节点文献
光传送网和分组传送网的网络规划设计
The Design for the Network Planning of OTN and PTN
【作者】 姚兰；
【导师】 宋清洋；
【作者基本信息】 东北大学 ， 电子与通信工程， 2011， 硕士
【摘要】 随着网络IP化从核心层到接入层不断延伸,全网IP化是电信网络未来发展的必然趋势。作为各种业务的基础承载网络,传送网一直广泛存在。业内对业务承载的IP化趋势已达成共识,未来面向全业务运营的光传输网络将主要负责IP/以太网流量的传送,为分组的流量特征而优化,向着智能、融合、宽带、高效、可靠的分组传送技术方向发展。目前SDH(同步数字体系)(MSTP(多业务传送平台))和WDM(密集波分复用)是通信运营商传送网使用的主要技术,但其都存在着一定的局限性。如IP业务的快速增长是SDH无法满足的；采用点对点方式的WDM技术,缺乏有效的网络维护管理手段。光传送网正向光传送网(OTN)和分组传送网(PTN)相结合的趋势发展,其受到业界人士的广泛关注。PTN技术适应了软交换和3G等业务网络IP化的趋势,可以用来承载3G基站的回传业务,提供VPN业务和L2的以太网专线等；同时使用大容量OTN交叉设备则可以提高骨干传送网的可靠性,实现大颗粒波长通道业务的快速开通和调度,优化网络结构。本文的主要内容和创新点归纳如下：1、全面细致地介绍了OTN与PTN在通信技术中各自的优越性以及未来发展,特别是通过与目前在运营商传送网中大量使用的技术(例如MSTP、SD、WDM等)进行比较,显示出OTN与PTN在未来传送网中的地位。PTN定位于城域传输网的接入汇聚层,提供IP化基站、大颗粒集团客户专线等多业务综合承载；OTN定位于城域传输网的核心层,提供大颗粒IP业务的超大带宽、超长距离传输。2、业务的IP化将直接影响传送网的演进策略和技术发展,这可以从不同层面来分析：核心层和汇聚、接入层。在目前运营商网络结构基础上提出将OTN与PTN融合,可以根据实际情况采用混合、独立、联合组网模式。网络优化融合是一个循序渐进的过程,提出网络逐步(初期、中期、远期)融合的模式。3、对目前某运营商传送网络现状及其在全网IP化形势下存在的问题进行了分析。针对其今后业务发展和需求提出将目前最适合全网IP化的OTN与PTN技术引入,为现有网络提出了改造方案。
【Abstract】 With IP-based network evolution of IP-based network access layer from the core layer to extend, IP is the future development trend of telecommunication networks. Transmission network has been widespread network as the basis is the foundation of various business bearer network. Hosted IP-based business trend in the industry consensus, the future for all business operations of the optical transport network is mainly responsible for IP/Ethernet traffic transmission, the packet flow characteristics of the optimized towards intelligent, integrated, broadband, high, reliable packet delivery technology direction.Current telecommunication operators transmission network mainly using technology is SDH (Synchronous Digital Hierarchy)(MSTP(Multi-Service Transfer Platform)) and WDM(Dense Wavelength Division Multiplexing), but there are some limitations. Such as SDH cannot satisfy IP fast growing business, WDM using point-to-point application modes and lack of effective network maintenance management.OTN(OpticalTransportNetwork) and PTN (PacketTransportNetwork) as the optical transport network in the field of technological development trends are the industry’s attention. Large-capacity OTN cross-device applications can improve the reliability of the backbone transmission network, realization of large particle wavelength channel fast opening and scheduling business and optimize IP network. The PTN is adapted to the3G technology and business networks such as IP softswitch tendency can be used to carry3G base stations return business, to provide line and Ethernet L2VPN services, etc. The main content of this paper and innovative points summarized as follows:1.With OTN and PTN conducted thorough and careful introduction, this paper introduces otns and PTN in communications of their respective advantages and development history and use. Especially through and present in teleportation network operator is used in great quantities in technology (such as MSTP, SDH, etc.) were compared with PTN showed otns in the future the status of transmission network. PTN positioning in the metro transmission network access convergence layer, provides IP of base stations, big particle group clients such as comprehensive carrying more business line. Otns positioning in the core of metro, provides large transmission network of business of granular IP large bandwidth and long distance transmission.2. IP change will directly influence the transmission network, the evolution of strategy and technology development. This can be analyzed from two aspects:the backbone of the transport layer and metro transport layer. In the current operator network structure is proposed based on PTN fusion, will otns and may, according to actual circumstances, can use combination, independence, joint network modes. Network optimization fusion is a gradual process and puts forward network gradually (initial, middle and long term) fusion model.3. For the current status and a teleportation network operators in hyper IP change situation analysis of existing problems, and for its future business development and demand will be current the most suitable hyper IP mineralization otns and PTN technology into the retrofit scheme for existing network.