TS 23.316 – Wireless and wireline convergence access support

1 Scope

The present document defines the enhancements to Stage 2 system architecture, procedure and flows, Policy and Charging Control for the 5G System defined in TS 23.501 [2], TS 23.502 [3] and TS 23.503 [4] in order to support wireline access network and Fixed Wireless Access. The specifications defined in TS 23.501 [2], TS 23.502 [3] and TS 23.503 [4] apply to the wireline access network and Fixed Wireless Access.

4 High level features

This clause specifies high level description equivalent to TS 23.501 [2].

4.1 General

The roaming support for W-5GAN access is not specified in this release.

The usage of Trusted or Untrusted access to 5GC by a 5G-RG or by a FN RG is not applicable.

4.2 Network Access Control

4.2.0 General

This clause specifies the delta related to network access control defined in TS 23.501 [2] clause 5.2.

4.2.1 Network selection

In the case of 5G-RG or FN-RG connected via W-5GAN the PLMN selection specification defined in TS 22.011 [25] and in TS 23.122 [26] and the SNPN selection specification defined in TS 24.502 [44] is not applicable. The HPLMN is implicitly selected by wired physical connectivity between 5G-RG or FN-RG and W-AGF.

NOTE 1: The 5G-RG or FN-RG can only connect to a single physical wired access W-5GAN to a W-AGF configured at line provisioning by the operator, in addition no PLMN information is advertised by AS protocols in W-5GAN, since the Network selection feature is not supported.

The roaming scenario is not supported in this Release of the specification.

In the case of 5G-RG connected via FWA TS 23.501 [2] clause 5.2.2 applies with the following difference:

- The PLMN selection defined in TS 22.011 [25] and in TS 23.122 [26] applies with the UE replaced by 5G-RG.

4.2.2 Identification and authentication

In the case of 5G-RG connected via W-5GAN or FWA, the specification defined in TS 23.501 [2] clause 5.2.3 applies with the following difference:

- UE is replaced by 5G-RG.

In the case of FN-RG connected via W-5GAN, the specification defined in TS 23.501 [2] clause 5.2.3 applies with the following differences:

- UE is replaced by FN-RG.

- The W-AGF provides the NAS signalling connection to the 5GC on behalf of the FN-RG.

- The W-5GAN may authenticate the FN-BRG per BBF specification BBF TR-456 [9] and WT-457 [10]. The W-5GAN may authenticate the FN-CRG per CableLabs DOCSIS MULPI [8].

4.2.3 Authorisation

In the case of 5G-RG connected via W-5GAN or FWA, the specification defined in TS 23.501 [2] clause 5.2.4 applies with the following differences:

- UE is replaced by 5G-RG.

In the case of FN-RG connected via W-5GAN, the specification defined in TS 23.501 [2] clause 5.2.4 applies with the following differences:

- UE is replaced by FN-RG.

- W-AGF performs the UE Registration procedure on behalf of the FN-RG.

4.2.4 Access control and barring

In the case of 5G-RG or FN-RG connected via W-5GAN the Access Control and Barring defined in TS 23.501 [2] clause 5.2.5 is not applicable.

In the case of 5G-RG connected via FWA the specification defined in TS 23.501 [2] clause 5.2.5 applies with the following difference:

- UE is replaced by 5G-RG.

4.2.5 Policy control

Policy control is specified in clause 9.

4.2.6 Lawful Interception

In the case of 5G-RG connected via FWA the specification defined in TS 23.501 [2] clause 5.2.7 applies with the following difference:

- UE is replaced by 5G-RG.

In the case of 5G-RG connected via W-5GAN, the definition and functionality of Lawful Interception defined in TS 33.126 [32] applies with the following difference:

- UE is replaced by 5G-RG.

In the case of FN-RG connected via W-5GAN, the definition and functionality of Lawful Interception defined in TS 33.126 [32] applies with the following difference:

- UE is replaced by FN-RG, with e.g. the difference that FN-RG may not have a globally unique PEI (as described in clause 4.7.7) and does not hold any 3GPP-based subscriber credentials or subscriber identity information.

4.3 Registration and Connection Management

4.3.1 Registration management

Registration management when 5G-RG or FN-RG is connected to 5GC via wireline access is described in TS 23.501 [2] clause 5.5.1.

Registration management when 5G-RG is connected to 5GC via NG RAN access is described…