Cisco Cisco ASR 5000
Serving GPRS Support Node (SGSN) Overview
▀ Network Deployments and Interfaces
▄ SGSN Administration Guide, StarOS Release 18
Network Deployments and Interfaces
The following logical connection maps illustrate the SGSN’s ability to connect to various radio access network types,
core network types, and network components:
core network types, and network components:
GSM edge radio access network (GERAN) provides access to the 2.5G general packet radio service (GPRS)
network
UMTS terrestrial radio access network (UTRAN) provides access to the 3G universal mobile
telecommunications system (UMTS) network
evolved UTRAN (E-UTRAN) provides access to the 4G mobile evolved packet core (EPC) of the long term
evolution/system architecture evolution (LTE/SAE) network
another SGSN
standalone gateway GPRS support node (GGSN)
co-located P-GW/GGSN
mobile service center (MSC)
visitor location register (VLR)
home location register (HLR)
charging gateway (CF - sometimes referred to as a charging gateway function (CGF))
GTPP storage server (GSS)
equipment identity registry (EIR)
home subscriber server (HSS)
mobility management entity (MME)
serving gateway (S-GW)
CAMEL service’s GSM service control function (gsmSCF)
short message service server center (SMS-C)
network devices in another PLMN
SGSN and Dual Access SGSN Deployments
SGSNs and GGSNs work in conjunction within the GPRS/UMTS network. As indicated earlier in the section on System
Configuration Options, the flexible architecture of StarOS enables a single chassis to reduce hardware requirements by
supporting integrated co-location of a variety of the SGSN services.
Configuration Options, the flexible architecture of StarOS enables a single chassis to reduce hardware requirements by
supporting integrated co-location of a variety of the SGSN services.
A chassis can be devoted solely to SGSN services or the SGSN system can include any co-location combination, such
as multiple instances of 2.5G SGSNs (configured as GPRS services); or multiple instances of 3G SGSNs (configured as
SGSN services); or a combination of 2.5G and 3G SGSN to comprise a dual access SGSN.
as multiple instances of 2.5G SGSNs (configured as GPRS services); or multiple instances of 3G SGSNs (configured as
SGSN services); or a combination of 2.5G and 3G SGSN to comprise a dual access SGSN.
Important:
The following illustrates the GPRS/UMTS Dual Access architecture with a display of all the
interfaces supported as of Release 14.0. The SGSN Logical Network Interfaces section below lists the interfaces
available for the release applicable to the version of this manual.
available for the release applicable to the version of this manual.