Gateway control protocol: ITU-T H.248 support for control of transport security using the datagram transport layer security (DTLS) protocol
|Publication Date:||1 October 2014|
Datagram transport layer security (DTLS) protocol [b-IETF RFC 4347] and [IETF RFC 6347] is derived and thus aligned with the transport layer security (TLS) protocol [IETF RFC 5246]. There are consequently many commonalities between the control of DTLS bearers and TLS bearers in ITU-T H.248 gateways.
ITU-T H.248-controlled TLS bearers are subject of [ITU-T H.248.90] and [ITU-T H.248.91].
The purpose of this Recommendation is to define usage of [ITU-T H.248.90] for DTLS bearers. It includes in particular:
- description of DTLS specific use cases;
- modelling information;
- description of MG bearer plane differences between DTLS and TLS;
- usage of TLS-defined ITU-T H.248 packages for DTLS bearer types; and
- an extension package for the specific application of DTLS-SRTP [IETF RFC 5764].
Appendix I provides a non-exhaustive list of example use cases for DTLS in two slightly different areas of applications:
1. DTLS as "transport security" means for "DTLS-over-L4" or "L4-over-DTLS" IP bearer traffic; and
2. DTLS as "key exchange" means for RTP/L4/IP bearer traffic using media security according to the secure real-time transport protocol (SRTP).