Methods and apparatus supporting dynamic ethernet VLAN configuration in a fifth generation system
Methods and apparatuses for a 5G System (5GS) ( 20 ) support dynamic and semi-dynamic VLAN configuration for Ethernet bridging services provided by the 5GS. The 5GS ( 20 ) includes a node that is configured to receive and store VLAN configuration information for a CE ( 12 ). Particularly, the VLAN configuration information, which comprises a single predefined VLAN ID (VID) or a list of non-predefined VIDs or a single non-predefined VID, may be stored advantageously within 5G Virtual Network (VN) Group Data and indicates whether the UE ( 12 ) acts as an Ethernet trunk port or access port. With respect to the 5GS (20) establishing or modifying an Ethernet PDU session for the UE ( 12 ), a UPF ( 22 ) of the 5GS ( 20 ) configures Ethernet bridging operations for the UE as an access port or a trunk port, in dependence on the VLAN configuration information.
1 . A method performed by one or more network functions (NFs) of a Fifth Generation System (5GS) that provides Ethernet bridging operations for User Equipments (UEs) acting as Ethernet access ports or Ethernet trunk ports, the method comprising:
receiving Virtual Local Area Network (VLAN) configuration information for a User Equipment (UE) from an Application Function (AF), the VLAN configuration information for the UE comprising a predefined VLAN ID (VID) or a list of non-predefined VIDs if the UE is an Ethernet trunk port, or comprising a single non-predefined VID if the UE is an Ethernet access port; and
storing the VLAN configuration information, for subsequent use by the 5GS in configuring Ethernet bridging operations with respect to the UE, when establishing or modifying an Ethernet Protocol Data Unit (PDU) session for the UE.
2 . The method according to claim 1 , wherein the VLAN configuration information is received and stored as part of 5G Virtual Network (VN) Group Data.
3 . The method according to claim 2 , wherein the 5G VN Group Data is extended to include a VID field to hold the VLAN configuration information.
4 . The method according to claim 2 , wherein the VLAN configuration information is embedded in a Domain Network Name (DNN) field of the 5G VN Group Data.
5 . The method according to claim 2 , wherein the VLAN configuration information is embedded in an Application Descriptor field that is comprised in the 5G VN Group Data.
6 . The method according to claim 2 , wherein the VLAN configuration information is embedded in a Single Network Slice Selection Assistance Information (S-NSSAI) field that is comprised in the 5G VN Group Data.
7 . The method according to claim 1 , wherein, to receive the VLAN configuration information from the AF, the method includes providing a configuration Application Programming Interface (API) to the AF via a Network Exposure Function (NEF) of the 5GS that enables provisioning by the AF of the VLAN configuration information in 5G Virtual Network (VN) Group Data.
8 . The method according to claim 7 , wherein the NEF is configured to recognize the VLAN configuration information, as received from the AF as part of provisioning the 5G VN Group Data, and to place the VLAN configuration information in a dedicated data field added to the 5G VN Group Data for carrying the VLAN configuration information.
9 . The method according to claim 1 , wherein storing the VLAN configuration information for subsequent use by the 5GS comprises a Network Exposure Function (NEF) of the 5GS sending signaling indicating 5G VN Group Data to a node of the 5GS operating as a Unified Data Management (UDM)/Unified Data Repository (UDR), the 5G VN Group Data including the VLAN configuration information.
10 . The method according to claim 1 , wherein the receiving and storing steps of the method are performed by a Network Exposure Function (NEF) of the 5GS, and wherein the method further comprises a Session Management Function (SMF) of the 5GS subsequently retrieving the VLAN configuration information in conjunction with the 5GS establishing or modifying an Ethernet Protocol Data Unit (PDU) session for the UE.
11 . The method of claim 10 ,
wherein, in a case where the VLAN configuration information for the UE comprises a single non-predefined VID, a User Plane Function (UPF) associated with the SMF configures Ethernet bridging operations based on the UE being an Ethernet access port associated with a single VLAN identified by the single non-predefined VID; or
wherein, in a case where the VLAN configuration information for the UE comprises a list of non-predefined VIDs, the UPF configures Ethernet bridging operations based on the UE being an Ethernet trunk port associated with multiple VLANs respectively identified by the list of non-predefined VIDs; or
wherein, in a case where the VLAN configuration information for the UE comprises a single predefined VID, the UPF initiates Multiple VLAN Registration Protocol (MVRP) for the UE, to learn VIDs of VLANs associated with the UE and configures Ethernet bridging operations based on the UE being an Ethernet trunk port associated with multiple VLANs respectively identified by the learned VIDs.
12 . A Fifth Generation System (5GS) configured to provide Ethernet bridging operations for User Equipments (UEs) acting as Ethernet access ports or Ethernet trunk ports, the 5GS comprising a network node that includes:
communication interface circuitry; and
processing circuitry operatively associated with the communication interface circuitry and configured to operate the network node as a Network Exposure Function (NEF) that is configured to:
receive Virtual Local Area Network (VLAN) configuration information for a User Equipment (UE) from an Application Function (AF), the VLAN configuration information comprising a predefined VLAN ID (VID) or a list of non-predefined VIDs if the UE is an Ethernet trunk port, or comprising a single non-predefined VID if the UE is an Ethernet access port; and
store the VLAN configuration information, for subsequent use by the 5GS in configuring Ethernet bridging operations with respect to the UE, when establishing or modifying an Ethernet Protocol Data Unit (PDU) session for the UE.
13 . The 5GS according to claim 12 , wherein the VLAN configuration information is received and stored as part of 5G Virtual Network (VN) Group Data.
14 . The 5GS according to claim 13 , wherein the 5G VN Group Data by extended to include a VID field to hold the VLAN configuration information.
15 . The 5GS according to claim 13 , wherein the VLAN configuration information is embedded in a Domain Network Name (DNN) field that is comprised in the 5G VN Group Data.
16 . The 5GS according to claim 13 , wherein the VLAN configuration information is embedded in an Application Descriptor field that is comprised in the 5G VN Group Data.
17 . The 5GS according to claim 13 , wherein the VLAN configuration information is embedded in a Single Network Slice Selection Assistance Information (S-NSSAI) field that is comprised in the 5G VN Group Data.
18 . The 5GS according to claim 12 , wherein, to receive the VLAN configuration information from the AF, the NEF is configured to provide a configuration Application Programming Interface (API) to the AF that enables provisioning by the AF of the VLAN configuration information in 5G Virtual Network (VN) Group Data.
19 . The 5GS according to claim 12 , wherein the NEF is configured to store the VLAN configuration information for subsequent use by the 5GS by sending signaling indicating 5G Virtual Network (VN) Group Data to another node of the 5GS operating as a Unified Data Management (UDM)/Unified Data Repository (UDR), the 5G VN Group Data including the VLAN configuration information.
20 . The 5GS according to claim 12 , wherein the 5GS further comprises a Session Management Function (SMF), where the SMF is configured to subsequently retrieve the VLAN configuration information in conjunction with the 5GS establishing or modifying an Ethernet Protocol Data Unit (PDU) session for the UE.