Cisco ASR 5000 Series User Manual

Serving GPRS Support Node (SGSN) Overview
Network Deployments and Interfaces ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Up to 128 Peer RNCs per virtual SGSN. Up to 256 peers per physical chassis
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 and ATM (IPoA) interfaces
Facilitates SGSN Pooling
RAB (Radio Access Bearer) Assignment Request
RAB Release Request
Iu Release Procedure
SGSN-initiated Paging
Common ID
Security Mode Procedures
Initial MN Message
Direct Transfer
Reset Procedure
Error Indication
Gb: This is the SGSN‘s interface to the base station system (BSS) in a 2G radio access network (RAN). It
connects the SGSN via UDP/IP (via an Ethernet interface) or Frame Relay (via a Channelized SDH or SONET
interface). Gb-IP is the preferred interface as it improves control plane scaling as well as facilitates the
deployment of SGSN Pools.
Some of the procedures supported across this interface are:
BSS GSM at 900/1800/1900 MHz
BSS Edge
Frame Relay congestion handling
Traffic management per Frame Relay VC
NS load sharing
NS control procedures
BVC management procedures
Paging for circuit-switched services
Suspend/Resume
Flow control
Unacknowledged mode
Acknowledged mode
Gn/Gp: The Gn/Gp interfaces, comprised of GTP/UDP/IP-based protocol stacks, connect the SGSNs and
GGSNs to other SGSNs and GGSNs within the same PLMN (the Gn) or to GGSNs in other PLMNs (the Gp).
This implementation supports:

Cisco ASR 5000 Series Specifications

General

Brand	Cisco
Model	ASR 5000 Series
Category	Network Router
Language	English