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Content for  TS 23.214  Word version:  18.0.0

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6.3.4.2.2 Procedures with SGSN terminating Gn/Gp interface 
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6.3.4.2.2  Procedures with SGSN terminating Gn/Gp interface  p. 76
This clause defines interactions between the CP and UP function during the following procedures related to the modification of a PDN connection.
Group 1 Procedures for Location Management, Handover, Service Request and Inter-System Change:
  • Inter SGSN Routeing Area Update Procedure.
  • Combined RA / LA Update in the Case of Inter SGSN RA Update Procedure.
  • Iu mode RA Update Procedure.
  • SRNS Relocation Procedure.
  • Combined Hard Handover and SRNS Relocation Procedure.
  • Combined Cell / URA Update and SRNS Relocation Procedure.
  • Enhanced Serving RNS Relocation.
  • MS Initiated Service Request Procedure.
  • Network Initiated Service Request Procedure.
  • Iu mode to A/Gb mode Intra SGSN Change.
  • A/Gb mode to Iu mode Intra SGSN Change.
  • Iu mode to A/Gb mode Inter-SGSN Change.
  • A/Gb mode to Iu mode Inter SGSN Change.
  • GPRS Paging Procedure (A/Gb mode).
Group 2 UE/SGSN initiated PDN connection modification:
  • Secondary PDP Context Activation Procedure for A/Gb mode.
  • Secondary PDP Context Activation Procedure for Iu mode.
  • SGSN-Initiated PDP Context Modification Procedure, A/Gb mode.
  • SGSN-Initiated PDP Context Modification Procedure, Iu mode.
  • MS-Initiated PDP Context Modification Procedure, A/Gb mode.
  • MS-Initiated PDP Context Modification Procedure, Iu mode.
  • MS Initiated PDP Context Deactivation Procedure for A/Gb mode (without Teardown Ind).
  • MS Initiated PDP Context Deactivation Procedure for Iu mode (without Teardown Ind).
  • SGSN-initiated PDP Context Deactivation Procedure (without Teardown Ind).
Group 3 PGW initiated PDN connection modification:
  • Network Requested Secondary PDP Context Activation Procedure using Gn
  • GGSN-Initiated PDP Context Modification Procedure for A/Gb mode
  • GGSN-Initiated PDP Context Modification Procedure for Iu mode
  • GGSN-initiated PDP Context Deactivation Procedure
During the above procedures, following is the nature of interactions between the CP and UP function:
  • The PGW-C informs the PGW-U to modify the Sx session.
Copy of original 3GPP image for 3GPP TS 23.214, Fig. 6.3.4.2.2-1: Interaction between CP and UP function with PDN connection modification, Group 1
Figure 6.3.4.2.2-1: Interaction between CP and UP function with PDN connection modification, Group 1
(⇒ copy of original 3GPP image)
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Step 1.
Procedure as listed in this step is initiated as specified in the relevant clauses of this specification. The relevant steps of the procedure as specified in the Figure above are executed.
Step 2a.
The PGW-C may send an Sx Session Modification Request to the PGW-U to update the Sx session.
Step 2b.
The PGW-U sends an Sx Session Modification Response to the PGW-C confirming the update the Sx session.
Step 3.
The relevant steps of the procedure as specified in the Figure above are executed.
Copy of original 3GPP image for 3GPP TS 23.214, Fig. 6.3.4.2.2-2: Interaction between CP and UP function with PDN connection modification, Group 2
Figure 6.3.4.2.2-2: Interaction between CP and UP function with PDN connection modification, Group 2
(⇒ copy of original 3GPP image)
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Step 1.
Procedure as listed in this step is initiated as specified in the relevant clauses of this specification. The relevant steps of the procedure as specified in the Figure above are executed.
Step 2a.
The PGW-C may send an Sx Session Modification Request to the PGW-U to update the Sx session. For "Secondary PDP Context Activation Procedure", PGW-C requests PGW-U to allocate F-TEID for the dedicated bearer. For "MS- and SGSN- Initiated PDP Context Deactivation Procedure", the PGW-C shall request PGW-U to remove the PDR for the affected bearers.
Step 2b.
The PGW-U sends an Sx Session Modification Response to the PGW-C confirming the update the Sx session.
Step 3.
The relevant steps of the procedure as specified in the Figure above are executed.
Step 4a.
The PGW-C may send an Sx Session Modification Request to the PGW-U to update the Sx session.
Step 4b.
The PGW-U sends an Sx Session Modification Response to the PGW-C confirming the update the Sx session.
Step 5.
The relevant steps of the procedure as specified in the Figure above are executed.
Copy of original 3GPP image for 3GPP TS 23.214, Fig. 6.3.4.2.2-3: Interaction between CP and UP function with PDN connection modification, Group 3
Figure 6.3.4.2.2-3: Interaction between CP and UP function with PDN connection modification, Group 3
(⇒ copy of original 3GPP image)
Up
Step 1.
Procedure as listed in this step is initiated as specified in the relevant clauses of this specification. The relevant steps of the procedure as specified in the Figure above are executed.
Step 2a.
The PGW-C may send an Sx Session Modification Request to the PGW-U to update the Sx session. For "GGSN Initiated PDP Context Deactivation Procedure", PGW-C shall request PGW-U to stop counting and stop forwarding packets for the affected bearers.
Step 2b.
The PGW-U sends an Sx Session Modification Response to the PGW-C confirming the update the Sx session.
Step 3.
The relevant steps of the procedure as specified in the Figure above are executed.
Step 4a.
The PGW-C may send an Sx Session Modification Request to the PGW-U to update the Sx session. For "Network Requested Secondary PDP Context Activation Procedure", the PGW-C shall include the F-TEIDu of the activated bearer received from the GnSGSN. For "GGSN Initiated PDP Context Deactivation Procedure", the PGW-C shall request PGW-U to remove the PDR for the affected bearers.
Step 4b.
The PGW-U sends an Sx Session Modification Response to the PGW-C confirming the update the Sx session.
Step 5.
The relevant steps of the procedure as specified in the Figure above are executed.
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