Content for  TS 23.316  Word version:  18.5.0

This clause specifies delta for Configuration Update procedure defined in clause 4.2.4 of TS 23.502 for 5G-RG and FN-RG.

The 5G-RG Configuration Update procedures via W-5GAN may be used by the network at any time to update 5G-RG configuration which includes:

• Access and Mobility Management related parameters decided and provided by the AMF. This includes the Configured NSSAI and its mapping to the Subscribed S-NSSAIs, the Allowed NSSAI and its mapping to Subscribed S-NSSAIs.
• 5G-RG Policy (i.e. URSP) provided by the PCF.

The procedure described in clause 4.2.4.2 of TS 23.502 is used for the AMF to change the 5G-RG configuration for access and mobility management related parameters, with the following differences:

• The UE is replaced by the 5G-RG.
• The (R)AN corresponds to the W-5GAN.

In Step 0, the AMF determines the necessity of 5G-RG configuration change due to various reasons, but UE mobility change is not applicable in this release of specification. If a 5G-RG is in CM-IDLE, the AMF can wait until the 5G-RG is in CM-CONNECTED state as Network Triggered Service Request is not applicable. In step 1, the AMF sends UE Configuration Update Command to the 5G-RG. The following parameters are not included: Mapping Of Allowed NSSAI, Configured NSSAI for the Serving PLMN or SNPN, Mapping Of Configured NSSAI, MICO, Operator-defined access category definitions, SMS Subscribed Indication. Step 2c is not applicable in this procedure. Step 3a is not applicable since it is only for NAS parameters that can be updated without transition from CM-IDLE are included, e.g. MICO mode.   The procedure for UE Configuration Update procedure for transparent UE Policy delivery described in clause 4.2.4.3 of TS 23.502 is used for the PCF to change or provide new 5G-RG policies in the 5G-RG, with the following differences:

• The UE is replaced by the 5G-RG.
• The (R)AN corresponds to the W-5GAN.
• The means for carrying NAS messages between 5G-RG and W-AGF within the W-GAN are to be defined by BBF.
• Step 2 is not applicable since the Network Triggered Service Request is not applicable in the case of W-5GAN.

The FN-RG related Configuration Update procedures via W-5GAN may be used by the network at any time to update FN-RG configuration in W-AGF which includes:

• Access and Mobility Management related parameters decided and provided by the AMF. This includes the Configured NSSAI and its mapping to the Subscribed S-NSSAIs, the Allowed NSSAI and its mapping to Subscribed S-NSSAIs.
• FN-RG related Policy (i.e. URSP) provided by the PCF.

The W-AGF acts as an N1 termination point on behalf of FN-RG. Therefore, the configuration update procedures described in clause 7.2.3.1, shown in Figure 7.2.3.1-1, apply to the FN-RG, with the following additional differences:

• The 5G-RG is replaced by the W-AGF which is acting as a UE towards the 5GC on behalf of the FN-RG.
• In step 1 the AMF sends the UE Configuration Update Command to the FN-RG, which is received by the W-AGF terminating the N1 and acting as a UE on behalf of the FN-RG. The W-AGF stores the UE Configuration as defined in clause 9.4. If requested by the AMF, the W-AGF shall acknowledge the UE Configuration Update Command.
• Step 2d is not applicable.
• When requested by the AMF, in step 4 the W-AGF starts the registration procedure described in clause 7.2.1.3.
• The Emergency service is not applicable.

  The procedure of UE Configuration Update procedure for transparent UE Policy delivery described in clause 4.2.4.3 of TS 23.502 is used by the PCF to change or provide new FN-RG policies in the W-AGF, with the following differences:

• The UE is replaced by the W-AGF which is acting as a UE towards the 5GC on behalf of the FN-RG.
• The (R)AN corresponds to the W-5GAN.
• The FN-RG is only registered over W-5GAN.
• Step 2 is not applicable since the Network Triggered Service Request is not applicable in the case of W-5GAN.
• In step 3, the W-AGF receives the delivery of UE policies on behalf of FN-RG.
• The FN-RG policies are managed by W-AGF as defined in clause 9.5.2.2.

How the W-5GAN applies the configuration update to the wireline network is to be defined by the BBF for the FN-BRG and by CableLabs for the FN-CRG. The operator may configure the W-AGF locally by provisioning means not specified by 3GPP as an alternative to the Configuration Update procedure for UE Policy delivery. The 3GPP Configuration Update will take precedence over a locally configured policy for FN-BRGs or FN-CRGs being serviced by the 5GC.