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1、 HEBEI UNITED UNIVERSITY 畢業(yè)設計翻譯 （漢譯英） 學生姓名： 專業(yè)班級：07通信1班 學 院：信息工程學院 指導教師： 2008年06月08日 河北聯(lián)合大學信息工程學院 原 文 多業(yè)務傳送平臺（MSTP）是對傳統(tǒng)的SDH設備進行了改進，在SDH幀格式中提供不同顆粒的多種業(yè)務、多種協(xié)議的接入、匯聚和傳輸能力，是目前城域傳送網最主要的實現(xiàn)方式之一。 基于SDH 的MSTP 比較適合于已大量敷設SDH 網絡的電信運營商，可以靈活有效地支持迅速發(fā)展的分組數(shù)據(jù)業(yè)務，同時可以保證對多

2、業(yè)務的統(tǒng)一網絡管理，實現(xiàn)從電路交換網向分組交換網的平滑過渡。在近期中國移動以話音等TDM 業(yè)務為主、數(shù)據(jù)業(yè)務為輔的情況下，選擇以SDH為基礎的MSTP建設方案是穩(wěn)妥且可持續(xù)發(fā)展的策略?；赟DH的MSTP將是今后幾年城域光傳送網建設的重點。綜合來說，基于SDH 的MSTP具有以下技術特點。 我們在使用MSTP技術組網應用前，一定要先對它有一個清楚的技術定位，這樣才能做到很好地利用它，并在應用中體現(xiàn)出它的優(yōu)點。MSTP技術是適應城域綜合傳送網建設要求，從SDH設備發(fā)展起來的新興綜合傳送技術，其基本特征是通過對以太數(shù)據(jù)幀和ATM信元的封裝，實現(xiàn)基于SDH的多業(yè)務綜合傳送。從本質上講，MSTP技術

3、定位在城域傳送網的范疇之內，主要目的是為了實現(xiàn)多業(yè)務的綜合傳送，其完善的二層交換等數(shù)據(jù)鏈路層功能也僅僅是為了提高數(shù)據(jù)業(yè)務的傳送效率。但是，隨著與其它網絡技術的不斷融合發(fā)展，如RPR、MPLS等技術，MSTP技術的應用領域和組網思路不斷地革新，其設備逐漸跨越了原有的城域傳送網和業(yè)務網之間的界限，反映了業(yè)務網與傳送網在城域范圍內融合的發(fā)展趨勢，主要表現(xiàn)在以下兩個方面： 1．以MSTP為主體的傳送網本身逐步通過網元出租等方式逐步向業(yè)務網轉變，例如虛擬傳送網等等。 2．MSTP技術表現(xiàn)出逐步替代其它數(shù)據(jù)業(yè)務網絡的發(fā)展趨勢，也就是部分數(shù)據(jù)鏈路層功能的替代，如替代ATM網絡實現(xiàn)DSLAM的接入；當然也

4、有少數(shù)廠商的MSTP傳送設備實現(xiàn)了部分第三層功能。但是在實際網絡部署中，需要重點考慮如何圍繞MSTP技術開展業(yè)務，以及考慮利用MSTP技術能夠替代哪些現(xiàn)有數(shù)據(jù)業(yè)務網絡的功能。 MSTP網絡的業(yè)務類型 支持EPL（Ethernet Private Line，以太網專線）業(yè)務、EVPL（Ethernet Virtual Private Line，以太網虛擬專線）業(yè)務、EPLAN（Ethernet Private Local Area Network，以太網專用局域網）業(yè)務和EVPLAN（Ethernet Virtual Private LAN，以太網虛擬專用局域網）業(yè)務本設計是根據(jù)客戶的需求，

5、進行規(guī)劃設計，運用華為光智能光傳輸設備OptiX OSN 3500及OptiX T2000傳送網子網級綜合網管系統(tǒng)完成EPL、EVPL業(yè)務配置，最終設計達到滿足客戶需求。 本設計過程之工程需求： 在某城的A、B、C、D四地之間需要組建新的通信網絡。 1.用戶A有兩個分部位于NE1和NE3，要進行以太網通信，需要10Mbit/s帶寬。 2.用戶B有兩個分部位于NE1和NE3，要進行以太網通信，需要20Mbit/s帶寬。 3.用戶A和用戶B的業(yè)務需要相互隔離的。 4.用戶A與用戶B的以太網設備提供100Mbit/s以太網接口，工作模式為自協(xié)商，均不支持VLAN。 5.用戶D兩個

6、分部分別位于NE1和NE2，需要互相通信。 6.用戶E兩個分部分別位于NE1和NE2，需要互相通信。 7.用戶D和用戶E的業(yè)務需要相互隔離，但業(yè)務量在時間上有互補性，可共享20Mbit/s帶寬。 8.用戶D和用戶E的以太網設備提供100Mbit/s以太網電接口，工作模式為自協(xié)商，均不支持VLAN標簽。 工程規(guī)劃： 由4個OptiX OSN 3500網元組成STM-16的二纖雙向復用段保護環(huán)帶STM-4的無保護鏈。NE1、NE2、NE3、NE4為環(huán)上的4個網元，其中NE1為網關網元。 使用以太網透傳單板或以太網交換單板都可以實現(xiàn)A、B、C、D間EPL業(yè)務。在T2000上設置網元

7、的以太網接入功能。本設計使用以太網交換單板實現(xiàn)A、B、C、D間EPL業(yè)務配置。 使用共享VCTRUNK的EVPL（VLAN）實現(xiàn)A、B、C、D間的EVPL業(yè)務。 MSTP不是一個成型的封閉標準體系，它是依托于SDH平臺的技術及應用，具體采用什么技術取決于運營商建網的思路以及為最終用戶提供何種類型的業(yè)務。MSTP體系中有大量的數(shù)據(jù)標準的引用，比如以太網標準，在此層面上的建議和協(xié)議層出不窮。究竟將如何將何種技術納入MSTP平臺，必然需要不斷的摸索和嘗試。MSTP技術的出現(xiàn)和應用代表了一種新的網絡變革，不僅是技術上的，也是管理上的，更是觀念上的。它為城域網中的綜合業(yè)務提供了解決方案，是現(xiàn)有數(shù)據(jù)網

8、絡的補充，為傳統(tǒng)SDH注入了新的活力。 MSTP 這一多業(yè)務傳送平臺正得到愈來愈多通信運營商的青睞，其傳輸層功能正從傳輸語音向傳輸寬帶數(shù)據(jù)轉換，并且由于采用了新一代的SDH 技術(GFP、VCAT、LCAS)、集合數(shù)據(jù)二層交換和ATM交換提供高效、靈活的和可靠的數(shù)據(jù)傳輸。MSTP 對城域網進行整合，將分離的、重疊的網絡整合成一個多業(yè)務、靈活的、易管理的低成本網絡。隨著RPR、MPLS 等新技術的成型, 以及相關新技術的開發(fā)。MSTP 在城域網的構建中會越來越重要。城域網的最大特點是多樣性，每種技術都有其應用空間，我們不能簡單地以一種方式來決定各個地區(qū)城域網的發(fā)展，應根據(jù)城市規(guī)模、業(yè)務類型、用

9、戶分布等選取合理的技術，并充分考慮如何兼顧更好利用已有網絡資源和向未來演進之間的關系，為運營商創(chuàng)造最大的投資回報。相信隨著技術和標準的逐步完善和發(fā)展，MSTP技術和設備會迎來更加美好的明天。 譯 文 Multi-Service Transport Platform (MSTP) has improved the traditional SDH equipment ,And formatted in a variety of services in the SDH frame provided by different particles, multi-protocol access, ag

10、gregation and transmission capacity, It is one of the most important metro transport network way. The MSTP based on SDH has a lot more laid for SDH network carriers the flexibility to effectively support the rapid development of packet data services, while ensuring a unified multi-service network m

11、anagement, from a circuit-switched networks to packet switched networks smooth transition. China Mobile in the near future to voice and other TDM-based services, data services, supplemented by the case, select the SDH-based MSTP-building program is a sound and sustainable development strategies. SDH

12、-based MSTP will be the next few years, the construction of metro optical transport network key. In summary, the SDH-based MSTP has the following technical characteristics. 1. It has large cross-connect capacity to support VC-4/VC-3/VC-12 various levels of cross-connect and continuous cascade or vi

13、rtual concatenation processing. 2. It Provide a rich multi-service (PDH / SDH, ATM, Ethernet / IP, image services, etc.) interface, you can add or replace the interface module, flexible to adapt to changes in business development. 3. Ethernet and ATM services with transparent transmission or floor

14、 of the exchange capacity of the transmission link bandwidth can be configured, and support VLAN, flow control, operations and port aggregation or statistical multiplexing function. 4. Complete with a variety of protection mechanisms (SDH, ATM, Ethernet / IP) networking features and flexible. 5. I

15、t can achieve a unified, intelligent network management, has good compatibility and interoperability. Before we use the MSTP technology networking applications, it must first have a clear technical position, so as to achieve good use of it and reflect it in the application of benefits. MSTP technol

16、ogy is integrated metro transport network to adapt to requirements of the building, from the SDH equipment developed new integrated transmission technology, its basic features are data frames by Ethernet and ATM cell encapsulation, SDH-based multi-service integrated delivery. In essence, MSTP techno

17、logy to locate in metro areas within the transport network, the main purpose is to achieve a comprehensive multi-service delivery, its perfect Layer 2 switching features such as data link layer only to improve the delivery of data services efficiency. However, as with other network technology conver

18、gence, such as RPR, MPLS and other technologies, MSTP technology applications and networking ideas innovation constantly, gradually their equipment across the metro transport network and existing business networks between boundaries, reflecting the business network and transmission network in the me

19、tropolitan area integration trends, mainly in the following two aspects: 1. The MSTP as the mainstay of the transport network itself gradually through the leased line, etc. and gradually shift to the service network, such as virtual transmission network and so on. 2. MSTP technology to show the gr

20、adual replacement of other data services network development trend, which is part of the data link layer functions instead as an alternative to achieve the DSLAM, ATM network access; course, there are few manufacturers of MSTP transmission equipment to achieve some Layer 3 functionality . But in the

21、 actual network deployment, it is important to consider how to conduct business around the MSTP technology, and consider the use of MSTP technology which can replace the existing data service networks. The types of MSTP network business：Support EPL (Ethernet Private Line, Ethernet Private Line) ser

22、vice, EVPL (Ethernet Virtual Private Line, Ethernet Virtual Private Line) services, EPLAN (Ethernet Private Local Area Network, Ethernet Private LAN) service and EVPLAN (Ethernet Virtual Private LAN, Ethernet virtual Private LAN) service。The key technologies MSTP: MSTP of GFP, MSTP of virtual concat

23、enation, MSTP of LCAS, MSTP of the RPR and MPLS. The design first EPL, EVPL, EPLAN, EVPLAN comparison service and business needs according to the user, using Huaweis optical network equipment, Huaweis optical network OptiX OSN and the sub-network management system, the customer needs T2000 EPL, EVP

24、L service design. Design requirements include application engineering, project planning, system configuration. Demonstrate the significance of the engineering design services for the bandwidth requirements of current data is an effective solution. In a city of A, B, C, D is needed between four to f

25、orm a new communications network. 1 user A has two branches located in NE1 and NE3, to make Ethernet communication, the need 10Mbit / s bandwidth. 2 User B has two divisions located in NE1 and NE3, to conduct an Ethernet communication needs 20Mbit / s bandwidth. 3 User A and User B, isolated from

26、 each others business needs. 4 User A and User Bs Ethernet devices 100Mbit / s Ethernet interface, auto-negotiation mode, do not support VLAN. 5 User D and two divisions are located in NE1 NE2, need to communicate with each other. 6 user E and two divisions are located in NE1 NE2, need to communi

27、cate with each other. 7. User D User E business needs and isolated from each other, but in time the volume of business are complementary, shared 20Mbit / s bandwidth. 8 users D and E, Ethernet equipment users 100Mbit / s electrical Ethernet interfaces, auto-negotiation mode, do not support VLAN ta

28、gs. Project planning OptiX OSN 3500 by the four STM-16 network element composition of the two-fiber bidirectional multiplex section protection ring with STM-4 unprotected chain. NE1, NE2, NE3, NE4 of the four ring network element, which is the gateway network element NE1. Using the Ethernet or Et

29、hernet switch board through board flyers can achieve A, B, C, D between the EPL business. Set on the T2000 Ethernet access network element functions. This design uses Ethernet switching SBC A, B, C, D between the EPL service configuration. Shared VCTRUNK the EVPL (VLAN) to achieve A, B, C, D betwee

30、n the EVPL MSTP is not a standard system for closed molding, it is relying on SDH technology and application platform, specifically the use of any technology depends on the idea of building a network operator as well as end-user what type of business. The MSTP system in a large number of standard

31、 reference data, such as the Ethernet standard, at this level after another on the recommendations and agreements. How exactly what technology will be incorporated into MSTP platform, the inevitable need to constantly explore and try. MSTP technology and the emergence and application of new network

32、represents a change not only the technical but also management, it is conceptual. MAN It provides comprehensive business solutions that complement existing data networks, the traditional SDH has injected new vitality. Multi-Service Transport Platform MSTP is that more and more telecom operators to

33、get the favor of their transport layer functions are transferred from voice to broadband data conversion, and thanks to a new generation of SDH technology (GFP, VCAT, LCAS), collection of data exchange and ATM switching layer to provide efficient, flexible and reliable data transmission. MSTP integr

34、ation of MAN, will separate, overlapping into a multi-service network integration, flexible, easy to manage low-cost network. With RPR, MPLS and other new technology, shape, and the associated development of new technologies. MSTP in the metropolitan area will become increasingly important in the bu

35、ilding. MANs biggest feature is the diversity of each technology has its own application space, we can not be simply a way to determine the various regions of metropolitan development should be based on city size, type of business, users select a reasonable distribution technology, and fully conside

36、r how to balance better use of existing network resources and the future evolution of the relationship between the operator to create the greatest return on investment. I believe that with the gradual improvement of technology and standards and development, MSTP technology and equipment will usher in a brighter tomorrow.