Content for  TS 23.316  Word version:  18.5.0

As described in TS 23.501, each subscriber in the 5G System shall be allocated one 5G Subscription Permanent Identifier (SUPI) for use within the 3GPP system. As described in TS 23.501, each FN-RG or 5G-RG accessing the 5G System shall be assigned a Permanent Equipment Identifier (PEI). The clauses below describe specific aspects for supporting 5G-RG and FN-RG.

For PLMNs, the SUPI for a 5G-BRG shall contain an IMSI, as described in clause 5.9.2 of TS 23.501. The SUPI for accessing SNPN is defined in clause 4.16.1. The SUCI provided by the 5G-BRG to the network contains the concealed SUPI, as described in TS 33.501.

The SUPI for an FN-BRG subscription shall, based on operator configuration, either contain an IMSI or a GLI as defined in clause 4.7.8. A SUPI containing a GLI takes the form of a NAI whose user part is the GLI and whose realm part is an identifier of the operator owning the subscription. The SUCI provided by the W-AGF to the 5GC for FN-BRG always corresponds to a SUPI containing a GLI. This SUCI acts as pseudonym of the SUPI and the UDM performs a mapping to the actual SUPI that, depending on operator configuration, contains either an IMSI or the same GLI that was provided in the SUCI. As described in TS 23.003, the SUCI also contains an identifier of the Home network, i.e. the identifier of the operator owning the subscription.

The SUPI for a FN-CRG subscription shall, based on operator configuration, contain either an IMSI, as described in clause 5.9.2 of TS 23.501, or a GCI (Global Cable identifier defined in clause 4.7.9). The SUPI for a 5G-CRG subscription shall, based on operator configuration, contain either an IMSI, as described in clause 5.9.2 of TS 23.501, or a GCI (Global Cable identifier defined in clause 4.7.9). For PLMNs, only 5G-CRG whose SUPI corresponds to an IMSI may use 3GPP access to connect to 5GC. The SUPI for accessing SNPN is defined in clause 4.16.1. A SUPI containing a GCI takes the form of a NAI where the user part is the GCI and the realm part is an identifier of the operator managing the subscription. The SUCI provided by the 5G-CRG to the network contains the concealed SUPI, as described in TS 33.501. The SUCI provided to the network for FN-CRG support always corresponds to a SUPI containing a GCI. This SUCI acts as pseudonym of the SUPI and the UDM performs a mapping to the SUPI that, depending on operator configuration, contains either an IMSI or the same GCI than in the SUCI. As described in TS 23.003, for both cases where the SUCI contains an IMSI or contains a GCI, the SUCI contains an identifier of the Home network i.e. an identifier of the operator managing the subscription.

The Line ID is defined in BBF Specifications, see BBF TR-470 [38].

The HFC_Identifier may contain a cable modem MAC address or an overall HFC account identifier, as defined by CableLabs in DOCSIS MULPI [8].

If the 5G-RG (i.e. 5G-BRG and 5G-CRG) supports at least one 3GPP access technology (i.e. NG-RAN, E-UTRAN), the 5G-RG must be allocated a Permanent Equipment Identifier (PEI) in the IMEI or IMEISV format, as described in TS 23.501. The 5G-RG shall present this PEI to the network independent of access technology used by the 5G-RG (3GPP access technology or W-5GAN access technology). If the 5G-BRG supports only W-5GAN access, the PEI shall contain the 5G-BRG MAC address. If the 5G-CRG supports only W-5GAN access, the PEI shall contain the cable modem MAC address. For FN-RG (i.e. FN-BRG and FN-CRG), the W-AGF shall provide a PEI containing:

• The FN-RG MAC address: this shall be used by the W-AGF when it is known by configuration that the MAC address received by the W-AGF is unique (no other entity can use the same MAC address) and corresponds to the permanent MAC address configured on the RG by the manufacturer.
• The MAC address received by the W-AGF, together with an indication provided by the W-AGF that this address cannot be used as an Equipment identifier of the FN-RG: this shall be used by the W-AGF when the conditions to provide a PEI containing the FN-RG MAC address are not met.

For usage with 5GC, a Global Line Identifier (GLI) is specified in order to define a globally unique identifier of the line connecting the RG to the network. In this release an RG is associated with a unique GLI. For FN BRG, the GLI is used to build a SUCI. For FN-BRG the GLI may be used to build a SUPI. See clause 4.7.3. For all types of RG, the GLI is used as User Location Information on wireline access. The GLI contains an identifier of the Line ID source and the Line ID value. The identifier of the Line ID source ensures the unicity of the GLI while the Line ID may not be unique in some deployments. The identifier of the Line ID source and Line ID are administered by the W-AGF operator. The Global Line Identifier is a variable length identifier encoded as defined in TS 23.003 and in BBF TR-470 [38].

For usage with 5GC, a Global Cable Identifier (GCI) is specified in order to define a globally unique identifier of the line connecting the CRG to the network. In this release an RG is associated with a unique GCI. The GCI contains the HFC_Identifier which is defined in CableLabs WR-TR-5WWC-ARCH [27]. For FN CRG, the GCI is used to build a SUCI. For FN CRG the GCI may be used to build a SUPI. See clause 4.7.4. For all types of CRG the HFC Node ID is used to build User Location Information on Cable access. The identifier of the HFC Node ID and the HFC_Identifier are administered by the W-AGF operator. The Global Cable Identifier is a variable length identifier encoded as defined in TS 23.003 and CableLabs WR-TR-5WWC-ARCH [27].

The AMF, as described in clause 5.3.2.3 of TS 23.501, determines the RAT Type for Wireline access, taking into account the Global W-AGF Node ID and possibly ULI information provided by the W-AGF. The RAT Type may allow to distinguish between Wireline, Wireline-Cable access andWireline-BBF access.

The SUPI for non-5G capable (N5GC) device or AUN3 device connecting via CRG shall contain a network-specific identifier. A SUPI containing a network-specific identifier takes the form of a Network Access Identifier (NAI) as defined in TS 23.003. The SUCI provided by the W-AGF to the AMF is derived from the EAP-Identity message received from the N5GC device or AUN3 device, as defined in TS 33.501. The format of this SUCI is defined in TS 23.003.

This clause specifies high level definition of services specific for WWC scenario. PWS functionality as described in TS 23.041 is not supported for Wireline access but may be supported by RG(s) connected over 3GPP access.

IPTV is defined as multimedia services such as television/video/ audio/text/graphics/data delivered over IP-based networks managed to support the required level of QoS/QoE, security, interactivity and reliability. STB obtains IPTV service via RG, including 5G-RG and FN-RG, which are connected to 5GC. The procedures to support IPTV is specified in clause 7.7.1.