华为PTN规划指导

PTN网络规划指导,Page2,内容提纲,概述网络层次规划网络设备和具体单板选取规划网元ID，组网接口的IP地址和DCN通道设备级保护设计规划标签交换路径/LSP规划OAM和业务级别的保护实现方案业务流规划设置QoS策略规划时钟网管的规划和业务安全,Page3,移动宽带对承载网络的带宽挑战已经来临,对于3G业务来讲，数据业务占用了大部份的带宽，但是带来的附加值却不高引入分组技术的关键需求：提高分组弹性通道的带宽利用率、以及降低每bit的成本,Page4,移动业务和网络正在向ALLIP转型,ALLIPevolutioninmobile,3GPP/3GPP2/IEEEAdvanceofALLIP:Lowcost,HighBandwidth,FlexibilityandScalability,Presence,MSC,GSN,HLR,CSCF,O实现端到端OAM和保护。PTN对E1业务的PWE3协议处理（TDM，ATM，MLPPP）软件灵活可配置；TDM:可实现64kbps空闲时隙的压缩；ATM/IMA:VPI/VCI交换和空闲ATM信元去除；,BSC,RNC,采用PWE3技术实现对传统业务的承载,Page36,WhyPWE3,专线仿真，为运营商提供高回报的网络业务专线的服务质量、安全性广为用户接受，每比特回报高;PSN支持任意长度的网络流，具有执行优化的网络流量工程的能力，并对网络业务流具有分类、执行流量管理控制和按QoS优先等级的保障机制;通用标签，提供统一的多业务网络数据传送平台，减少运营费用PWE3可使多业务汇聚到统一的PSN；在PSN上提供统一适配，仿真FR、Ethernet、ATM、TDM等传统的L1和L2层专线业务;运营商希望不同业务均能以统一的方式会聚，减少网络数量、配置维护的复杂度和链路上的费用。保护投资，提供网络业务的前后向兼容性PSN需要使用PW与现有巨大的非IP/MPLS网络设备后向地兼容;可灵活支持新业务，是L2/L3层间业务会聚的基础单元;,FE/GE/10GESTM-NOTNWDM,TDME1,ATME1,ML-PPPE1,Tunnel,PW10,PW14,PW15,Page37,SmartE1解决方案极大降低用户投资,ChSTM-1Card,Tunnel,CESChSTM-1,IMAChSTM-1,ML-PPPChSTM-1,E1,TDM,Abis,E1,lubUP,AAL2,ATM,IMA,2GTDME1,2GTDME1,3GIMAE1,3GIMAE1,E1ElectricInterfaceCard,E1,TDM,ChSTM-1,Abis,E1,lubUP,AAL2,ATM,IMA,ChSTM-1,2GTDME1,3GIMAE1,E1,HDLC,PPP/ML-PPP,MPLS,PWE3,CESE1,IMAE1,ML-PPPE1,ChSTM-1,HDLC,PPP/ML-PPP,MPLS,PWE3,通道化的STM-1支持CES/IMA/ML-PPP多种协议灵活可配灵活的E1业务，支持CES/IMA/ML-PPP多种协议灵活可配单块单板支持多各种协议业务，根据端口灵活可配,网络的演进更加平滑、更加容易，保护既有投资,2GTDME1,3GIMAE1,Page38,完善的ATM业务处理能力,IMAE1,IP/MPLS,RNC,RNC,IMAE1,ATMTC,ATMOAM,ATMPWE3,IMAE1,PSN,Policing：符合rfc2514与TM41标准拥塞控制：精细的控制，提供全局/业务类型/连接丢弃策略AAL5丢弃/WRED/尾丢弃perCLP连接调度：基于连接的ShVC/WRR调度Shaping：符合TM41标准,ATMPSN方向：支持基于连接的Policing、ATM交换、OAM处理PSNATM方向：支持基于连接的Policing、ATM交换、OAM处理、拥塞控制、连接调度、Shaping功能支持对空闲ATM信元的压缩,符合I.610与I.732标准,内嵌虚拟ATM交换机，降低网络投资，简化网络层次,Page39,PlanningServices,Someprinciples:Analyzetheservicerequirements.Whichkindsofserviceistransported?Thefollowinghardwarefactorsshouldbeconsidered:Validslotsforserviceboards.Mappingrelationbetweeninterfaceboardsandprocessingboards.Variousprotectionschemes.Determinetheinterfacetypesforservices.Theavailableresourcescoverthecross-connectcapacityWhenplanningnewservicesfortheexistingnetwork,checkwhetherthenewservicesarecompatiblewiththeexistingservicesandwhetherthenewservicescanbeextended.Considerthecapabilityofthenetworkandequipmentinthenetworkofsupportingfutureservices.,Page40,PlanningServices,PlanningEthernetServicesEline,ELAN,EaggrFE,GE,10GEPlanningATMEmulationServicesandIMAServicesE1orCSTM-1VCI/VPITrafficpolicy:CBR,RT-VBR,NRT_VBR,UBRPlanningtheCESServiceCESoPSNorSAToPOnlytheCESoPSNmodesupportstimeslotcompression.Choosewhethertosuppresstimeslotsaccordingtoservicerequirements.TwoclocksynchronizationschemesfortheCESservice,thatis,PEsynchronizationschemeandself-adaptivesynchronizationscheme.CESsetsproperpacketbufferingtimeandjittervariationtimeaccordingtotheservicerequirements.Therecommendedpacketbufferingtimeis1msandtherecommendedjittervariationtimeis5ms.Currently,thePTNequipmentsupportsonlythepoint-to-pointCESservice.,Page41,PlanningServices,Example:ATMService:,Page42,内容提纲,概述网络层次规划网络设备和具体单板选取规划网元ID，组网接口的IP地址和DCN通道设备级保护设计规划标签交换路径/LSP规划OAM和业务级别的保护实现方案业务流规划设置QoS策略规划时钟网管的规划和业务安全,Page43,QOS理念的演进,层次化的刚性管道演变为层次化的弹性管道，PTN如何保证每一级弹性管道的QOS特性？端到端的QOS设计理念分组传送管道UNI侧的层次化H-QOS保证分组传送管道NNI侧的DS-TEQoS保证,Page44,端到端QoS设计,user1,用户侧：通过层次化H-QoS控制小管道网络侧：大管道基于规划控制DS-TE，类似SDHVC的刚性管道消耗更少的资源（如队列），更低的成本以及简化操作,user2,usern,Internet,VoIP,Video,Mobile,user3,Page45,UNI侧通过HQoS提供更精细的差异化业务质量,不同的业务有不同的CIR不同的业务有不同的优先级用户共享大管道带宽汇聚后的管道可以再次调度多级调度，多颗粒调度，根据优先级调度,非层次化QoS层次化QoS,VS,Page46,PlanningQoS,ThegeneralprinciplesforplanningtheQoS:InthecaseoftheV-UNIinterface,usetheCARtolimittheaccessedservicetraffic.InthecaseofthePTNequipmentusedasanedgenodeintheDSdomain,performthemappingofPHBasfollows:Inthecaseoftheservicetrafficthatcomesfromanon-DSdomain,applythecomplexflowclassificationattheV-UNIinterfacetoperformthePHBmapping.InthecaseoftheservicetrafficthatcomesfromaDSdomain,applythesimpleflowclassificationattheV-UNIinterfacetoperformthePHBmapping.AtthetransitnodeintheDSdomain,theservicetrafficisforwardedaccordingtoPHB.Inaddition,theQoSissimplyconfiguredfortheservicetraffic.Theflowclassifying(simple)rulesforallnodesinaDSdomainshouldbethesame.ApplytheWREDpolicy(default)ratherthanthetaildroppolicytocontrolcongestionforV-UNI,PW,QinQ,andCQ.WhensimpleflowclassificationisperformedontheserviceaccessedfromV-UNI,setthemappedprioritynothigherthanEFforforwardingtheservicetraffic.CS7andCS6arereservedfortheinternalprotocolpackets(dynamicservicesignaling,forexample)oftheequipmentandnetworkcontrolpackets(DCN,forexample).,Page47,PlanningQoS,ThegeneralprinciplesforplanningtheQoS:Whenplanningthebandwidthofanentireport,reserve10%ofthebandwidthresourcefortheprotocolpacketsoftheequipment.Inthisway,thenetworkcontrolplaneandmanagementplanecanworkwithhighefficiency.Theuserservicetraffic(servicetrafficoftheEFforwardingpriority,forexample)ofhighprioritiescarriedinonePWshouldnotexceed25%ofalltheservicetrafficcarriedinthePW.Inthisway,theservicetrafficoflowprioritiesmaypassthrough.Specifybandwidthforthetunnel,thatis,TE-Tunnel.ThetotalbandwidthoftheTE-Tunnelscarriedonthesameportshouldnotexceedthemaximumbandwidthofthephysicalport.ThebandwidthconfigurationamongV-UNImembersintheV-UNIgroupshouldmeetthefollowingrequirements:ThetotalCIRofalltheV-UNImembersshouldnotexceedtheCIRoftheV-UNIgroup.ThetotalPIRofalltheV-UNImembersshouldnotexceedthePIRoftheV-UNIgroup.ThebandwidthconfigurationamongPWmemberscarriedinoneTE-Tunnelshouldmeetthefollowingrequirements:ThetotalCIRofallPWsshouldnotexceedtherateoftheTE-Tunnel.ThePIRofanyPWshouldnotexceedtherateoftheTE-Tunnel.WhenaCESserviceisaccessed,theequipmentprovidestheEFQoSfortheCESservice.,Page48,内容提纲,概述网络层次规划网络设备和具体单板选取规划网元ID，组网接口的IP地址和DCN通道设备级保护设计规划标签交换路径/LSP规划OAM和业务级别的保护实现方案业务流规划设置QoS策略规划时钟网管的规划和业务安全,Page49,PlanningClocks,Someprinciplesonclockplanning:Inthecaseofanetworkonthebackbonelayerorconvergencelayer,configureprotectionfortheclockandsettheprimaryandsecondaryreferenceclocksourcesforprotectionswitchingoftheclock.Inthecaseofanetworkontheaccesslayer,setonereferenceclocksourceatthecentralstation.Inthisway,otherstationstracetheclockofthecentralstation.Thecentralnodeoranodeofhighreliabilityprovidestheclocksource.Ifthereisabuildingintegratedtimingsupplysystem(BITS)orotherexternalclockequipmentofhighprecision,theexternaltimingmodeisrecommendedfortheNE;ifnot,thelinetimingisrecommendedfortheNE.Theinternaltimingshouldbetakenasthelowestlevelofclocktracing.Properlyplantheclocksynchronizationnetworktoavoidclockinter-lockandclockfaults.Ifthesyn