SIP协议扩展分析
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协议分析
协议扩展分析
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
••••STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK •••STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
•••STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
•
SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
与传统
Telephony 业务互通的场景
•Encapsulation
–'Transparent' Transit of ISUP Messages –SIP 与ISUP 协议不可能一一映射
–如果为了保证SP1－SP2之间业务的无缝互通，只有SP1发出的ISUP 消息能够透传到SP2–将ISUP 消息封装在SIP 消息体里–Content-Type: application/ISUP
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
•可STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK SIP GW
INVITE SIP Proxy
PSTN
PSTN
IAM
SIP GW
Transaction
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
•••准•STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
SIP GW
INVITE SIP Proxy
PSTN
PSTN
IAM
SIP GW
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
•规则CANCEL
•••
RFC3262-Reliability of Provisional Responses in the Session Initiation RFC3372-Session Initiation Protocol for Telephones (SIP-T): Context RFC3398-Integrated Services Digital Network (ISDN) User Part (ISUP) RFC3578-Mapping of Integrated Services Digital Network (ISDN) User to the Session Initiation Protocol (SIP)Session Initiation Protocol (SIP) Public Switched Telephone STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK •••STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
UserA
UserB UserA
UserB
主叫发起
被叫发STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
UserA
UserB 主叫发起
UserA
UserB
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
UserA
UserB 主叫发起
UserA
UserB
被叫发起
主叫发起
主叫
送导致除重STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
••STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK ••内、求的处理规•STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
UserA
UserB UserA
UserB
被叫UPDATE STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
••••STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK