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BICC协议与软交换呼叫流程.ppt



6
Q.IPBCP
ISUP
NbUP over RTP over IP
TDM
PCM/AMR
NbUP RTP UDP IP L1
ISUP MTP3 MTP2
MTP1
PCM
TDM L1

2008-11-27
新增协议规范
› BICC
TS 23.205 Bearer Independent CS Core Network. Q.1902.x (x=1,2….6) for BICC protocol CS2
软交换技术交流 - VOIP 和 BICC协议

1

2008-11-27
VOIP概念
› VOIP-Voice Over Internet 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。
Softswitc h
专有电路 ---共用IP承载网

4

2008-11-27
语音IP化网络控制平面信令协议栈
SIGTRAN
BSS
SS7 Network HLR,SGSN
MAP
B S
S
TCAP
A P
+
SCCP
MTP3
MTP2
PHY
MAP TCAP
BBR SSA S SN AAA PPP +
SCCP
M3UA
SCTP
IP
LL
MAP
B S
S
TCCAAPP
A P
+
SCCP
M3UA
SCTP
IP
PHY
SIGTRAN
SS7 Network
HLR, SGSN
SGW STP
A
BSSAP SCCP MTP3 MTP2 PHY
MSC Server
Mc
Nc IPBCP
IPBCP GHC.2P48
M3UA SCTP
IP LL

7

2008-11-27
BICC 基本运用
在VOIP网络中,MSCServer之间(NC接口)使用BICC协议
Control Layer
Control BICC Control BICC Control
Server
Server
Server
Access Signaling
MGW
To Access Network/s
› 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。

2

2008-11-27
VoIP 网络模型

3

2008-11-27
软交换核心网IP化
Mobile
Softswitc h
ISUP TDM
Mobile Softswitch
Mobile
Softswitc h
BICC IP
Mobile
Nb
Core Network Transport Network
MMGGWW
PSTN/ ISDN
Bearer Control User-plane Transport
BSSAP
SCCP MTP3 MTP2 MTP1
BSSAP
TDM PCM
TDM L1
Q.IPBCPBICC/GCP
M3UA SCTP
IP LL

9

2008-11-27
IPBCP 协议模型
• MGW之间通过IPBCP和Nb-UP初始化消息建立用户面的连接。 • IPBCP 是通过H.248 (MC接口)和 BICC协议(NC接口)中传送
Server
BICC
Server
GCP GCP
Q.1990
MGW
Q.1970
Tunnelling PDU generating & receiving
MGW
bearer/connectivity network
MGW
MGW
Access Signaling
Connectivity Layer

8

2008-11-27
BICC消息中的控制信息
› Action Indicator (connect forward) › BNC Identifier › BIWF Address › Codec List › Single Codec › BNC Characteristics (IP/RTP) › Bearer Control Information › Bearer Control Tunneling (Tunnelling to be used)
Tunnelled Protocol Indicator{32}: IPBCP
› IPBCP
Q.1990:BICC bearer control tunneling protocol Q.1970:BICC bearer control protocol SDP RFC 4566 :Session Description Protocol
› Nb 接口
TS 29.414 Core Network Nb data Transport and Transport Signaling. TS 29.415 Core Network Nb Interface user Plane protocols. RFC RTP 3550:Transport Protocol for Real-Time Applications. UDP RFC 768:User Datagram Protocol. IP RFC 791(v4) 2460(v6):Internet Protocol
BCTP Indicator
Field
Q.1990
IPBCP SDP
Q.1970

11

2008-11-27
BICC消息中BCI 举例
BCTP Version Indicator{0}: Version 1
BCTP Version Error Indicator (BVEI){0}: No indication
IPBCP BICC M3UA SCTP IP LL
TSC Server
SGW STP
ISUP
Mc
M3UA
SCTP
IP
LL
ISUP MTP3 MTP2 PHY
PSTN
Nb
CM - MGWw
CM -MGWw

5

2008-11-27
语音IP化网络用户平面协议栈
BRSNCC
A Inter MMGGWW
Entities
IP bearers with Nb framing
Q.1990
MGW
Q.1970

10
▪Leabharlann 2008-11-27Bearer Control Information (BCI)
BCI - 承载控制信息,在BICC协议中APM消 息中传送
Bearer Control Information
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