Cisco Cisco ASR 5000
Direct Tunnelling for the S4-SGSN
▀ How It Works
▄ SGSN Administration Guide, StarOS Release 18
Figure 37. New SRNS with S-GW Change with Data Transfer
The table below includes detailed behaviors for New SRNS scenarios.
New SRNS with S-GW Change and Indirect Data Transfer
Indirect Data Transfer (IDFT) during a new SGSN SRNS happens during E-UTRAN-to-UTRAN connected mode
IRAT handover. See the figure below for a detailed call flow.
IRAT handover. See the figure below for a detailed call flow.