Serving GPRS Support Node (SGSN) Overview
Network Deployments and Interfaces â–€
Cisco ASR 5000 Series Product Overview â–„
Figure 161. Dual Access 2.5G/3G SGSNs
IP-based GPR/UMTS Public Land Mobile Network (PLMN)
UTRAN
Node-B
RNC
BTS
PCU
BSC
BSS
A-bis
UE
UE
Gb
Gp
IuPS
Gs
SGSN
Gn
Gr
Gn
GGSN
PDN
Gi
Gf
Ga
Gd
2.5G
&/or
3G
SGSN
UDP
GGSN
in different
PLMN
SGSN/GGSN Deployments
The co-location of the SGSN and the GGSN in the same chassis facilitates handover. Again, it can be any type of
SGSN, 2.5G or 3G, with the GGSN.