About Protocol Translation
The Protocol Translation enables inter-working between EPC network elements and 5GC NFs. Perform mapping of HTTP/2 to Diameter messages and vice versa.
Figure 3-2 Protocol Translation

Protocol translation enables migration and inter-working strategy for an LTE network by performing protocol translation.
- Diameter-HTTP/2
inter-working is based on generic framework using IE mapping configuration and
includes built-in support for the following Diameter-HTTP/2 inter-working use
cases.
- Inter-working between AF(CSCF) & PCF for IMS, QoS Control, SDC, and so on, use cases - Rx to N5
- Inter-working between NF & PCRF for IMS, QoS Control, SDC, and so on, use cases - N7 to Gx
- Supports for HTTP/2 to HTTP/1.1
- Supports payload transformation - JSON to XML
- Supports customization of inter-working IEs of HTTP/2 and diameter messages
PCF Session Binding Discovery success case