C.2 Npcf_SMPolicyControl Service

29.5123GPP5G SystemRelease 18Session Management Policy Control ServiceStage 3TS

C.2.1 Service Description

C.2.1.1 Overview

Clause 4.1.1 applies with the exception that the UE is replaced by the 5G-RG and the W-AGF, which is acting as a UE towards the 5GC on behalf of the FN-RG.

C.2.1.2 Service Architecture

Clause 4.1.2 applies with the exception that roaming functionality does not apply for session policy control in this Release of the specification for 5G-RG users connecting to the 5GC via W-5GAN and FN-RG users. Roaming architecture is only applicable to a 5G-RG connecting to the 5GC via NG RAN.

The 5G-RG may support LTE access connected to EPC and EPC interworking as defined in Annex B.

C.2.1.3 Network Functions

C.2.1.3.1 Policy Control Function (PCF)

The PCF functionality defined in clause 4.1.3.1 shall apply with the exceptions described in this Annex.

C.2.1.3.2 NF Service Consumers

The functionality defined in clause 4.1.3.2 shall apply.

The enforcement of the policy decisions applies for a single access PDU session over wireline access and multiaccess PDU sessions over wireline access and 3GPP with the exceptions described in this Annex.

C.2.1.4 Rules

C.2.1.4.1 PCC Rules

Functionality as described in clause 4.1.4.2 applies with the following exceptions for the traffic of a PDU session over wireline access:

– UL/DL Maximum Packet Loss Rate information does not apply.

– QoS Notification Control Information does not apply.

C.2.1.5 Policy control request trigger

The Policy Control Request Triggers defined in clause 5.6.3.6 and related procedures are supported for a 5G-RG connecting to the 5GC via NG-RAN.

The Policy Control Request Triggers defined in clause 5.6.3.6 are supported for a 5G-RG or FN-RG connecting to the 5GC via W-5GAN with the following not supporting ones:

– PLMN_CH

– SAREA_CH

– SCNN_CH

– PRA_CH

– PS_DA_OFF

– QOS_NOTIF

– RES_RELEASE

– UE_STATUS_RESUME

– TSN_BRIDGE_INFO

– QOS_MONITORING

– SCELL_CH

– EPS_FALLBACK

– DDN_FAILURE

– DDN_DELIVERY_STATUS

– USER_LOCATION_CH

Consequently, the procedures related to above policy control request triggers are not supported in the corresponding service operations.

The PS_DA_OFF Policy Control Request Trigger may apply for the 5G-RG connecting to the 5GC via W-5GAN (see clause 4.2.2.8 and 4.2.4.8) in an hybrid access scenario (see clause C.3.6.2).

The RES_MO_RE Policy Control Request trigger is not supported for a FN-RG as described in BBF TR-456 [47] and CableLabs WR-TR-5WWC-ARCH [48] specification.