Cisco ASR 5000 series Product Overview page 691

Serving GPRS Support Node (SGSN) Overview
Figure 169. imple First-Time GPRS Attach
MS/UE
This simple attach procedure can connect an MS via a BSS through the Gb interface (2.5G setup) or it can connect a UE
via a UTRAN through the Iu interface in a 3G network with the following process:
Table 87.
Step Description
1 The MS/UE sends an Attach Request message to the SGSN. Included in the message is information, such as:
Routing area and location area information
Mobile network identity
Attach type
OL-22938-02
4
First-Time GPRS Attach Procedure
SGSN
1
2 2
3a
3b
3c
3d
How the SGSN Works ▀
HLR
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