Cisco Cisco ASR 5000
S4-SGSN Suspend-Resume Feature
How it Works ▀
SGSN Administration Guide, StarOS Release 18 ▄
Figure 83. Inter-SGSN Suspend and Resume Procedure with Peer S4-SGSN/MME
New Inter-SGSN Suspend and Resume Procedure from BSS to 2G Gn-SGSN
A new SGSN Suspend Request from the BSS to a 2G Gn-SGSN is shown in the following illustration.
The new SGSN RAU is the Resume procedure after the new SGSN Suspend procedure has been completed. The
Gn-SGSN sends an Update PDP Context Request to the GGSN which subsequently is sent to PGW to resume
all data transmissions on non-GBR bearers.
all data transmissions on non-GBR bearers.
When the S4-SGSN receives a Suspend Request from the BSS and if the subscriber is not attached to the 2G
SGSN and the peer is a Gn-SGSN, it sends a Context Request with Suspend header (GTPv1 Suspend Request)
to the peer Gn-SGSN.
to the peer Gn-SGSN.