以太网测试仪应用介绍

1、TX130M+ Mobile backhaulRev. 1.0Next Generation Networks (NGN) are migrating to a packet-based network Increasing service revenue Lowering network costs Delivering Quality of Service (QoS)Mobile operators/service providers worldwide are faced with major challenges TDM transport continues to represent

2、 significant revenue for carriers TDM must be supported in this new modelService providers are moving from voice services to networked services and solutions 传统移动回程Next Generation Networks (NGN) are migrating to a packet-based network Increasing service revenue Lowering network costs Delivering Qual

3、ity of Service (QoS)Mobile operators/service providers worldwide are faced with major challenges TDM transport continues to represent significant revenue for carriers TDM must be supported in this new modelService providers are moving from voice services to networked services and solutions 市场动态Next

4、Generation Networks (NGN) are migrating to a packet-based network Increasing service revenue Lowering network costs Delivering Quality of Service (QoS)Mobile operators/service providers worldwide are faced with major challenges TDM transport continues to represent significant revenue for carriers TD

5、M must be supported in this new modelService providers are moving from voice services to networked services and solutions 当前和未来的移动回程Next Generation Networks (NGN) are migrating to a packet-based network Increasing service revenue Lowering network costs Delivering Quality of Service (QoS)Mobile opera

6、tors/service providers worldwide are faced with major challenges TDM transport continues to represent significant revenue for carriers TDM must be supported in this new modelService providers are moving from voice services to networked services and solutions 同步以太网用于移动回程 Cellular base station Synchro

7、nization allows smooth call hand-off between base stations, minimizes dropped calls, and reduces customer churn Legacy services: E1, fax, modem Increases bandwidth utilization Improves QoSThere are applications that still require synchronization in a Packet Switched NetworkSynchronization is essenti

8、al for wireless and wired carriers to move to NGN技术汇聚n通常来说，连接BTS (Node B)和BSC(RNC)之间的网络称为移动回程From where to where is it?Backhaul demarcationnPrimary physical media widely used and available for mobile backhaul are;nCopper: nE1/T1 lines leased or deployed by operators directlynMicrowave:nMicrowave lin

9、ks are costly to deploy and maintainnFiber: nContinues to be the most common media to haul ethernet to cell sites. SDH or MSTP is also widely deployed for mobile backhaul.nEthernet over fiber can be supported using;nPoint to point networksnRing topologiesnPassive Optical Networks (PON)nEPON flexible

10、 cost effective way to tap into existing fiber plant. Bandwidth can be scaled by reducing the number of splits and/or using 10G EPON in future nGPON similar to GPON but not as interoperable as EPON with OLT/ONTs nPassive WDM cost effective way to add new services on existing fiber without impacting

11、current service. Passive devices are low cost and provide flexible deployment optionsTransport media choicesCell site backhaulnMoving from TDM to Ethernet-based transport involves risks;nTDM-circuits are embedded and offer high reliability, Voice QoS, and accurate timingnEthernet technology requires

12、 careful attention to match these TDM capabilitiesA Leap of FaithTDM versus EthernetCurrent and FutureMobile NetworksBackhaul MigrationMobile ArchitecturenRecommendation published in May 2006nDefines timing and synchronization elements of packet networksnSpecifies the minimum equipment tolerance to

13、jitter and wander at the boundary of the packet networks at TDM interfacesnOutlines the minimum requirements for the synchronization function of network elementsnSynchronous Ethernet clocking distribution can be considered an extension of the current synchronization distribution networknIt does not

14、impact any existing IEEE 802.3 specifications, such as frequency tolerance, but refers to the new additional network element clock functionalitynUses the Protocol Data Units (OAMPDU) to pass Synchronization Status Message (SSM)ITU-T Recommendation G.8261nUses the PHY clocknGenerates the clock signal

15、 from “bit stream”nSimilar to traditional SONET/SDH/PDH PLLsnEach node in the Packet Network recovers the clocknPerformance is independent of network loadingSynchronous Ethernet ConceptStratum 1TraceablereferencePacket NetworkL2-L7 (Packet)DataTiming FlowData FlowDPLL Recovered ClockDataDPLLL2-L7 (P

16、acket)DPLLL2-L7 (Packet)Architecture for Synchronous EthernetITU-T G.8261 LSRLSRLSROptical network / PacketIWFCustomerEquipment /networkMulti Service AccessABCLSRLSRLSROptical network / PacketIWFCustomerEquipment /networkMulti Service AccessABCG.8261 Reference Clock Location EdgeCoreAccessnPacket ba

17、sed synchronization mechanismnUDP/IP layers messaging (multicast and unicast) over EthernetnNTP, Adaptive Clock RecoverynFrequency, Phase and TimenTDM synch/SyncE are Layer 1 mechanisms that support frequency onlynClient/server modelnMaster clock, slave clock (ordinary clock)nIntermediary nodes may

18、or may not support IEEE1588 PTP (unlike SyncE)nOn-pass-support mechanismsnBoundary clocknTransparent clockIEEE1588v2Precise Timing Protocol (PTP) Accurate time-of-day distribution is required for precise SLA monitoring and TDD radio applications nApplications like billing and SLA (service level agre

19、ements) can benefit from a network that is aware of the time of the daynSome networks are very noisy and there is a need to have carrier class synchronizationnIn these conditions Synchronous Ethernet can be used to deliver frequency and IEEE-1588 can be used to deliver time of the dayPros and ConsIE

20、EE-1588 vs G.8261G.8261 Synchronous EthernetIEEE-1588v2以太网物理层独立于物理层只能传输频率不能传输按天的时间能传输频率和时间不受配对的上级设备影响受配对的其他网络设备的影响Example of IEEE-1588v2 and同步以太网核心数据核心数据网网Ethernet基站基站CES IWF核心网接入网Ethernet基站基站CES IWF边缘网PRS同步以太网同步以太网 1588 主时钟主时钟 Recovered from the synchronous Ethernet1588 从时钟从时钟1588 从时钟从时钟nEthernet O

21、AM 关键指标 n通过验证连接性和验证配置缺陷来检测以太网服务n测试以太网服务性能并提供环回测试n参考并包含下列标准nIEEE 802.3ah: 连接OAMnIEEE 802.1ag: 连接缺陷管理nITU-T Y.1731: 性能监测PurposeEthernet OAMMEPMIPMobile Operator MALink MALink MACarrier Ethernet NetworkRAN BSRAN NCnIEEE 802.3ahn远端缺陷探测n环回控制n本地连接失败和失败情况 (with Event OAMPDUs)nIEEE 802.1agn探测, 验证,和隔离连接错误n连接

22、性错误管理MIBn消息支持: 连接性检查, 连接追踪, 环回, 和错误指示nITU-T Y.1731n提供类似 IEEE 802.1ag的功能，并增加下列几种功能 Frame Lossn时延n时延验证 APS自动保护倒换Ethernet OAMn每层独立支持OAM性能nOAMs 设备之间互相会话n各成员之间互相报告Confidential & Proprietary Information of VeEX Inc. 20Standards OverviewEthernet OAME2E 性能监测性能监测 E2E 缺陷监测缺陷监测 P2P 连接缺陷管理连接缺陷管理New Ethernet

23、 ApplicationsPresentation Name HereConfidential & Proprietary Information of VeEX Inc.21TX130M+ ApplicationsPDH 支持PDH网络（2M）的点到点误码测试测试速率: E1 (2M), E3 (34M), T1 (1.5M), T3 (45M)接口: 双接收端口, 单发送口接口类型: BNC, RJ45 (E1-balanced) or Bantam (T1)内部时钟精度 : 内置 3.5ppm oscillator with clock shift (+/- 50ppm)接收时钟

24、 (RX-1 clock) 外接时钟 (RX-2 clock : 1.544 or 2.048 Mbps/Hz测试功能 :BERT, 电平, 频率脉冲模版, 抖动, E1 漂移VF, ISDN-PRIE1: V.54 loopback/ T1: CSU/NIU loopbackPresentation Name HereConfidential & Proprietary Information of VeEX Inc.22TX130M+ ApplicationsEthernet 以太网测试功能部分测试速率: 10/100/1000-T, 100-FX, 1000-X接口: RJ45

25、(10/100/1000-T), SFP (100-FX, 1000-X)发送时钟频率 : Internal 3.5ppm oscillatorExternal (RX-2 clock : 1.544 or 2.048 Mbps/Hz)测试功能 :BERT, 吞吐量, RFC2544 环回IP 特性IP Ping, Trace Route, ARP, 网页浏览VoIPIPTVPresentation Name HereConfidential & Proprietary Information of VeEX Inc.23TX130M+ ApplicationsSyncE emulat

26、ion 模拟同步主时钟单元或从时钟单元测试速率: 10/100/1000-T, 100-FX, 1000-X接口: RJ45 (10/100/1000-T), SFP (100-FX, 1000-X)主时钟设备模拟外部时钟输入: RJ45: 1.544, 2.048Mbps/MHzBNC: 1.544, 2.048Mbps/MHz, 125MHz, 25MHz参考时钟源: Internal 3.5ppm oscillator with offset (+/- 50ppm)External参考时钟输出:Connector: TX-1, BNCClock rate: 1.544, 2.048Mbp

27、s/MHz, 125MHz, 25MHz从时钟设备从以太网接口输入的时钟精度参考时钟输出:Connector: TX-1, BNCClock rate: 1.544, 2.048Mbps/MHz, 125MHz, 25MHz漂移测量 (需求2.048Mbps/Hz 参考时钟)Presentation Name HereConfidential & Proprietary Information of VeEX Inc.24TX130M+ ApplicationsIEEE1588v2/PTP emulation 模拟 IEEE1588v2/PTP 主时钟或从时钟设备测试速率: 10/10

28、0/1000-T, 100-FX, 1000-X接口: RJ45 (10/100/1000-T), SFP (100-FX, 1000-X)协议监测和显示测试内容: PDV, RTD, IPG主时钟设备外部时钟输入: RJ45: 1.544, 2.048Mbps/MHzBNC: 1.544, 2.048Mbps/MHz, 125MHz, 25MHz参考时钟源: 内部 3.5ppm oscillator with offset (+/- 50ppm)外部参考时钟输出:Connector: TX-1, BNCClock rate: 1.544, 2.048Mbps/MHz, 125MHz, 25M

29、Hz从时钟设备来至以太网接口的时钟参考时钟输出:接口: TX-1, BNC时钟速率: 1.544, 2.048Mbps/MHz, 125MHz, 25MHzExample of IEEE-1588v2 and同步以太网核心数据核心数据网网Ethernet基站基站CES IWF核心网接入网Ethernet基站基站CES IWF边缘网PRS同步以太网同步以太网 1588 主时钟主时钟 Recovered from the synchronous Ethernet1588 从时钟从时钟1588 从时钟从时钟Presentation Name HereConfidential & Propri

30、etary Information of VeEX Inc.26TX130M+ ApplicationsMix Mode 验证同步PDH/以太网TX130M+s PDH和以太网的传输时钟同步于一下时钟源 :同步以太网主时钟模式: 外部, 内部从时钟模式: 来至于以太网接口IEEE1588v2/PTP主时钟模式: 外部, 内部从时钟模式:来至于以太网接口没有SyncE/IEEE1588v2/PTP的模式 外部, 内部 or RX-1 (PDH loop clock)PDH extracted clock PLL for Ethernet interfacenIEEE 802.3ahn远端缺陷探测n环回控制n本地连接失败和失败情况 (with Event OAMPDUs)nIEEE 802.1agn探测, 验证,和隔离连接错误n连接性错