Cisco Cisco Packet Data Gateway (PDG)
SaMOG Gateway Overview
▀ How the SaMOG Gateway Works
▄ SaMOG Administration Guide, StarOS Release 19
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Figure 12. SaMOG Gateway Data Flow
Table 13.
SaMOG Gateway Data Flow
Step
Description
1.
The UE sends the uplink (UL) data to the WLC.
2.
The WLC sends the user data to the SaMOG Gateway’s CGW service over the established bi-directional GRE tunnel.
3.
The CGW service sends the user data over a GTPU tunnel to the P-GW.
4.
The P-GW maps the downlink (DL) data on the GTPU tunnel to a GRE tunnel to the WLC.
5.
The CGW service sends the user data to the WLC over the GRE tunnel.
6.
The WLC sends the user data to the UE.