Research On Networking Scheme Of Metropolitan Area Network Of X City Based On 100G OTN Technology

In recent years,with the rapid development of broadband,mobile Internet and other data services,the network traffic has shown an explosive growth trend,which has put forward higher requirements for transmission network bandwidth requirements.Therefore,at present,the problem of network expansion of the metropolitan area network(MAN)is urgently resolved.The traditional urban area network mainly uses the synchronization digital hierarchy(SDH)and wave division multiplexing(WDM).However,SDH and WDM only support the transmission of small particles.The high-capacity high-speed rate can not be met,and the networking method is relatively single.It only supports point-to-point transmission.To make up for the shortcomings of traditional technology,an optical transmission network(OTN)with a rate of 100 Gbit/s has emerged in recent years.100 G OTN technology,which combines the advantages of WDM and SDH,reduces the limitations of physical factors such as non-linear effect,optical signal-to-noise ratio,and has more flexible networking mode.It is suitable for the application of metropolitan area network with complex network structure.At present,the structure of X City MAN is more complex,mainly composed of SDH-based multi-service transport platform(MSTP),packet transport network(PTN),optical transport network(OTN)and gigabit passive optical network(GPON).MSTP network mainly carries the second generation(2G)services and a small amount of data services,PTN mainly carries 2G and 3G services,while the OTN of the current network mainly carries small-grained services,and the highest rate is only 10Gbit/s,which can not meet the transmission requirements of large capacity and high speed,so it is imminent to use 100 G technology to build a network.In this thesis,the status quo of the metropolitan area transmission network of X city is analyzed.Combined with the development of the 100 G OTN technology and its main application scene,starting from the principle and key rechnologies of 100 G OTN technology,the design criterion of the MAN of X city is formulated based on 100 G OTN.Combined with the construction project of the city area network of X city,the scheme of networking design based on 100 G OTN technology has been mainly proposed.The application of reconfigurable optical add-drop multiplexer(ROADM)technology in networking scheme is studied.The network topology,equipment and cable selection,performance parameter design,network management system planning and protection mode design are analyzed.According to the current situation of the X city network,the planning of network capacity is analyzed.Compared with 100 G OTN equipment on the market,suitable equipment is selected for networking based on the actual situation of X city.The station configuration and network design of OTN sites are given.The compensation scheme for the line performance parameters such as OSNR,dispersion,nonlinear effect,etc.,and the design of the protection scheme eventually formed the X-city metropolitan network load-bearing scheme are given based on 100 G OTN technology,and the system acceptance methods and standards are proposed.Also,the scheme of networking test of X city based on 100 G OTN technology has been put forward in this thesis.The acceptance methods and standards are given,which mainly involve the main optical channel test,the system signal-to-noise ratio(SNR)test,the system error rate test,the system transmission performance test and the system protection switching test.The test results show that the design scheme proposed in this paper is reasonable and effective.It meets the test targets and can be put into production and application to ensure the stable operation of the system,and solves the current large flow and large particle service transmission and scheduling requirements.Therefore,the proposed 100 G OTN networking design and test schemes can also be used as a transitional scheme for future all-optical networks.