Cisco Cisco ASR 5000
Serving GPRS Support Node (SGSN) Overview
Features and Functionality ▀
SGSN Administration Guide, StarOS Release 18 ▄
Default pre-emption vulnerability = not pre-emptable
MS Initiated Primary and Secondary Activation
The S4-SGSN supports default and dedicated bearer activation for:
Default and dedicated activation - secondary PDP procedure trigger from MS).
Lawful Intercept for activation rejects and failures
Dual stack PDP handling
APN-selection as per annex A.2/Spec 23.060 rel-9
Deactivation Procedure Support
The S4-SGSN supports the following deactivation procedures:
3G / 2G MS initiated bundle deactivation
3G / 2G MS initiated dedicated bearer deactivation
3G / 2G P-GW initiated dedicated bearer deactivation
3G / 2G P-GW initiated PDN deactivation
MS, PGW and HSS Initiated PDP Modification Procedure Support
The S4-SGSN supports the following packet data protocol (PDP) modification procedures:
2G and 3G MS initiated PDP modification procedures
2G and 3G P-GW Initiated PDP modification procedures
2G and 3G HSS initiated PDP modification procedures
The PDP context modification procedures are invoked by the network or by the MS to modify the parameters that were
negotiated under the following conditions:
negotiated under the following conditions:
During the PDP context activation procedure
During the secondary PDP context activation procedure
At a previously performed PDP context modification procedure
Depending on the selected Bearer Control Mode, the MS or the network may also create and delete a traffic flow
template (TFT) in an active PDP context. The procedure can be initiated by the network or the MS at any time when a
PDP context is active. Only the network may modify or delete a TFT packet filter that the network has created.
Conversely, only the MS may modify or delete a TFT packet filter that the MS has created.
template (TFT) in an active PDP context. The procedure can be initiated by the network or the MS at any time when a
PDP context is active. Only the network may modify or delete a TFT packet filter that the network has created.
Conversely, only the MS may modify or delete a TFT packet filter that the MS has created.
MS-Initiated PDP Context Modification
The Mobile Station (MS) initiated PDP context modification procedure MS allows for a change in negotiated QoS, the
radio priority level, or the TFT negotiated during the PDP context activation procedure.
radio priority level, or the TFT negotiated during the PDP context activation procedure.
E-UTRAN capable MSs will not modify the QoS of the first PDP context that was established within the PDN
connection.
connection.