-
文
档
名
称
文
< br>档
密
级
VoLTE
基本呼叫流程
1
VoLTE
基本呼叫场景
主被叫都是
VoLTE
用户,并且主被叫用户区分
状态,分为
4
种场景
1
、
主叫是
Connect
状态,被叫是
Conn
ect
状态
2
、
主叫是
Connect
状态,被叫是
Idle
状态
3
、
主叫是
Idle
状态,被叫是
Connect
状态
4
、
主叫是
Idle
状态,被叫是
Idle
状态
2
VoLTE
呼叫建立流程详解
语音专有承载的建立时刻是由
IMS
的配置决
定的。如果是在振铃(
180ringring
)之后建
立语音专有承载(即通常说的早振铃),呼叫时延会更短,用户感受会好一些,但是接通后
p>
要等一下才能听到声音,
如果
QCI1
p>
建立失败,
会出现
“
鬼振铃
”
;
如果是在振铃
(
180ringring
)
之前建立语音专有承载(即通常说的晚振铃)
,呼叫时延会增长,
< br>但是接通后马上能听到声
音。
2.1
VoLTE
主被叫用户都是<
/p>
Connect
状态
2.1.1
早振铃
流程图:
2020-2-29
华为保密信息
,
未经授权禁止扩散
第
1
页
,
共
12
页
Caller
主叫拨打被
叫,拨号
文
档
名
称
eNodeB<
/p>
Invite
Invite
100
Trying
100 Trying
MME
SGW+PGW
UPCC
IMS
文
档
密
级
p>
Callee
Invite
Invite<
/p>
100 Trying
100
Trying
180 Ringing
180
Ringing
180 Ringing
180 Ringin
g
PRACK
PRACK
PRACK<
/p>
PRACK
200 OK
200
OK
200 OK
200 OK
200 OK with SDP
200 OK with
SDP
AAR
RAR
Create
Bearer Request
E-RAB Setup
Request
E-RAB Setup
Response
Create Bearer
Response
RAA
Activate
Dedicated EPS Bearer Context
Request
Activate Dedicated EPS Bearer
Context Accept
CCR
CCA
< br>QCI=1
的语音专有
承载资源分配成功
被叫按接听键
被叫振铃
AAA
RAR
RAA
主叫
QCI=1
的语音专有承载建立,流程和被叫的相同
200 OK with
SDP
200 OK with SDP
ACK
ACK
ACK
ACK
主被叫
语音通话
BYE
BYE
RAR
Delete Bearer Request
E-RAB
Release Command
Deactivate EPS Bearer
Context Request
E-RAB Release Response
Deactivate EPS Bearer Context
Accept
Delete Bearer Response
BYE
BYE
RTCP Sender Report
通话结束,主叫
QCI=1
的语音专有承载资源
释放,流程和被叫的
QCI=1
的专有承载释放过程相同
200 OK
200 OK
200
OK
200 OK
RAA
STR
STA
指示会话终止
通话完毕,被叫按挂机<
/p>
2.1.2
晚振铃
流程图
2020-2-29
华为保密信息
,
未经授权禁止扩散
第
2
页
,
共
12
页
Caller
文
档
名
称
eNodeB
Invite
MME
p>
SGW+PGW
UPCC
Invite
p>
100 Trying
RAR
Create
Bearer Request
AAR
AAA
< br>IMS
文
档
密
< br>级
Callee
主叫拨打被<
/p>
叫,拨号
100
Trying
E-RAB Setup
Request
Activate Dedicated EPS Bearer
Context Request
E-RAB Setup
Response
Activate Dedicated EPS Bearer
Context Accept
Create Bearer Response
RAA
CCR
CCA
RAR
RAA
QCI=1
的语音专有<
/p>
承载资源分配成功
被叫
QCI=1
的语音专有承载建立,流程和主叫的相同
Invite
Invite
100 Trying
180
Ringing
被叫振铃
100
Trying
180 Ringing
180 Ringing
PRACK
PRACK
200
OK
200 OK
180 Ringing
PRACK
PRACK
200
OK
被叫按接听键
200 OK
200 OK with SDP
200 OK with
SDP
AAR
RAR
Update
Bearer Request
AAA
RAA
< br>Modify EPS Bearer Context Request
Modify EPS Bearer Context
Accept
Update Bearer Response
主叫
QCI=1
的语音专有承载更新过程,流程和被叫的更新过
程相同
200 OK with SDP
200 OK
with SDP
ACK
ACK
ACK
ACK
主被叫语音通话
BYE
BYE
RAR
Delete Bearer
Request
E-RAB Release
Command
Deactivate EPS Bearer Context
Request
E-RAB Release Response
Delete Bearer
Response
BYE
RTCP Sender Repor
t
通话结束,主叫
QCI=1
的语音专
有承载资源释放,流程和被叫的
QCI=1
的专有承载释放过程
相同
200 OK
200 OK
200
OK
200 OK
Deactivate EPS
Bearer Context Accept
BYE
RAA<
/p>
STR
STA
指示会话终止
通话完毕,被叫按挂机
2.2
< br>VoLTE
主叫用户
Connect
状态,被叫用户
IDLE
状态
2.2.1
早振铃
流程图:
2020-2-29
华为保密信息
,
未经授权禁止扩散
第
3
页
,
共
12
页
Caller
主叫拨打被
叫,拨号
文
档
名
称
eNodeB<
/p>
Invite
Invite
100
Trying
100 Trying
SBC
把
Invite
消息发给被叫侧的
PGW
,
PGW
发送
< br>DDN
给
MME
,触发寻呼被叫
文
档
密
级
p>
MME
SGW+PGW
< br>UPCC
IMS
Callee
P
aging
Downlink Data
Notification
Downlink Data
Notification ACK
Invite
SBC
转给
PGW
的
Invite
对于
PGW
来讲就是用户报文
Invite
Service
Request
Initial Context Setup
Request
Initial Context Setup
Response
Modify Bearer
Request
Modify Bearer
Request
Modify Bearer
Response
Modify Bearer Response
Invite
Invite
100
Trying
100 Trying
180
Ringing
180 Ringing
180
Ringing
180 Ringing
PRACK
PRACK
PRACK
PRACK
200 OK
200 OK
200
OK
200 OK
200 OK with
SDP
200 OK with
SDP
AAR
RAR
Create
Bearer Request
E-RAB Setup
Request
E-RAB Setup
Response
Create Bearer
Response
RAA
Activate
Dedicated EPS Bearer Context
Request
Activate Dedicated EPS Bearer
Context Accept
CCR
CCA
< br>QCI=1
的语音专有
承载资源分配成功
被叫按接听键
被叫振铃
AAA
RAR
RAA
200 OK with SDP
主叫
QCI=1
的语音专有承载建立,流程和被叫的
相同
200 OK with SDP
ACK
ACK
ACK
ACK
主被叫语
音通话
BYE
BYE
RAR
Delete Bearer Request
E-RAB
Release Command
E-RAB Release Response
Delete Bearer Response
BYE
BYE
RTCP Sender Report
通话结束,主叫
QCI=1
的语音专有承载资源释放,流程和
被叫的
QCI=1
的专有承载释放过程相同
200 OK
200 OK
200
OK
200 OK
RAA
STR
STA
通话完毕,被叫按挂机
指示会话终止<
/p>
Deactivate EPS Bearer Context
Request
Deactivate EPS Bearer Context
Accept
2.2.2
晚振铃
流程图
2020-2-29
华为保密信息
,
未经授权禁止扩散
第
4
页
,
共
12
页
Caller
文
档
名
称
eNodeB
Invite
MME
p>
SGW+PGW
UPCC
Invite
p>
100 Trying
RAR
Create
Bearer Request
AAR
AAA
< br>IMS
文
档
密
< br>级
Callee
主叫拨打被<
/p>
叫,拨号
100
Trying
E-RAB Setup
Request
Activate Dedicated EPS Bearer
Context Request
E-RAB Setup
Response
Activate Dedicated EPS Bearer
Context Accept
Create Bearer Response
RAA
CCR
CCA
PGW
收到
RAR
消息后发送
CreateBearerRequest
创建专有承载,
MME
收
到后发现被叫是
I
DLE
态,发
Paging
消息寻
p>
呼被叫
RAR
RAA
AAR
AAA
Invite
QCI=
1
的语音专有
承载资源分配成功
RAR
Create Bearer
Request
Downlink Data
Notification
Downlink Data
Notification ACK
RAA
Paging
Invite
Service
Request
Initial Context Setup
Request
Initial Context Setup
Response
Modify Bearer
Request
Modify Bearer
Request
Modify Bearer
Response
Modify Bearer
Response
E-RAB Setup
Request
E-RAB Setup
Response
Create Bearer Response
Invite
Invite
Activate
Dedicated EPS Bearer Context
Request
Activate Dedicated EPS Bearer
Context
Accept
CCR
CCA
100
Trying
180 Ringing
180 Ringing
PRACK
PRACK
200
OK
200 OK
100
Trying
180
Ringing
被叫振铃
180 Ringing
PRACK
PRACK
200
OK
被叫按接听键
200 OK
200 OK with SDP
200 OK with
SDP
AAR
RAR
Update
Bearer Request
AAA
RAA
< br>Modify EPS Bearer Context Request
Modify EPS Bearer Context
Accept
Update Bearer Response
主叫
QCI=1
的语音专有承载更新过程,流程和被叫的更新过
程相同
200 OK with SDP
200 OK
with SDP
ACK
ACK
ACK
ACK
主被叫语音通话
BYE
BYE
RAR
Delete Bearer
Request
E-RAB Release
Command
Deactivate EPS Bearer Context
Request
E-RAB Release Response
Delete Bearer
Response
BYE
RTCP Sender Repor
t
通话结束,主叫
QCI=1
的语音专
有承载资源释放,流程和被叫的
QCI=1
的专有承载释放过程
相同
200 OK
200 OK
200
OK
200 OK
Deactivate EPS
Bearer Context Accept
BYE
RAA<
/p>
STR
STA
指示会话终止
通话完毕,被叫按挂机
2020-2-29
华为保密信息
,
未经授权禁止扩散
第
5
页
,
共
12
页
文
档
p>
名
称
文
档
密
级
2.3
VoLTE
主叫用户
IDLE
状态,被叫用户
Connect
状态
2.3.1
早振铃
流程图:
Caller
eNodeB
MME
Service
Request
Initial Context Setup
Request
Initial Context Setup
Response
Invite
SGW
+PGW
UPCC
IMS
Callee
Invite
主叫拨打被叫,拨
号,由
于主叫是
IDLE
状态,
RRC
连
接建立,
Service
Request
流程
Modify
Bearer Request
Modify Bearer
Request
Modify Bearer
Response
Modify Bearer
Response
Invite
100
Trying
100 Trying
Invite
Invite
100 Trying
100
Trying
180 Ringing
180
Ringing
180 Ringing
180 Ringin
g
PRACK
PRACK
PRACK<
/p>
PRACK
200 OK
200
OK
200 OK
200 OK
200 OK with SDP
200 OK with
SDP
AAR
RAR
Create
Bearer Request
E-RAB Setup
Request
E-RAB Setup
Response
Create Bearer
Response
RAA
Activate
Dedicated EPS Bearer Context
Request
Activate Dedicated EPS Bearer
Context Accept
CCR
CCA
< br>QCI=1
的语音专有
承载资源分配成功
被叫按接听键
被叫振铃
AAA
RAR
RAA
200 OK with SDP
主叫
QCI=1
的语音专有承载建立,流程和被叫的
相同
200 OK with SDP
ACK
ACK
ACK
ACK
主被叫语
音通话
BYE
BYE
RAR
Delete Bearer Request
E-RAB
Release Command
E-RAB Release Response
Delete Bearer Response
BYE
BYE
RTCP Sender Report
通话结束,主叫
QCI=1
的语音专有承载资源释放,流程和
被叫的
QCI=1
的专有承载释放过程相同
200 OK
200 OK
200
OK
200 OK
RAA
STR
STA
通话完毕,被叫按挂机
指示会话终止<
/p>
Deactivate EPS Bearer Context
Request
Deactivate EPS Bearer Context
Accept
2020-2-29
华为保密信息
,
未经授权禁止扩散
第
6
页
,
共
12
页
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