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Session Control Manager Overview
▀ Network Deployments and Interfaces
▄ Cisco ASR 5000 Series Session Control Manager Administration Guide
OL-22952-01
SCM in a GSM/UMTS Data Network Deployment
CSCF / A-BG / GGSN Deployment
The SCM is designed to function within a UMTS GGSN network. As shown in following figure, the SCM supports a
number of interfaces used to communicate with other components in an IMS environment and supports the interface
used to bridge the GGSN network.
number of interfaces used to communicate with other components in an IMS environment and supports the interface
used to bridge the GGSN network.
Figure 5.
GSM/UMTS CSCF/A-BG/GGSN SCM Deployment Example
C S C F s
L R F
P C R F
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/
A -B G / G G S N
M w
G m
U M T S A cc e s s N e tw o rk
D x
(S / I-C S C F )
S h
(S -C S C F )
(S -C S C F )
H S S
C
(
(
)
x
S / I-C S C F
R x (P -C S C F / A -B G )
O F C S
R f
M I
(E -C S C F )
(E -C S C F )
Logical Network Interfaces (Reference Points)
Interfaces, used to support IMS in a UMTS network, can be defined within two categories: SIP and DIAMETER. The
SCM incorporates standards-based interfaces for both SIP and DIAMETER network architectures.
SCM incorporates standards-based interfaces for both SIP and DIAMETER network architectures.
SIP Interfaces
The following table provides descriptions of SIP interfaces supported by the SCM in a GSM/UMTS network
deployment.
deployment.
Table 4. SIP Interfaces in a GSM/UMTS Network
Interface
Description
Gm
The reference point between the P-CSCF and the User Equipment (UE).
The Gm interface provides SIP signaling between the GGSN and the P-CSCF.
The Gm interface provides SIP signaling between the GGSN and the P-CSCF.