分析智能光網(wǎng)絡(luò)技術(shù)的性能及使用特點(diǎn)

1、分析智能光網(wǎng)絡(luò)技術(shù)的性能及使用特點(diǎn)我國(guó)智能化電網(wǎng)建設(shè)的加速對(duì)電力通信系統(tǒng)實(shí)時(shí)控制的要求更高，電力通信工作越來(lái)越重要?，F(xiàn)有SDH光傳輸網(wǎng)絡(luò)難以滿(mǎn)足電網(wǎng)發(fā)展的需求，以 SDH以及光傳送網(wǎng)為 基礎(chǔ)的智能光網(wǎng)絡(luò)的成為電力通信系統(tǒng)發(fā)展的方向。Accelerate the intelligent power grid construction in China on the real-time control of power system communication requirements are higher, more and more important in communication pow

2、er. The existing SDH optical transmission network is difficult to meet the power demand of development, with SDH and optical transport network based intelligent optical network has become the development direction of electric power communication system.一、我國(guó)電力光纖通信的現(xiàn)狀Current, our country electric powe

3、r optical fiber communication目前我國(guó)電力光纜主要由普通光纜、ADSS光纜以及OPGW光纜組成，近幾年的光纜建設(shè)以O(shè)PGW光纜為首要選擇，輔以普通光纜，基本覆蓋110kV的開(kāi)閉所以及變電站，通過(guò)光纖線路實(shí)現(xiàn)網(wǎng)絡(luò)連接。就傳輸網(wǎng)絡(luò)而言， 已有的SDH電力通信系統(tǒng)通常采用環(huán)網(wǎng)結(jié)構(gòu)，即使用SDH光端機(jī)進(jìn)行組網(wǎng)，傳輸容量一般為2488Mb/s或者622Mb/s。目前我國(guó)電力通信系統(tǒng)光線通信主要存在以下 幾個(gè)方面的問(wèn)題。首先是靈活性比較差。 通信網(wǎng)的業(yè)務(wù)調(diào) 度能力較差，靜態(tài)的端到端業(yè)務(wù)配置效率低.業(yè)務(wù)的疏通以及匯聚時(shí)往往出現(xiàn)阻塞， 對(duì)于突發(fā)特較強(qiáng)的數(shù)據(jù)業(yè)務(wù)先 天不足，并且SDH

4、的網(wǎng)管功能使得其對(duì)網(wǎng)管的依賴(lài)性較 強(qiáng)，一旦網(wǎng)管出現(xiàn)故障后果不堪設(shè)想。其次是業(yè)務(wù)模式比較單調(diào)。由于SDH網(wǎng)絡(luò)無(wú)法對(duì)不同的用戶(hù)和業(yè)務(wù)進(jìn)行分 級(jí)，因此提供的保護(hù)方式單一，網(wǎng)絡(luò)資源的利用率比較 低.更無(wú)法實(shí)現(xiàn)對(duì)資源的優(yōu)化配置。再次是光纜的安全性 比較差。SDH網(wǎng)絡(luò)只能依靠2個(gè)光纜路由組成環(huán)形網(wǎng)絡(luò)， 難以應(yīng)對(duì)網(wǎng)絡(luò)光纜中斷的故障，有著多站點(diǎn)通信失靈的危險(xiǎn)。最后是擴(kuò)展性能差。由于傳統(tǒng)電力光纖通信的管理針 對(duì)廠商，環(huán)網(wǎng)數(shù)量的增加帶來(lái)了資源瓶頸，電路調(diào)度以及環(huán)間資源的優(yōu)化往往比較繁瑣。At present our country electric power cable mainly by the common

5、 cable, ADSS cable, 0PGW cable, optical cable construction in recent years as the first choice to OPGW cable, with the common cable, opening and closing the basic coverage of 110kV and substation, line through the optical fiber network connection. communication system has been usually used in the ri

6、ng network structure, which is used in SDH optical network, the transmission capacity is generally 2488Mb/s or 622Mb/s. At present our country electric power communication system, fiber optic communications, mainly has following several aspects.Transmissionnetwork,SDHelectricpowerThe first is the fl

7、exibility is poor. Communication network traffic scheduling ability is poor, the static end to end service configuration efficiency low. Our dredging and converging often blocked, for the burst characteristics of strong data business be congenitallydeficient,andSDH networkmanagement functionsothatth

8、estrongdependenceon the network, oncethenettube failure consequences be unbearabletocontemplate. The second is the business model is quite monotonous.Because the SDH network can not beclassified to differentusers and business, so theprotection mode provides a single use of cyber source, the rate is

9、relatively low. But can not achieve the optimal allocation of resources. Again is the safety cable is poor.SDH network can only rely on the 2 cable routing to form a ring network, the fault is difficult to cope with thenetwork interruption, has a more dangerous site communication failure. Finally is

10、 the extensionof poorperformance. Because the traditional electric power optical fiber communication management according to the manufacturer, the increase in the number of ring network brings the bottleneck of resources, scheduling and optimization of circuitring resources oftencomplicated.二、智能光網(wǎng)絡(luò)概

11、述Two, an overview of intelligent optical network(一)智能光網(wǎng)絡(luò)的概念(a ) the concept of intelligent optical network智能光網(wǎng)絡(luò)是在 SDH以及光傳送網(wǎng)上增加獨(dú)立的控 制平面后形成的，支持目前傳送網(wǎng)提供的不同速率以及信 號(hào)特性的業(yè)務(wù)。智能光網(wǎng)絡(luò)能夠在兩個(gè)客戶(hù)網(wǎng)之間提供固 定帶寬的傳輸通道，因此它對(duì)于新業(yè)務(wù)有著較強(qiáng)的可擴(kuò)展 性，能夠支持多種業(yè)務(wù)模型。與傳統(tǒng)的SDH網(wǎng)絡(luò)相比而言，智能光網(wǎng)絡(luò)有著以下幾個(gè)方面的優(yōu)點(diǎn)。首先是采用動(dòng)態(tài)分布式的重路由，將全網(wǎng)的空閑鏈路當(dāng)做備份路由， 可 以為多重節(jié)點(diǎn)故障時(shí)恢復(fù)鏈路提

12、供更多的解決方案， 因此 能夠使用備用寬帶保障重要業(yè)務(wù)，并且它提供多種業(yè)務(wù) 等，能夠根據(jù)不同的需求定制特定的恢復(fù)方式，提高網(wǎng)絡(luò)資源的利用率，為用戶(hù)提供差異化的服務(wù)。其次是智能化的端到端配置。智能光網(wǎng)絡(luò)中的業(yè)務(wù)配置能夠根據(jù)網(wǎng)絡(luò)資 源、用戶(hù)要求等使信令協(xié)議自動(dòng)地進(jìn)端到端的指配， 創(chuàng)建 動(dòng)態(tài)的交叉連接并以此連接做為實(shí)體進(jìn)行管理。 醬油快速 配置的能力可以現(xiàn)狀提高新業(yè)務(wù)的效率，實(shí)現(xiàn)資源的充分利用，并且信令的快速配置有利于未來(lái)多廠商互聯(lián)互通。 最后是資源的動(dòng)態(tài)分配。在智能光網(wǎng)絡(luò)中能夠根據(jù)用戶(hù)的需求提供帶寬，達(dá)到按需分配的目的。通過(guò)設(shè)置自動(dòng)觸發(fā)帶寬調(diào)整條件可以利用智能光網(wǎng)絡(luò)的自動(dòng)化以及智能化 能力來(lái)完成帶

13、寬的自動(dòng)無(wú)損調(diào)整。Intelligent optical network control plane is increased formation of independent in SDH and the optical transmission network after, to support the current transport network to provide different speed and signal characteristics of the business. Intelligent optical networks can provide transmi

14、ssion channel with fixed bandwidth between two customer network, so it is for the new business has a strong scalability, can support many kinds of services model. Compared with the traditional SDH network, intelligent optical network has the following advantages. First is the rerouting the dynamic d

15、istributed, idle link network as backup routing,the solution can be provided more recovery link formultiple node failures, so it can use the sparevariety ofservices, canaccordingtodiffere ntrequirementsof specific recovery mode,improve theutilization ofnetwork rateof resources,toprovidedifferentiate

16、dservice for users. The secondis theintelligentend-to-endconfiguration.Servicebandwidth guarantee important business, and it offers aconfiguration of intelligent optical network according touser requirements for cyber source, the signalingprotocol automatically into the end-to-end assignment,cross c

17、onnection to create dynamic and this connectionas the entity management. The ability offastconfiguration can improve the efficiency ofnewbusiness situation, to achieve full utilizationofresources, rapid deployment and signaling is conduciveto future multivendor interoperability. Finally isthedynamic

18、 allocation of resources. Able to providebandwidth according to the needs of users in intelligentoptical network, to achieve the purpose of distributionaccording to need. Through the automaticnondestructive adjustment settings automatically triggerbandwidth adjustment conditions can make use of inte

19、lligent optical network automation and intelligent ability to complete bandwidth.(二)智能光網(wǎng)絡(luò)的關(guān)鍵技術(shù)(two ) the key technology of intelligent optical network第一，路由技術(shù)。路由技術(shù)是智能光網(wǎng)絡(luò)中控制平面 的重要技術(shù)，分為域內(nèi)路由協(xié)議以及域間路由協(xié)議，前者適用于同一運(yùn)營(yíng)商的不同控制域，后者則適用于是不同運(yùn)營(yíng)商的控制域之間。第二，信令技術(shù)。在SDH中主要依靠網(wǎng)管集中實(shí)現(xiàn)調(diào)度，信令技術(shù)并不重要，而在智能光網(wǎng)絡(luò)中信令技術(shù)是其重點(diǎn)，信令協(xié)議用于建立、維護(hù)以及拆除

20、分布式連接，傳送資源發(fā)現(xiàn)、呼叫控制、泰安鍋爐連接 選擇以及連接控制等信息。第三，自動(dòng)發(fā)現(xiàn)技術(shù)。自動(dòng)發(fā)現(xiàn)指的是網(wǎng)絡(luò)通過(guò)信令協(xié)議實(shí)現(xiàn)網(wǎng)絡(luò)資源的自動(dòng)識(shí)別，包含控制實(shí)體、層鄰接以及物理媒介層的邏輯鄰接和業(yè)務(wù)發(fā) 現(xiàn)。第四，鏈路管理技術(shù)。鏈路管理運(yùn)行于鄰接節(jié)點(diǎn)間的傳輸面上，用于提供鏈路并管理節(jié)點(diǎn)之間的控制信道，其核心作用在于信道管理、故障定位以及隔離等等，是實(shí)現(xiàn) 光路自動(dòng)配置的關(guān)鍵。第五，生存技術(shù)。 生存技術(shù)是保證 網(wǎng)絡(luò)在故障發(fā)生后對(duì)受損業(yè)務(wù)的恢復(fù)， 在智能光網(wǎng)絡(luò)中其 生存技術(shù)基于 GMPLS協(xié)議的，該協(xié)議分為路徑保護(hù)與區(qū) 段保護(hù)，路徑保護(hù)在連接終端上，當(dāng)故障發(fā)生后替換到替代的路徑上，區(qū)段保護(hù)則位于兩個(gè)個(gè)

21、相鄰的結(jié)點(diǎn)之間，在故障發(fā)生后工作鏈路轉(zhuǎn)移到備用的鏈路。First, the routing technology. Routing technology is an important technology of control plane of intelligent optical network, divided into intra-domain routing protocol and routing protocol between domains, different control domain the former is applicable to the same oper

22、ators, the latter is suitable to different operators between control domain. Second, signaling technology. In the SDH network to realize scheduling mainly rely on, signaling technology is not important, but in the intelligent optical network signaling technology is the key, signaling protocol for th

23、e establishment, maintenance and removal of distributed connection, transmission resource discovery, call control, connection and connection control information. Third, automatic discovery technology. Automatic discovery refers to the automatic identification of network implementation of cyber source through the signaling protocols, including control entity, adjacent to the layer and physical media layer and business logic adjacency discovery. Fourth, link management technology. Lin