Section: 4.11.0a.2a.10 UE Policy Container delivery via EPS
Content: This procedure is initiated when the PCF for the UE decides to update URSP and to provide to the UE via EPS. Based on UE Policy Association Modification initiated by the PCF for the UE in 4.11.0a.2a.6 and PCF initiated SM Policy Association Modification in 4.11.0a.2a.3, the updated URSP Rule included UE Policy Container is received by SMF+PGW-C. The SMF+PGW-C transfers the received UE Policy Container via ePCO to the UE by initiating the bearer modification without QoS update procedure as described in clause 5.4.3 of TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [13]. Figure 4.11.0a.2a.10-1: UE Policy Container delivery via EPS procedure 0. PCF for the UE decides to update UE policy. 1. The PCF for the UE creates the UE Policy Container including UE policy information, and sends the UE Policy Container in the Npcf_UEPolicyControl_UpdateNotify Request as described in step 3 of clause 4.11.0a.2a.6. If the PCF for the UE has not subscribed to be notified by the PCF for the PDU Session, the PCF for the UE subscribes to the PCF for the PDU Session to be notified about the UE response to an update of UE policy information by including "Result of UE Policy Container delivery via EPS" PCRT in this message. If the AF requested to PCF for the UE to report on the outcome of the UE Policies delivery as specified in clause 4.15.6.7, "Result of UE Policy Container delivery via EPS" PCRT shall be included in this message. 2. The PCF for the PDU Session sends a response to the PCF for the UE. 3. The PCF for the PDU Session initiates SM Policy Association Modification procedure as described in step 4 of clause 4.11.0a.2a.3. The PCF for the PDU Session transfers the UE Policy Container by Npcf_SMPolicyControl_UpdateNotify Request for the selected PDN connection for the related UE in EPC. If the PCF for the PDU Session received "Result of UE Policy Container delivery via EPS" PCRT in step 1, the PCF for the PDU Session subscribes to the SMF+PGW-C with "Result of UE Policy Container delivery via EPS" PCRT. 4. The SMF+PGW-C sends a response to the PCF for the PDU Session. 5. The SMF+PGW-C initiates the bearer modification without bearer QoS update procedure, as described in clause 5.4.3 of TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [3]. The UE includes the result of UE Policy delivery in response via ePCO. NOTE: The ePCO container for UE Policy delivery response is specified by Stage 3. 6. The SMF+PGW-C transparently forwards the response of the UE to the PCF for the PDU Session by using Npcf_SMPolicyControl_Update Request. The message includes the indication that "Result of UE Policy Container delivery via EPS" PCRT was met. If the SMF+PGW-C received rejection (e.g. due to paging failure) from Update Bearer Request message in step 5, then the SMF+PGW-C sends the delivery failure result with an appropriate reason (e.g. such that UE is temporarily not reachable) and the indication of "Result of UE Policy Container delivery via EPS" PCRT was met to the PCF for the PDU Session. 7. The PCF for the PDU Session transparently forwards the response from the UE, or the delivery failure result provided by SMF+PGW-C to the PCF for the UE by using Npcf_UEPolicyControl_Update Request. The message includes the indication of "Result of UE Policy Container delivery via EPS" PCRT was met. If the AF requested to PCF for the UE to report on the outcome of the UE Policies delivery as specified in clause 4.15.6.7, the PCF for the UE reports the outcome of the UE Policies delivery to the AF with the received result from the PCF for the PDU Session. 8. The PCF for the UE sends a response to the PCF for the PDU Session. 9. The PCF for the PDU Session sends a response to the SMF+PGW-C.