Cisco Cisco ASR 5000
Direct Tunnelling for the S4-SGSN
▀ How It Works
▄ SGSN Administration Guide, StarOS Release 18
Figure 36. Intra SRNS without S-GW Change
The table below includes detailed behaviors for intra SRNS scenarios.
Table 16.
Intra SRNS Behaviors
Old RNC DT
Status
Status
New RNC
DT Status
DT Status
S-GW
Relocation
Relocation
Behavior
Supported
Supported
No
Relocation Request to Target RNC is sent with S-GW S12 U FTEID. Modify Bearer
Request to S-GW is sent with RNC S12 U FTEID.
Request to S-GW is sent with RNC S12 U FTEID.
Supported
Not
Supported
Supported
No
Relocation Request to Target RNC is sent with SGSN S4 U FTEID. Modify Bearer
Request to S-GW is sent with SGSN S4 U FTEID
Request to S-GW is sent with SGSN S4 U FTEID
Not
Supported
Supported
Supported
No
Relocation Request to Target RNC is sent with S-GW S12U FTEID. Modify Bearer
Request to S-GW is sent with RNC S12 U FTEID.
Request to S-GW is sent with RNC S12 U FTEID.