Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
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Serving GPRS Support Node (SGSN) Overview
How the SGSN Works ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22937-01
Step
Description
5
If the MS/UE accepts the invitation to setup a PDP context, the MS/UE then begins the PDP context activation process
indicated in the preceding procedure.
indicated in the preceding procedure.
MS-Initiated Detach Procedure
This process is initiated by the MS/UE for a range of reasons and results in the MS/UE becoming inactive as far as the
network is concerned.
network is concerned.
Figure 189. MS-Initiated Combined GPRS/IMSI Detach
2
2
3
1
MS/UE
SGSN
GGSN
MSC/VLR
The following table provides details for the activity involved in each step noted in the diagram above.
Table 103. MS-Initiated Combined GPRS/IMSI Detach Procedure
Step
Description
1
The UE sends a Detach Request message to the SGSN containing the Detach Type, P-TMSI, P-TMSI Signature, and
Switch off indicator (i.e. if UE is detaching because of a power off).
Switch off indicator (i.e. if UE is detaching because of a power off).