协议基础架构
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
•条件下，网络状况差异较大，如何保证••STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
基于UrA
UrB UrA
UrB
可靠消息
T1
2 T1
1等待响234564T1
from the rver to STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
INVITE sip:werner.heinberg@munich.de Via Max-Forwards: 70
To: Heinberg <sip:werner.heinberg@munich.de>飞快的近义词
From: E. Schroedinger Call-ID: 10@100.101.102.103
CSeq Contact: <sip:schroed5244@>
Content-Type: application/sdp Content-Length: 159
SIP/2.0 200 OK
黄色实线
Via To: Heinberg <sip:werner.heinberg@munich.de>;tag=314159 From: E. Schroedinger Call-ID: 10@100.101.102.103 CSeq Contact: <sip:werner.heinberg@200.201.202.203> Content-Type: application/sdp Content-Length: 159
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK •这需要服务•最终响应可能不会立即返回——被叫振铃定时器30s
UrA
UrB 64T1
UrA
UrB
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
三次握手UrA
UrB
UrA
UrB
INVITE
T164T1
T1
T1
好用的素颜霜不可靠消息
不可靠消息
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
••• A regular transaction is any transaction with a method other than STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
UrA
Proxy 1
UrB
Proxy 2
INVITE Transaction
UrA
Proxy 1
UrB
Proxy 2
INVITE Transaction
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NE
TWORK
Transaction Recv 300-699Send ACK 300-699 to TU
101-199 from TU
Send
Transport Error Inform TU
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK Transaction •状态•ACK •ACK •ACK
谁维护呢？
•••Answer:
Question:
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
CANCEL Transaction
UrA
Proxy 1
UrB
Proxy 2
INVITE Transaction
Non-INVITE Transaction
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
白羊座性格Transaction ••••Transaction Layer
CANCEL Client Transaction •
响应，Question:
Answer:
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
UrA
Proxy 1
UrB
Proxy 2
INVITE Transaction
INVITE Transaction
参致)STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
••••CT
Proxy
ST
Request
Request
快捷键大全
电气施工Request
Respon
Respon
Respon
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
••••non-failure respons to requests with specific •STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
A dialog is identified by a INVITE sip:werner.heinberg@munich.de Via: SIP/2.0/UDP 100.101.102.103:5060;branch=z9hG4bKmp17a Max-Forwards: 70
To From Call-ID CSeq: 1 INVITE
Contact: <sip:schroed5244@> Content-Type: application/sdp Content-Length: 159
SIP/2.0 200 OK
Via: SIP/2.0/UDP 100.101.102.103:5060;branch=z9hG4bKmp17a To From Call-ID CSeq: 1 INVITE
Contact: <sip:werner.heinberg@200.201.202.203> Content-Type: application/sdp Content-Length: 159
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
UrA
Proxy 1
UrB
Proxy 2
Create Dialog
Dialog
UrA UrB
UrA UrB
STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
INVITE
←18x
200 STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK Dialog
Dialog
•Call Leg ）•次••
外的
上巳节ST
CT Request
Respon ST CT Request Respon ST
CT Request Respon STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
长吁STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
•can be invited veral times, by different calls, SDP ur name, ssion id, network type, address type, and address •STATE KEY LABORATORY OF SWITCHING TECHNOLOGY AND TELECOMMUNICATION NETWORK
UrC
Mix
UrA
UrB
入•
