Cisco ASR 5000 Series - Page 696

Serving GPRS Support Node (SGSN) Overview
▀ How the SGSN Works
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
Step
Description
2
The SGSN sends Delete PDP Context Request message to the GGSN containing the TEID.
The GGSN sends a Delete PDP Context Response back to the SGSN.
The SGSN stops generating S-CDR info at the end of the PDP context.
3
The SGSN sends a IMSI Detach Indication message to the MSC/VLR.
4
The SGSN sends a GPRS Detach Indication message to the MSC/VLR.
The SGSN stops generating M-CDR upon GPRS Detach.
5
If the detach is not due to a UE switch off, the SGSN sends a Detach Accept message to the UE.
6
Since the UE GPRS Detached, the SGSN releases the Packet Switched Signaling Connection.