Cisco Cisco ASR 5000
S4-SGSN Suspend-Resume Feature
How it Works ▀
SGSN Administration Guide, StarOS Release 18 ▄
Intra-SGSN Inter-System Suspend and Resume Procedure
The intra-SGSN Inter-System Suspend and Resume procedure is shown in the following illustration. In this case, the
BSS sends a Suspend Request to the 2G part of the SGSN. The 2G SGSN will internally send the request to the 3G S4-
SGSN where the PDPs are anchored. The PDP contexts are then suspended by 3G S4-SGSN as shown in the diagram.
BSS sends a Suspend Request to the 2G part of the SGSN. The 2G SGSN will internally send the request to the 3G S4-
SGSN where the PDPs are anchored. The PDP contexts are then suspended by 3G S4-SGSN as shown in the diagram.
The RAU is the Resume procedure after the 2G-3G Inter-System Intra-SGSN Suspend procedure is completed. The
SGSN sends a Create Session Request / Modify Bearer Request / Resume Notification to the SGW which subsequently
is sent to PGW to resume all data transmissions on non-GBR bearers.
SGSN sends a Create Session Request / Modify Bearer Request / Resume Notification to the SGW which subsequently
is sent to PGW to resume all data transmissions on non-GBR bearers.
Figure 87. Intra-SGSN Inter-System Suspend and Resume Procedure
Inter-SGSN Inter-System Suspend and Resume Procedure
The inter-SGSN inter-system Suspend and Resume procedure is shown in the following illustration. This describes the
scenario when the suspend message is received in an SGSN that is different from the SGSN currently handling the
packet data transmission and would be valid for at least the following cases:
scenario when the suspend message is received in an SGSN that is different from the SGSN currently handling the
packet data transmission and would be valid for at least the following cases: