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Content for  TS 23.214  Word version:  18.0.0

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6.3.4.3 Procedures with PDN connection establishment 
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6.3.4.3  Procedures with PDN connection establishment  p. 80

This clause defines interactions between the CP and UP function during the following procedures related to the establishment of a PDN connection:
  • IPv6 Stateless Address Autoconfiguration Procedure.
  • PDP Context Activation Procedure for A/Gb mode.
  • PDP Context Activation Procedure for Iu mode.
During the procedures involving S4 listed above, following is the nature of interactions between the CP and UP function:
  • The SGW-C informs the SGW-U to create the Sx session.
  • The PGW-C informs the PGW-U to create the Sx session.
  • The SGW-C informs the SGW-U to modify the Sx session.
  • The PGW-C informs the PGW-U to modify the Sx session.
Copy of original 3GPP image for 3GPP TS 23.214, Fig. 6.3.4.3-1: Interaction between CP and UP function with PDN connection establishment
Figure 6.3.4.3-1: Interaction between CP and UP function with PDN connection establishment
(⇒ 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. Steps in Figure 64a are specific for S4 SGSN.
For the case that Gn/Gp SGSN interconnects with PGW-C, steps 2a/2b or 5a/5b are skipped.
Step 2a.
The SGW-C sends an Sx Session Establishment Request to the SGW-U to create the Sx session.
Step 2b.
The SGW-U sends an Sx Session Modification Response to the SGW-C confirming the Sx session creation.
Step 3a.
The PGW-C sends an Sx Session Establishment Request to the PGW-U to create the Sx session.
Step 3b.
The PGW-U sends an Sx Session Establishment Response to the PGW-C confirming the Sx session creation.
Step 4.
The relevant steps of the procedure as specified in the Figure above are executed. Steps in Figure 64b are specific for S4 SGSN.
Step 5a.
The SGW-C may send an Sx Session Modification Request to the SGW-U to update the Sx session.
Step 5b.
The SGW-U sends an Sx Session Modification Response to the SGW-C confirming the Sx session update.
Step 6a.
The PGW-C may send an Sx Session Modification Request to the PGW-U to update the Sx session.
Step 6b.
The PGW-U sends an Sx Session Modification Response to the PGW-C confirming the Sx session update.
Step 7.
The relevant steps of the procedure as specified in the Figure above are executed.
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