Ms-Initiated Detach Procedure - Cisco ASR 5000 series Product Overview

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Serving GPRS Support Node (SGSN) Overview

The SGSN determines the MS/UE's location and sets up a NAS connection with the MS/UE. The SGSN then sends a

Request PDP Context Activation message to the MS/UE.

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.

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.

Figure 172. MS-Initiated Combined GPRS/IMSI Detach

The following table provides details for the activity involved in each step noted in the diagram above.

Table 90. MS-Initiated Combined GPRS/IMSI Detach Procedure

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).

How the SGSN Works ▀

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