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Re: [Question #242277]: C_TRANS and D_TRANS

 

Question #242277 on rohc changed:
https://answers.launchpad.net/rohc/+question/242277

    Status: Open => Answered

Didier Barvaux proposed the following answer:
Hello,

The ROHC library does not support that the ROHC compressor changes the
operational mode by itself. The ROHC library only support that the ROHC
decompressor asks the ROHC compressor to change the operational mode
(through a feedback packet). So, the C_TRANS and D_TRANS parameters are
not fully implemented. I created a blueprint for this feature
(https://blueprints.launchpad.net/rohc/+spec/mode-transitions) for
release 1.8.0.

About the packet formats, the IR and IR-DYN packets of the RTP profile
got a Mode field in the RTP dynamic part. See
https://tools.ietf.org/html/rfc3095#section-5.7.7.6

Regards,
Didier

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