Cisco ASR 5000 series Product Overview page 664

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Table of Contents

▀ Network Deployments and Interfaces

As well, the SGSN can support the following IEs from later version standards:

Gr: This is the interface to the HLR. It supports SIGTRAN (M3UA/SCTP/IP) over Ethernet.

Some of the procedures supported by the SGSN on this interface are:

Ga: The SGSN uses the Ga interface with GTP Prime (GTPP) to communicate with the charging gateway (CG,

also known as CGF) and/or the GTPP Storage Server (GSS). The interface transport layer is typically UDP

over IP but can be configured as TCP over IP for:

The charging gateway handles buffering and pre-processing of billing records and the GSS provides storage for

Charging Data Records (CDRs). For additional information regarding SGSN charging, refer to the Charging

Gd: This is the interface between the SGSN and the SMS Gateway (SMS-GMSC / SMS-IWMSC) for both 2G

and 3G technologies through multiple interface mediums. Implementation of the Gd interface requires

purchase of an additional license.

▄ Cisco ASR 5000 Series Product Overview

GTPv0 and GTPv1, with the capability to auto-negotiate the version to be used with any particular peer

GTP-C (control plane) and GTP-U (user plane)

Transport over ATM/STM-1Optical, Fast Ethernet, and Ethernet 1000 line cards/QGLCs)

One or more Gn/Gp interfaces configured per system context

User Location Information

Send Authentication Info

Update Location

Insert Subscriber Data

Delete Subscriber Data

Cancel Location

Ready for SM Notification

SIGTRAN based interfaces M3UA/SCTP

Peer connectivity can be through an intermediate SGP or directly depending on whether the peer (HLR,

EIR, SMSC, GMLC) is SIGTRAN enabled or not

SCTP Multi-Homing supported to facilitate network resiliency

M3UA operates in ASP & IPSP client/server and single/double-ended modes

Multiple load shared M3UA ASP instances for high-performance and redundancy

Works over Ethernet (IPoA) interface

One or more Ga interfaces per system context, and

An interface over Ethernet 10/100 or Ethernet 1000 interfaces

Serving GPRS Support Node (SGSN) Overview