Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
Serving GPRS Support Node (SGSN) Overview
▀ Network Deployments and Interfaces
▄ Cisco ASR 5000 Series Product Overview
OL-22937-01
Network Deployments and Interfaces
The following logical connections maps indicate the SGSN‘s ability to connect to both 2G (GSM BSS) and 3G (UMTS
RAN) radio access networks, a mobile service center (MSC) and visitor location register (VLR), a home location
register (HLR), a charging gateway (CG - sometimes referred to as a charging gateway function (CGF)), a GTPP
storage server (GSS), a standalone GGSN, network devices in another PLMN, an SMS server center, and a standalone
SGSN.
RAN) radio access networks, a mobile service center (MSC) and visitor location register (VLR), a home location
register (HLR), a charging gateway (CG - sometimes referred to as a charging gateway function (CGF)), a GTPP
storage server (GSS), a standalone GGSN, network devices in another PLMN, an SMS server center, and a standalone
SGSN.
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 the ASR 5000 enables a single chassis to reduce hardware
requirements by supporting integrated co-location of a variety of the GPRS/UMTS services.
Configuration Options, the flexible architecture of the ASR 5000 enables a single chassis to reduce hardware
requirements by supporting integrated co-location of a variety of the GPRS/UMTS 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; or multiple instances of 3G SGSNs; or a combination of 2.5G and 3G SGSN to
comprise a dual access SGSN.
as multiple instances of 2.5G SGSNs; or multiple instances of 3G SGSNs; or a combination of 2.5G and 3G SGSN to
comprise a dual access SGSN.