Serving GPRS Support Node (SGSN) Overview
▀ Network Deployments and Interfaces
▄ Cisco ASR 5000 Series Product Overview
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.
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.
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.
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