文档介绍:软交换技术交流-协议与软交换呼叫流程VOIP概念VOIP-Protocol定义了将语音通过IP网进行传送的方法。软交换VOIP化是将CS域的语音电话打包后通过IP骨干网传送。同在IP骨干网传送,实现PS域和CS域承载网的融合。提高设备的利用率,减少营运成本。有利于新业务的开发和使用。IP专有电路---workHLR,SGSNMcPSTNBSSMSCServerIPSCTPISUPLLM3UAC-MGWTSCServerC-MGWSGWSTPMcBSSAPSCTPM3UAIPLLTCAPMAPBSSAP+workHLR,SGSNTCAPMAPBSSAP+IPSCTPM3UALLIPBCPIPBCPTCAPMAPBSSAP+workHLR,SGSNMcPSTNPSTNBSSBSSMSCServerIPSCTPISUPLLM3UAIPSCTPISUPLLM3UAC-MGWM-MGwTSCServerC-MGWM-MGwSGWSTPMcBSSAPSCTPM3UAIPLLTCAPMAPBSSAP+PBSSAPSCTPM3UAIPLLTCAPMAPBSSAP+workHLR,SGSNTCAPMAPBSSAP+PPHYTCAPMAPBSSAP+IPSCTPM3UALLIPBCPIPBCPTCAPMAPBSSAP+PPHYTCAPMAPBSSAP+-///(x=1,2….6)protocolCS2IPBCP :bearercontroltunnelingprotocol :bearercontrolprotocol SDPRFC4566:SessionDescriptionProtocolNb接口 . . RFCRTP3550:TransportProtocolforReal-TimeApplications. UDPRFC768:UserDatagramProtocol. IPRFC791(v4)2460(v6):基本运用在VOIP网络中,MSCServer之间(NC接口)消息中的控制信息ActionIndicator(connectforward)haracteristics(IP/RTP)BearerControlInformationBearerControlTunneling(Tunnellingtobeused)&receivingEntitiesIPbearerswithNbframingMGW之间通过IPBCP和Nb-UP初始化消息建立用户面的连接。(MC接口)协议(NC接口)协议与软交换呼叫流程