SMF Config / ULCL Config
This document explains the detail of SMF config. Also provide some examples about conversion between config file and real userplane topology
ULCL limitation: The branching UPF now can’t connect to the Internet. It only serves as a Intranet in the UPF topology. (Please refers to the topology of example 2)
SBI
| Field | meaning |
|---|---|
| scheme | The protocol for SBI |
| ipv4Addr | SMF provide the SBI service on this IP |
| port | SMF bind the SBI service to this port |
PFCP
| Field | meaning |
|---|---|
| addr | SMF bind PFCP to this IP |
Userplane Information
| Field | meaning |
|---|---|
| userplane_information | Includes topology and information of RAN and UPFs which are controlled by this SMF |
| up_nodes | The node in the user plane topology. Includes gNodeB, I-UPF and A-UPF |
| links | The edge in the user plane topology |
| type | Indicate it is RAN or specific kind of UPF |
| an_ip | The IPv4 address of RAN |
| node_id | The PFCP IPv4 address for UPF |
| up_resource_ip | The user plane IPv4 address for UPF |
Note:
up_resource_ip serves as default user plane IP for the UPF.
In this version, UPF will determine its user plane IP by itself.
So setting up_resource_ip in SMF config won’t affect real config in user plane.
AMF Config
To understand whole PDU session config, we must take a step forward to understand the AMF config.
| Field | meaning |
|---|---|
| NGAPIPList | AMF bind NGAP to this IP |
| SBI | Same meaning with SMF/SBI. |
Example 1
SMF Config
- sbi:
- scheme: https
- ipv4Addr: 127.0.0.1
- port: 29502
- pfcp:
- addr: 10.200.200.1
- userplane_information:
- up_nodes:
- gNB1:
- type: AN
- an_ip: 192.188.2.3
- UPF:
- type: UPF
- node_id: 10.200.200.101
- up_resource_ip: 192.188.2.2
- gNB1:
- links:
- A: gNB1
- B: UPF
- up_nodes:
AMF Config
- ngapIpList:
- 127.0.0.1
- sbi:
- scheme: https
- ipv4Addr: 127.0.0.1
- port: 29518
Representing Topology
Example 2
SMF Config
- sbi:
- scheme: https
- ipv4Addr: 127.0.0.1
- port: 29502
- pfcp:
- addr: 10.200.200.1
- userplane_information:
- up_nodes:
- gNB1:
- type: AN
- an_ip: 192.188.2.3
- BranchingUPF:
- type: UPF
- node_id: 10.200.200.102
- up_resource_ip: 192.188.2.2
- AnchorUPF1:
- type: UPF
- node_id: 10.200.200.101
- up_resource_ip: 192.188.2.23
- AnchorUPF2:
- type: UPF
- node_id: 10.200.200.103
- up_resource_ip: 192.188.2.24
- links:
- A: gNB1 B: BranchingUPF
- A: BranchingUPF B: AnchorUPF1
- A: BranchingUPF B: AnchorUPF2
- gNB1:
- up_nodes:
AMF Config
- ngapIpList:
- 127.0.0.1
- sbi:
- scheme: https
- ipv4Addr: 127.0.0.1
- port: 29518
Representing Topology
