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)

HUAWEIConfidential1：(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•BandwidthcalculationbasingonFEinterfaceTransmissionmodelbasingonFEportsHUAWEIConfidential2：(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•BandwidthcalculationbasingonPOSinterfaceTransmissionmodelbasingonPOSportsNBUPRTPUDPIPPPP4bytes12bytes8bytes20bytes9bytesHUAWEIConfidential3’anGuangzhouShenyangShanghaiWuhanChenduNanjingTraditionalsolutionforG/TMSCHuaweiSoftswitchVOIPsolutionforG/TMSCEachvoicechanneloccupy64Kbps.CombinedwithVADandG.711/G.729dynamicconversion,basingonPOSandFEinterface,inaverageonecalloccupies27.0Kbps.Usingtraditionsolutionitwillneed94,815E1.AccordingtoHuaweiSoftswitchMSC,thetotal40,000E1havebeenused.InChina,therentchargeforoneE1areapproximately2000RMBpermonthforintra-provincetransmission,and15000RMBpermonthforinter-provincetransmission.VOIPsolutioncanhelpCMCCsave:（94,815E1－40,000E1）*15,000＝822,225,000RMB（99,422,612USD）permonth,99,422,612USD*12=1,193,071,344USDperyear.HUAWEIConfidential4(82E1),sointraditionalsolutionitwillneed130E1forlongdistancetransmission:PSTN-MSC:2526*30%+2526*30%=1516E(48E1)BSC-MSC:2526E(82E1)BSCMSCSmallcityLargecityPSTNBSCPSTNTraditionalsolutionforVMSC30%MSToPSTN30%PSTNToMS40%MS-MS80%Localtermination0.025erl/subs,Averageholdingtime:60sGOS:0.01HUAWEIConfidential5(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%MSToPSTN30%PSTNToMS40%MS-MS80%Localtermination0.025erl/subs,Averageholdingtime:60sGOS:0.01BasicTrafficmodel:MSCServerBSCSmallcityLargecityPSTNBSCPSTNMGWTDM/IPHuaweiconfidentialHUAWEI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HuaweiconfidentialHUAWEIMSCServer1MSCServer2IPBackboneLocalPLMNLocalPLMNLocalPLMNLocalPLMNLocalPLMNMGWMGWMGWMGWMGW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HuaweiconfidentialHUAWEI2G编解码-RPE-LTP模拟的语音64kbit/sA/D转换RPE-LTP语音编码13k16k增加带内信息64kTRAU/PCM64kVOIP/G.711TRAU/PCM模拟的语音64kbpsA/D转换RPE-LTP语音编码13k16k增加带内信息HuaweiconfidentialHUAWEI3G编解码模拟的语音64kbpsA/D转换AMR语音编码12.2k64kVOIP/G.711模拟的语音64kbpsA/D转换AMR语音编码12.2k64kVOIP/G.711AMRHuaweiconfidentialHUAWEI2G编解码-AMRChannelSourcecodecbit-rateTCH/AFS12.2kbit/s(GSMEFR)10.2kbit/s7.95kbit/s7.40kbit/s6.70kbit/s5.90kbit/s5.15kbit/s4.75kbit/sTCH/AHS7.95kbit/s7.40kbit/s6.70kbit/s5.90kbit/s5.15kbit/s4.75kbit/s从华为BSS路标来看，2003.Q4提供，需要手机的支持HuaweiconfidentialHUAWEI3GARM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_SID1.8•AMR_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）HuaweiconfidentialHUAWEI核心承载网带宽的计算－IP包承载在FE口承载在FE口协议模型编解码净荷IP包长EHERNET包长IP速率kbpsETHERNET速率kbps有VAD速率kbpsAMR12.220ms31＋475101＋123040.420.2AMR4.7520ms12＋45682＋1222.432.816.464K数据业务5ms40＋484110＋12134.4176NBUPRTPUDPIPETHERNET4bytes12bytes8bytes20bytes26bytesNBUP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0.025×10000×20.2kbps＝5.05M承载在FE口带宽速率HuaweiconfidentialHUAWEI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）编解码净荷IP包长PPP包长IP速率kbpsPPP速率kbps有VAD速率kbpsAMR12.220ms31＋475843033.616.8AMR4.7520ms12＋4566522.4261364K数据业务5ms40＋48493134.4148.8NBUPRTPUDPIPPPP4bytes12bytes8bytes20bytes9bytesNBUP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0.025×10000×16.8kbps＝4.2M•G.711净荷为160bytes，G.729净荷为20bytesHuaweiconfidentialHUAWEITrFOTranscoderFreeOperationMSCserverMGWMSCserverMGWAMRVoiceAMRVoice节省了TC资源的介入及带来的话质损失AMRVoiceMSCMSCAMRVoiceG.711VoiceAMRVoiceR4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。Hu