technology of the local area network from the private to the public domain, metropolitan area networks (MANs) are transforming the capabilities of geographically dispersed computer systems 相似文献
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This paper examines the system design considerations of metropolitan area networks utilizing cable television networks for the delivery of a variety of services to residential customers. Specifically, this paper focuses on the technology, marketplace, and regulatory aspects of this new and expanding market. 相似文献
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B. Goldstein J. Jaffe J. Low H. Meleis 《International Journal of Communication Systems》1988,1(3):121-127
The evolution of optical transmission media and laser technology has made bandwidth an abundant commodity rather than a scarce one. This factor has been clearly recognized by the communications community. As a result metropolitan area networks have been described by some as an extension of local area networks, with the major distinction being that MANs cover a larger distance than LANs. There are several limitations to the approach of simply extending LAN technology to the MAN environment. In this paper a new perspective on MAN architecture is provided that differs from the evolving LAN architecture. 相似文献
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《Optical Fiber Technology》2000,6(3):213-229
Wavelength division multiplexing (WDM) has become a key technology in optical long-haul communications and wide area networks. Recently, interest in introducing WDM into metropolitan networks has increased. We look at some issues pertinent to the design of WDM transmission systems deploying optical add/drop multiplexers in these networks. In particular, we investigate the interaction of node-induced crosstalk with fiber nonlinearities in metropolitan ring networks. Two transmission systems are considered; namely a system of nonzero dispersion shifted fiber operating in the anomalous dispersion regime and another one of single mode fiber with post dispersion compensation. Data rate is assumed to be 10 Gb/s per wavelength. The dependence of the crosstalk/nonlinearity interaction and its system penalty on the frequency difference between signal and crosstalk carriers, input signal power, extinction ratio, number of nodes, and physical span of the network is examined in detail. It is shown that node-induced crosstalk can interact with fiber nonlinearities and introduce limitations on transmission performance. This interaction should therefore be taken into consideration in designing regional metropolitan networks. 相似文献
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目前VPN技术在运营商和企业网络中应用逐渐成为主流.随着VPN技术的日益成熟,MPLS VPN在运营商城域网中的应用日益广泛.本文通过MPLS VPN技术原理的基础来阐述业务模型,并以六安移动建设的电子政务专网业务重点介绍企业组网的需求并给出使用MPLS VPN技术构建企业专网的组网方案,对MPLS VPN业务在运营商... 相似文献
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弹性分组环(RPR)技术定义了一种新型的MAC层协议,采用了共享介质传输和空间复用协议以及低于50ms的故障恢复保护的弹性机制,支持业务的分级(Service Level Agreement),即插即用,基于MAC的高速交换,可承载具有突发性的IP业务,同时支持传统的语音传送等特性,是未来城域网技术的重要发展方向。光纤技术的飞速梵展使得RPR不再仅仅局限于城域网,还可以用于广域网。本文在基于弹性分组环的低于50ms的故障恢复保护的基础上,提出了具有高生存性的解决方案。 相似文献
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透明的光网络将使光波长不经过中继在整个环内传送,更远的传送距离和更高的传送比特将给城域网设备带来新的挑战。正确选择光纤对于确保系统性能和经济性则显得至关重要。分析表明,低于70km,采用E—SMF是最经济的;超过200km,则正色散系数NZ-DSF是最恰当的选择。 相似文献