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Information channel / Communication Technology Articles / VoLTE / text
Basic calling of VoLTE
28
Decem
ber
Basic calling for VoLTE
1
Detailed explanation of VoLTE calling
signaling process (with packet
capture screenshots...
2
Why is my mobile 4G signal never
full? (R...
3
Basic Concept: What is an "anchor" in
VoLTE...
4
VoLTE Voice AMR-NB AMR-W...
5
What is MDT?
6
4G core network protocol:
Introduction to GTPv2 protocol...
LTE user calls LTE user
In an LTE network, the process of an LTE user calling an LTE user is shown in FIG. 1 .
Figure 1 LTE user calling LTE user
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1. An LTE user initiates a call.
2. The MMTel AS performs calling service processing.
3. After completing the calling service processing, the MMTel AS routes the call back to
the S-CSCF; the S-CSCF queries the ENUM and routes the call to the called party.
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stray frog
commented on
Basic Concept: What is "Anchor"
in VoLTE?
There are two concepts. Anchoring
means that business processing needs
to be anchored in the IMS domain.
TADS is only for access domain
4. On the called side, the call is routed to the I-CSCF that provides services to the called
user, and the I-CSCF sends a call request to the S-CSCF.
selection. In fact, the two are somewhat
similar. SDS ADS means service
domain selection and access domain
5. After the MMTel AS performs the called service processing, the MMTel AS routes the
call back to the S-CSCF; the S-CSCF triggers the SCC AS to perform domain selection
selection. collectively referred to as
domain selection
(ie, select the domain where the called party landed), and select the LTE network to
access the called user.
lililala
commented on
6. The S-CSCF connects the call request to the called user through the P-CSCF.
VoLTE is coming, 5G will come
sooner or later, how to break the
signaling analysis in the era of big
There is no such thing as 'you can do
data network optimization?
X in software A but cannot do X in
7. Bearer establishment.
software B'. That is, you can do
anything in any software - the
difference is the difficulty
CS user calls LTE user
If a CS user calls an LTE user in a non-discrete number segment (the LTE user accesses
through the LTE network), the routing data from this number segment to the IMS network can
be configured on the MGCF to route the call directly to the IMS network for processing. The
specific process is shown in Figure 2.
lililala
commented on
Bright blind your titanium alloy
eyes 4G manufacturer's version of
"Apprenticeship", Zhuge Liang
Welfare 3D Ericsson, Alan, Nokia
turned out to be a lion in the
Siemens,
etc., all of
veterans
countryside
tothem
start are
a siege?
of the dynasty, and they have tried to
use GSM . I thought it was a matter of
network planning, but I have consulted
Figure 2 CS user calling LTE user
with you, and we will definitely be able
to improve the quality of calls and
capture OTT.
lililala
commented on
Basic Concept: What is "Anchor"
in VoLTE?
Taking such a user calling a CS user
as an example, the call process is
shown in Figure 1 .
Can't get the login name to
on
comment
What is the difference in the
resource occupation of VoLTE
voice AMR-NB AMR-WB?
For VoLTE-VOLTE, when the call is
established, there will be an UPDATE
message for voice coding negotiation,
and the call will be performed
according to the highest coding rate
supported by both parties.
fdd6688fdd
commented on
Subscription and notification
signaling process in IMS network
notify is ims network -> ue terminal
Notify 200 ue terminal -> ims network
1. The calling user initiates a call in the CS domain.
kdsswu
commented on
Frequent PDN connectivity rejects
2. The GMSC queries the HLR for the called routing information, and routes the call to the
MGCF according to the HLR's instructions.
Hello, what is the name of the log
parsing tool you are using, can you
send a copy to your email, thank you
3. The MGCF routes the call to the IMS network according to the routing configuration of
its called number segment.
4. After the MMTel AS performs the called service processing, the MMTel AS routes the
call back to the S-CSCF; the S-CSCF triggers the SCC AS to perform domain selection
(ie, select the domain where the called party landed), and select the LTE network to
access the called user.
very much, the email address is
790694870@qq.com.
motorolan
commented on
Basic calling of VoLTE
The picture is wrong, it corresponds to
the second item in Figure 2, and the
fifth item in Figure 3 should be IAM
5. The S-CSCF connects the call request to the called user through the P-CSCF.
Tester
commented on
6. Bearer establishment.
What is the difference in the
resource occupation of VoLTE
voice AMR-NB AMR-WB?
Reply to @FLY_520 : No, AMR is
originally adaptive multi-rate coding. If
VoLTE uses a fixed rate, how is this
LTE user calls CS user
adaptation understood?
The process of initiating a call to a CS user by an LTE user accessing through an LTE
network is shown in Figure 3 .
Figure 3 LTE user calling CS user
z9763c
commented on
What is the difference in the
resource occupation of VoLTE
voice AMR-NB AMR-WB?
If it is VOLTE playing VOLTE, it should
be AMR-WB. If it is VOTE playing
GSM\TDS or CSFB users, will VOLTE
users also use the ARM-WB encoding
scheme or will they be adjusted and
updated?
 Recommended information
1. An LTE user initiates a call.
2. The MMTel AS performs calling service processing.
3. After completing the calling service processing, the MMTel AS routes the call back to
the S-CSCF; the S-CSCF queries the ENUM and routes the call to the called party.
4. The call is routed to the CS network through the MGCF.
5. Within the CS network, the call request is routed to the called user.
6. Bearer establishment.
7.
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motorolan
•
2018-03-01
The picture is wrong, it corresponds to the second item in Figure 2, and the fifth
item in Figure 3 should be IAM
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