| Glossary |
| ======== |
| - DBUF: Software service responsible of implementing the UPF Downlink buffering feature |
| - DDN: Downlink Data Notification |
| - PCP: Programmable Control Plane team, now merged with PDP into SD-Fabric |
| - PDP: Programmable Data Plane team, now merged with PCP into SD-Fabric |
| - QFI: QoS Flow Identifier |
| - TOST: Trellis, ONOS, Stratum and Tofino, the predecessor of SD-Fabric (now obsolete) |
| - TNA: Tofino Native Architecture |
| - UPF: 5G User Plane Function |
| - UP4: P4 implementation of UPF of control-stack based on ONOS |