The present document studies forward compatibility for 3GPP Charging Applications over Rf and Ro Reference Points, specified by using IETF Diameter protocol.
In particular, it is investigated how to conform with TR 29.819
conclusion on Diameter extensibility rules, per following clause 184.108.40.206 statement:
"For 3GPP Diameter Accounting application using the Diameter Base Protocol Accounting (application Id =3), such as specified in the TS 32.299
, further studies are required to evaluate how AVPs can be added to existing commands with the M-bit cleared to avoid backward compatible issues."
This document is independent of whether IETF RFC 3588
or IETF RFC 6733
is referred to as the Diameter Base protocol for Rf and Ro. Update from IETF RFC 3588
to IETF RFC 6733
can be decided prior to any conclusion from this study.