Serving GPRS Support Node (SGSN) Overview
Features and Functionality - Enhanced and Licensed â–€
Cisco ASR 5000 Series Product Overview â–„
Features and Functionality - Enhanced and Licensed
Enhanced features add or expand the capabitilies of the SGSN beyond basic levels of operation. All of these features
comply with relevant 3GPP specifications. All of these features require the purchase of an additional license to
implement the functionality on the SGSN.
The following is an alphabetical list of the enhanced features:
Direct Tunnel
Lawful Intercept
QoS Traffic Policing per Subscriber
Session Recovery
SGSN Pooling and Iu-Flex Gb-Flex
Short Message Service (SMS over Gd)
Direct Tunnel
In accordance with standards, one tunnel functionality enables the SGSN to establish a direct tunnel at the user plane
level - a GTP-U tunnel, directly between the RAN and the GGSN.