Cisco Cisco ASR 5000
Direct Tunnelling for the S4-SGSN
How It Works ▀
SGSN Administration Guide, StarOS Release 18 ▄
Figure 39. Old SRNS with Direct Data Transfer
The table below includes detailed behaviors for Old SRNS.
Old SRNS with Indirect Data Transfer
Indirect Data Transfer (IDFT) during Old SGSN SRNS happens during UTRAN-to-E-UTRAN connected mode IRAT
handover. A Forward Relocation Request is sent with SGW S12U FTEID.
handover. A Forward Relocation Request is sent with SGW S12U FTEID.