核心網(wǎng)中不同語音編碼傳送以及帶寬計算(客服系統(tǒng)呼叫中心參考)

1、HUAWEI CVoIP Bandwidth Calculation of FE InterfaceNBUPRTPUDPIPEthernet4 byte12 bytes8 bytes20 bytes26 bytesCodec typePackage intervalNet voiceVoice codec speedG.71120 ms160 bytes64 kbpsG.72920 ms20 bytes8 kbpsAMR 12.220 ms31 bytes12.2 kbpsInformation of G.711, G.729 and AMRG.711： (160+4+26+20+8+12)*

2、8/0.02 = 92.00 kbpsG.729： (20+4+26+20+8+12)*8/0.02 = 36.00 kbpsAMR12.2: (31+4 +26+20+8+12)*8/0.02 = 40.40 kbpsIf combined with VAD about 50% bandwidth will be saved Bandwidth calculation basing on FE interfaceTransmission model basing on FE portsHUAWEI CVoIP Bandwidth Calculation of POS InterfaceCod

3、ec typePackage intervalNet voiceVoice codec speedG.71120 ms160 bytes64 kbpsG.72920 ms20 bytes8 kbpsAMR12.220 ms31 bytes12.2 kbpsInformation of G.711, G.729 and AMRG.711： (160+4+12+8+20+9)*8/0.02 = 85.20 kbpsG.729： (20+4+12+8+20+9)*8/0.02 = 29.20 kbpsAMR12.2: (31+4+12+8+20+9)*8/0.02 = 33.60 kbpsIf co

4、mbined with VAD about 50% bandwidth will be saved Bandwidth calculation basing on POS interfaceTransmission model basing on POS portsNBUPRTPUDPIPPPP4 bytes12 bytes8 bytes20 bytes9 bytesHUAWEI CVOIP Solution for G/TMSCBeijing XianGuangzhouShenyangShanghai WuhanChenduNanjingTraditional solution for G/

5、TMSCHuawei Softswitch VOIP solution for G/TMSCEach voice channel occupy 64K bps.Combined with VAD and G.711/G.729 dynamic conversion, basing on POS and FE interface, in average one call occupies 27.0K bps.l Using tradition solution it will need 94,815 E1. l According to Huawei Softswitch MSC, the to

6、tal 40,000 E1 have been used. l In China, the rent charge for one E1 are approximately 2000 RMB per month for intra-province transmission, and 15000 RMB per month for inter-province transmission.VOIP solution can help CMCC save :（94,815E140,000E1）*15,000 822,225,000 RMB （99,422,612 USD）per month, l

7、99,422,612 USD*12= 1,193,071,344 USD per year.HUAWEI CTraditional Solution for VMSCBasic Traffic model:If the BSC support 100 K mobile subscribers, acording to erl table it will need 2526 E (82 E1), so in traditional solution it will need 130 E1 for long distance transmission : PSTN-MSC: 2526*30%+25

8、26 *30%=1516 E ( 48 E1) BSC-MSC: 2526 E (82 E1)BSCMSCSmall cityLarge cityPSTNBSCPSTNTraditional solution for VMSCl30% MS To PSTN l30% PSTN To MSl40% MS-MS l80% Local terminationl0.025 erl / subs,lAverage holding time: 60slGOS: 0.01HUAWEI CLocal Call Local Switching solution for VMSC If the BSC suppo

9、rt 100 K mobile subscribers, acording to erl table it will need 2526 E (82 E1) In softswitch local call local switching solution it will need 7 E1 for long distance transmission : PSTN-MSC: 0 BSC-MSC: 2526 *40%*(1-80%)=203E (7 E1) Combined with AMR 12.2 basing on FE interface and VAD technology, one

10、 call occupies 20.2 kbps, it will only need 3 E1. PSTN-MSC: 0 BSC-MSC : 203/3=67 E (3 E1) LCLS Solution for VMSCl 30% MS To PSTN l 30% PSTN To MSl 40% MS-MS l 80% Local terminationl 0.025 erl / subs,l Average holding time: 60sl GOS: 0.01Basic Traffic model:MSCServerBSCSmall cityLarge cityPSTNBSCPSTN

11、MGWTDM/IPHuawei confidentialHUAWEI移動軟交換技術(shù)專題移動軟交換技術(shù)專題u 移動軟交換的演進移動軟交換的演進u 軟交換協(xié)議介紹軟交換協(xié)議介紹u VOIP技術(shù)以及編解碼技術(shù)技術(shù)以及編解碼技術(shù)u 移動軟交換可靠性解決方案移動軟交換可靠性解決方案u QOS和和IP網(wǎng)絡(luò)安全網(wǎng)絡(luò)安全u MNP和和MVNO解決方案解決方案u SOSM監(jiān)聽解決方案監(jiān)聽解決方案Huawei confidentialHUAWEIMSC Server 1MSC Server 2IP BackboneLocal PLMNLocal PLMNLocal PLMNLocal PLMNLocal PLMN

12、MGWMGWMGWMGWMGW支持IP承載語音，包括G.711/G.729/G.723/AMR 等多種語音編碼方式支持靜音檢測技術(shù)VAD優(yōu)點： IP扁平組網(wǎng) 至少節(jié)省50%的傳輸帶寬VOIP移動軟交換組網(wǎng)優(yōu)勢移動軟交換組網(wǎng)優(yōu)勢Huawei confidentialHUAWEI2G 編解碼編解碼- RPE-LTPHuawei confidentialHUAWEI3G 編解碼編解碼Huawei confidentialHUAWEI2G 編解碼編解碼 -AMRChannelSource codec bit-rateTCH/AFS12.2 kbit/s (GSM EFR)10.2 kbit/s7.95

13、 kbit/s7.40 kbit/s6.70 kbit/s5.90 kbit/s5.15 kbit/s4.75 kbit/sTCH/AHS7.95 kbit/s7.40 kbit/s6.70 kbit/s5.90 kbit/s5.15 kbit/s4.75 kbit/sHuawei confidentialHUAWEI3G ARM 編解碼（端到端的編碼方案）編解碼（端到端的編碼方案） AMR 3GPP_R99 協(xié)議規(guī)定 采用13bit對語音進行每秒8000次的采樣（20ms為160個語音包），用ACELP對語音進行編碼，支持下面速率：12.2,10.2,7.95,7.4,6.7,5.9,5.1

14、5,4.75,和AMR_SID 1.8 AMR_WB3GPP_R5 協(xié)議規(guī)定用14bit對語音進行每秒16000次采樣（20ms為320個語音包），用ACELP對語音進行編碼為，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_SID 1.75 kbpsAMR_WB 采用更高的速率和采用率，語音質(zhì)量更好，但需要有更高的處理能力（華為2006Q4提供）Huawei confidentialHUAWEI核心承載網(wǎng)帶寬的計算核心承載網(wǎng)帶寬的計算IP包承載在包承載在FE口口承載在FE口協(xié)議模型編解碼編解碼凈荷凈荷IP包長

15、包長EHERNET包長包長IP速率速率kbpsETHERNET速率速率kbps有有VAD速率速率kbpsAMR 12.2 20ms31475101123040.420.2AMR 4.75 20ms12456821222.432.816.464K數(shù)據(jù)業(yè)務(wù)數(shù)據(jù)業(yè)務(wù) 5ms4048411012134.4176NBUPRTPUDPIPETHERNET4bytes12bytes8bytes20bytes26bytesNBUP頭可以看做凈荷，ETHERNET幀間有間隙，為12byte (31+4+12+8+20)*8/0.02=30KBPS(31+4+12+8+20+26)*8/0.02=40.4KBPS

16、如果每用戶0.025erl，有VAD情況下每 1 萬用戶占有帶寬為0.0251000020.2kbps5.05 M 承載在FE口帶寬速率Huawei confidentialHUAWEI核心承載網(wǎng)帶寬的計算核心承載網(wǎng)帶寬的計算IP包承載在包承載在POS口口承載在POS口時采用PPP協(xié)議封裝（STM-1 SDH）編解碼編解碼凈荷凈荷IP包長包長PPP包長包長IP速率速率kbpsPPP速率速率kbps有有VAD速率速率kbpsAMR 12.2 20ms31475843033.616.8AMR 4.75 20ms124566522.4261364K數(shù)據(jù)業(yè)務(wù)數(shù)據(jù)業(yè)務(wù) 5ms4048493134.414

17、8.8NBUPRTPUDPIPPPP4bytes12bytes8bytes20bytes9bytesNBUP頭可以看做凈荷頭可以看做凈荷(31+4+12+8+20)*8/0.02=30KBPS(31+4+12+8+20+9)*8/0.02=33.6KBPS如果每用戶0.025erl，有VAD情況下每 1 萬用戶占有帶寬為0.0251000016.8kbps4.2 M G.711凈荷為凈荷為 160 bytes ，G.729凈荷為凈荷為 20 bytesHuawei confidentialHUAWEITrFO Transcoder Free OperationMSC serverMGWMSC

18、serverMGWAMR VoiceAMR Voice節(jié)省了TC資源的介入及帶來的話質(zhì)損失AMR VoiceAMR VoiceG.711 VoiceAMR VoiceR4階段基于，話音可以在ATM/IP分組網(wǎng)絡(luò)上承載，開放TrFO功能，使得3G用戶間的通話可以不必經(jīng)過語音編解碼變換器的有損變換處理，最終語音質(zhì)量得以提高；在分組網(wǎng)上傳輸AMR壓縮語音及VAD技術(shù)的應(yīng)用，能節(jié)省2/3以上的傳輸帶寬。Huawei confidentialHUAWEITrFO for 3G-3GMSOFTXUMGMSOFTXUMGRNCRNCIP BackboneH.248H.248BICCIUIUNbNbNode

19、BNode BMSSelected Codec=AMREnd to End AMR without transcoderAMR/NbUP/RTP/UDP/IPAMR/IUUP/AAL2/ATMAMR/IUUP/AAL2/ATMAMR/RLC/MAC/.AMR/RLC/MAC/.Huawei confidentialHUAWEITrFO for 3G-2GMSOFTXUMGMSOFTXUMGRNCBSCIP BackboneH.248H.248BICCIUANbNbNode BBTSMSSelected CodeC = AMRAMR to the EDGE of Core networkAMR/

20、NbUP/RTP/UDP/IPAMR/IUUP/AAL2/ATMG.711/TDMAMR/RLC/MAC/.FR/RLC/MAC/.MS FR/EFR/HR in BSSHuawei confidentialHUAWEITrFO的實現(xiàn)的實現(xiàn)-帶外的帶外的TC協(xié)商機制協(xié)商機制TransitNetworkRNCMSCServerMGWMSCServerMGWRNCRANAPRANAPMGwControlMGwControlOoB CodecNegotiationControlPlaneUserPlaneRadio BearerIu BearerCN bearerIu BearerRadio Bea

21、rerEnd to end connectionBearer ReqBearer ReqBearer ReqMEMEOoB CodecNegotiationOoB CodecNegotiationHuawei confidentialHUAWEI動態(tài)選擇動態(tài)選擇codec選擇選擇 2G-2G(帶外協(xié)商帶外協(xié)商)MSOFTXUMGMSOFTXUMGBSCBSCIP BackboneH.248H.248BICCAANbNbBTSBTSMSSelected CodeC = G.711G.711/RTP/UDP/IPG.711/TDMG.711/TDMFR/RLC/MAC/.FR/RLC/MAC/.M

22、SOFTXUMGMSOFTXUMGBSCBSCIP BackboneH.248H.248BICCAANbNbBTSBTSMSSelected Codec = AMRAMR/NbUP/RTP/UDP/IPG.711/TDMG.711/TDMFR/RLC/MAC/.FR/RLC/MAC/.Huawei confidentialHUAWEI動態(tài)編解碼選擇動態(tài)編解碼選擇UMG8900UMG8900IP NetworkSERVER根據(jù)承載網(wǎng)帶寬情況選擇合適的編解碼來保證總體的QOS如果帶寬足夠選擇G.711，不夠則選擇G.729DestinationDestinationHuawei confidentialHUAWEI核心網(wǎng)承載核心網(wǎng)承載QOS流控流控MSOFTX3000Sample requestLSPLSPLSPLSPLSPTraffic flowcall admission controlSample responseMSOFTX3000n 在MGW對間維持采樣呼叫，監(jiān)控承載質(zhì)量n 通過采用呼叫上報的承載質(zhì)量進行呼叫接入控制n UMG自動監(jiān)控QOS質(zhì)量，并實時上報給SERVERn 中國移動T項目已經(jīng)應(yīng)用Huawei confident