核心网中不同语音编码的传送以及带宽计算(客服系统呼叫中心参考).ppt

VoIPBandwidthCalculationofFEInterface,InformationofG.711,G.729andAMR,G.711：(160+4+26+20+8+12)*8/0.02=92.00kbpsG.729：(20+4+26+20+8+12)*8/0.02=36.00kbpsAMR12.2:(31+4+26+20+8+12)*8/0.02=40.40kbpsIfcombinedwithVADabout50%bandwidthwillbesaved,BandwidthcalculationbasingonFEinterface,TransmissionmodelbasingonFEports,VoIPBandwidthCalculationofPOSInterface,InformationofG.711,G.729andAMR,G.711：(160+4+12+8+20+9)*8/0.02=85.20kbpsG.729：(20+4+12+8+20+9)*8/0.02=29.20kbpsAMR12.2:(31+4+12+8+20+9)*8/0.02=33.60kbpsIfcombinedwithVADabout50%bandwidthwillbesaved,BandwidthcalculationbasingonPOSinterface,TransmissionmodelbasingonPOSports,VOIPSolutionforG/TMSC,TraditionalsolutionforG/TMSC,HuaweiSoftswitchVOIPsolutionforG/TMSC,Eachvoicechanneloccupy64Kbps.,CombinedwithVADandG.711/G.729dynamicconversion,basingonPOSandFEinterface,inaverageonecalloccupies27.0Kbps.,Usingtraditionsolutionitwillneed94,815E1.AccordingtoHuaweiSoftswitchMSC,thetotal40,000E1havebeenused.InChina,therentchargeforoneE1areapproximately2000RMBpermonthforintra-provincetransmission,and15000RMBpermonthforinter-provincetransmission.VOIPsolutioncanhelpCMCCsave:（94,815E140,000E1）*15,000822,225,000RMB（99,422,612USD）permonth,99,422,612USD*12=1,193,071,344USDperyear.,TraditionalSolutionforVMSC,BasicTrafficmodel:,IftheBSCsupport100Kmobilesubscribers,acordingtoerltableitwillneed2526E(82E1),sointraditionalsolutionitwillneed130E1forlongdistancetransmission:PSTN-MSC:2526*30%+2526*30%=1516E(48E1)BSC-MSC:2526E(82E1),BSC,MSC,Smallcity,Largecity,PSTN,BSC,PSTN,TraditionalsolutionforVMSC,30%MSToPSTN30%PSTNToMS40%MS-MS80%Localtermination0.025erl/subs,Averageholdingtime:60sGOS:0.01,LocalCallLocalSwitchingsolutionforVMSC,IftheBSCsupport100Kmobilesubscribers,acordingtoerltableitwillneed2526E(82E1)Insoftswitchlocalcalllocalswitchingsolutionitwillneed7E1forlongdistancetransmission:PSTN-MSC:0BSC-MSC:2526*40%*(1-80%)=203E(7E1)CombinedwithAMR12.2basingonFEinterfaceandVADtechnology,onecalloccupies20.2kbps,itwillonlyneed3E1.PSTN-MSC:0BSC-MSC:203/3=67E(3E1),LCLSSolutionforVMSC,30%MSToPSTN30%PSTNToMS40%MS-MS80%Localtermination0.025erl/subs,Averageholdingtime:60sGOS:0.01,BasicTrafficmodel:,MSCServer,BSC,Smallcity,Largecity,PSTN,BSC,PSTN,MGW,TDM/IP,移动软交换技术专题,移动软交换的演进软交换协议介绍VOIP技术以及编解码技术移动软交换可靠性解决方案QOS和IP网络安全MNP和MVNO解决方案SOSM监听解决方案,支持IP承载语音，包括G.711/G.729/G.723/AMR等多种语音编码方式支持静音检测技术VAD,优点：IP扁平组网至少节省50%的传输带宽,VOIP移动软交换组网优势,2G编解码-RPE-LTP,模拟的语音,64kbit/s,A/D转换,RPE-LTP语音编码,13k,16k,增加带内信息,64k,TRAU/PCM,64k,VOIP/G.711,TRAU/PCM,模拟的语音,64kbps,A/D转换,RPE-LTP语音编码,13k,16k,增加带内信息,3G编解码,模拟的语音,64kbps,A/D转换,AMR语音编码,12.2k,64k,VOIP/G.711,模拟的语音,64kbps,A/D转换,AMR语音编码,12.2k,64k,VOIP/G.711,AMR,2G编解码-AMR,从华为BSS路标来看，2003.Q4提供，需要手机的支持,3GARM编解码（端到端的编码方案）,AMR3GPP_R99协议规定采用13bit对语音进行每秒8000次的采样（20ms为160个语音包），用ACELP对语音进行编码，支持下面速率：12.2,10.2,7.95,7.4,6.7,5.9,5.15,4.75,和AMR_SID1.8AMR_WB3GPP_R5协议规定用14bit对语音进行每秒16000次采样（20ms为320个语音包），用ACELP对语音进行编码为，支持下面速率：23.85,23.05,19.85,18.25,15.85,14.25,12.65,8.85,6.60和AMR_WB_SID1.75kbpsAMR_WB采用更高的速率和采用率，语音质量更好，但需要有更高的处理能力（华为2006Q4提供）,核心承载网带宽的计算IP包承载在FE口,承载在FE口协议模型,NBUP头可以看做净荷，ETHERNET帧间有间隙，为12byte,(31+4+12+8+20)*8/0.02=30KBPS(31+4+12+8+20+26)*8/0.02=40.4KBPS如果每用户0.025erl，有VAD情况下每1万用户占有带宽为0.0251000020.2kbps5.05M,承载在FE口带宽速率,核心承载网带宽的计算IP包承载在POS口,承载在POS口时采用PPP协议封装（STM-1SDH）,NBUP头可以看做净荷,(31+4+12+8+20)*8/0.02=30KBPS(31+4+12+8+20+9)*8/0.02=33.6KBPS如果每用户0.025erl，有VAD情况下每1万用户占有带宽为0.0251000016.8kbps4.2M,G.711净荷为160bytes，G.729净荷为20bytes,TrFOTranscoderFreeOperation,MSCserver,MGW,MSCserver,MGW,AMRVoice,AMRVoice,节省了TC资源的介入及带来的话质损失,AMRVoice,MSC,MSC,AMRVoice,G.711Voice,AMRVoice,R4阶段基于，话音可以在ATM/IP分组网络上承载，开放TrFO功能，使得3G用户间的通话可以不必经过语音编解码变换器的有损变换处理，最终语音质量得以提高；,在分组网上传输AMR压缩语音及VAD技术的应用，能节省2/3以上的传输带宽。,TrFOfor3G-3G,TrFOfor3G-2G,TrFO的实现-带外的TC协商机制,动态选择codec选择2G-2G(带外协商),动态编解码选择,ReportQoSconditionandbandwidthresourcetoServertimely,Decidewhichkindofvoicecodectobedeployed,MSOFTX3000,MSOFTX3000,G.711orG.729?,SERVER根据承载网带宽情况选择合适的编解码来保证总体的QOS如果带宽足够选择G.711，不够则选择G.729,Destination,Destination,核心网承载QOS流控,UMG8900,MSOFTX3000,router,router,UMG8900,calladmissioncontrol,MSOFTX3000,在MGW对间